Source: https://patents.google.com/patent/JP4277547B2/en
Timestamp: 2020-04-02 16:31:03
Document Index: 454273225

Matched Legal Cases: ['art 3', 'art 2', 'art 82', 'art 2', 'art 82', 'art 3', 'arts 82', 'art 3', 'art 4', 'art 3', 'art 81', 'arts 201', 'arts 201', 'art 2', 'art 3']

JP4277547B2 - Insulating paper for electric motors and electric motors - Google Patents
Insulating paper for electric motors and electric motors Download PDF
JP4277547B2
JP4277547B2 JP2003078641A JP2003078641A JP4277547B2 JP 4277547 B2 JP4277547 B2 JP 4277547B2 JP 2003078641 A JP2003078641 A JP 2003078641A JP 2003078641 A JP2003078641 A JP 2003078641A JP 4277547 B2 JP4277547 B2 JP 4277547B2
JP2003078641A
JP2004289930A (en
英明 木村
徹 畔柳
2003-03-20 Application filed by アイシン・エィ・ダブリュ株式会社 filed Critical アイシン・エィ・ダブリュ株式会社
2003-03-20 Priority to JP2003078641A priority Critical patent/JP4277547B2/en
2004-10-14 Publication of JP2004289930A publication Critical patent/JP2004289930A/en
2009-06-10 Publication of JP4277547B2 publication Critical patent/JP4277547B2/en
The present invention relates to an insulating paper for a motor for improving electrical insulation in a portion adjacent to a single pole coil in a motor with a distributed winding structure, and an electric motor using the same to improve electrical insulation.
One type of electric motor is one with a distributed winding structure. This is because when a plurality of single-pole coils belonging to a multi-phase coil group are arranged on the stator core, a part of the coil end portions protruding from both end faces of the stator core overlap each other with different phases. The thing of the structure which has.
Here, the single-pole coil refers to one unit coil constituted by winding an electric wire a plurality of times so as to form one loop. And a coil group of each phase can be constituted by connecting a plurality of single pole coils electrically. Hereinafter, the “single-pole coil” in this specification has the same meaning as described above.
The electric motor with this distributed winding structure is designed to provide electrical insulation between the stator core and the insertion portion accommodated in the stator core slot in each single-pole coil, as well as electrical insulation between coil ends having different phases, that is, interphase insulation. It is necessary to plan.
Conventionally, as shown in FIGS. 15 and 16, the electrical insulation between the single-pole coil 8 and the stator core 5 is a slot insulation bent in a substantially U-shaped cross section along the inner wall surface 51 of the slot 50. This is done by loading paper 91 (FIG. 15) into the slot 50.
Further, the slot insulating paper 91 is provided with a cuff portion 915 that protrudes from the slot 50 and is folded back toward the end surface of the stator core 5, so that the distance between the coil end portion 82 and the end surface of the stator core 5, the so-called creepage distance, is provided. Secured.
As a conventional slot insulating paper, for example, there is one disclosed in Patent Document 1.
In addition, as shown in FIGS. 17 and 18, the interphase insulation includes, for example, a U-phase single-pole coil 8 (U), a V-phase single-pole coil 8 (V), and a W-phase single-pole coil 8 (W). When the coil end portions 82 are partially overlapped with each other, strip-shaped interphase insulating paper 92 (FIG. 17) is interposed between the U phase and the V phase and between the V phase and the W phase. Is done. Patent Document 2 proposes interphase insulating paper in which a pair of interphase insulating papers arranged on both surfaces of a stator core are connected by a string-like connecting portion.
Japanese Patent Laid-Open No. 11-266557
Japanese Patent Laid-Open No. 5-292893
However, the conventional insulating structure using slot insulating paper and interphase insulating paper has the following problems.
That is, in the combination of the slot insulating paper and the interphase insulating paper, there may be a gap between them, and it is difficult to improve the insulation of the coil facing the gap. In addition, the interphase insulating paper is prone to misalignment and stable when performing a lacing process for fixing a plurality of coil end parts to a predetermined shape and a molding process for adjusting the shape of the coil end parts. Interphase insulation may not be obtained. In order to prevent misalignment of the interphase insulating paper, there is a method in which a pair of interphase insulating paper is connected by a string-like connecting portion as in the conventional example. In this method, the connecting portion needs to be accommodated in a slot of the stator core. This may interfere with coil insertion or reduce the space factor.
The present invention has been made in view of such conventional problems, and without affecting the insertability and space factor of the coil, the electrical insulation between the coil and the stator core, and the coil ends having different phases. It is an object of the present invention to provide an insulating paper for an electric motor that can improve both the electrical insulation between the parts, and an electric motor using the same.
1st invention is the insulating paper for motors for improving the electrical insulation in the part which the single pole coil arrange | positioned at a stator core adjoins,
At least two slot cell portions arranged in two slots of the stator core that accommodates two insertion portions of one single-pole coil, and both ends of the two slot cell portions are connected to form a loop. And two inter-phase insulating portions arranged so as to face the coil end portion of the single-pole coil.And
The motor insulating paper is configured to be used by cutting and bending a part of a reference sheet having electrical insulation,
The insulating sheet for an electric motor has the substantially rectangular outer shape surrounded by a pair of vertical outlines arranged substantially in parallel and a pair of horizontal outlines arranged substantially perpendicular to the vertical outline. It is configured to be used by cutting and bending a part of
At least the reference sheet includes two first cutting lines provided substantially parallel to the vertical outline,
Two second lines provided substantially parallel to the lateral outline so as to connect the two first cutting lines so that a substantially rectangular central opening is formed between the two first cutting lines. 2 cutting lines,
A total of four third cutting lines provided from both ends of each of the first cutting lines in a direction opposite to the direction in which the central opening exists, substantially parallel to the lateral outline;
In a portion closer to the horizontal outline than the central opening, a total of four fourth cutting lines provided substantially parallel to the horizontal outline from the pair of vertical outlines to the inside. And
The first cutting line adjacent to the inner piece part sandwiched between the pair of third cutting lines facing substantially parallel to each other and the outer piece part sandwiched between the pair of fourth cutting lines facing substantially parallel to each other And at least two slot cell portions having a substantially U-shaped cross section by being bent so as to be close to the vertical outer shape line, and sandwiched between the third cutting line portion and the horizontal outer shape line Is configured to be the interphase insulating part.Insulating paper for electric motors characterized in that (claim 1).
As described above, the insulating paper for an electric motor of the present invention integrally includes two slot cell portions for slots into which at least one single-pole coil is inserted, and two interphase insulating portions arranged so as to connect them. Have. The slot cell portion serves as an insulating paper that electrically insulates the slot inner peripheral surface of the stator core and the single-pole coil. Therefore, when this insulating paper for an electric motor is attached to the slot of the stator core and the single-pole coil is attached to the stator core, the two insertion portions of the single-pole coil can be covered with the two slot cell portions. , The entire length of the coil end portion formed so as to connect the two insertion portions can be reliably faced to the interphase insulating portion. Further, the integration of the slot cell portion and the interphase insulating portion can prevent the facing state between the interphase insulating portion and the coil end portion from shifting. Therefore, not only the electrical insulation between the single-pole coil and the stator core, but also the electrical insulation between the coil ends with different phases arranged with the inter-phase insulation portion interposed therebetween can be reliably improved.
The two interphase insulating portions are connected by the slot cell portion. Therefore, it is not necessary to insert extra parts other than the slot cell portion into the stator core slot, and the insertability of the coil and the space factor are not reduced.
Therefore, according to the present invention, the electrical insulation between the coil and the stator core and the electrical insulation between the coil end portions having different phases can be obtained without affecting the insertion property and space factor of the coil. The insulating paper for electric motors which can improve both can be provided.
According to a second aspect of the present invention, a plurality of single-pole coils are disposed on the stator core, and part of the coil end portions of the single-pole coil protruding from both end faces of the stator core overlap each other with different phases. In a distributed winding motor arranged in
The stator core is provided with an insulating paper for an electric motor that enhances electrical insulation in a portion where the monopolar coil is adjacent to the stator core,
At least a part of the insulating paper for an electric motor is made of the insulating paper for an electric motor according to the first aspect of the invention, and is disposed in at least two slots of the stator core that accommodates two insertion portions of the single unipolar coil. Two slot cell portions, and two interphase insulating portions arranged so as to connect both ends of the two slot cell portions to form a loop and to face the coil end portion of the single-pole coil, The electric motor is characterized in that the interphase insulating portion is disposed between the adjacent coil end portions having different phases.Claim 11).
In the electric motor of the present invention, the insulating paper for electric motors of the first invention is used as at least a part of the insulating paper for electric motors. Therefore, as described above, both the electrical insulation between the coil and the stator core and the electrical insulation between the coil end portions having different phases can be achieved without affecting the insertion property and space factor of the coil. An improved structure can be taken. Therefore, the electric motor of the present invention is excellent in energy efficiency and high performance.
As the insulating paper for electric motors in the first invention, various materials can be applied as long as they are sheet-like materials having electrical insulating properties. As a specific material, for example, a composite sheet having a three-layer structure in which two heat-resistant sheets made of polyamide resin as a raw material are joined with an adhesive can be used. More specifically, a three-layer composite sheet bonded with PEN (polyethylene naphthalate) sandwiched between two sheets of NOMEX (heat-resistant polyamide paper) is the product name NPN-333 (manufactured by Nitto Shinko Corporation). It is commercially available and can be used. The NOMEX is made of heat-resistant polyamide resin fibers, so-called Kepler fibers, and the gap between the fibers is filled with the PEN to ensure electrical insulation.
The electric motor insulating paper may be formed from a single sheet, or may be integrated by bonding a plurality of sheets. In this case, the bonding of the plurality of sheets can be performed using an adhesive, or can be performed by ultrasonic bonding or the like without using an adhesive.
In addition, one or a plurality of loop-shaped unit shapes composed of the two slot cell portions and the two interphase insulating portions are arranged in the extending direction of the interphase insulating portion, and the extended portions of the interphase insulating portions are connected. It is preferable that the plurality of unit coils are integrated so as to achieve electrical insulation.
That is, the above-described excellent effect can be obtained even with an insulating paper for a motor having only one loop-shaped unit shape composed of the two slot cell portions and the two interphase insulating portions. It is possible to cope with pole coils, but when two or more of the above unit shapes are integrated, it is possible to deal with a plurality of single pole coils with one sheet of insulating paper for the motor. It is also possible to reduce the number of sheets of insulating paper.
Further, the interphase insulating portion has an overlap margin portion provided by extending both ends, and each of the adjacent insulating papers for the motor when the plural insulating papers for the motor are attached to the stator core. It is preferable that the overlapping margin portions are configured to be overlapped (claim 3). In this case, the interphase insulating part of the insulating paper for electric motor can be arranged in a ring shape along the entire circumference of the stator core, and the effect of interphase insulation can be further enhanced.
Further, it is preferable that the interphase insulating portion is configured so as to be able to form a three-dimensional shape that faces the coil end portion and wraps part or all of it. In this case, the effect of interphase insulation between coil end portions having different phases can be further enhanced.
The insulating paper for an electric motor is configured to be used by cutting and bending a part of a reference sheet having electric insulation..In this case, the insulating paper for an electric motor can be produced relatively easily.
Here, as the reference sheet, for example, as described above, a composite sheet having a three-layer structure in which two heat-resistant sheets made of polyamide resin as a raw material are bonded with an adhesive can be used.
Further, the reference sheet is preferably provided with a reinforcing portion in which a reinforcing sheet is partially pasted to increase the thickness (Claim 5). In this case, it is possible to reinforce only a specific portion without increasing the thickness of the insulating paper for the motor more than necessary. For this reason, for example, it is possible to reinforce a necessary portion while keeping the slot cell portion thin and maintaining the line product ratio in the slot.
As the reinforcing sheet, an insulating sheet similar to the reference sheet can be applied. Further, the reinforcing sheet and the reference sheet can be joined by using an adhesive, or by ultrasonic joining without using an adhesive.
In addition, the motor insulating paper is constructed using a substantially rectangular reference sheet as follows..
That is, a part of a reference sheet having a substantially rectangular outer shape surrounded by a pair of vertical outlines arranged substantially in parallel and a pair of horizontal outlines arranged substantially perpendicular to the vertical outline is cut. And at least the reference sheet is formed between two first cutting lines provided substantially parallel to the vertical outline and between the two first cutting lines. Two second cutting lines provided substantially parallel to the horizontal outline so as to connect the two first cutting lines so as to form a substantially rectangular central opening, and the first cutting lines. A total of four third cutting lines provided in opposite directions to the direction in which the central opening exists, substantially parallel to the horizontal outline from both ends, and closer to the horizontal outline than the central opening Is substantially parallel to the horizontal outline from the pair of vertical outlines inward. A total of four fourth cutting lines provided, an inner piece portion sandwiched between a pair of the third cutting lines facing substantially parallel to each other, and a pair of the fourth cutting lines facing substantially parallel to each other At least two slot cell portions having a substantially U-shaped cross section can be formed by bending an outer piece portion sandwiched between lines so that the adjacent first cutting line and the vertical outer shape line are close to each other; and The portion sandwiched between the third cutting line portion and the horizontal outline is configured to be the interphase insulating portion..
In this case, by using the reference sheet, it is possible to relatively easily produce an insulating paper for an electric motor that integrally includes at least two slot cell portions and two interphase insulating portions. Note that, as the reference sheet, not only a sheet formed by only one sheet but also a sheet formed by joining a plurality of sheet pieces can be used. When a plurality of sheet pieces are joined and used, for example, the portion corresponding to the slot cell portion and the portion corresponding to the interphase insulating portion can be made of materials having different thicknesses and materials.
Further, a fifth cutting line having a predetermined length provided substantially parallel to the first cutting line is connected to the third cutting line, and the fifth cutting line and the first cutting line are connected to each other. It is preferable that the cuff portion that protrudes from the slot of the stator core and is folded back toward the end surface of the stator core can be formed by folding back the portion sandwiched therebetween in a direction away from the third cutting line. (Claim 6). In this case, a sufficient distance between the coil end portion and the end face of the stator core can be secured by forming the cuff portion.
In addition, a cuff part can be formed on the end part of the inner piece part facing the third cutting line by attaching a separately prepared reinforcing paper for cuffs so that it is thicker than other parts and is not folded back. It is also preferable to be configured as (Claim 7). In this case, the rigidity of the cuff part can be increased, and the cuff part can be prevented from falling.
The second cutting line and the third cutting line are preferably provided on the same line (Claim 8). In this case, the second cutting line and the third cutting line can be easily formed, and the production of the insulating paper for the motor can be simplified.
Further, the second cutting line and the third cutting line are arranged such that the interval between the two second cutting lines is wider than the interval between the two third cutting lines, and In addition, a sixth cutting line facing the third cutting line is provided on the extension of the second cutting line, and a portion sandwiched between the third cutting line and the sixth cutting line is described above. By being bent in the same direction as the inner piece portion, it is configured to be able to form a rising covering portion that covers the coil end portion of the monopolar coil in the vicinity of the boundary portion between the slot cell portion and the interphase insulating portion. Is also preferable (Claim 9). In this case, the effect of interphase insulation can be further enhanced by forming the rising coating portion.
The second cutting line and the third cutting line are arranged such that the interval between the two second cutting lines is smaller than the interval between the two third cutting lines. A lower surface covering portion is formed to cover a portion of the coil end portion of the single-pole coil facing the stator core by bending a portion having the second cutting line as an end portion so as to approach the horizontal outline. It is also preferable that it is configured (Claim 10). In this case, the effect of interphase insulation can be further enhanced by forming the lower surface covering portion.
An insulating paper for an electric motor and an electric motor according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the insulating paper 1 for an electric motor of this example is electrically insulative in a portion where a single-pole coil 8 (FIGS. 3 to 8) disposed on a stator core 5 (FIG. 3) is adjacent. It is an insulating paper for electric motors for enhancing the resistance.
At least two slot cell portions 2 arranged in two slots of the stator core that accommodates two insertion portions 81 of one single-pole coil 8 and loops that connect both ends of the two slot cell portions 2 respectively. Are integrally formed with two interphase insulating portions 3 disposed so as to face the coil end portion 82 of the single-pole coil 8.
As shown in FIGS. 1 and 2, the insulating paper 1 for an electric motor of this example is configured to be used by cutting and bending a part of a reference sheet 10 having electrical insulation. As the reference sheet 10, a product name NPN-333 (Nitto Shinko Co., Ltd.), which is a three-layer composite sheet in which two heat-resistant sheets (NOMEX) made of polyamide resin as raw materials are bonded with PEN (polyethylene naphthalate) sandwiched therebetween. Made). A thickness of 0.25 mm was used.
As shown in FIG. 2, the reference sheet 10 includes a pair of vertical outlines 101 and 102 arranged substantially in parallel and a pair of horizontal outlines 103 and 104 arranged substantially perpendicular to the vertical outlines 101 and 102. The one having a substantially rectangular outer shape enclosed was used.
The reference sheet 10 includes two first cutting lines 111 and 112 provided substantially parallel to the vertical outlines 101 and 102, and a substantially rectangular center between the two first cutting lines 111 and 112. And having two second cutting lines 121 and 122 provided substantially parallel to the horizontal outlines 103 and 104 so as to connect the two first cutting lines 111 and 112 so that the opening 19 is formed. Yes.
In addition, the reference sheet 10 includes a total of four sheets provided from both ends of the first cutting lines 111 and 112 in a direction opposite to the direction in which the central opening 19 exists, substantially parallel to the horizontal outlines 103 and 104, respectively. It has the 3rd cutting lines 131-134. In this example, the second cutting lines 121 and 122 and the third cutting lines 131 to 134 are provided on the same line.
Further, the reference sheet 10 is provided substantially parallel to the horizontal outlines 103 and 104 inwardly from the pair of vertical outlines 101 and 102 at a portion closer to the horizontal outlines 103 and 104 than the central opening 19. In addition, a total of four fourth cutting lines 141 to 144 are provided.
As shown in FIGS. 1 and 2, the inner piece portions 201 and 202 sandwiched between a pair of third cutting lines 131 and 133 or 132 and 134 facing substantially parallel to each other and a pair of fourth fourth facing each other substantially parallel to each other. By bending the outer pieces 203 and 204 sandwiched between the cutting lines 141 and 143 or 142 and 144 so that the adjacent first cutting lines and the vertical outlines (111 and 101 or 112 and 102) approach each other, At least two slot cell portions 2 having a substantially U-shaped cross section can be formed, and a portion sandwiched between the third cutting line portions 131 to 134 and the horizontal outer shape lines 103 and 104 becomes the interphase insulating portion 3. It is configured.
Further, as shown in FIGS. 1 and 2, in this example, the third cutting lines 131 to 134 include fifth cutting lines 151 to 151 having a predetermined length provided substantially parallel to the first cutting lines 111 and 112. 154 are connected to each other, and by folding portions 401 to 404 sandwiched between the fifth cutting lines 151 to 154 and the first cutting lines 111 and 112 in a direction away from the third cutting lines 131 to 134, The cuff portion 4 is formed so as to protrude from the slot 50 of the stator core 5 and be turned back toward the end surface of the stator core 5.
As shown in FIGS. 1 and 2, the interphase insulating portion 3 has an overlap margin portion 35 provided with both ends extended, and when the plurality of insulating papers 1 for motors are attached to the stator core 5. Each of the overlapping margins 35 in the adjacent insulating paper for electric motor 1 can be overlapped.
Note that the broken line a in FIG. 2 indicates a portion corresponding to a valley when bent, and the broken line b indicates a portion corresponding to a peak when bent.
Next, an example of an electric motor using the electric motor insulating paper 1 having the above configuration will be described.
As shown in FIG. 3, the electric motor of this example has a ring-shaped stator core 5 provided with a large number of slots 50 on the inner peripheral side, and a three-phase single-pole coil 8 (U, V) having different phases. , W), and a motor having a distributed winding structure in which some of these coil end portions are arranged so as to overlap each other with different phases.
The stator core 5 is provided with an insulating paper for an electric motor that enhances electrical insulation in a portion where the single-pole coil 8 is adjacent, that is, a portion where the inner wall surface of the slot 50 and the coil end portions having different phases overlap.
In this example, the insulating paper 1 for an electric motor having the above-described configuration is employed in a portion corresponding to the slot 50 into which the V-phase and W-phase coils are inserted, and the U-phase is disposed only in the slot 50 similar to the conventional one. Slot insulating paper 91 (see FIG. 15) was employed.
This structure will be described along the order in which the single-pole coils 8 are arranged.
First, as shown in FIG. 4, a slot insulating paper 91 similar to the conventional one is installed in each slot 50 into which the insertion portion 81 of the U-phase single-pole coil 8 (U) in the stator core 5 is inserted, and the above-mentioned slot insulating paper 91 is inserted therein A U-phase single-pole coil 8 (U) is inserted and arranged. At this point, there are no coils with different phases.
Next, as shown in FIG. 5, the slot cell portions 2 of the motor insulating paper 1 having the above-described configuration are inserted and disposed in the two slots 50 of the stator core 5 that accommodates the two insertion portions of each V-phase single-pole coil. . That is, a plurality of V-phase motor insulating papers 1 are inserted and arranged corresponding to a plurality of single-pole coils 8 (V). In addition, the overlapping margins 35 of the insulating papers 1 for each motor are overlapped, and the interphase insulating part 3 is arranged in a ring shape along the entire circumference of the stator core 5. As a result, as shown in the figure, the coil end portion 82 of the U-phase single-pole coil 8 (U) entirely faces the interphase insulating portion 3 of the V-phase motor insulating paper 1, and the inner circumference Covered from the surface side. Moreover, as shown in FIG. 1, the slot cell part 2 arrange | positioned at each slot 50 will be in the state bent by the cross-sectional substantially U shape.
Next, as shown in FIG. 6, the insertion portion 81 of the V-phase single-pole coil 8 is inserted into the slot 50 in which the slot cell portion 2 of the insulating paper 1 for the V-phase motor is mounted. A single-pole coil 8 (V) is disposed on the stator core 5. At this time, as described above, due to the presence of the interphase insulating portion 3 of the V-phase motor insulating paper 1, the coil end portion 82 of the V-phase single-pole coil 8 (V) becomes the previously mounted U-phase. It arrange | positions, without contacting with the coil end part 82 of the monopolar coil 8 (U).
Next, as shown in FIG. 7, the slot cell portions 2 of the motor insulating paper 1 having the above-described configuration are inserted and disposed in the two slots 50 of the stator core 5 that accommodates the two insertion portions of each W-phase single-pole coil. . That is, a plurality of W-phase motor insulating papers 1 are inserted and arranged corresponding to a plurality of single-pole coils 8 (W). Further, the overlapping margins 35 of the W-phase electric motor insulating papers 1 are also overlapped, and the interphase insulating portions 3 are arranged in a ring shape along the entire circumference of the stator core 5. As a result, as shown in the figure, the coil end portion 82 of the V-phase single-pole coil 8 (V) entirely faces the interphase insulating portion 3 of the W-phase motor insulating paper 1, and the inner circumference Covered from the surface side. Moreover, the slot cell part 2 arrange | positioned at each slot 50 will be in the state bent by the cross-sectional substantially U shape.
Next, as shown in FIG. 8, the insertion portion 81 of the W-phase single-pole coil 8 is inserted into the slot 50 in which the slot cell portion 2 of the W-phase motor insulating paper 1 is mounted. A single-pole coil 8 (W) is disposed on the stator core 5. At this time, as described above, due to the presence of the interphase insulating portion 3 of the insulating paper 1 for the W-phase motor, the coil end portion 82 of the W-phase single-pole coil 8 (W) It arrange | positions, without contacting with the coil end part 82 of the single pole coil 8 (V).
Thus, as described above, the insulating paper 1 for an electric motor of this example has two slot cell portions 2 for slots into which one single-pole coil 8 is inserted, and two slot cells 2 arranged so as to connect them. The interphase insulating part 3 is integrally provided. Therefore, when the insulating paper 1 for an electric motor is attached to the slot 50 of the stator core 5 and the single-pole coil 8 is attached to the stator core 5, the two insertion portions 81 of the single-pole coil 8 are replaced with two slot cell portions. 2, and the entire length of the coil end portion 82 formed so as to connect the two insertion portions 81 can be reliably faced to the interphase insulating portion 2. Further, the integration of the slot cell portion 2 and the interphase insulating portion 3 can prevent the facing state between the interphase insulating portion 3 and the coil end portion 82 from shifting. Therefore, not only the electrical insulation between the single-pole coil 8 and the stator core 5 but also the electrical insulation between the coil end parts 82 having different phases arranged with the inter-phase insulation part 3 interposed therebetween is surely improved. Can be made.
Further, the two interphase insulating portions 3 are connected by the slot cell portion 2. Therefore, it is not necessary to insert extra ones other than the slot cell portion 2 into the slots 50 of the stator core 5, and the insertability of the coil and the space factor are not reduced.
As shown in FIG. 9, the motor insulating paper 1 of this example uses the same reference sheet 10 as in Example 1, slightly changes the position of the cutting line, uses reinforcing sheets 181 to 186, and others. This is an example in which is changed.
That is, as shown in the figure, the reference sheet 10 of this example has a longer vertical length than that of the first embodiment. The first cutting lines 111 and 112, the second cutting lines 121 and 122, the third cutting lines 131 to 134, and the fourth cutting lines 141 to 144 are provided in the same manner as in the first embodiment, and the central opening 19 is provided. .
On the other hand, unlike Example 1, the reinforcing sheets 181 to 184 were joined and disposed by ultrasonic bonding at four portions to be the cuff part 4 without providing the bent cuff part. In this example, the fifth cutting line as in Example 1 was not provided.
Furthermore, as shown in the figure, in this example, reinforcing sheets 185 and 186 are also bonded and disposed by ultrasonic bonding at a portion close to the slot cell portion 2 which is the interphase insulating portion 3. These reinforcing sheets 181 to 186 were all made of the same material with the same thickness as the reference sheet 10.
Further, in this example, the distance between the fourth cutting lines 141 to 144 and the horizontal outlines 103 and 104 is set to be longer than that of the first embodiment so that the axial length of the interphase insulating portion 3 is longer than that of the first embodiment. Was also bigger. As a result, as shown in FIG. 10, the portions in the vicinity of the horizontal outlines 103 and 104 of the interphase insulating portion 3 can be three-dimensionally formed so as to wrap around the coil end portion 82. In this example, folding lines a2 and b2 are additionally provided so that this three-dimensional shape can be easily formed. It is preferable to join the overlapping portions by folding along the folding lines a2 and b2 using an adhesive or ultrasonic bonding.
In the case of this example, the interphase insulating part 3 is configured to be able to form a three-dimensional shape that faces the coil end part 81 and wraps a part thereof. Therefore, the effect of interphase insulation between coil end portions having different phases can be further enhanced. Further, in this example, a reinforcing portion is provided on the reference sheet 10 by partially sticking reinforcing sheets 181 to 186 to increase the thickness. These reinforcing portions are part of the cuff portion 8 and the interphase insulating portion 3. As a result, only these specific portions can be thickened and reinforced, while the slot cell portion 2 can be kept thin and the line product ratio in the slot can be maintained. The reinforcing portion of the interphase insulating portion 3 can protect the interphase insulating portion 3 when a so-called racing process is performed.
In other respects, the same effects as those of the first embodiment can be obtained.
As shown in FIG. 11, the insulating paper 1 for an electric motor of the present example uses a reference sheet 10 similar to that of the first embodiment, and is not provided with a bent cuff part.
That is, as shown in the figure, the reference sheet 10 having a substantially rectangular outer shape surrounded by a pair of vertical outlines 101 and 102 and a pair of horizontal outlines 103 and 104 is similar to the first embodiment. The first cutting lines 111 and 112, the second cutting lines 121 and 122, the third cutting lines 131 to 134, and the fourth cutting lines 141 to 144 are provided, and the central opening 19 is provided.
On the other hand, unlike Example 1, the bent cuff part was not provided. Therefore, the fifth cutting line as in the first embodiment is not provided.
In this case, the configuration can be made simpler than that of the first embodiment, and the above-described insulating paper 1 for an electric motor can be manufactured more easily. Of course, it is possible to form an unbent cuff part by adjusting the lengths of the inner piece parts 201 and 202.
As shown in FIG. 12, the insulating paper 1 for an electric motor of this example is an example in which a rising covering portion 45 that covers the coil end portion of a single pole coil can be formed on the basis of that of the first embodiment.
That is, the insulating paper 1 for an electric motor of this example is a reference sheet 10 having a substantially rectangular outer shape surrounded by a pair of vertical outer lines 101 and 102 and a pair of horizontal outer lines 103 and 104 as shown in FIG. Similarly to the first embodiment, the first cutting lines 111 and 112, the second cutting lines 121 and 122, the third cutting lines 131 to 134, the fourth cutting lines 141 to 144, and the fifth cutting lines 151 to 154 are provided. At the same time, a central opening 19 was provided.
In this example, the second cutting lines 121 and 122 and the third cutting lines 131 to 134 are such that the distance between the two second cutting lines 121 and 122 is two third cutting lines 131 and 133 or 132. It was arranged so as to be wider than the distance from the H.134. And on the extension of the 2nd cutting lines 121 and 122, the 6th cutting lines 161-164 which face in parallel with the 3rd cutting lines 131-134 were provided, respectively.
The portion between the third cutting line 131 to 134 and the sixth cutting line 161 to 164 is bent in the same direction as the inner piece parts 201 and 202, thereby the boundary part between the slot cell part 2 and the interphase insulating part 3 Of the coil end portion 82 of the single-pole coil 8 in the vicinity, a rising covering portion 45 that covers the rising portion that protrudes from the slot 50 and rises substantially perpendicularly to the end surface of the stator core 5 can be formed.
In this example, the effect of interphase insulation can be further enhanced by the formation of the rising covering portion 45.
As shown in FIG. 13, the insulating paper 1 for an electric motor of this example covers a part of the portion facing the stator core 5 of the coil end portion 82 of the single-pole coil 8 on the bottom surface covering portion based on the one of the first embodiment. 47 is an example in which 47 can be formed.
In this example, the second cutting lines 121 and 122 and the third cutting lines 131 to 134 are such that the distance between the two second cutting lines 121 and 122 is two third cutting lines 131 and 133 or 132. It was arranged so as to be narrower than the distance to 134. Then, by bending the portions having the second cutting lines 121 and 122 as end portions so as to approach the horizontal outlines 103 and 104, one of the portions facing the stator core 5 of the coil end portion 82 of the single-pole coil 8 is obtained. The lower surface covering portion 47 can be formed to cover the portion.
In this example, the effect of interphase insulation can be further enhanced by the formation of the lower surface covering portion 47.
In this example, as shown in FIG. 14, an example in which the electrical insulation of a plurality of single-pole coils 8 can be achieved by a single sheet of motor insulation paper based on the motor insulation paper 1 of the third embodiment. It is.
That is, the motor insulating paper 1 of the present example has a loop unit shape composed of two slot cell portions 2 and two interphase insulating portions 3 in the extending direction of the interphase insulating portion 3 as shown in FIG. In addition, the extension portions of the interphase insulating portions 3 are connected and integrated, and the two unit coils 3 are configured to be electrically insulated.
In the case of this example, it is possible to deal with two single-pole coils 8 by using one sheet of insulating paper for motor 1, and the number of sheets of insulating paper for motor 1 to be used can be reduced.
In other respects, the same effects as those of the third embodiment can be obtained.
FIG. 1 is a perspective view of an insulating paper for an electric motor in Embodiment 1. FIG.
FIG. 2 is an explanatory diagram illustrating a state in which a reference sheet for forming an insulating paper for an electric motor is developed in the first embodiment.
3 is an explanatory diagram showing an arrangement of a stator core and a three-phase single-pole coil in Embodiment 1. FIG.
FIG. 4 is an explanatory diagram showing a state in which a U-phase single-pole coil is disposed on the stator core in the first embodiment.
FIG. 5 is an explanatory view showing a state where a V-phase motor insulating paper is disposed on the stator core in the first embodiment.
FIG. 6 is an explanatory view showing a state in which a V-phase single-pole coil is disposed on the stator core in the first embodiment.
FIG. 7 is an explanatory view showing a state where a W-phase motor insulating paper is disposed on the stator core in the first embodiment.
FIG. 8 is an explanatory view showing a state where a W-phase single-pole coil is disposed on the stator core in the first embodiment.
FIG. 9 is an explanatory diagram illustrating a state in which a reference sheet for forming insulating paper for an electric motor is developed in the second embodiment.
FIG. 10 is an explanatory view showing a state in which the interphase insulating portion of the insulating paper for an electric motor is formed in a three-dimensional shape so as to wrap around the coil end portion in the second embodiment.
FIG. 11 is an explanatory diagram illustrating a state in which a reference sheet for forming an insulating paper for an electric motor is developed in the third embodiment.
12 is an explanatory diagram showing a state in which a reference sheet for forming an insulating paper for an electric motor is developed in Embodiment 4. FIG.
FIG. 13 is an explanatory view showing a state in which a reference sheet for forming insulating paper for an electric motor is developed in Example 5.
14 is a perspective view of an insulating paper for an electric motor in Embodiment 6. FIG.
FIG. 15 is an explanatory view showing slot insulating paper in a conventional example.
FIG. 16 is an explanatory view showing a state in which a single-pole coil is provided with slot insulating paper mounted in a slot in a conventional example.
FIG. 17 is an explanatory view showing interphase insulating paper in a conventional example.
FIG. 18 is an explanatory diagram showing a state in which a single-pole coil is provided with slot insulating paper mounted in a slot in a conventional example.
1. . . Insulating paper for electric motors,
10. . . Reference sheet,
2. . . Slot cell section,
3. . . Phase insulation,
35. . . Overlap section,
4). . . Cuffs,
An insulating paper for an electric motor for improving electrical insulation in a portion where a single-pole coil disposed in a stator core is adjacent,
At least two slot cell portions arranged in two slots of the stator core that accommodates two insertion portions of one single-pole coil, and both ends of the two slot cell portions are connected to form a loop. And the two interphase insulating portions arranged so as to face the coil end portion of the single-pole coil .
The first cutting line adjacent to the inner piece part sandwiched between the pair of third cutting lines facing substantially parallel to each other and the outer piece part sandwiched between the pair of fourth cutting lines facing substantially parallel to each other. And at least two slot cell portions having a substantially U-shaped cross-section, and a portion sandwiched between the third cutting line portion and the horizontal outer shape line. Is an insulating paper for electric motors, which is configured to be the interphase insulating portion .
The loop-shaped unit shape including the two slot cell portions and the two interphase insulating portions is arranged in the extending direction of the interphase insulating portion, and an extended portion of the interphase insulating portion is defined in claim 1. An insulating paper for an electric motor characterized by being connected and integrated and configured to electrically insulate a plurality of the unit coils.
3. The electric motor according to claim 1, wherein the interphase insulating portion has an overlap margin provided by extending both ends thereof, and the plurality of electric insulating papers for the electric motors adjacent to each other when mounted on the stator core. An insulating paper for an electric motor, characterized in that each of the overlapping margins in the insulating paper can be overlaid.
The interphase insulating part according to any one of claims 1 to 3, wherein the interphase insulating part is configured to form a three-dimensional shape that faces the coil end part and wraps part or all of the coil end part. Insulating paper for electric motors.
The insulating paper for an electric motor according to any one of claims 1 to 4, wherein the reference sheet is provided with a reinforcing portion in which a reinforcing sheet is partially pasted to increase the thickness.
6. The fifth cutting line according to claim 1, wherein a fifth cutting line having a predetermined length provided substantially parallel to the first cutting line is connected to the third cutting line. A portion between the cutting line and the first cutting line is folded back in a direction away from the third cutting line, thereby forming a cuff portion that protrudes from the slot of the stator core and is folded toward the end surface of the stator core. An insulating paper for an electric motor, characterized in that it is configured to be able to.
6. The cuff cuff reinforcement paper prepared separately is affixed to the edge part which faces the said 3rd cutting line of the said inner piece part in any one of Claims 1-5, and thickness is thicker than another part. An insulating paper for an electric motor, wherein the cuff portion can be formed without being folded.
The said 2nd cutting line and said 3rd cutting line in any one of Claims 1-5 Insulation paper for electric motors characterized by being provided on the same line as disconnection.
The said 2nd cutting line and the said 3rd cutting line in any one of Claims 1-5 are said 2nd 2nd cutting lines
Is arranged to be wider than the interval between the two third cutting lines, and on the extension of the second cutting line, a sixth cutting faced parallel to the third cutting line. A line is provided, and a boundary between the slot cell portion and the interphase insulating portion is formed by bending a portion sandwiched between the third cutting line and the sixth cutting line in the same direction as the inner piece portion. An insulating paper for an electric motor, characterized in that a rising covering portion that covers the coil end portion of the single-pole coil in the vicinity of the portion can be formed.
6. The method according to claim 1, wherein the second cutting line and the third cutting line are such that an interval between the two second cutting lines is smaller than an interval between the two third cutting lines. The portion of the coil end portion of the single-pole coil facing the stator core is bent by bending a portion having the second cutting line as an end portion so as to approach the horizontal outline. An insulating paper for an electric motor, characterized in that a part of the insulating paper for covering the surface can be formed.
A distribution in which a plurality of single-pole coils are arranged on the stator core, and part of the coil end portions of the single-pole coils protruding from both end faces of the stator core are arranged so as to overlap each other with different phases. In an electric motor with a winding structure,
At least a part of the insulating paper for an electric motor is made of the insulating paper for an electric motor according to any one of claims 1 to 10, and the stator core accommodates at least two insertion portions of the single-pole coil. The two slot cell portions disposed in the two slots and the two slot cell portions are arranged so as to connect the both ends of the two slot cell portions so as to form a loop, and are disposed so as to face the coil end portion of the single-pole coil. And an inter-phase insulating portion, and the inter-phase insulating portion is disposed between adjacent coil end portions of different phases.
JP2003078641A 2003-03-20 2003-03-20 Insulating paper for electric motors and electric motors Active JP4277547B2 (en)
JP2003078641A JP4277547B2 (en) 2003-03-20 2003-03-20 Insulating paper for electric motors and electric motors
US10/781,674 US6995491B2 (en) 2003-03-20 2004-02-20 Insulating paper piece for electric motors and electric motor
DE200410013579 DE102004013579A1 (en) 2003-03-20 2004-03-19 Piece of insulating paper for electric motors and electric motor
JP2004289930A JP2004289930A (en) 2004-10-14
JP4277547B2 true JP4277547B2 (en) 2009-06-10
ID=32984878
JP2003078641A Active JP4277547B2 (en) 2003-03-20 2003-03-20 Insulating paper for electric motors and electric motors
US (1) US6995491B2 (en)
JP (1) JP4277547B2 (en)
DE (1) DE102004013579A1 (en)
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