Patent Publication Number: US-11387593-B2

Title: High voltage connector assembly and motor-operated compressor including the same

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a high-voltage connector assembly and a motor-operated compressor including the same. More particularly, the present disclosure relates to a high-voltage connector assembly having a structure that easily connects a high-voltage connector and a housing, and prevents electric current leakage and water leakage through the high-voltage connector, and a motor-operated compressor including the same. 
     2. Description of the Related Art 
     A compressor designed to compress a refrigerant in an air conditioning system for vehicles has been developed in various forms. Recently, as automobile components are becoming electrical, a motor-operated compressor driven by electricity has been actively developed. 
     The motor-operated compressor mainly employs a scroll compression method suitable for a high compression ratio operation among various compression methods. Such a scroll type motor-operated compressor (hereinafter, referred to as “motor-operated compressor”), includes a motor unit, a compression unit, and a rotating shaft that connects the motor unit and the compression unit. 
     In detail, the motor unit configured as a rotary motor is installed in a hermetic casing, and the compression unit configured by a fixed scroll and an orbiting scroll is disposed at one side of the motor unit. The rotating shaft is configured such that a rotational force of the motor unit is transferred to the compression unit. 
     The rotary motor is configured to receive power and a control signal from an external power source, such as a battery, and a controller. To this end, the rotary motor is electrically connected to the external power source and the controller (hereinafter referred to as “power source, etc.”). The electric connection can be enabled by an electrically conductive member such as a conducting wire. 
     When the motor-operated compressor is in operation, vibration may be generated in the motor-operated compressor due to rotation of the rotary motor and an orbiting scroll. When connected by a conducting wire, or the like, electric connection between the motor-operated compressor and the power source, etc. may be arbitrarily disconnected by the vibration. 
     Thus, a connector is generally used to connect the motor-operated compressor and the power source, etc. 
     A connector  1000  of a motor-operated compressor according to the related art is illustrated in  FIGS. 1 and 2 . 
     The connector  1000  according to the related art is configured such that an inverter device and a rotary motor accommodated in the motor-operated compressor are eclectically connected to an external power source, etc. 
     The connector  1000  includes a cover  1100  and a connector  1200  made of aluminum (Al). The connector  1200  is configured to shield noise of a filter unit (not shown) to which a conducting wire  1800  is electrically connected. 
     The connector  1200  is inserted into a space formed inside the cover  1100 . In detail, the connector  1200  is insertedly coupled to the cover  1100  through an insertion portion  1130  formed as an opening at one side of the cover  1100 . 
     Once the connector  1200  is inserted, a plate  1300 , a sealing part (or unit)  1400 , and a conducting wire coupling portion  1500  are sequentially inserted into the space. Then, a bracket  1600  is coupled to the cover  1100  by a bolt  1700 . 
     To this end, a bolt coupling groove  1120  is provided on the cover  1100  in a recessed manner. In addition, a bolt coupling hole  1620  is formed through a corresponding position of the bracket  1600 . 
     When this process is completed, the connector  1000  is coupled to the motor-operated compressor. In detail, a separate coupling member (not shown) is coupled to each of coupling holes  1110  formed through the cover  1100 , respectively, so that the connector  1000  is coupled to the motor-operated compressor. 
     Thereafter, the conducting wire  1800  is inserted into the connector  1000 . The conducting wire  1800  is electrically connected to the connector  1200  by passing through a conducting wire penetrating portion  1610  and a through hole formed on the plate  1300 . 
     As such, the connector  1000  according to the related art requires a large number of members for manufacturing. Thus, a unit cost of production, time, etc. for manufacturing each of the members are increased. Further, as many members are provided, weight of the connector  1000  is increased accordingly. 
     In addition, if the members are not tightly (or hermetically) assembled to each other, electric current leakage may occur through a gap between the members. When the motor-operated compressor is provided in a vehicle or the like, moisture may be introduced through the gap, which may cause a malfunction of the motor-operated compressor. 
     Furthermore, the connector  1000  is connected to the motor-operated compressor that accommodates a rotary member therein. Accordingly, various members provided at the connector  1000  may be damaged or decoupled (or separated) by vibration generated in the motor-operated compressor. 
     A compressor assembly and an electric connector for the compressor assembly are disclosed in Korean Patent Laid-Open Publication No. 10-1078657, which is hereby incorporated by reference. In detail, an outer connector block assembly and an inner connector block assembly are assembled to each other using a conductor pin, so as to prevent end fittings assembled to a connector block from being disassembled (or detached). 
     However, the electric connector having such a structure does not provide solutions for reducing the number of parts of a connector, maintaining airtightness (or hermetically sealed state) between parts coupled to each other, etc. 
     A connector for a motor-operated compressor is disclosed in Korean Patent Laid-Open Publication No. 10-1693388, which is hereby incorporated by reference. More particularly, a connector for a motor-operated compressor having a structure that can protect users from a potential electrical shock is disclosed. In order for this, a residual voltage is discharged on a terminal of the connector of the compressor simultaneously when a power supply connector is disconnected from the connector of the compressor. 
     However, the connector having such a structure has a limitation in that there is no consideration for reducing the number of parts of a connector and maintaining airtightness between parts coupled to each other. 
     Furthermore, in the above-mentioned Patent Documents, a method for maintaining a hermetically sealed state between members coupled to each other and a method for preventing damage caused by vibration generated when a motor-compressor is driven. 
     RELATED ART DOCUMENT 
     Patent Document 
     Korea Patent Laid-Open Publication No. 10-1078657 (Published on Nov. 1, 2011) 
     Korea Patent Laid-Open Publication No. 10-1693388 (Published on Jan. 5, 2017) 
     SUMMARY 
     Embodiments herein provide a high-voltage connector assembly having a structure that can solve the above-mentioned problems, and a motor-operated compressor including the high-voltage connector assembly. 
     One aspect of the present disclosure is to provide a high-voltage connector assembly and a motor-operated compressor including the same, capable of reducing the number of members constituting the high-voltage connector assembly used for electrically connecting the motor-operated compressor to an external power source and controller. 
     Another aspect of the present disclosure is to provide a high-voltage connector assembly and a motor-operated compressor including the same, capable of reducing manufacturing time and costs. 
     Still another aspect of the present disclosure is to provide a high-voltage connector assembly and a motor-operated compressor including the same, capable of enabling members constituting the high-voltage connector assembly to be coupled to one another in an easier manner. 
     Still another aspect of the present disclosure is to provide a high-voltage connector assembly and a motor-operated compressor including the same, capable of enhancing durability against vibration generated when a motor-operated compressor is in operation. 
     Still another aspect of the present disclosure is to provide a high-voltage connector assembly and a motor-operated compressor including the same, capable of effectively shielding electromagnetic noise generated when a motor-operated compressor is in operation. 
     Still another aspect of the present disclosure is to provide a high-voltage connector assembly and a motor-operated compressor including the same, capable of increasing a coupling force between a cover and a shielding plate. 
     Still another aspect of the present disclosure is to provide a high-voltage connector assembly and a motor-operated compressor including the same, capable of minimizing a gap between a cover and a shielding plate generated due to a difference in thermal expansivity between the cover and the shielding plate. 
     Embodiments disclosed herein provide a high-voltage connector assembly that may include a cover having an opening portion formed at one side thereof and provided therein with a space portion communicating with the opening portion, and a shielding plate disposed inside the cover so as to cover the opening portion and configured to shield noise generated in an Electromagnetic Compatibility (EMC) filter. The cover and the shielding plate may be integrally formed with each other. 
     The cover may be made of an insulating material, and the shielding plate may be made of a conductive material. The cover and the shielding plate may be formed by double shot molding. 
     Embodiments disclosed may further provide a high-voltage connector assembly that may include a holder coupled to the cover to hermetically seal an inside of the cover. The holder may be detachably coupled to another side of the cover. 
     In addition, the another side of the cover may be provided with a boss portion protruding by a predetermined distance. The boss portion may be provided therein with a cable insertion portion communicating with the space portion and configured to be opened so as to allow a high-voltage cable to be inserted. The holder may be coupled to the cover so as to cover the cable insertion portion. 
     The cover and the holder may be snap-fitted to each other. 
     In addition, the boss portion may include a holder coupling protrusion that protrudes from one outer surface of the boss portion by a predetermined distance. The holder may include a cover coupling portion protruding in a lengthwise direction by a predetermined distance, and a cover insertion hole provided in the cover coupling portion and formed though the cover coupling portion at a predetermined angle with respect to the lengthwise direction of the cover coupling portion. When the holder is coupled to the cover, the holder coupling protrusion may be inserted into the cover insertion hole. 
     The cover and the holder may be provided therebetween with a support plate located adjacent to the cover and configured to support a high-voltage cable inserted into the cover, and a sealing part located adjacent to the support plate and configured to surround the inserted high-voltage cable. The cover, the support plate, the sealing part, and the holder may be sequentially disposed. 
     The shielding plate may include a plate outer circumferential portion that comes in contact with an inner circumferential portion of the cover and defines an outer circumference of the shielding plate. The plate outer circumferential portion may have a higher roughness than the inner circumferential portion of the cover. 
     Further, the shielding plate may include a plate outer circumferential portion that comes in contact with an inner circumferential portion of the cover and defines an outer circumference of the shielding plate. The plate outer circumferential portion may be provided with a plate protrusion protruding from the plate outer circumferential portion so as to increase a surface area. 
     A plurality of plate protrusions may be provided to be spaced apart from one another by a predetermined distance along the plate outer circumferential portion. 
     In addition, the shielding plate may include a plate outer circumferential portion that comes in contact with an inner circumferential portion of the cover and defines an outer circumference of the shielding plate. A surface of the outer circumferential portion may be provided with a plurality of uneven portions so as to increase a surface area. 
     Embodiments disclosed herein also provide a motor-operated compressor that may include a main housing accommodating a motor and a compression unit therein, a front housing communicating with the main housing and having an inlet port formed through one side thereof so that a refrigerant is introduced into the main housing, and a high-voltage connector assembly coupled to the front housing and configured to support a high-voltage cable electrically connected to an external controller. The high-voltage connector assembly may include a cover having an opening portion formed at one side thereof and provided therein with a space portion communicating with the opening portion, and a shielding plate disposed inside the cover so as to cover the opening portion and configured to shield noise generated in an Electromagnetic Compatibility (EMC) filter. The cover and the shielding plate may be integrally formed with each other. 
     In addition, the high-voltage connector assembly of the motor-operated compressor may include a holder coupled to the cover and configured to hermetically seal an inside of the cover. The holder may be detachably coupled to another side of the cover. 
     The shielding plate may include a plate outer circumferential portion that comes in contact with an inner circumferential portion of the cover and defines an outer circumference of the shielding plate. The plate outer circumferential portion may be provided with at least one of a plate protrusion protruding therefrom, and a plurality of uneven portions. 
     The embodiments of the present disclosure may provide the following benefits. 
     First, a cover and a shielding plate are integrally formed by double shot molding. In addition, the cover and other components may be coupled to each other by a holder. 
     Accordingly, a cover and a shielding connector are not necessarily provided separately. In addition, a separate (or additional) coupling member for coupling the cover and the other components is not required. As a result, the number of members of a high-voltage connector assembly may be reduced. 
     Further, as the number of members of the high-voltage connector assembly is reduced, a unit cost of production for each of the members may be reduced. 
     Furthermore, as the number of members is reduced, the number of members to be coupled to each other is reduced accordingly, thereby decreasing a time taken to manufacture the high-voltage connector assembly. 
     In addition, the cover and the shielding plate may be integrally formed in a manner of double shot molding. Also, the cover and the other members are coupled by the holder. The holder and the cover may be coupled to each other in a snap-fit manner. 
     Accordingly, the cover and the shielding plate are not necessarily coupled to each other, separately. In addition, a separate coupling member is not required to couple the holder and the cover to each other. This makes easier for the cover and shielding plate, and the cover and the holder to be coupled to each other, respectively. 
     Also, as described above, the number of members of the high-voltage connector assembly is reduced. Accordingly, a contact area between members may be reduced. In addition, a clearance that may be generated between members may be reduced. Thus, durability against vibration may be enhanced. 
     Further, the shielding plate designed to shield electromagnetic noise is formed integrally with the cover. Accordingly, even if vibration is generated by operating a motor-operated compressor, the shielding plate is not moved or swayed inside the cover. Thus, the shielding plate can be located at an optimal position for shielding electromagnetic noise. 
     This allows electromagnetic noise generated when the motor-operated compressor is in operation may be effectively shielded. 
     In addition, in one embodiment, an outer circumference of the shielding plate may have a relatively high roughness. Thus, a contacting force between the shielding plate and the cover can be increased. At the same time, a frictional force between the shielding plate and the cover may be increased. 
     Thus, a coupling force between the shielding plate and the cover may be increased. Accordingly, even if the cover and the shielding plate are thermally expanded to different degrees by heat produced when the motor-operated compressor is driven, a clearance may be minimized. 
     In another embodiment, a plate protrusion may protrude from the outer circumference of the shielding plate that comes in contact with the cover. The plate protrusion may be configured to increase a contact area between the shielding plate and the cover. In addition, a plurality of plate protrusions may be provided to be spaced apart from one another by a predetermined distance, thereby forming a space between neighboring plate protrusions. 
     Accordingly, a coupling force between the shielding plate and the cover may be increased. Thus, even if the cover and the shielding plate are thermally expanded to different degrees by heat produced when the motor-operated compressor is in operation, a clearance may be minimized. 
     Further, in another embodiment, an uneven portion may be formed on the outer circumference of the shielding plate that comes in contact with the cover. The uneven portion may be configured to increase a contact area between the shielding plate and the cover. 
     Accordingly, a coupling force between the shielding plate and the cover may be increased. Thus, even if the cover and the shielding plate are thermally expanded to different degrees by heat produced when the motor-operated compressor is in operation, a clearance may be minimized. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a high-voltage connector according to the related art. 
         FIG. 2  is an exploded perspective view of the high-voltage connector of  FIG. 1 . 
         FIG. 3  is a perspective view of a motor-operated compressor according to an embodiment of the present disclosure. 
         FIG. 4  is a perspective view of a high-voltage connector assembly applied to the motor-operated compressor of  FIG. 3 . 
         FIG. 5  is an exploded perspective view of the high-voltage connector assembly of  FIG. 4 . 
         FIGS. 6A and 6B  are a perspective view and a planar views, respectively, illustrating a high-voltage connector assembly according to another embodiment of the present disclosure. 
         FIG. 7  is a cross-sectional view illustrating a state in which the high-voltage connector assembly of  FIG. 6  is coupled to the motor-operated compressor. 
         FIG. 8  is a cross-sectional view of a high-voltage connector assembly according to yet another embodiment of the present disclosure. 
         FIG. 9  is a lateral view illustrating a state in which a high-voltage connector assembly according to an embodiment of the present disclosure is coupled to a motor-operated compressor. 
         FIG. 10  is an exploded view illustrating a state in which a high-voltage connector assembly according to an embodiment of the present disclosure is coupled to a motor-operated compressor 
         FIG. 11  is a cross-sectional view illustrating a state in which a high-voltage connector assembly according to an embodiment of the present disclosure is coupled to a motor-operated compressor. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Description will now be given for a motor-operated compressor according to embodiments disclosed herein, with reference to the accompanying drawings. 
     For the sake of brief description with reference to the drawings, the same or equivalent components may be provided with the same or similar reference numbers, and description thereof will not be repeated. 
     1. Definition of Terms 
     It will be understood that when an element is referred to as being “connected with” another element, the element can be directly connected with the other element or intervening elements may also be present. 
     On the contrary, in case where an element is “directly connected” or “directly linked” to another element, it should be understood that any other element is not existed therebetween. 
     A singular representation may include a plural representation as far as it represents a definitely different meaning from the context. 
     A term “refrigerant” used in the following description may mean a medium that takes heat away from a low temperature object and transports the heat to a higher temperature object. In one embodiment, the refrigerant may be a carbon dioxide (CO 2 ), R134a, R1234yf, R744, or the like. 
     In the following description, it is assumed that R134a is used as a refrigerant for a motor-operated compressor  10  according to embodiments described herein, but other refrigerants described above may also be used in the motor-operated compressor  10  according to the embodiments of the present disclosure. 
     2. Description of Configuration of Motor-Operated Compressor  10  According to Embodiment 
     Referring to  FIG. 3 , a motor-operated compressor  10  according to an embodiment of the present disclosure may include a main housing  100 , a rear housing  200 , a front housing  300 , and an Electromagnetic Compatibility (EMC) filter  400 . 
     In addition, the motor-operated compressor  10  according to this embodiment may further include a high-voltage connector assembly  500  so as to be electrically connected to an external power source (not shown) and controller (not shown). 
     Hereinafter, each of components of the motor-operated compressor  10  according to this embodiment will be described with reference to  FIG. 3 , but the high-voltage connector assembly  500  will be described in another section. 
     (1) Description of the Main Housing  100   
     The main housing  100  may define an outer appearance (or shape) of the motor-operated compressor  10 . A predetermined space may be formed inside the main housing  100 . Various components for compressing or pressurizing a refrigerant may be accommodated in the space. 
     For example, although not shown, a compression unit (not shown) for pressurizing a refrigerant, a motor unit (or motor) (not shown) for applying a rotational force to the compression unit (not shown) may be accommodated in the inner space of the main housing  100 . 
     In addition, a rotating shaft (not shown) that transmits the rotational force of the motor unit (not shown) to the compression unit (not shown) may also be accommodated in the inner space of the main housing  100 . 
     A shape of the main housing  100  may differ according to a shape of the space formed therein. In this embodiment, the main housing  100  has a cylindrical shape extending in the lengthwise direction. This is to have a high pressure resistance against a refrigerant compressed in the inner space of the main housing  100 . 
     The rear housing  200  may be located at one side of the main housing  100 , for example, at a right side of the main housing  100  in the illustrated embodiment. 
     The main housing  100  may communicate with the rear housing  200 . A refrigerant pressurized in the main housing  100  may be introduced into the rear housing  200 . The refrigerant may be discharged to an outside of the motor-operated compressor  10  through an exhaust port  210  provided at the rear housing  200 . 
     The front housing  300  may be located at another side of the main housing  100 , for example, a left side, opposite to the rear housing  200 , in the illustrated embodiment. 
     The main housing  100  may communicate with the front housing  300 . A refrigerant introduced through an inlet port  312  of the front housing  300  may be introduced into the main housing  100 . The refrigerant may be pressurized by the compression unit (not shown) accommodated in the main housing  100 . 
     The main housing  100  may be electrically connected to the front housing  300 . Power and a control signal required to drive the motor unit (not shown) are applied by the external power source (not shown) and controller (not shown). 
     The external power source (not shown) and controller (not shown) may be electrically connected to the high-voltage connector assembly  500 , so that power and a control signal are applied to the front housing  300 . The power and the control signal applied to the front housing  300  may be transmitted to the main housing  100 , allowing the motor unit (not shown) to be driven. 
     To this end, the main housing  100  may be electrically connected to the front housing  300  by an electrically conductive member (not shown). In one embodiment, the electrically conductive member (not shown) may be implemented as a conducting wire.
         (2) Description of the Rear Housing  200         

     The rear housing  200  may define an outer appearance of the motor-operated compressor  10 . 
     A predetermined space may be formed inside the rear housing  200 . A refrigerant discharge passage (not shown) through which a compressed refrigerant is discharged may be provided at the space. In addition, the space may be provided with an oil discharge passage (not shown) through which oil separated from the compressed refrigerant is discharged. 
     The rear housing  200  may be located at one side of the main housing  100 , for example, at the right side of the main housing  100  in the illustrated embodiment. 
     The rear housing  200  may communicate with the main housing  100 . A refrigerant pressurized from the inner space of the main housing  100  may be introduced into the rear housing  200 . The refrigerant may be discharged to the outside of the motor-operated compressor  10  after an oil separation process. 
     The exhaust port  210  may be provided at one side of the rear housing  200 . The exhaust port  210  may be configured to provide communication between an inner space of the rear housing  200  and the outside. In one embodiment, the exhaust port  210  may be configured as a through hole. 
     (3) Description of the Front Housing  300   
     The front housing  300  may define an outer appearance of the motor-operated compressor  10 . 
     A predetermined space may be formed inside the front housing  300 . An inverter device (not shown) that processes power and a control signal applied from the external power source (not shown) and controller (not shown), respectively, may be disposed at the space. Accordingly, the space may be referred to as an “inverter chamber”. 
     The front housing  300  may be located at one side of the main housing  100 , for example, the left side, opposite to the rear housing  200 , in the illustrated embodiment. 
     The front housing  300  may communicate with the main housing  100 . A refrigerant introduced into the front housing  300  may flow into the main housing  100 . The introduced refrigerant may be pressurized by the compression unit (not shown) accommodated in the inner space of the main housing  100 . 
     An inner space of the front housing  300  may be electrically connected to the inner space of the main housing  100 . Power and a control signal transmitted to the inverter device (not shown) may be transferred to the motor unit (not shown) accommodated in the main housing  100 . In one embodiment, an electrically conductive member (not shown) such as a conducting wire may be provided to allow the electrical connection between the inner space of the front housing  300  and the inner space of the main housing  100 . 
     A partition wall (not shown) may be provided in the inner space of the front housing  300 . The partition wall may separate a space in which a refrigerant flows from a space in which the inverter device (not shown) is accommodated. 
     When the partition wall is provided, a communication hole may be provided at the partition wall. A refrigerant introduced into the inner space of the front housing  300  may flow into the space in which the inverter device is accommodated through the communication hole. In this case, the inverter device may be directly cooled by the refrigerant introduced thereinto. 
     The front housing  300  may include a first front cover  310 , a second front cover  320 , a connector coupling portion  330 , and a filter accommodating portion  340 . 
     The first front cover  310  may define one side of the front housing  300 . The first front cover  310  may be located adjacent to the main housing  100 . 
     The first front cover  310  may be coupled to the main housing  100 . A through hole (not shown) may be formed in the first front cover  310 , allowing the inner space of the front housing  300  and the inner space of the main housing  100  to communicate with each other. 
     The first front cover  310  and the second front cover  320  may be coupled to each other. A predetermined space, which may be referred to as ‘inverter chamber’, is formed between the first front cover  310  and the second front cover  320 . The inverter device (not shown) may be accommodated in the space. 
     The first front cover  310  may include the inlet port  312 . The inlet port  312  is a passage through which a refrigerant at the outside flows into the inner space of the front housing  300 . In one embodiment, the inlet port  312  may be formed as a through hole. 
     The second front cover  320  may define another side of the front housing  300 . The second front cover  320  may be located at one side of the first front cover  310 , which is opposite to the main housing  100 . The second front cover  320  may be located at the left side, which is an opposite side of the main housing  100  with respect to the first front cover  310  in the illustrated embodiment. 
     The second front cover  320  and the first front cover  310  may be coupled to each other. A predetermined space, which may be referred to as ‘inverter chamber’, is formed between the second front cover  320  and the first front cover  310 . The inverter device (not shown) may be accommodated in the space. 
     The high-voltage connector assembly  500  may be electrically coupled to the connector coupling portion  330 . In one embodiment, the high-voltage connector assembly  500  may be coupled to the connector coupling portion  330  by a screw. To this end, the connector coupling portion  330  may be provided with a hollow portion through which the screw is inserted in a penetrating manner. 
     A high-voltage cable  20  may be electrically connected to the high-voltage connector assembly  500 . An external connector  21  may be provided at another side of the high-voltage cable  20 . The external connector  21  may be electrically connected to the external power source (not shown) and controller (not shown), respectively. 
     This configuration may allow the external power source (not shown) and controller (not shown) to be electrically connected to the motor-operated compressor  10 . 
     The connector coupling portion  330  may be located at the first front cover  310 . In the illustrated embodiment, on an outer circumference of the first front cover  310 , the connector coupling portion  330  is located at a lower side of the inlet port  312 . A location (or position) of the connector coupling portion  330  may be changed. 
     The EMC filter  400  may be inserted into the filter accommodating portion  340 . In detail, a filter body portion  420  of the EMC filter  400  may be inserted into the filter accommodating portion  340  (see  FIG. 11 ). 
     The filter accommodating portion  340  may be defined as a space recessed by a predetermined distance from an outer circumferential surface of the first front cover  310 . A shape of the filter accommodating portion  340  may, preferably, be determined according to a shape of the EMC filter  400 . 
     The high-voltage connector assembly  500  may be coupled to an outer side of the high-voltage connector assembly  500  inserted into the filter accommodating portion  340 . Accordingly, the EMC filter  400  may be stably accommodated in the filter accommodating portion  340 . 
     (4) Description of the Electromagnetic Compatibility (EMC) Filter  400   
     The EMC filter  400  may filter power and a control signal applied from the external power source (not shown) and controller (not shown), respectively. The EMC filter  400  may be configured such that an electrical signal in a preset or predetermined frequency range is only passed. To this end, the EMC filter  400  may include various electrical devices. 
     The power and the control signal filtered by the EMC filter  400  may be applied to the motor unit (not shown) through the inverter device (not shown). 
     During this filtering process, an electrical noise signal may be generated in the EMC filter  400 . The electrical noise signal may be shielded by a shielding (or shield) plate  520  of the high-voltage connector assembly  500 . Accordingly, the motor-operated compressor  10  may not be affected by the electrical noise signal. 
     The EMC filter  400  may be accommodated in the filter accommodating portion  340 . 
     Referring further to  FIGS. 10 and 11 , the EMC filter  400  may include an electric connection portion  410  and the filter body portion  420 . 
     The inverter device (not shown) accommodated in the front housing  300  and the external power source (not shown) and controller (not shown) may be electrically connected by the electric connection portion  410 . The electric connection portion  410  and the high-voltage cable  20  may be electrically connected to each other. 
     In detail, a terminal unit (not shown) made of a conductive material may be provided at one end of the high-voltage cable  20 , which is electrically connected to the motor-operated compressor  10 . The terminal unit (not shown) may be electrically connected to the electric connection portion  410 , so that power and a control signal may be transmitted to the EMC filter  400 . 
     The electric connection portion  410  may be electrically connected to the inverter device (not shown). One end of the electric connection portion  410  may be connected to the inverter device (not shown) by an electrically conductive member (not shown) such as a conducting wire. 
     In the illustrated embodiment, the electric connection portion  410  may be formed in a cylindrical shape extending in the lengthwise direction. In addition, the electric connection portion  410  may be coupled to the EMC filter  400  in a penetrating manner. 
     When the EMC filter  400  is inserted into the filter accommodating portion  340 , one end of the electric connection portion  410  may protrude from an outer circumferential surface of the front housing  300 . The high-voltage cable  20  may be electrically connected to the protruding end. 
     The filter body portion  420  may define the body of the EMC filter  400 . The filter body portion  420  may be accommodated in the filter accommodating portion  340 . 
     The filter body portion  420  may be made of an electrically conductive material. In the above embodiment, the filter body portion  420  and the inverter device (not shown) may be electrically connected to each other. 
     The electric connection portion  410  may be coupled to the filter body portion  420  in a penetrating manner. Power and a control signal transmitted through the electric connection portion  410  may be transferred to the inverter device (not shown) via the filter body portion  420 . 
     After the filter body portion  420  is accommodated in the filter accommodating portion  340 , the high-voltage connector assembly  500  may be coupled to the front housing  300  in a manner of covering the EMC filter  400 . Accordingly, the EMC filter  400  may not be exposed to the outside. 
     3. Description of the High-Voltage Connector Assembly  500  According to Embodiment 
     Referring to  FIGS. 4 and 5 , the motor-operated compressor  10  according an embodiment of the present disclosure may include the high-voltage connector assembly  500 . The high-voltage cable  20  may be insertedly coupled to the high-voltage connector assembly  500 . The high-voltage connector assembly  500  may support the high-voltage cable  20 . 
     The high-voltage cable  20  may be inserted into the high-voltage connector assembly  500 . One end of the inserted high-voltage cable  20  may be electrically connected to the electric connection portion  410  of the EMC filter  400 . 
     The high-voltage connector assembly  500  may accommodate one end of the high-voltage cable  20 . In addition, the high-voltage connector assembly  500  may accommodate one end of the electric connection portion  410 . In an inner space of the high-voltage connector assembly  500 , the high-voltage cable  20  and the electric connection portion  410  may be electrically connected to each other. 
     The high-voltage connector assembly  500  may be coupled to the connector coupling portion  330  provided at the front housing  300 . In one embodiment, the high-voltage connector assembly  500  may be coupled to the connector coupling portion  330  by a screw. 
     The high-voltage connector assembly  500  may be configured to cover the EMC filter  400 . Accordingly, the EMC filter  400  may not be exposed to the outside by the high-voltage connector assembly  500 . 
     In addition, the high-voltage connector assembly  500  may shield an electrical noise signal generated in the EMC filter  400 . Accordingly, the motor-operated compressor  10  may not be affected by the electrical noise signal. 
     Hereinafter, the high-voltage connector assembly  500  according to embodiments will be described in detail with reference to  FIGS. 4 to 9 . 
     As illustrated in the drawings, the high-voltage connector assembly  500  may include a cover  510 , a shielding plate  520 , a support plate  530 , a sealing part (or unit)  540 , and a holder  550 . 
     In addition, the high-voltage connector assembly  500  may include a plate protrusion portion  560  and an uneven portion  570 , so as to allow the cover  510  and the shielding plate  520  to be firmly or securely coupled to each other and prevent electric current leakage (see  FIGS. 6 to 9 ). 
     (1) Description of the Cover  510   
     The cover  510  may define an outer appearance of the high-voltage connector assembly  500 . A predetermined space may be provided inside the cover  510 . The shielding plate  520  may be accommodated in the space. 
     As illustrated, the cover  510  may extend in a lengthwise direction, and protrude in a widthwise direction by a predetermined distance. A space may be formed in a portion of the cover  510  protruding in the widthwise direction. The high-voltage cable  20  and the electric connection portion  410  may be accommodated in the space. 
     The cover  510  may be made of an insulating material. In one embodiment, the cover  510  may be made of a synthetic resin. 
     The cover  510  may be integrally formed with the shielding plate  520 . In one embodiment, the cover  510  and the shielding plate  520  may be made by double shot molding. In another embodiment, the cover  510  and the shielding plate  520  may be formed by insert injection molding. 
     This allows the cover  510  and the shielding plate  520  to be firmly coupled to each other. Detailed description thereof will be described hereinafter. 
     The cover  510  may include a cover body portion  511 , a cover protruding portion  512 , a cover coupling hole  513 , a space portion  514 , an alignment groove  515 , a boss portion  516 , a cable insertion portion  517 , and an EMC accommodating portion  518 . 
     The cover body portion  511  may define an outer appearance of the cover  510 . The cover body portion  511  may have a rectangular parallelepiped shape with cut-off edges. One side of the cover body portion  511  may be provided with a raised portion  511   a  protruding by a predetermined distance (see  FIG. 10 ). 
     In addition, the space portion  514  may be formed inside the raised portion  511   a . The high-voltage cable  20  and the electric connection portion  410  may be accommodated in the space portion  514 . 
     An outer circumference of the cover body portion  511  may be provided with the cover protruding portion  512  protruding therefrom. In addition, the boss portion  516  may be provided at one side of the cover body portion  511  facing the holder  550  in a protruding manner. 
     The cover body portion  511  may include the raised portion  511   a , an opening portion  511   b , and an inner circumferential portion  511   c.    
     The raised portion  511   a  may protrude from one surface of the cover body portion  511 . The space portion  514  may be provided in the raised portion  511   a . The space portion  514  may accommodate one end of the high-voltage cable  20  and the electric connection portion  410  therein. 
     The opening portion  511   b  may be provided at one side of the cover body portion  511 , which is opposite to the raised portion  511   a.    
     The opening portion  511   b  may be formed through the one side of the cover body portion  511 . The opening portion  511   b  may provide communication between an outside of the cover body portion  511  and the space portion  514 . 
     The opening portion  511   b  may be covered by the shielding plate  520 . That is, the shielding plate  520  may be exposed to an outside of the cover  510  by the opening portion  511   b.    
     The inner circumferential portion  511   c  may form a boundary inside the cover body portion  511 . The shielding plate  520  may be in contact with the inner circumferential portion  511   c . In detail, a plate outer circumferential portion  529  of the shielding plate  520  may come in contact with the inner circumferential portion  511   c.    
     The inner circumferential portion  511   c  may be located inside of one surface of the cover body portion  511  at which the opening portion  511   b  is formed. The inner circumferential portion  511   c  may be located outward than an inner circumference of a first surface  511   d  of the cover body portion  511  that surrounds the opening portion  511   b.    
     Accordingly, when the cover  510  and the shielding plate  520  are coupled to each other, a part or portion of the shielding plate  520 , namely, a portion that corresponds to an area of the opening portion  511   b  may only be exposed to the outside. 
     The cover protruding portion  512  is a portion of the high-voltage connector assembly  500  which is to be coupled to the front housing  300 . The cover protruding portion  512  may protrude from an outer circumference of the cover body portion  511  by a predetermined distance. 
     In the illustrated embodiment, a first cover protruding portion  512   a , a second cover protruding portion  512   b , and a third cover protruding portion  512   c  protruding from one edge of the cover body portion  511  in the lengthwise direction and both corners of the cover body portion  511  in the widthwise direction, respectively. The number of cover protruding portions  512  may be changed. 
     In the illustrated embodiment, the cover protruding portion  512  has a semi-circular shape with a rounded outer end. The number of cover protruding portions  512  may vary. 
     The cover coupling hole  513  may be formed inside the cover protruding portion  512  in a penetrating manner. 
     A coupling member (not shown) may be coupled to the cover coupling hole  513  in a penetrating manner. One end of the coupling member (not shown) coupled through the cover coupling hole  513  may be coupled to the front housing  300 , which allows the high-voltage connector assembly  500  and the front housing  300  to be coupled to each other. 
     The cover coupling hole  513  may be provided in plurality. In the illustrated embodiment, first to third cover coupling holes  513   a ,  513   b , and  513   c  are formed through the first to third cover protruding portions  512   a ,  512   b , and  512   c , respectively. 
     Each of the cover coupling holes  513   a ,  513   b , and  513   c  may be aligned with shielding plate coupling holes  523   a ,  523   b ,  523   c  of the shielding plate  520 , respectively. A coupling member (not shown) may be coupled to each of the cover coupling holes  513   a ,  513   b , and  513   c  and each of the shielding plate coupling holes  523   a ,  523   b , and  523   c  in a penetrating manner. 
     The space portion  514  may be defined as a space formed inside the cover body portion  511 . The high-voltage cable  20  and the electric connection portion  410  may be accommodated in the space portion  514 . In the space portion  514 , the high-voltage cable  20  and the electric connection portion  410  may be electrically connected to each other. 
     The space portion  514  may be surrounded by the cover body portion  511  and the shielding plate  520 . 
     That is, when the shielding plate  520  and the cover  510  are coupled to each other, the space portion  514  and the opening portion  511   b  may be physically separated from each other by the shielding plate  520 . Accordingly, one side of the space portion  514  may be surrounded by the shielding plate  520 . 
     In addition, one side of the space portion  514  opposite to the shielding plate  520  may be surrounded by an inner surface of the raised portion  511   a.    
     The alignment groove  515  may guide the shielding plate  520 , such that the shielding plate  520  is coupled to a predetermined position inside the cover  510 . 
     The alignment groove  515  may be recessed from the inner surface of the raised portion  511   a  by a predetermined distance. An alignment recess  525  of the shielding plate  520  may be inserted into the alignment groove  515 . 
     In the illustrated embodiment, the alignment groove  515  may include a first alignment groove  515   a  having a bent portion at a lower side thereof, and a second alignment groove  515   b  having a linear shape. The first alignment groove  515   a  and the second alignment groove  515   b  may be spaced apart from each other by a predetermined distance. 
     A position, shape, and number of the alignment groove  515  may differ according to a position, shape, and number of the alignment recess  525 . 
     The boss portion  516  is a portion to which the holder  550  is coupled. In addition, a hollow portion may be formed in the boss portion  516 , so that the high-voltage cable  20 , the support plate  530 , and the sealing part  540  are inserted. 
     The boss portion  516  may protrude from the cover body portion  511  by a predetermined distance. In the illustrated embodiment, the boss portion  516  is located at one side of the cover body portion  511  opposite to the first cover protruding portion  512   a.    
     A holder coupling protrusion  516   a  may protrude from both surfaces of the boss portion  516 , namely, both surfaces facing the raised portion  511   a  and the opening  511   b . The holder coupling protrusion  516   a  may be insertedly coupled to a cover insertion hole  556  of the holder  550 . In one embodiment, the holder coupling protrusion  516   a  may be snap-fitted to the cover insertion hole  556 . 
     In the illustrated embodiment, each of the surfaces may be provided with two holder coupling protrusions  516   a , respectively. The holder coupling protrusions  516   a  may be disposed to be spaced apart from each other by a predetermined distance. A position and number of the holder coupling protrusion  516   a  may differ according to a position and number of the cover insertion hole  556 . 
     The boss portion  516  may be provided therein with the cable insertion portion  517 . 
     The cable insertion portion  517  is a passage through which the high-voltage cable  20  is inserted into the space portion  514 . The cable insertion portion  517  may be formed in a penetrating manner, so that the space portion  514  and the outside of the cover body portion  511  communicate with each other. 
     The cable insertion portion  517  may accommodate the support plate  530  and the sealing part  540  therein. In one embodiment, the support plate  530  and the sealing part  540  are inserted sequentially, so that one side of the support plate  530  facing the cover  510  is brought into contact with the shielding plate  520  to be supported. 
     A shape and size (or dimensions) of the cable insertion portion  517  may, preferably, be determined according to a shape and size of the support plate  530  and the sealing part  540 . 
     The cable insertion portion  517  may be covered by the holder  550 . That is, the cable insertion portion  517  may be hermetically sealed by the support plate  530 , the sealing part  540 , and the holder  550 . 
     The EMC accommodating portion  518  may accommodate one end of the electric connection portion  410 . As described above, the electric connection portion  410  may extend in the lengthwise direction. Once the EMC filter  400  is coupled to the front housing  300 , the electric connection portion  410  may protrude outside of the front housing  300 . 
     The EMC accommodating portion  518  is a space through which one end of the electric connection portion  410  protruding outward passes. To this end, the EMC accommodating portion  518  may be recessed from the inner surface of the raised portion  511   a  by a predetermined distance. 
     In the illustrated embodiment, the EMC accommodating portion  518  may be configured as a first EMC accommodating portion  518   a  and a second EMC accommodating portion  518   b . A position and number of the EMC accommodating portion  518  may differ according to a position and number of the electric connection portion  410 . 
     The EMC accommodating portion  518  may be aligned with an EMC penetrating portion  528  of the shielding plate  520 . One end of the electric connection portion  410  may be formed through the EMC penetrating portion  528 , so as to be accommodated in the EMC accommodating portion  518 . 
     (2) Description of the Shielding Plate  520   
     The shielding plate  520  may be configured to shield an electrical noise signal generated when the EMC filter  400  is in operation. The motor-operated compressor  10  or any electronic device (not shown) around the motor-operated compressor  10  may not be affected by the electrical noise signal due to the shielding plate  520 . 
     The shielding plate  520  may be provided in the form of absorbing an electrical signal. In addition, the shielding plate  520  may be made of a conductive material. In one embodiment, the shielding plate  520  may be made of a brass material. 
     The shielding plate  520  may be coupled to the cover  510 . The shielding plate  520  may be accommodated in the space portion  514  of the cover  510 . The shielding plate  520  may be disposed to cover the opening portion  511   b . The plate outer circumferential portion  529  of the shielding plate  520  may be in contact with the inner circumferential portion  511   c.    
     The shielding plate  520  may be integrally formed with the cover  510 . In one embodiment, the shielding plate  520  and the cover  510  may be formed by double shot molding. In another embodiment, the shielding plate  520  and the cover  510  may be made by insert injection molding. 
     Accordingly, manufacturing costs and time, etc. may be reduced as compared when the shielding plate  520  and the cover  510  are manufactured separately to be coupled. In addition, this may allow the shielding plate  520  and the cover  510  to be stably coupled to each other. 
     The shielding plate  520  may include a shielding plate body portion  521 , a shielding plate protruding portion  522 , a shielding plate coupling hole  523 , the alignment recess  525 , the EMC penetrating portion  528 , and the plate outer circumferential portion  529 . 
     The shielding plate body portion  521  may define the body of the shielding plate  520 . The shielding plate body portion  521  may be formed in a rectangular plate shape. 
     A bent portion may be formed at one end of the shielding plate body portion  521  facing the holder  550 . The bent portion may come in contact with the support plate  530  inserted into the cable insertion portion  517 . Accordingly, an (allowable) insertion distance of the support plate  530  and the sealing part  540  may be restricted. 
     The shielding plate protruding portion  522  may protrude from an edge of the shielding plate body portion  521 . The shielding plate protruding portion  522  may be aligned with the cover protruding portion  512 . In detail, one surface of the cover protruding portion  512  facing the raised portion  511   a  and another surface at an opposite side are spaced apart from each other by a predetermined distance, thereby forming a space. The shielding plate protruding portion  522  may be inserted into the space. 
     In the illustrated embodiment, three shielding plate protruding portions  522  including a first shielding plate protruding portion  522   a , a second shielding plate protruding portion  522   b , and a third shielding plate protruding portion  522   c  are provided. 
     The shielding plate  520 , which is opposite to the holder  550 , may be provided with the first shielding plate protruding portion  522   a  protruding from its one end portion in the lengthwise direction. The second shielding plate protruding portion  522   b  and the third shielding plate protruding portion  522   c  may protrude from both corners of the shielding plate  520  in the widthwise direction, respectively. The shielding plate protruding portion  522  may have a semi-circular shape with a rounded end. 
     A position, shape, and number of the shielding plate protruding portion  522  may differ according to a position, shape, and number of the cover protruding portion  512 . 
     The shielding plate protruding portion  522  may be provided with the shielding plate coupling hole  523 . A coupling member (not shown) may be coupled to the shielding plate coupling hole  523  in a penetrating manner. The shielding plate coupling hole  523  may be formed through the shielding plate protruding portion  522 . 
     The shielding plate coupling hole  523  may be aligned with the cover coupling hole  513 . In one embodiment, the shielding plate coupling hole  523  and the cover coupling hole  513  may be disposed to have a same central axis. 
     In the illustrated embodiment, the shielding plate coupling hole  523  may include a first shielding plate coupling hole  523   a , a second shielding plate coupling hole  523   b , and a third shielding plate coupling hole  523   c . Each of the shielding plate coupling holes  523   a ,  523   b ,  523   c  may be provided at the shielding plate protruding portions  522   a ,  522   b ,  522   c , respectively. 
     Each of the shielding plate coupling holes  523   a ,  523   b , and  523   c  may be aligned with the cover coupling holes  513   a ,  513   b , and  513   c , respectively. 
     The alignment recess  525  may guide the shielding plate  520 , so that the shielding plate  520  and the cover  510  are coupled to each other at a predetermined position. 
     The alignment recess  525  may be recessed from one surface of the shielding plate  520  by a predetermined distance. A protruding portion may protrude from another surface of the shielding plate  520 , opposite to the one surface, by a recessed distance of the alignment recess  525 . In one embodiment, the recessed distance may be a protruding distance of the raised portion  511   a.    
     The alignment recess  525  may be inserted into the alignment groove  515 . In detail, as the alignment recess  525  is formed in a recessed manner, the protruding portion protruding from the another surface of the shielding plate  520  may be inserted into the alignment groove  515 . 
     In the illustrated embodiment, the alignment recess  525  may include a first alignment recess  525   a  having a bent portion at a lower side thereof and a second alignment recess  525   b  having a linear shape. The first alignment recess  525   a  and the second alignment recess  525   b  may be spaced apart from each other by a predetermined distance. 
     A position, shape, and number of the alignment recess  525  may differ according to a position, shape, and number of the alignment recess  515 . 
     The EMC penetrating portion  528  is a space through which the electric connection portion  410  of the EMC filter  400  passes. One end of the electric connection portion  410  that has passed through the EMC penetrating portion  528  may be accommodated in the EMC accommodating portion  518 . 
     The EMC penetrating portion  528  may be formed through one side of the shielding plate body portion  521 . In detail, the EMC penetrating portion  528  may be formed in a direction toward the first shielding plate protruding portion  522   a.    
     The EMC penetrating portion  528  may be aligned with the EMC accommodating portion  518 . In the illustrated embodiment, the EMC accommodating portion  518  may be formed as two recessed portions. The EMC penetrating portion  528  may be configured such that the first EMC accommodating portion  518   a  and the second EMC accommodating portion  518   b  are exposed to the outside through the EMC penetrating portion  528 . 
     One end of the electric connection portion  410  may pass through the EMC penetrating portion  528  to be accommodated in the EMC accommodating portion  518 . 
     The plate outer circumferential portion  529  may define an outer circumference of the shielding plate body portion  521  and the shielding plate protruding portion  522 . In other words, the plate outer circumferential portion  529  is the outer circumference of the shielding plate  520 . 
     When the shielding plate  520  and the cover  510  are coupled to each other, the plate outer circumferential portion  529  may be brought into contact with the inner circumferential portion  511   c.    
     In one embodiment, the plate outer circumferential portion  529  may be provided with the plate protrusion portion  560  or the uneven portion  570  to be described hereinafter. In the above embodiment, a frictional force between the plate outer circumferential portion  529  and the inner circumferential portion  511   c  may be increased. As a result, a coupling force between the shielding plate  520  and the cover  510  may be increased. 
     In addition, in the above embodiment, a contact area between the plate outer circumferential portion  529  and the inner circumferential portion  511   c  may be increased. Accordingly, even when the cover  510  and the shielding plate  520  are thermally expanded to different degrees, shape deformation may be minimized. Detailed description thereof will be described hereinafter. 
     In one embodiment, the plate outer circumferential portion  529  may have higher roughness than the inner circumferential portion  511   c.    
     This configuration may allow a frictional force between the plate outer circumferential portion  529  and the inner circumferential portion  511   c  to be increased. Accordingly, a coupling force between the shielding plate  520  and the cover  510  may be increased. 
     In order to increase roughness of the plate outer circumferential portion  529 , a plurality of minute-sized grooves may be punched into the plate outer circumferential portion  529 . Alternatively, a plurality of patterns of the teeth of a comb may be formed on the plate outer circumferential portion  529 , thereby increasing the roughness. 
     In addition to the methods described above, other processing or fabrication methods may also be applied to the plate outer circumferential portion  529  to increase the roughness of the plate outer circumferential portion  529 . 
     (3) Description of the Support Plate  530   
     The support plate  530  may support the high-voltage cable  20  inserted into the cover  510 . The support plate  530  may prevent the high-voltage cable  20  from being separated or detached from the high-voltage connector assembly  500 . In addition, the support plate  530  may prevent a position of the high-voltage cable  20  inserted into the cover  510  from being changed arbitrarily. 
     In addition, an electrical noise signal transmitted to the shielding plate  520  may be grounded by the support plate  530 . 
     In other words, the shielding plate  520  may prevent an electrical noise signal generated in the EMC filter  400  from being leaked to the outside. At this time, since the electrical noise signal does not disappear (or dissipate), the electrical noise signal is transmitted to the shielding plate  520 . 
     The support plate  530  may be in electrical contact with the shielding plate  520 , which allows the shielding plate  520  to be grounded. That is, the electrical noise signal transmitted to the shielding plate  520  may be discharged to the outside of the motor-operated compressor  10  through the support plate  530 . 
     The support plate  530  may be insertedly coupled to the cable insertion portion  517  provided at the boss portion  516 . A shape and size of the support plate  530  may, preferably, be determined according to a shape and size of the cable insertion portion  517 . 
     The support plate  530  may include a support plate body portion  531 , a cable through hole  532 , and a guide portion  533 . 
     The support plate body portion  531  may define the body of the support plate  530 . In the illustrated embodiment, the support plate body portion  531  may extend in the widthwise direction, and both edges of the lengthwise direction are rounded. 
     The support plate body portion  531  may have a shape that may be inserted into the cable insertion portion  517  so as to be in electrical contact with the shielding plate  520 . 
     The cable through hole  532  may be formed through the support plate body portion  531 . The high-voltage cable  20  may be coupled to the cable through hole  532  in a penetrating manner. A size and shape of the cable through hole  532  may be determined according to a size and shape of a cross section of the high-voltage cable  20 . 
     In the illustrated embodiment, the cable through hole  532  includes a first cable through hole  532   a  and a second cable through hole  532   b . The first cable through hole  532   a  and the second cable through hole  532   b  may be disposed to be spaced apart from each other by a predetermined distance. 
     The predetermined distance between the first cable through hole  532   a  and the second cable through hole  532   b  may, preferably, be determined according to a distance between the first EMC accommodating portion  518   a  and the second EMC accommodating portion  518   b . In addition, the predetermined distance may, preferably, be determined according to a distance between a first cable insertion hole  542   a  and a second cable insertion hole  542   b  of the sealing part  540 . 
     Preferably, each of the distances between the EMC accommodating portions  518   a  and  518   b , between the cable through holes  532   a  and  532   b , and between the cable insertion holes  542   a  and  542   b  may be equal. 
     In this embodiment, the two-strand (or line) high-voltage cable  20  may go straight without being bent to be electrically connected to an end of the electric connection portion  410 . 
     The guide portion  533  may divide (or arrange) a space for the sealing part  540  and the support plate  530  to be coupled to each other. 
     The guide portion  533  may protrude from an outer circumference of the support plate body portion  531  in a direction toward the sealing part  540  by a predetermined distance. The sealing part  540  may be insertedly coupled to a space inside the support plate body portion  531  divided by the guide portion  533 . 
     (4) Description of the Sealing Part  540   
     The sealing part  540  may block communication between the space portion  514  of the cover  510  and the outside. That is, the sealing part  540  may seal an inner space of the cover  510 , so as to physically separate an inside of the cover  510  from the outside. 
     Accordingly, any foreign matter, except the high-voltage cable  20  or the electric connection portion  410 , may not be introduced into the space portion  514  of the cover  510 . To this end, the sealing part  540  may be configured to surround the high-voltage cable  20  inserted into the cable insertion portion  517 . 
     The sealing part  540  may be partially inserted into the support plate  530 . In detail, the sealing part  540  may be seated in an inner space of the support plate  530  divided by the guide portion  533 . 
     The sealing part  540  may be made of a material that allows deformation of a shape to an extent. In one embodiment, the sealing part  540  may be made of a rubber material. 
     A shape and size of the sealing part  540  may be determined according to a shape and size of the cable insertion portion  517 . In one embodiment, the sealing part  540  may be larger than the cable insertion portion  517 . 
     In the above embodiment, the sealing part  540  may be inserted into the cable insertion portion  517  in a deformed state with a restoring force. In this case, the sealing part  540  may be securely inserted into the cable insertion portion  517 . 
     The sealing part  540  may include a sealing body portion  541 , a cable insertion hole  542  and an insertion hole outer circumferential portion  543 . 
     The sealing body portion  541  may define the body of the sealing part  540 . The sealing body portion  541  may extend in the widthwise direction, and each of corners is cut-off. A shape of the sealing body portion  541  may be a shape that allows the sealing body portion  541  to be coupled to the support plate  530  and to be inserted into the cable insertion portion  517 . 
     The sealing body portion  541  may include a plurality of plate members  541   a . The plurality of plate members  541   a  may be spaced apart from each other by a predetermined distance to be stacked, thereby defining the sealing body portion  541 . The plurality of plate members  541   a  may maintain a stacked state by a connecting member (not shown). 
     As the sealing body portion  541  is formed by the plurality of plate members  541   a , a sealing effect of the space portion  514  may be enhanced. 
     The high-voltage cable  20  may be inserted into the cable insertion hole  542  in a penetrating manner. The cable insertion hole  542  may penetrate in the lengthwise direction. 
     In the illustrated embodiment, the cable insertion hole  542  may include the first cable insertion hole  542   a  and the second cable insertion hole  542   b  spaced apart from each other by a predetermined distance. 
     The predetermined distance may, preferably, be equal to the distance between the EMC accommodating portions  518   a  and  518   b , and the distance between the cable through holes  532   a  and  532   b , as described above. 
     In addition, the predetermined distance between the cable insertion holes  542   a  and  542   b  may, preferably, be equal to a distance between holder through holes  552   a  and  552   b.    
     The insertion hole outer circumferential portion  543  may be configured to surround and support the high-voltage cable  20  inserted into the cable insertion hole  542 . The insertion hole outer circumferential portion  543  may be formed along an outer circumference of the cable insertion hole  542 . In addition, the insertion hole outer circumferential portion  543  may protrude toward the holder  550  by a predetermined distance from one surface of the plate member  541   a  facing the holder  550 . 
     The insertion hole outer circumferential portion  543  may include a first insertion hole outer circumferential portion  543   a  and a second insertion hole outer circumferential portion  543   b . The first insertion hole outer circumferential portion  543   a  may be formed at the first cable insertion hole  542   a . Similarly, the second insertion hole outer circumferential portion  543   b  may be formed at the second cable insertion hole  542   b.    
     Accordingly, when the high-voltage cable  20  is inserted into the respective cable insertion holes  542   a  and  542   b , the high-voltage cable  20  may be covered to be sealed by the respective insertion hole outer circumferential portions  543   a  and  543   b . Thus, communication between the space portion  514  inside the cover  510  and the outside may be blocked. 
     The insertion hole outer circumferential portion  543  may be insertedly coupled to the holder through holes  552   a  and  552   b , respectively. 
     (5) Description of the Holder  550   
     The holder  550  and the cover  510  may be coupled to each other in a detachable manner. In detail, the holder  550  may be coupled to the boss portion  516  of the cover  510 . This configuration may allow the support plate  530  inserted into the cable insertion portion  517  and the sealing part  540  to be securely coupled to the cover  510 . 
     In addition, the holder  550  may be configured to cover the cable insertion portion  517 . The cable insertion portion  517  may be hermetically sealed by the sealing part  540  and the holder  550 . That is, the holder  550  may be configured to seal the inside of the cover  510 . 
     The holder  550  may be made of an insulating material. In one embodiment, the holder  550  may be made of a synthetic resin or the like. 
     The holder  550  may be made of a material that may allow deformation of a shape to an extent. This allows the holder  550  and the cover  510  to be snap-fitted to each other. 
     In the illustrated embodiment, the holder  550  may extend in the widthwise direction. A shape of the holder  550  may differ according to a shape of the boss portion  516 . 
     The holder  550  may include a holder body portion  551 , a holder through hole  552 , a cable support portion  553 , a cover connecting portion  554 , a cover coupling portion  555 , and the cover insertion hole  556 . 
     The holder body portion  551  may define the body of the holder  550 . In the illustrated embodiment, the holder body portion  551  may extend in the widthwise direction, and have a rectangular parallelepiped plate shape with cut-off corners. A shape of the holder body portion  551  may be a shape suitable for shielding the cable insertion portion  517 . 
     A size of the holder body portion  551  may, preferably, be larger than a size of the cable insertion portion  517 . In one embodiment, the size of the holder body portion  551  may be equal to a cross section of the boss portion  516 . 
     The holder body portion  551  may be provided with the cover connecting portion  554  protruding from its both ends in the widthwise direction toward the cover  510  in the lengthwise direction by a predetermined distance. In addition, the cover coupling portion  555  may protrude toward the cover  510  from another both ends, not the both ends, of the holder body portion  551 . 
     The holder through hole  552  may be formed through the holder body  551 . The high-voltage cable  20  may be inserted into the holder through hole  552  in a penetrating manner. 
     In the illustrated embodiment, the holder through hole  552  may include a first holder through hole  552   a  and a second holder through hole  552   b . The first holder through hole  552   a  and the second holder through hole  552   b  may be spaced apart from each other by a predetermined distance. 
     Each of the holder through holes  552   a  and  552   b , each of the cable insertion holes  542   a  and  542   b , and each of the cable through holes  532   a  and  532   b  may be disposed to have a same central axis. In addition, each of the holder through holes  552   a  and  552   b , each of the cable insertion holes  542   a  and  542   b , and each of the cable through holes  532   a  and  532   b  may be disposed to have a same central axis to each of the EMC accommodating portions  518   a  and  518   b.    
     This configuration may allow the high-voltage cable  20  to be in electrical contact with the electric connection portion  410  in a straight manner without being curved or bent. 
     The cable support portion  553  may be configured to support the high-voltage cable  20  inserted into the cable insertion hole  542 . The cable support portion  553  may surround the outer circumference of the cable insertion hole  542 . 
     The cable support portion  553  may protrude from one surface of the holder body portion  551 , which is opposite to the cover  510 , by a predetermined distance. This configuration may allow the high-voltage cable  20  inserted into the cable insertion hole  542  to be stably supported. 
     In the illustrated embodiment, the cable support portion  553  may include a first cable support portion  553   a  and a second cable support portion  553   b . The first cable support portion  553   a  and the second cable support portion  553   b  may be spaced apart from each other by a predetermined distance. 
     As described above, each of the cable support portions  553   a  and  553   b  may be disposed to have the same central axis as each of the holder through holes  552   a  and  552   b , each of the cable insertion holes  542   a  and  542   b , and each of the cable through holes  532   a  and  532   b.    
     The cover connecting portion  554  is a portion to which the holder  550  and the boss portion  516  are coupled. The cover connecting portion  554  may be configured to surround both ends of the boss portion  516  in the widthwise direction. 
     The cover connecting portion  554  may be located at both ends of the holder  550  in the widthwise direction. The cover connecting portion  554  may protrude in a direction toward the cover  510  by a predetermined distance. 
     In the illustrated embodiment, the cover connecting portion  554  may include a first cover connecting portion  554   a  and a second cover connecting portion  554   b . This is because the cover coupling portion  555  is provided at an edge of the holder  550  where the cover connecting portion  554  is not formed. 
     The cover coupling portion  555  is a portion to which the holder  550  and the cover  510  are coupled. The cover insertion hole  556  may be formed through the cover coupling portion  555 , so that the holder coupling protrusion  516   a  of the boss portion  516  is insertedly coupled to the cover coupling portion  555 . 
     The cover coupling portion  555  may protrude toward the cover  510  by a predetermined distance from both edges of the holder body portion  551  where the cover connecting portion  554  is not formed. 
     In the illustrated embodiment, the cover coupling portion  555  may include a first cover coupling portion  555   a  and a second cover coupling portion  555   b . The first cover coupling portion  555   a  and the second cover coupling portion  555   b  may be spaced apart from each other by a predetermined distance. 
     The predetermined distance should be determined according to the distance between the plurality of holder coupling protrusions  516   a.    
     The cover insertion hole  556  may be formed through the cover coupling portion  555 . 
     The cover insertion hole  556  is a portion in which the holder coupling protrusion  516   a  is inserted. In one embodiment, the holder coupling protrusion  516   a  may be snap-fitted to the cover insertion hole  556 . Accordingly, when the cover  510  and the holder  550  are coupled to each other, they are not arbitrarily separated unless an external force is applied. 
     In addition, a separate (or additional) coupling member such as a screw member is not required to couple the cover  510  and the holder  550  to each other. This may allow the cover  510  and the holder  550  to be coupled to each other in an easier manner, thereby simplifying a structure. 
     The cover insertion hole  556  may be formed through the cover coupling portion  555  at a predetermined angle with a lengthwise direction of the cover coupling portion  555 . In one embodiment, the cover insertion hole  556  may be formed through the cover coupling portion  555  perpendicular to the lengthwise direction of the cover coupling portion  555 . 
     A position, shape, and size of the cover insertion hole  556  may be determined according to a position, shape, and size of the holder coupling protrusion  516   a.    
     In the illustrated embodiment, the cover insertion hole  556  may include a first cover insertion hole  556   a  and a second cover insertion hole  556   b . The first cover insertion hole  556   a  may be formed through the first cover coupling portion  555   a . Likewise, the second cover insertion hole  556   b  may be formed through the second cover coupling portion  555   b.    
     The holder coupling protrusion  516   a  may be insertedly coupled to the cover insertion holes  556   a  and  556   b , respectively. As described above, the holder coupling protrusion  516   a  may be coupled to the cover insertion holes  556   a  and  556   b , respectively, in a snap-fit manner. 
     (6) Description of the Plate Protrusion Portion  560   
     Referring to  FIGS. 6 and 7 , the high-voltage connector assembly  500  according to embodiments may include the plate protrusion portion (or plate protrusion)  560 . 
     The plate protrusion portion  560  may be configured to increase a surface area of the plate outer circumferential portion  529 . Accordingly, a clearance generated by a difference in the coefficient of thermal expansion between the cover  510  and the shielding plate  520  may be minimized. Further, a coupling force between the cover  510  and the shielding plate  520  may be enhanced. 
     In addition, the plate protrusion portion  560  may be configured to form a surface of the plate outer circumferential portion  529  in a more complicated manner. Accordingly, the coupling force between the cover  510  and the shielding plate  520  may be improved as compared when the surface of the plate outer circumferential portion  529  is formed on a single smooth surface. 
     The plate protrusion portion  560  may allow the shielding plate  520  to stably maintain a shielded state of the opening portion  511   b  of the cover  510 . 
     As a result, water or dust at the outside may not be introduced into the space portion  514  of the cover  510 , so that the high-voltage cable  20  and the electric connection portion  410  are electrically connected in a more stable manner. 
     The plate protrusion portion  560  may be provided in plurality. The plurality of plate protrusion portions  560  may be sequentially disposed to be spaced apart from one another by a predetermined distance along the plate outer circumferential portion  529 . 
     A space formed between the plurality of plate protrusion portions  560  may compensate for an increase in volume caused by thermal expansivity of the cover  510  or the shielding plate  520 . 
     In the illustrated embodiment, the plate protrusion portion  560  may include a first plate protrusion portion  560   a  and a second plate protrusion portion  560   b.    
     The first plate protrusion portion  560   a  may protrude from one surface of the shielding plate body portion  521  by a predetermined distance. The second plate protrusion portion  560   b  may protrude from another surface of the shielding plate body portion  521 , opposite to the one surface, by a predetermined distance. 
     The protruding distances of the first plate protrusion portion  560   a  and the second plate protrusion portion  560   b  may be changed according to a shape of the cover  510 . 
     In detail, the cover  510  may include the first surface  511   d  on which the opening portion  511   b  is formed, and the second surface  511   e  opposite to the first surface  511   d  and spaced apart from the first surface  511   d  by a predetermined distance, so as to surround the space portion  514 . 
     The plate outer circumferential portion  529  may be inserted into a space formed between the first surface  511   d  and the second surface  511   e  to be in contact with the inner circumferential portion  511   c.    
     Here, the first plate protrusion portion  560   a  and the second plate protrusion portion  560   b  may be formed such that the sum of the protruding distances is equal to the predetermined distance between the first surface  511   d  and the second surface  511   e.    
     In one embodiment, the first plate protrusion portion  560   a  and the second plate protrusion portion  560   b  may protrude by the same distance. In the embodiment, since the center of gravity of the shielding plate  520  is located at a central portion of the space, the shielding plate  520  may stably maintain its coupled state. 
     The first plate protrusion portion  560   a  and the second plate protrusion portion  560   b  may include a first protruding surface  561 , a second protruding surface  562 , and a third protruding surface  563 , respectively. 
     The first protruding surface  561  may extend from the plate outer circumferential portion  529  at a predetermined angle with respect to the plate outer circumferential portion  529 . In one embodiment, the first protruding surface  561  may extend perpendicular to the plate outer circumferential portion  529 . 
     The second protruding surface  562  may extend from the first protruding surface  561  at a predetermined angle with respect to the first protruding surface  561 . In one embodiment, the second protruding surface  562  may extend perpendicular to the first protruding surface  561 . Further, the second protruding surface  562  may extend parallel to the plate outer circumferential portion  529 . 
     The third protruding surface  563  may extend from the second protruding surface  562  at a predetermined angle with respect to the second protruding surface  562 . In one embodiment, the third protruding surface  563  may extend perpendicular to the second protruding surface  562 . In addition, the third protruding surface  563  may extend parallel to the first protruding surface  561 . 
     Another side of the second protruding surface  562 , namely, a side opposite to the second protruding surface  562  may extend to the plate outer circumferential portion  529 . 
     The plate protrusion portion  560  may have a shape that may increase the surface area of the plate outer circumferential portion  529  and a contact area with the inner circumferential portion  511   b.    
     (7) Description of the Uneven Portion  570   
     Referring to  FIG. 8 , the high-voltage connector assembly  500  according to an embodiment of the present disclosure may include the uneven portion  570 . 
     The uneven portion  570  may be configured to increase a surface area of the plate outer circumferential portion  529 . Accordingly, a clearance caused by a difference in the coefficient of thermal expansion between the cover  510  and the shielding plate  520  may be minimized. Further, a coupling force between the cover  510  and the shielding plate  520  may be enhanced. 
     In addition, the uneven portion  570  may be configured to form a surface of the plate outer circumferential portion  529  in a more complicated manner. Accordingly, the coupling force between the cover  510  and the shielding plate  520  may be improved as compared when the surface of the plate outer circumferential portion  529  is formed on a single smooth surface. 
     The uneven portion  570  may allow the shielding plate  520  to stably maintain a shielded state of the opening portion  511   b  of the cover  510 . 
     Thus, water or dust at the outside may not be introduced into the space portion  514  of the cover  510 , so that the electrical connection between the high-voltage cable  20  and the electric connection portion  410  may be stably maintained. 
     The uneven portion  570  may be formed at the plate outer circumferential portion  529 . In detail, the uneven portion  570  may be sequentially formed along the plate outer circumferential portion  529 . 
     The uneven portion  570  may include a convex portion  571  and a concave portion  572 . 
     The convex portion  571  may protrude from the plate outer circumferential portion  529  by a predetermined distance. The concave portion  572  may be recessed from the plate outer circumferential portion  529  by a predetermined distance. The convex portion  571  and the concave portion  572  may be alternately formed along the plate outer circumferential portion  529  in a sequential or continuous manner. 
     In the illustrated embodiment, the convex portion  571  and the concave portion  572  may have a semicircular cross section, respectively. The convex portion  571  and the concave portion  572  may have a shape suitable for achieving the above-described aspects. 
     4. Description of Coupling Structure of High-Voltage Connector Assembly  500  and Motor-Operated Compressor  10  According to Embodiment 
     Hereinafter, a coupling structure of the high-voltage connector assembly  500  and the motor-operated compressor  10  according to an embodiment will be described in detail with reference to  FIGS. 9 to 11 . As described above, the high-voltage connector assembly  500  may be coupled to the front housing  300 . 
     In detail, the high-voltage connector assembly  500  may be coupled to the connector coupling portion  330  of the front housing  300 . The filter accommodating portion  340  may be provided at a space surrounded by the connector coupling portion  330  to be recessed by a predetermined distance. 
     First, the EMC filter  400  may be inserted into the filter accommodating portion  340 . The EMC filter  400  accommodated in the filter accommodating portion  340  may be electrically connected to the inverter device (not shown). 
     When the EMC filter  400  is inserted into the filter accommodating portion  340 , one end of the electric connection portion  410  may protrude to the outside. The end of the electric connection portion  410  and the high-voltage cable  20  may be electrically connected to each other. 
     The high-voltage cable  20  may be coupled to the high-voltage connector assembly  500 . In detail, the high-voltage cable  20  may be inserted into the holder through hole  552 , the cable insertion hole  542 , and the cable through hole  532  in order. 
     The high-voltage cable  20  may be inserted into the high-voltage connector assembly  500  until one end thereof reaches the EMC accommodating portion  518 . 
     Although not shown, the one end of the high-voltage cable  20  may be provided with an electrically conductive member made of a conducting material. The electrically conductive member may be electrically connected to the electric connection portion  410 . In one embodiment, the electrically conductive member may have a hollow portion therein so that the electric connection portion  410  is insertedly coupled to be electrically connected. 
     Then, the high-voltage connector assembly  500  may be coupled to the front housing  300 . 
     One end of the electric connection portion  410  may penetrate through the EMC penetrating portion  528 , so as to be accommodated in the EMC accommodating portion  518 . At this time, the electrically conductive member of the high-voltage cable  20  may be positioned at the EMC accommodating portion  518 . Thus, one end of the electric connection portion  410  and the electrically conductive member of the high-voltage cable  20  may be electrically connected to each other. In one embodiment, the electric connection portion  410  may be insertedly coupled to the electrically conductive member to be electrically connected. 
     Then, the high-voltage connector assembly  500  may be coupled to the front housing  300  by a coupling member (not shown). 
     In detail, the coupling member (not shown) may be coupled to the cover coupling holes  513   a ,  513   b , and  513   c , respectively, formed in the cover  510 , and the shielding plate coupling holes  523   a ,  523   b , and  523   c , respectively, formed in the shielding plate  520 . 
     One end of the coupling member (not shown) facing the front housing  300  may be insertedly coupled to a recessed portion (not shown) formed at the connector coupling portion  330 . In one embodiment, the coupling member (not shown) may be configured as a screw member. In addition, a screw thread may be formed on an inner circumferential surface of the recessed portion (not shown). 
     5. Description of Effects of High-Voltage Connector Assembly  500  and Motor-Operated Compressor  10  According to Embodiments 
     The cover  510  and the shielding plate  520  of the high-voltage connector assembly  500  according to the embodiments described herein may be integrally formed. In one embodiment, the cover  510  and the shielding plate  520  may be formed by double shot molding or insert injection molding. 
     Accordingly, manufacturing time and costs may be reduced as compared when manufacturing the cover  510  and the shielding plate  520  separately to be coupled to each other. In addition, a manufacturing process may be simplified as the cover  510  and the shielding plate  520 , which have been produced manually, are integrally formed. 
     Further, the shielding plate  520  may not be moved or shaken while being coupled to the cover  510 . Accordingly, the shielding plate  520  may be maintained at its optimal position for shielding an electrical noise signal generated in the EMC filter  400 , thereby improving an effect of shielding the electrical noise signal. 
     Other components of the high-voltage connector assembly  500 , such as the support plate  530  and the sealing part  540 , are insertedly coupled to the cover  510 . In addition, as the holder  550  is coupled to the cover  510 , the members may be securely inserted. 
     Accordingly, no separate (or additional) coupling member is required to manufacture the high-voltage connector assembly  500 . As a result, the number of members constituting the high-voltage connector assembly  500  may be reduced. In addition, since the coupling member is unnecessary, a clearance (or gap) that might be generated in a coupled area or portion is not created. 
     The cover  510  and the holder  550  may be coupled to each other in a snap-fit manner. That is, no separate coupling member is required to couple the cover  510  and the holder  550  to each other. 
     Thus, the cover  510  and the holder  550  may be coupled to each other in an easier manner. In addition, as the coupling member is excluded, no clearance that might be generated in a coupled portion is not created. Further, the snap-fitting may allow the cover  510  and the holder  550  to be securely coupled to each other, and thus they may not be separated from each other unless an external force is applied. 
     In addition, a decrease in the number of members constituting the high-voltage connector assembly  500  means a decrease in the number of contact points between members. 
     Thus, a clearance that might be generated in a contact area between members may be reduced. In addition, vibration generated when the motor-operated compressor  10  is in operation, vibration or impact between members in contact with each other may be reduced. Accordingly, durability against vibration of the high-voltage connector assembly  500  may be improved. 
     In addition, in one embodiment, the plate outer circumferential portion  529  may have a relatively higher roughness than the inner circumferential portion  511   c  of the cover  510 . 
     Accordingly, a frictional force between the plate outer circumferential portion  529  and the inner circumferential portion  511   c  may be increased, so that the shielding plate  520  and the cover  510  are securely coupled to each other. Therefore, even when the shielding plate  520  and the cover  510  are thermally expanded in different volumes, a distance between the plate outer circumferential portion  529  and the inner circumferential portion  511   c  may be minimized. As a result, a space vulnerable to electric current leakage or water leakage may be minimized. 
     Also, in another embodiment, a plurality of plate protrusion portions  560  may be provided at the plate outer circumferential portion  529 . The plurality of plate protrusion portions  560  may be spaced apart from one another by a predetermined distance along the plate outer circumferential portion  529 . 
     Thus, a contact area between the plate outer circumferential portion  529  and the inner circumferential portion  511   c  may be increased. As a result, a contact force between the shielding plate  520  and the cover  510  may be enhanced, accordingly. 
     In addition, an increase in volume due to thermal expansivity of the cover  510  and the shielding plate  520  is compensated by a space generated when the plurality of plate protrusion portions  560  are spaced apart from one another. 
     As a result, a size of the space created by disposing the cover  510  and the shielding plate  520  to be spaced apart from each other may be minimized. Accordingly, electric current leakage or water leakage that may occur through the space may be minimized. 
     In addition, in another embodiment, the uneven portion  570  may be provided at the plate outer circumferential portion  529 . The uneven portion  570  is formed such that the convex portion  571  and the concave portion  572  are alternately provided, and sequentially formed along the plate outer circumferential portion  529 . 
     Therefore, a contact area between the plate outer circumferential portion  529  and the inner circumferential portion  511   c  may be increased, thereby enhancing a contact force between the shielding plate  520  and the cover  510 . 
     In addition, an increase in volume due to thermal expansivity of the cover  510  and the shielding plate  520  may be compensated by the concave portion  572 . 
     As a result, the size of the space created by disposing the cover  510  and the shielding plate  520  to be spaced apart from each other may be minimized. Accordingly, electric current leakage or water leakage that might occur through the space may be minimized. 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.