Patent Publication Number: US-2023155438-A1

Title: Stator, motor including the same and stator assembling method

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This non-provisional application claims priority under 35 U.S.C. § 119(a) on Patent Application No(s). 110142897 filed in Taiwan on Nov. 18, 2021, the entire contents of which are hereby incorporated by reference. 
     TECHNICAL FIELD 
     The disclosure relates to a stator, more particularly to an internal stator, a motor including the same, and a stator assembling method for the same. 
     BACKGROUND 
     A brushless DC (BLDC) motor is an electric motor powered by a direct current voltage supply and commutated electronically instead of by brushes like in conventional DC motors. It is known that the BLDC motors feature increased torque per power input, increased reliability, lower maintenance requirement, and reduced operational and mechanical noise compared to their brushed counterparts, thus they are widely used in various fields, such as aerospace, national defense, agricultural industry, manufacturing and residential business and people&#39;s livelihood, as a power source in a mechanical-driven operation. 
     To meet market demand, the relevant industries have focused on how to improve the manufacturing process for BLDC motors in recent years. Taking the external-rotor BLDC motor as an example, the external-rotor BLDC motor is commonly used in ceiling fans, its stator is installed on a down rod which is fixed at the ceiling, and the coil wires of the stator need to be electrically connected to cables arranged along the rod for providing electrical current to the stator. To this end, the shaft and the down rod are hollow for accommodating the cables, and the shaft has an opening near the stator core to allow the cables to go out and couple with the coil wires; however, the conventional processes for that is inefficiency. In specific, before coupling the coil wires and the cables, the terminals of coil wires are needed to be properly categorized, trimmed to a proper length, and bundled into leads for connecting to power supply, the parts of the cables coming out of the shaft are needed to be properly arranged and tied for them to connect to the lead wires; then, the lead wires and the respective cables are welded to each other, and then the protection sleeves and cable ties are applied on the lead wires and the cables to achieve a reliable connection. Most of the aforementioned steps can only be implemented manually. Thus, the conventional manufacturing process is costly and time-consuming and difficult to achieve a balance between quality and production yield. 
     SUMMARY 
     One embodiment of the disclosure provides a stator including a stator core and at least one fastener. The stator core includes a lamination, a shaft disposed through the lamination, and at least one insulator disposed on the lamination and configured to be wound with a wire. The fastener is disposed on the at least one insulator. The at least one fastener is configured for the wire to be wound thereon and for fixing at least one cable coming out from the shaft so as to electrically couple the wire and the at least one cable. 
     Another embodiment of the disclosure provides a motor including a rotor and a stator. The stator includes a stator core and at least one fastener. The stator core includes a lamination accommodated in the rotor, a shaft disposed through the lamination and the rotor, and at least one insulator disposed on the lamination and configured to be wound with a wire. The fastener is disposed on the at least one insulator. The at least one fastener is configured for the wire to be wound thereon and for fixing at least one cable coming out from the shaft so as to electrically couple the wire and the at least one cable. 
     Another embodiment of the disclosure provides a stator assembling method including providing a stator core, assembling at least one fastener on at least one insulator of a lamination of the stator core, winding a wire onto the at least one insulator and fixing the wire to the at least one fastener, and fixing at least one cable coming out from a shaft of the stator core to the at least one fastener. 
     According to the stator, the motor, and the stator assembling method as discussed in the above embodiments of the disclosure, the fastener provided on the insulator of the stator can be used for the fixation of both the wire and the cable, thus the parts of the wires, that are from different phases or brought out of the stator core for connection, and the cables are allowed to be automatically fixed together during an automatic stator winding process. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure will become better understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only and thus are not intending to limit the present disclosure and wherein: 
         FIG.  1    is an exploded view of a fan with a motor according to one embodiment of the disclosure; 
         FIG.  2    is an exploded view of the motor in  FIG.  1   ; 
         FIG.  3    is a perspective view of a stator of the motor in  FIG.  2   ; 
         FIG.  4    is an exploded view of the stator in  FIG.  3   ; 
         FIG.  5    is an exploded view of a circuit board with a fastener according to one embodiment of the disclosure; 
         FIG.  6    is a partially enlarged view of the stator of the motor in  FIG.  2   ; 
         FIG.  7    is a flowchart showing steps of assembling the stator according to one embodiment of the disclosure; 
         FIG.  8    is a perspective view of a fastener according to another embodiment of the disclosure; and 
         FIG.  9    is a perspective view of a fastener according to yet another embodiment of the disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Aspects and usages of the disclosure will become apparent from the following detailed descriptions with the accompanying drawings. The inclusion of such details provides a thorough understanding of the disclosure sufficient to enable one skilled in the art to practice the described embodiments but it is for the purpose of illustration only and should not be understood to limit the disclosure. On the contrary, it is intended to cover alternatives, modifications, and equivalents as can be included within the spirit and scope of the described embodiments as defined by the appended claims. To this end, those skilled in the relevant art will recognize and appreciate that many changes can be made to the various aspects of the disclosure described herein, while still obtaining the beneficial results of the present disclosure. It will also be apparent that some of the desired benefits of the present disclosure can be obtained by selecting some of the features of the present disclosure without utilizing other features. 
     It is to be understood that the phraseology and terminology used herein are for the purpose of better understanding the descriptions and should not be regarded as limiting. Unless specified or limited otherwise, the terms “mounted,” “connected,” and variations thereof are used broadly and encompass both direct and indirect mountings and connections. As used herein, the terms “substantially” or “approximately” may describe a slight deviation from a target value, in particular a deviation within the production accuracy and/or within the necessary accuracy, so that an effect as present with the target value is maintained. Unless specified or limited otherwise, the phrase “at least one” as used herein may mean that the quantity of the described element or component is one or more than one but does not necessarily mean that the quantity is only one. The term “and/or” may be used herein to indicate that either or both of two stated possibilities. 
     Some exemplary embodiments of the disclosure will be described in detail below with reference to  FIGS.  1 - 9   , and the details given in the following paragraphs are merely provided for better comprehension of the spirit of the disclosure. 
     Firstly, please see  FIGS.  1 - 2   , one embodiment of the disclosure provides a motor  8  which is applicable to, for example, a fan  9 . The motor  8  is, for example, a brushless DC (BLDC) electric motor. As shown, the motor  8  includes a stator  1  and a rotor  80 . The stator  1  is accommodated in the rotor  80 , thus the stator  1  can be served as an internal stator, and the rotor  80  can be served as an external rotor. The stator  1  has one or more wires  40  wound thereon. The wire  40  can be wound around each of the stator teeth of the stator  1  to form a stator coil (not numbered). The stator coil of the wire  40  is for creating magnetic fields and producing rotation of the rotor  80 . The rotor  80  has a first casing  81  and a second casing  82  which form a housing for accommodating the stator  1 . In such an arrangement, the motor  8  is known as an external-rotor brushless DC (BLDC) motor. In addition, as shown, the stator  1  includes a shaft  12  thereon and penetrating through one side of the rotor  80  (e.g., the first casing  81 ). 
     The fan  9  is, for example, a ceiling fan. As shown, the fan  9  includes a canopy  91 , a down rod  92 , a first cover  93 , a second cover  94 , and a plurality of blades  95 . The canopy  91  is configured to be fixed to ceiling (not shown). One end of the down rod  92  is fixed to the canopy  91 , and the other end of the down rod  92  is fixed to the first cover  93  and connected to the shaft  12  of the motor  8  accommodated within the first cover  93  and the second cover  94 . The shaft  12  and the down rod  92  are both hollow so that at least one cable  50  can be disposed therethrough. As such, one or more cables  50  are allowed to be disposed along the down rod  92  and the shaft  12 . The shaft  12  has a cable outlet  121  for the cables  50 , such that the cables  50  are allowed to go out of the shaft  12  and to be electrically coupled with the wire  40  on the stator  1 , thereby providing electricity to the motor  8 . Note that any cable that is suitable for being electrically connected to the wire  40  can be employed herein, and the number of the cable  50  is exemplary and not intended to limit the disclosure. The wire  40  is made of, for example, copper; however, the wire  40  and its material and size are exemplary and not intended to limit the disclosure. It is also noted that the wire  40  may be depicted in a simplified manner or omitted in the drawings for the purpose of simple illustration. As electric current flows through the wire  40 , a rotating magnetic field is generated to attract magnets  83  on the rotor  80 , thus the rotor  80  is forced to rotate around the shaft  12 . The blades  95  can be directly or indirectly fixed to a proper area (e.g., the second casing  82 ) of the rotor  80  and therefore can be rotated with the rotor  80 . 
     The fan  9  is depicted merely for a better understanding of the disclosure illustrated below but is not to limit the applications of the disclosure; that is, the motor as discussed in the disclosure can be applied to other types of fans. For example, the motor of other embodiments of the disclosure can be used in a recirculation fan or a wind machine. In addition, the rotor  80  is depicted merely for a better understanding of the disclosure as well, thus any modification can be made to the rotor  80  as required. 
     The stator  1  will be described in detail with reference to  FIGS.  3 - 6   . As shown, the stator  1  includes a stator core  10 , a circuit board  20 , and at least one fastener  30 . The circuit board  20 , the fastener  30 , the wire  40 , and the shaft  12  are all disposed on the stator core  10 . 
     Specifically, the stator core  10  includes a lamination  11  which includes a yoke  111 , teeth  113  radially extending outwards from the yoke  111 , and shoes  115  respectively located at distal ends of the teeth  113 . The yoke  111  has a shaft hole  1110  for the installation of the shaft  12 . Any typical silicon steel lamination applicable to a motor can be served as the lamination  11 , and the disclosure is not limited by the shape, size, material, number of sheets, and thickness of the lamination  11 . And the shaft  12  can be fixedly disposed through the shaft hole  1110  of the lamination  11  in any suitable manner. 
     The stator core  10  further includes an insulator assembly  13  which has one or more pieces assembled together. In specific, in this embodiment, the insulator assembly  13  includes at least one insulator: an insulator  131  and an insulator  132 . The insulators  131  and  132  are respectively installed at two opposite sides of the lamination  11  in any suitable manner. The insulators  131  and  132  are able to partially cover the yoke  111 , the teeth  113 , and the shoes  115  of the lamination  11 . To fit the contour of the lamination  11 , the insulators  131  and  132  each have a shape partially fitting the shape of the lamination  1 . Since the insulators  131  and  132  are the same or similar in configuration, only the insulator  131  will be exemplarily described in detail in the following paragraphs. 
     The insulator  131  is made of any suitable insulated material. The insulator  131  includes a yoke  1311 , teeth  1313  radially extending outwards from the yoke  1311 , and shoes  1315  respectively located at distal ends of the teeth  1313 . The yoke  1311  partially covers a surface of the yoke  111  of the lamination  11 . Specifically, the yoke  1311  includes a supporting portion  13111  and an open hole  13112 . The supporting portion  13111  means the solid portion of the yoke  1311  which is stacked on the yoke  111  of the lamination  11 . The supporting portion  13111  is configured to support the circuit board  20 ; in other words, the supporting portion  13111  is used as a support for the installation of the fastener  30 . The open hole  13112  means the hollow portion of the yoke  1311  which exposes the shaft hole  1110  of the yoke  111  of the lamination  11 , thus the supporting portion  13111  will not have interference with the shaft  12 . The teeth  1313  partially cover the teeth  113  of the lamination  11 . Thus, the insulators  131  and  132  are able to prevent the wire  40  from directly contacting the teeth  113  of the lamination  11 . The shoes  1315  partially cover the shoes  115  of the lamination  11 . As such, it is understandable that the configurations of the yoke  1311 , the teeth  1313 , and the shoes  1315  of the insulator  131  are basically partially fitting that of the lamination  11  and therefore can be modified as required. 
     Optionally, the insulator  131  may further include a plurality of holding structures  1317  axially protruding outwards from the outer surface of the insulator  131  and respectively arranged at two opposite ends of at least one of the teeth  113 . The holding structures  1317  are able to hold the shape of the stator coil formed of the wire  40  wound on each tooth  113 , the holding structures  1317  are also able to support or secure the position and shape of the part of the wire  40  that crosses among the teeth  113 , such that the holding structures  1317  are able to secure the required tension of the wire  40  and also able to prevent displacement of wire  40 . 
     The circuit board  20  and the fastener  30  are described in detail below. The circuit board  20  is fixed on the supporting portion  13111  of the insulator  131  in any suitable manner. For example, in this embodiment, the insulator  131  further include a plurality of posts  1319  protruding from the supporting portion  13111 , the circuit board  20  has a plurality of engagement holes  211 , the engagement holes  211  are through holes suitable for the insertions of the posts  1319 . Thus, as the posts  1319  penetrate through the engagement holes  211 , the circuit board  20  then can be firmly fixed on the supporting portion  13111  of the insulator  131  by deforming the posts  1319  by heat. The numbers and locations of both the posts on the insulator and the mating holes can be modified as required as long as the circuit board is firmly fixed in place. 
     The circuit board  20  has an installation surface  21 . The installation surface  21  is, for example, a surface of the circuit board  20  facing away from the insulator  131 . The installation surface  21  is configured to support the fastener  30 . Note that the circuit board  20  may have circuit trace distribution, electrical/non-electrical components arranged on the installation surface  21 , but they are omitted from the drawings for the purpose of simple illustration. The engagement holes  211  penetrate through the installation surface  21 . Optionally, there is at least one recess  212  formed on the installation surface  21 . For example, the circuit board  20  has a plurality of recesses  212  spaced apart from each other by a suitable distance. Each recess  212  is configured for providing an area for the placement of the fastener  30 . In this embodiment, the recesses  212  are respectively arranged adjacent to the teeth  1313  of the insulator  131 . In one embodiment, the recess  212  are respectively located at positions corresponding to areas between the teeth  1313 . 
     Regarding the installation of the fastener  30 , the circuit board  20  further has a plurality of installation holes  213  for receiving part of the fastener  30 . Specifically, the installation hole  213  are arranged at the recesses  212 , as shown, each recess  212  has at least one installation hole  213 . The installation hole  213  is a blind hole or a through hole. The fastener  30  includes a main part  31  having at least one insertion part  311 . The insertion part  311  is configured to be inserted into the installation hole  213  so as to fix the fastener  30  to the circuit board  20 . The insertion part  311  and the installation hole  213  may have an interference fit to achieve a firm installation of the fastener  30 . In some embodiments, the insertion part  311  can be fixed in the installation hole  213  by welding process or using adhesive. Note that the insertion part  311  and installation hole  213  are an example of the fixation of fastener. In other embodiments, the fastener may omit the aforementioned insertion parts and can be directly fixed onto the circuit board via adhesive, welding, screw, or bolt. 
     The fastener  30  may be but is not limited to be a single piece made of any suitable electrically conductive material. In one embodiment, the fastener  30  is able to be electrically connected to the circuit board  20  by the insertion parts  311  inserted into the installation holes  213 . In more detail, the fastener  30  further includes a connecting part  32  and a connecting part  33  which respectively extend outwards from two opposite sides of the main part  31 . The connecting part  32  extends towards the shaft  12  from the main part  31 . Optionally, the connecting part  32  extends towards the cable outlet  121  of the shaft  12 . The connecting part  33  extends towards in a direction away from the shaft  12  and the insulator  131 ; in other words, the connecting part  33  is inclined with respect to the shaft  12  and the insulator  131 . The connecting part  32  is configured for the fixation of the part of the cable  50  coming out from the cable outlet  121  of the shaft  12 . The connecting part  33  is configured for the fixation of the part of the wire  40  used for connection to the cables  50 . As such, the cable  50  and the parts of the wire  40 , that are brought out of different phases of the stator  1 , are able to be electrically coupled to each other via the fastener  30 . 
     In detail, the shaft  12  is hollow and has the cable outlet  121 , thus the cable  50  is allowed to be disposed through the shaft  12  and penetrate through the cable outlet  121  to extend towards and engage with the connecting part  32  of one of the fasteners  30 . Optionally, the connecting part  32  has a through hole  321  configured for the cable  50  to penetrate therethrough, thus, the cable  50  is able to be fixed on the fastener  30  by being disposed through the through hole  321  of the connecting part  32 . Optionally, the part of the cable  50  being penetrating through the through hole  321  can be bent to hook the connecting part  32 . In addition, optionally, to facilitate the fixation of the cable  50  to the fastener  30 , the cable outlet  121  is arranged at the side of the shaft  12  facing towards the circuit board  20 ; in other words, the cable outlet  121  of the shaft  12  is arranged to correspond to the fastener  30 . Thus, the connecting part  32  of the fastener  30  corresponds to the cable outlet  121  of the shaft  12 . 
     The connecting part  33  being inclined and extending away from the shaft  12  and the insulator  131  allows the parts of the wire  40 , that are brought out of different phases of the stator  1 , to be wound thereon. By doing so, the wire  40  can be electrically connected to the cable  50  via the fastener  30 , and the part of the wire  40  being wound on the fastener  30  ensures the required shape and tension of the wire  40 . Optionally, the connecting part  30  may be arranged to correspond to an area between the adjacent teeth  1313  of the insulator  131  so as to facilitate the fixation of the wire  40  onto the fastener  30 . 
     As discussed, the fasteners  3  provide places for the parts of the wires  40  brought from different phases of the stator  1  to electrically couple with the cables  50 . This not only simplifies the coupling of the stator coil (i.e., the wire  40 ) and the power (i.e., the cable  50 ) but also makes it possible to introduce such coupling into an automated production line. The assembling processes of the stator  1  are given below with further reference to  FIG.  7   . 
     Firstly, in step S 01 , a stator core  10  is provided. Before or during step S 01 , the shaft  12  is disposed through the lamination  11  using any suitable automatic machine. Also, before or during step S 01 , the insulator  131  and the insulator  132  are assembled to the lamination  11 . 
     Then, in step S 02 , one or more fasteners  30  are installed on the stator core  10 . In specific, the fasteners  30  are installed on the insulator  131 . More specifically, the fastener  30  is installed on the circuit board  20  by inserting the insertion parts  311  into the installation holes  213  of the circuit board  20 , where the insertion parts  311  and the installation holes  213  can be firmly fixed to each other by the interference fit therebetween, welding process, or suitable adhesive. Since the process involved in installing the fastener  30  is simple, it becomes possible to employ a suitable automatic machine to implement the installation of the fastener  30 . The circuit board  20  can be arranged to the predetermined area of the supporting portion  13111  of the insulator  131  as the posts  1319  of the insulator  131  are inserted into the engagement holes  211 , and then the posts  1319  are deformed so secure the circuit board  20  to the insulator  131 . As such, the circuit board  20  and the fasteners  30  thereon can be installed to the insulator  131  as an assembly. Since the process involved in installing the circuit board  20  is simple, it is possible to employ a suitable automatic machine to implement the installation of the circuit board  20  to the supporting portion  13111  of the insulator  131 . In short, the fastener  30  is fixed to the insulator  131  via the circuit board  20 , and the installations of both the fastener  30  and the circuit board  20  can be imported into an automated production line and therefore implemented automatically. 
     Step S 03  is a stator winding process. During step S 03 , the wire  40  is wound around the teeth of the insulators  131  and  132  to form stator coils. It is known that winding the wire  40  around the insulators  131  and  132  is implementable using any suitable stator winding machine. Parts of the wire  40  will be wound on the fasteners  30  as well during step S 03 . In detail, since the connecting parts  33  of the fasteners  30  allow the wire  40  to be wound thereon, the selected part of the wire  40 , which is brought out of the stator core  10  for connection or being served as a lead wire, is also allowed to be automatically wound on the fasteners  30  during the stator winding process by the stator winding machine. Optionally, after the wire  40  had been wound on the connecting part  33 , the connecting part  33  then can be bent to further secure the position of the wire  40  between the connecting part  30  and the main part  31 . 
     Then, step S 04  is to weld the wire  40  to the fastener  30 . In detail, since the fastener  30  can be served as a predetermined place for the wire  40  to wind on, winding the wire  40  on the connecting part  33  of the fastener  30  as well as welding it on the connecting part  33  are implementable by a typical automatic winding machine and spot welding equipment. Optionally, any later process for further improving the part of the wire  40  being welded on the fastener  30  can be involved. 
     Step S 05  is to weld the cable  50  to the fastener  30 . In detail, part of the cable  50  which comes out of the cable outlet  121  of the shaft  12  can penetrate through the through hole  321  of the connecting part  32  of the fastener  30 . Optionally, the part of the cable  50  disposed through the through hole  321  can be bent to further firmly hook the connecting part  32 . By doing so, the part of the cable  50  being fixed on the fastener  30  can be served as a predetermined place for a suitable automatic spot welding equipment to weld the cable  50  to the connecting part  32 . By the above steps, the wire  40  and the cable  50  are able to be electrically coupled to each other via the fastener  30 . It is noted that the order of the aforementioned steps may be changed as required. For example, in other embodiments, the step S 05  may be performed before the step S 03  and step S 04 . 
     By following the aforementioned steps, the stator  1  is completed and ready to do required basic testing. As the method of the disclosure discussed above, the configuration of the stator  1  allows automatic equipment to get involved to implement the fixation and electrical coupling of the wire routing and cables terminals, thus manually implemented processes (e.g., wire and cable arrangement and bundling and adding protection sleeves and cable ties), are no longer needed; that is, the method of the disclosure prevents the problems due to troublesome and time-consuming works that are heavily relying on manual human labor. Accordingly, the method of assembling the stator  1  significantly saves labor costs and therefore is beneficial to improve efficiency, quality, production yield, and productivity. 
     Herein, please refer table 1 below, the table 1 shows a conventional manufacturing steps for stator. As shown, except for the process of winding wires on stator core which can be automatically implemented in coil winding station, the later processes, such as wires and cable arrangement, trimming, and bundling and adding protection sleeves, heat shrink tubing, and cable ties, can only be implemented manually, where the protection sleeves, heat shrink tubing, and cable ties are provided for securing the connection between the wires and the cables. As a result, the conventional stator manufacturing process highly relies on troublesome and time-consuming manual works and therefore is costly and inefficient. As can be seen below, the conventional stator manufacturing process needs 505 seconds at minimum. And it is known that high relying on human labor inevitably would be difficult to achieve a balance between quality and production yield. 
     
       
         
           
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                 No. 
                 processes 
                 time(second) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 placing shaft into silicon steel 
                 40 
               
               
                   
                 sheet and installing insulator 
               
               
                 2 
                 winding the stator core 
                 135 
               
               
                 3 
                 trimming and arranging wires 
                 25 
               
               
                 4 
                 bundling wires for lead wire 
                 40 
               
               
                 5 
                 arranging cables 
                 5 
               
               
                 6 
                 sleeving the cables with 
                 20 
               
               
                   
                 protection sleeves 
               
               
                 7 
                 bundling cables and lead wires 
                 80 
               
               
                 8 
                 welding lead wires and cables 
                 50 
               
               
                 9 
                 wires and cable arrangement 
                 30 
               
               
                 10 
                 sleeving heat shrink tubing 
                 10 
               
               
                 11 
                 adding cable ties on cables 
                 10 
               
               
                 12 
                 electrical testing 
                 60 
               
            
           
           
               
               
            
               
                 total time 
                 505 
               
               
                   
               
            
           
         
       
     
     Then, please see table 2 below, the table 2 shows the assembling method of the aforementioned embodiments of the disclosure. As shown, with the fastener, the fixations of the wires and the cables can be automatically completed during the winding process and which enables the import of automatic welding process for the lead wires. The fastener also allows the ends of the cables to be arranged and welded at specific places so that they are able to be automatically coupled to the wires. As such, the arrangement and connection of the cables and the wires can be implemented using automatic machines and thus avoiding troublesome and time-consuming manual works, such as arranging and bundling wires and cable and adding protection sleeves, heat shrink tubing, and cable ties. As can be seen below, due to the fastener as discussed in the embodiments of the disclosure, the stator manufacturing steps are reduced and simplified (12 steps to 7 steps) and can be implemented by automatic equipment, thus the total time is shortened to about 313 seconds. As a result, most of the conventional manual processes are replaced by automatic processes contributed by the fastener of the disclosure, thereby significantly saving labor costs and achieving a great improvement in efficiency, quality, production yield, and productivity. 
     
       
         
           
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
               
                 No. 
                 processes 
                 time(second) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
            
               
                 1 
                 steps S01-S02: installing shaft and 
                 60 
               
               
                   
                 installing insulators and fasteners 
               
               
                 2 
                 step S03: winding the stator core 
                 120 
               
               
                 3 
                 step S04: automatically welding 
                 40 
               
               
                   
                 wires to fastener 
               
               
                 4 
                 trimming and arranging wires 
                 8 
               
               
                 5 
                 arranging cables along shaft 
                 5 
               
               
                 6 
                 step S05: automatically welding 
                 40 
               
               
                   
                 cables to fastener 
               
               
                 7 
                 electrical testing 
                 40 
               
            
           
           
               
               
            
               
                 total time 
                 313 
               
               
                   
               
            
           
         
       
     
     In addition, as discussed above, while the wires  40  are automatically wound on the fasteners  30 , the holding structures  1317  of the insulator  131  are able to support or secure the position and shape of the stator coil formed of the wire  40  and the parts of the wire  40  that crosses between different teeth  113 , such that the holding structures  1317  are able to secure the required tension of the wire  40  and also to prevent displacement of wire  40 , thereby assisting in improving performance of the motor  8  in various aspects, such as high inductance and low vibration. 
     It is noted that the aforementioned fasteners are exemplary but not limiting. Please refer to  FIG.  8   , another embodiment of the disclosure provides a fastener  30 ′, the difference between the fastener  30 ′ and the previous fastener  30  is that a connecting part  32 ′ of the fastener  30 ′ has a notch  322  and two press tabs  323  thereon, the notch  322  is formed on the upper surface of the connecting part  32 ′, the press tabs  323  are located at two opposite sides of the distal end of the connecting part  32 ′. The cable  50  can be temporarily disposed in the notch  322 , then the press tabs  323  can be folded inwards to secure the position of the cable  50  on the connecting part  32 ′. In addition, the fastener  30 ′ has an extension part  331  located at the distal end of a connecting part  33 ′ thereof, and the angle of the extension part  331  makes it possible to prevent the wire  40  from loosening from the connecting part  33 ′. 
     Please refer to  FIG.  9   , another embodiment of the disclosure provides a fastener  30 ″, the difference between the fastener  30 ″ and the previous fasteners is that the fastener  30 ″ has a positioning recess  332  arranged on a connecting part  33 ″ for facilitating the winding of the wire  40  onto the fastener  30 ″. In specific, the wire  40  is prevented from slipping as it is restricted by the positioning recess  332 . 
     It is noted that the circuit board between the fasteners and the insulator is optional but not limiting. For example, in a stator of other embodiments of the disclosure, the fastener may be directly disposed on the insulator in any suitable manner as long as the fastener enables the fixations of the wire and cable as well as the electrical connection between the wire and the cable. In addition, the number of the fastener on one stator may be modified as required; for example, in a stator core of other embodiments of the disclosure, there may be only one fastener arranged on the stator core. 
     According to the stator, the motor, and the stator assembling method as discussed in the above embodiments of the disclosure, the fastener provided on the insulator of the stator can be used for the fixation of both the wire and the cable, thus the parts of the wires, that are from different phases or brought out of the stator core for connection, and the cables are allowed to be automatically fixed together during an automatic stator winding process, avoiding manually arranging and bundling wires and cables. Also, since the wires and the cable can be automatically fixed to the fastener, the wires and the cables can be automatically welded to build a reliable connection without the need of protection sleeve or cable tie. As such, the fastener as discussed above makes the fixation and electrical coupling of the cable and wire possible to be automatically performed, thus the conventional manual processes, such as wire and cable arrangement, bundling, welding, adding protection sleeve and cable tie, all can be replaced by automatic processes contributed by the fastener, thereby significantly saving labor costs while achieving a great improvement in efficiency, quality, production yield, and productivity. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure. It is intended that the specification and examples be considered as exemplary embodiments only, with a scope of the disclosure being indicated by the following claims and their equivalents.