JP2008042959A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor in which an insulating member can be inserted easily into the slot of the stator of a motor and the quality can be enhanced by reducing poor insulation. <P>SOLUTION: The motor comprises a stator formed by performing resin insulation at the core tooth portion of the stator and applying a winding directly, and a rotor rotating internally on the inside of the stator wherein the resin insulation consists of an outer flange, an inner flange and a drum portion for applying the winding, a groove is provided at the distal end of the inner flange in the circumferential direction to penetrate the stator in the thickness direction and an insulating member can be inserted into the slot easily using that groove as a guide groove, and the distal end in the circumferential direction is provided with a level difference by cutting the end face of the stator in order to prevent the insulating member from falling. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric motor in which resin cores are subjected to resin insulation and a winding is directly wound around an iron core tooth portion of a stator.

Conventionally, such an electric motor has a stator of an electric motor as shown in patent document 1 (Unexamined-Japanese-Patent No. 2002-112488).
This application is shown in FIG. FIG. 12 shows an electric motor by a concentrated winding method in which the winding 31 is directly wound around the iron core tooth portion of the stator 11.
The interphase insulation 81 having a substantially V-shaped cross section interposed between adjacent windings 31 in each slot 61 of the stator 11 has a slot opening on the side of the opening formed in a substantially V-shape. The end of the substantially V-shaped interphase insulation 81 is bent in the direction opposite to the slot opening, and is opened between the adjacent windings in the slot. An electric motor is shown in which the insulation failure between the windings is reduced by being interposed between the winding 31 wound around and the tip of the core tooth portion of the stator 11.

  Similarly to FIG. 12, FIG. 13 shows an electric motor of a concentrated winding system in which the winding 32 is wound directly around the iron core tooth portion of the stator 12, and the winding 32 extends from the opening of the slot 62 to the stator 12. A stepped thin portion is formed substantially parallel to the slot opening of the slot insulation 62a so as not to protrude to the inner diameter side, and a wedge insulating portion 91 is inserted into the outer peripheral surface or inner peripheral surface of the stepped thin portion. An electric motor is shown that plugs the slot opening.

JP 2002-112488 A JP-A-10-271734

  However, as shown in FIG. 12, the winding 31 in which the end portion of the opening portion of the slot 61 of the interphase insulation 81 formed in a substantially V shape is wound around the iron core tooth portion of the stator 11, and the iron core of the stator 11. Although the insulation failure between adjacent windings is reduced by being inserted between the tips of the teeth, the slot opening of the interphase insulation 81 formed in the substantially V shape is opposite to the slot opening. The operation of inserting the bent end portion between the iron core tooth portion of the stator 11 and the winding 31 is extremely difficult. Moreover, if it does not insert between the iron core tooth part of the stator 11 and the coil | winding 31 reliably, the interphase insulation 81 formed in V shape will drop | omit, and it will become insulation failure.

  Further, as shown in FIG. 13, a stepped thin portion substantially parallel to the slot opening of the slot insulation 62a is provided, and the wedge insulation 91 is inserted into the stepped thin portion so that the winding 32 protrudes to the inner diameter side of the stator 12. Similarly, even if not, the winding 32 wound around the iron core tooth portion of the stator 12 collapses the stepped thin portion, making it difficult to insert the wedge insulation 91, and the workability is remarkably deteriorated. .

  The present invention solves such problems, and the interphase insulation 81 formed in a V shape between the iron core teeth of the stator 11 (12) and the winding 31 (32), The wedge insulation 91 can be easily inserted into the stator 11 (12) without hindrance, providing an electric motor with improved workability and quality.

The present invention is a stator in which a coil is directly wound by applying resin insulation to a core tooth portion of a stator in which thin steel plates are laminated, and in an electric motor in which a rotor is internally rotated,
The resin insulation comprises a resin insulation composed of an outer collar part, an inner collar part and a body part around which a winding is wound,
The slot shape of the resin insulation is a slot shape having a slot cross-sectional area that is the same as or wider than the slot shape constituted by the core tooth portion and the core yoke portion of the stator,
A concave groove penetrating in the stacking direction of the stator is provided at the circumferential front end of the inner flange, and the circumferential front end is provided with a stepped portion cut out from the stator end surface, so that the end surface of the stator in the stacking direction is provided. Is resin insulation attached to
The slot formed by the stator core teeth and the core yoke portion is provided with film-like slot insulation, and both end portions of the slot insulation have an insulating structure protruding from both end surfaces in the stacking direction of the stator. ,
In each slot in which each core tooth portion of the stator is resin-insulated and directly wound with a winding, there is inter-phase insulation interposed between adjacent windings, and the cross-sectional shape of the inter-phase insulation is substantially V An insulating member formed in a letter shape, wherein an opening portion of the insulating member having a substantially V-shaped cross section is disposed so as to face each slot opening portion of the stator, and the insulating member A bent portion is provided in which the end of the opening of the member is bent in the opposite direction to the slot opening;
The bent portion is inserted through a concave groove penetrating in the stacking direction of the stator at the circumferential tip of the inner flange, and the bent portion is inserted between the iron core tooth portion and the winding of the stator, The bent portion is fixed by a stepped portion cut out from the end surface of the stator at the circumferential end of the collar portion so that the opening of the insulating member having a substantially V-shaped cross section closes the slot opening of the stator. The motor is fixed to the motor.

  In addition, the insulating structure is the same as described above, and an insulating member having a substantially rectangular cross section is inserted from a recessed groove penetrating in the stacking direction of the stator at the circumferential front end of the inner flange, thereby The insulating member is fixed by a stepped portion notched from the stator end surface of the circumferential tip of the inner flange, with the circumferential end of the member interposed between the core tooth portion of the stator and the winding, The electric motor is fixed so that the insulating member closes the slot opening of the stator.

  In addition, film-like slot insulation is provided in the slots formed by the iron core teeth of the stator of these electric motors, and both end portions of the slot insulation protrude from both end surfaces in the stacking direction of the stator, and the stator stacks. The electric motor has a bent part bent at both end surfaces in the thickness direction, and is locked to a stator by the bent part.

  These electric motors are provided with an anti-scattering insulating cover so that windings, lead wires, connection points, etc., which are directly wound with resin insulation on the stator core teeth of the stator are not scattered, and the anti-scattering insulating cover. Is an electric motor fixedly engaged with one or both of the outer and inner flanges of the resin insulation.

  The insulating cover for scattering prevention has an inner side wall and an outer side wall, and the inner side wall projects a portion facing the slot opening of the iron core tooth portion of the stator, and the inner insulating rib portion of the resin insulation. It has a shape that engages with unevenness.

  Moreover, such an electric motor can be mounted in a compressor of an outdoor unit such as a refrigerator or an air conditioner or used for a vehicle.

  The electric motor according to the present invention is a concentrated winding type electric motor in which the core tooth portion of the stator is resin-insulated and directly wound with the winding, and the interphase insulation between the windings opens in a substantially V-shape facing the slot opening. An insulating member having a V-shaped cross-section, and having a bent portion that is bent in a direction opposite to the slot opening at the circumferential end of the insulating member, between the core tooth portion of the stator and the winding When inserting the bent portion, a guide groove of a concave groove penetrating in the stacking direction of the stator is provided at the distal end in the circumferential direction of the inner flange portion of the resin insulation, and inserted by using the concave groove. It is easy to insert even between the stator core teeth and the windings even with insulating members that are thin, thin, and have a substantially V-shaped cross section. Can be improved. Moreover, since it can insert reliably, the insulation defect between phases can be reduced.

  Further, it is a concentrated winding type motor in which the core tooth portion of the stator is resin-insulated and directly wound with a winding, and an insulating member in which the cross-sectional shape of the wedge insulation between the windings is formed in a substantially rectangular shape. When the circumferential end of the insulating member is inserted between the stator core tooth portion and the winding, the circumferential end of the insulating member extends in the stacking direction of the stator at the circumferential tip of the inner flange of the resin insulation. By providing a guide groove with a recessed groove that penetrates and inserting using the recessed groove, it is fixed even with an insulating member that is thin, has no waist, and has a substantially rectangular cross-sectional shape that bends immediately It can be easily inserted between the iron core teeth of the child and the windings, and workability can be improved. In addition, since the wire can be reliably inserted, the winding does not protrude from the slot opening of the stator to the inner diameter side, and there is no insulation failure.

  In addition, a stepped portion cut out from the end surface of the stator is provided at the circumferential front end of the inner flange portion of the resin insulation, so that the cross-sectional shape is in a direction opposite to the slot opening portion of the insulating member formed in a substantially V shape. It is possible to prevent the bent portion or the end portion in the circumferential direction of the insulating member having a substantially rectangular cross section from being caught by this stepped portion and coming out in the stacking direction of the stator. Moreover, since it can be reliably fixed to the stator, there is no insulation failure.

  In addition, by forming film slot insulation in the slots formed by the iron core teeth of the stator of these electric motors, a large number of windings can be wound and the performance can be improved. The film-like slot insulation protrudes longer than both ends in the stator stacking direction. Thereby, the pressure | voltage resistant defect which generate | occur | produces in the boundary of resin insulation and a stator end surface can be reduced.

  Further, as a method for reliably fixing the film-like slot insulation to the end surface portion in the stacking direction of the stator, the slot shape of the resin insulation is wider than the slot shape constituted by the core tooth portion and the core yoke portion of the stator. A slot cross-sectional area is formed, and at the difference (step) portion from the slot shape of the resin insulation, an ear fold portion is formed by bending the end portion protruding longer than both ends of the slot insulation stator thickness direction. , It is locked and fixed at this bent corner. As a result, the slot insulation does not fall off from the stator, and the slot insulation does not move, so that the winding can be easily wound and workability is improved.

  These motors are used as a method to prevent the workability from deteriorating due to scattering of windings, lead wires, and connection points directly wound with resin insulation on the stator core teeth of the stator, and to reduce poor insulation. A retaining portion is provided on one or both of the outer and inner flanges of the resin insulation and the lid is covered with an anti-scattering insulating cover. As a result, the windings, lead wires, connection points and the like wound around the iron core teeth of the stator can be reliably fixed.

  The inner side wall of the anti-scattering insulating cover has a shape in which a portion facing the slot opening of the iron core tooth portion of the stator protrudes and meshes with the inner flange portion of the resin insulation by unevenness. As a result, the insulating member having a substantially V-shaped cross-section and a substantially rectangular cross-section is caught at the step portion of the circumferential end of the resin insulation so that it does not come out in the stacking direction of the stator. The axial movement of the insulating member can be forcibly suppressed at the tip of the convex portion of the concave and convex portion on the inner side wall of the preventing insulating cover, and the jumping out of the insulating member can be prevented. In addition, since windings, lead wires, connection points, etc. do not protrude from the gap between the resin insulation and the slot opening of the stator to the inner diameter side of the stator, there is also a defect that causes a burnout accident due to contact with the rotor. Can be reduced.

  In addition, it is possible to make an electric motor with improved workability and reduced manufacturing costs, and an electric motor with improved insulation and reduced quality by improving workability, so it can be installed in compressors of outdoor units such as refrigerators and air conditioners. It can be used for electric motors or vehicle applications.

  Embodiments of the present invention will be described with reference to the drawings. The symbols used in the drawings of the present embodiment are the same for portions that do not hinder practical use. FIG. 1 shows a concentrated winding in which a thin electromagnetic steel sheet is punched out by a press or the like, and the thin steel electromagnetic steel sheets are laminated and integrally fixed with an auto clamp or the like, and a resin insulation 2 is applied to the core tooth portion of the stator 1 and the winding is directly wound. This is an electric motor of the type.

  In FIG. 1 to FIG. 3 and FIG. 10 described in the present embodiment, no winding is wound around the iron core tooth portion of the stator 1, but this is not shown for convenience in order to facilitate understanding of the drawing. is doing.

  The number of slots of the stator 1 is 9 and forms 3 phases and 6 poles. The resin insulation 2 used for the stator 1 is disposed at both ends of the stator 1 in the stacking direction (axial direction). The resin insulation 2 has a slot shape having a slot cross-sectional area which is the same as or slightly larger than the slot shape formed by the core tooth portion and the core yoke portion of the stator 1.

  The resin insulation 2 is provided with an inner flange 3 on the inner diameter side of the stator and an outer flange 4 on the outer diameter side of the stator so as to stand up in the stacking direction from the end face of the stator on which the thin steel plates are stacked. Further, the inner flange portion 3 and the outer flange portion 4 are mounted along the iron core tooth portion of the stator 1, and are connected by the trunk portion 5. Windings are concentrated around the body 5 of the resin insulation 2. The resin insulation 2 configured as described above is attached to both ends of the stator in which thin steel plates are stacked.

  A concave groove 3 a that penetrates in the stacking direction of the stator 1 is provided at the circumferential end 3 b of the inner flange 3 that stands up from the stator end surface of the resin insulation 2. The concave grooves 3 a provided in the inner flange 3 of the resin insulation 2 are provided in both ends of the stator 1 or one of the resin insulations 2. However, if the direction in which the insulating member is easy to drop is determined to be in a certain direction, the insulating member is inserted without providing the concave groove 3a in the inner flange portion 3 on the one side of the resin insulation 2 that is easy to drop off. The concave groove 3a may be provided only on the inner flange portion on the resin insulation 2 side.

  Further, a stepped portion 7 is provided by notching the front end in the circumferential direction on the side of the stator end surface of the inner flange 3 raised from the stator end surface of the resin insulation 2. The stepped portions 7 may also be provided on both of the inner flange portions 3 of the resin insulation 2 attached to both ends of the stator 1 laminated with thin steel plates in the same manner as the concave grooves 3a. May be provided.

FIG. 11 is a partially enlarged view of the concave groove 3a at the distal end in the circumferential direction of the inner flange 3.
The width of the circumferential tip portion 3b having the concave groove 3a of the inner flange 3 is at least the lower end portion (stator end surface side) of the circumferential tip portion facing the stator inner diameter side of the circumferential tip portion having the concave groove 3a. It is preferable that the width X is equal to or wider than the width Y (radial width) of the tip portion extending in the circumferential direction of the iron core tooth portion facing the inner diameter side of the stator (width Y ≦ width X).

  Further, the shape of the outer flange portion 4 of the resin insulation 2 is for engaging the end portion of the winding directly wound around the resin insulation 2 mounted on the iron core tooth portion of the stator 1 or for drawing the lead wire. The shape is uneven (4a, 4b). That is, the lead wire, which is the end of the winding wound around the resin insulation 2 of each stator core tooth portion, is drawn from the concave portion 4b between the convex portions 4a to the outer peripheral side of the outer flange portion 4, and this lead is drawn to the convex portion 4a. Further, since the lead lines can be locked, the lead lines do not overlap and come into contact with each other, and there is no insulation failure.

  In addition, a film-like slot insulation 6 a is applied to the slot 6 constituted by the iron core tooth portion and the iron core yoke portion of the stator 1. As a result, the resin insulation 2 attached to both ends of the stator 1 and the slot insulation 6a in the slot are not an integral resin molded product, so that the resin thickness of the slot sidewall in the slot can be reduced. Can be wound around. Also, the amount of resin used is small, which is advantageous in terms of cost.

  The film-like slot insulation 6a mounted in the slot is formed in the direction of the thickness of the stator 1 so that insulation failure does not occur at the connecting portion between the resin insulation 2 mounted on both ends of the stator 1 and the stator core. Slot insulation 6a is applied so as to protrude from both end faces. In consideration of the insulation distance between the winding and the stator core, the film-like slot insulation 6a is arranged so as to protrude from both end faces of the stator by about 2 mm to 4 mm. Therefore, the resin insulation 2 attached to both ends of the stator and the fill-like slot insulation 6a are slightly overlapped at both ends of the stator.

  The protrusion of the film-like slot insulation 6a from both ends of the stator is caused by the stepped portion from the stator end face side at the circumferential end of the inner flange 3 of the resin insulation 2 attached to the end of the stator. The portion 7 is fixed so as not to move in the stator stacking direction. The notch length (height) from the stator end face of the stepped portion 7 is set slightly longer than the length of the stepped portion 7 protruding from the both end faces of the stator of the film-like slot insulation 6a. Specifically, it is about 0.5 mm longer than the length of the slot insulation 6a protruding from the end face of the stator. In this case, even if the slot insulation 6a moves in the stator stacking direction, the stator core and the winding can be reliably insulated.

  Thus, in an electric motor having an insulating structure in which the end face of the stator is provided with the resin insulation 2 and the slot 6 is insulated with the film-like slot insulation 6a, usually many windings are wound around the iron core teeth of the stator 1. However, it is important to ensure insulation between the windings wound around the iron core teeth. In this embodiment, an insulating member 8 having a substantially V-shaped cross section shown in FIG. 4 is used between the windings. An opening portion of the insulating member 8 that is open in a V shape is inserted so as to face the slot opening portion 80. FIG. 2 shows a method of fixing the insulating member 8 having a V-shaped cross section in the slot.

  In the embodiment of FIG. 2, the end of the insulating member 8 having a substantially V-shaped cross section is opened in the direction opposite to the slot opening 80 side, and the bent portion 8a is bent into the stator core. It is structured so as to be interposed between the winding wound around the tooth portion and the slot 6 of the stator core so that the interphase insulation does not move.

  The bent portion 8a of the insulating member 8 having a substantially V-shaped cross-sectional shape is difficult to be easily inserted because many windings are wound around the stator core tooth portion as described above. Therefore, in the present embodiment, the inner flange portion 3 of the resin insulation 2 attached to the end portion of the stator is attached so that the bent portion 8a of the insulating member 8 having a substantially V-shaped cross section can be easily inserted. A concave groove 3a that penetrates in the stacking direction of the stator 1 is provided at the circumferential tip, and the bent portion 8a of the insulating member 8 having a substantially V-shaped cross section is fixed by using the concave groove 3a as a guide groove. It is inserted between the winding wound around the core teeth and the slot 6 of the stator core.

  Accordingly, the insulating member 8 having a V-shaped film-like cross-sectional shape that is thin and has no waist can be easily inserted, improving workability and increasing productivity. Further, preferably, as shown in FIG. 11, the width of the groove 3a of the circumferential tip 3b of the inner flange 3 is at least the surface on the stator inner diameter side of the circumferential tip 3b having the groove 3a. The width X of the lower end (stator end face side) on the side to be welded is the same as or wider than the width Y (radial width) of the tip part extending in the circumferential direction of the iron core tooth part facing the stator inner diameter side. Y ≦ width X) is preferable. Thereby, when inserting the insulating member 8, the front-end | tip part extended in the circumferential direction of an iron core tooth part can be easily inserted in the slot 6 without becoming obstructive. More preferably, considering the thickness of the slot insulation 6a, the thickness of the slot insulation 6a + the width Y ≦ the width X may be satisfied.

  It should be noted that the bent portion 8a of the insulating member 8 having a V-shaped cross-section closes the portion opened to the V-shape of the V-shaped cross section when inserted into the groove 3a provided in the inner flange 3. It is made into a T shape and inserted into the groove 3a, and after insertion, it faces the slot opening 80 side and is spread and inserted in a substantially V shape. In addition, the length of the insulating member 8 having a V-shaped cross section is a length that slightly protrudes from the end face of the stator.

  This is because the bent portion 8a of the insulating member 8 having a substantially V-shaped cross-section extending in a V shape facing the slot opening 80 side slightly protrudes from the end face of the stator. It can fix by the level | step-difference part 7 notched from the stator end surface side of the circumferential direction front-end | tip part of the inner side collar part 3 of the resin insulation 2 mentioned above. Thereby, it can prevent that an insulating member slips out in the lamination direction of a stator. In addition, by slightly protruding from the end face of the stator, a sufficient insulation distance between the winding and the stator core can be secured.

  The slightly protruding portion from the stator end surface of the insulating member 8 formed in the substantially V shape of the cross-sectional shape specifically protrudes from the both end surfaces of the stator by about 2 mm to 4 mm. Further, the notch length (height) from the stator end face of the stepped portion 7 is the insulating member 8 formed in a substantially V-shaped cross section similar to the length of the film-like slot insulation 6a described above. Is inserted into the stator, and is about 0.5 mm longer on one side than the length of the insulating member 8 formed in a substantially V-shaped cross section.

  FIG. 3 shows another embodiment. Usually, since many windings are wound around the iron core tooth portion of the stator 1, the windings jump out from the slot opening 80 toward the inner diameter side of the stator and may come into contact with the rotor, resulting in poor insulation and burning accidents. . Therefore, it is necessary to prevent the winding from protruding from the slot opening 80 of the stator 1 to the stator inner diameter side. In this embodiment, the insulating member 9 having a substantially rectangular cross-sectional shape shown in FIG. 5 is inserted between the windings and inserted into the slot opening 80. FIG. 3 shows a method for fixing the insulating member 9 having a substantially rectangular cross section to the slot opening 80.

  In the embodiment of FIG. 3, the circumferential end 9a of the insulating member 9 having a substantially rectangular cross-sectional shape is wound between the winding around the stator core tooth and the slot 6 of the stator core. It is structured to be inserted and sandwiched.

  The circumferential end 9a of the insulating member 9 whose cross-sectional shape is formed in a substantially rectangular shape can be easily inserted because many windings are wound around the stator core tooth portion as described above. Since it is difficult to insert the circumferential end 9a of the insulating member 9 having a substantially rectangular cross-sectional shape, it is easy to insert the circumferential end of the inner flange 3 of the resin insulation 2 attached to the stator end. A concave groove 3a that penetrates in the stacking direction of the stator is provided in the direction front end portion 3b, and the circumferential end 9a of the insulating member 9 that is formed in a substantially rectangular shape with the concave groove 3a as a guide groove is fixed. It is inserted between the winding wound around the core teeth and the slot 6 of the stator core.

  Accordingly, even the insulating member 9 having a thin, thin film that is bent easily and can be easily bent can be easily inserted, so that workability can be improved and productivity can be improved. Further, preferably, as shown in FIG. 11, the width of the groove 3a at the circumferential tip of the inner flange 3 faces at least the stator inner diameter side of the circumferential tip 3b having the groove 3a. The width X of the lower end (stator end face side) on the side is the same as or wider than the width Y (radial width) of the tip part extending in the circumferential direction of the iron core tooth part facing the stator inner diameter side (width Y) ≦ Width X) is preferable. Thereby, when inserting the insulating member 9, the front-end | tip part extended in the circumferential direction of an iron core tooth part can be easily inserted in the slot 6 without becoming obstructive. More preferably, considering the thickness of the slot insulation 6a, the thickness of the slot insulation 6a + the width Y ≦ the width X may be satisfied.

In addition, the length of the circumferential end 9a of the insulating member 9 having a substantially rectangular cross-sectional shape is a length that slightly protrudes from the end face of the stator.
This is because the circumferential end 9a of the insulating member 9 having a substantially rectangular cross-sectional shape slightly protrudes from the end face of the stator. It can fix with the level | step-difference part 7 notched from the stator end surface side of the part 3b. Thereby, it can prevent that an insulating member slips out in the lamination direction of the stator 1. In addition, by slightly protruding from the end face of the stator, a sufficient insulation distance between the winding and the stator core can be secured.

  The slightly protruding portion from the stator end face of the insulating member 9 whose cross-sectional shape is formed in a substantially rectangular shape specifically protrudes from the both end faces of the stator by about 2 mm to 4 mm. In addition, the notch length (height) of the stepped portion 7 from the stator end surface is the same as the length of the film-like slot insulation 6a described above, and the insulating member 9 whose cross-sectional shape is formed in a substantially rectangular shape. Is inserted in the stator 1, the cross-sectional shape is about 0.5 mm longer on one side than the length of the insulating member 9 formed in a substantially rectangular shape.

  In addition, a film-like slot insulation 6a is inserted in the slot 6 constituted by the iron core tooth portion of the stator 1 shown in FIGS. 1 to 3 of the present embodiment. A shape like the slot insulation 63a shown in FIG. 6 may be used. Both end portions of the slot insulation 63a protrude from the end face of the stator and are provided with bent ears 63aa which are bent toward the end face of the stator. The bent corner 63aa is engaged by a stepped portion 7 between a slot shape formed by the core tooth portion and the core yoke portion of the stator 1 and a slot shape of the resin insulation 2 having a slightly wider slot cross-sectional area. It has a structure to stop. The slot fold 63aa prevents the slot insulation 63aa from falling off the stator 1, and the slot insulation 63a does not move within the slot, so that the winding work can be easily performed.

  Further, in the motor of this embodiment, the winding of the stator 1 with the resin insulation 2 applied to the core tooth portion of the stator 1 and the winding directly wound is bent, or the lead wire and the connection point are scattered, so that the handling work is remarkably deteriorated. In order to prevent insulation failure, etc., an anti-scattering insulating cover 100 as shown in FIG. 7 is fixed with a locking portion provided on one or both of the inner flange portion 3 and the outer flange portion 4 of the resin insulation 2. ing. FIG. 7A is a perspective view seen from the front (top) of the anti-scattering insulating cover 100, and FIG. 7B is a perspective view seen from the back (bottom) of the anti-scattering insulating cover 100.

  7A and 7B, a scattering prevention insulating cover 100 includes a ring plate 200 that covers an upper end portion of a winding (coil end portion) wound around an iron core tooth portion of the stator 1, and the ring plate. The inner side wall 300 extends so as to stand from the inner diameter side of the stator 200 and the outer side wall 400 extends so as to stand from the outer diameter side of the stator. A plurality of air holes 500 for releasing heat are provided in the circumferential direction of the ring plate 200. Further, a fixing groove 600 for fixing the lead wire drawn out from the electric motor is provided.

  FIG. 8 is a view in which the scattering preventing insulating cover 100 is mounted on the end of the stator. FIG. 9 is a cross-sectional view taken along the line A-A ′ so that the L-shaped anchoring portion 400 </ b> C can be seen when the scattering prevention insulating cover 100 is attached to the end of the stator shown in FIG. 8. The outer side wall 400 of the anti-scattering insulating cover 100 is provided with an L-shaped anchoring portion 400C for holding the anti-scattering insulating cover 100 so as not to bend the windings or scatter the lead wires or connection points. It has been. Thereby, it is possible to engage with the retaining portion 4 </ b> C of the outer flange portion 4 of the resin insulation 2, and the scattering prevention insulating cover 100 can be reliably fixed to the stator 1.

  In addition, the inner side wall 300 of the anti-scattering insulating cover 100 has a shape that protrudes from a portion facing the slot opening 80 of the iron core tooth portion of the stator 1 and meshes with the inner flange portion 300 of the resin insulation 2 by unevenness. As a result, the windings, lead wires, connection points, etc. protrude from the gap between the resin insulation 2 and the slot opening 80 of the stator 1 to the inner diameter side of the stator and come into contact with the rotor, resulting in a burnout accident. The occurrence of defects can be prevented.

  Further, the insulating member 8 having a substantially V-shaped cross-section and the insulating member 9 having a substantially rectangular cross-sectional shape are caught by the stepped portion 7 of the circumferential tip 3b of the resin insulation 2 and the stator. Further, the movement of the insulating members 8 and 9 in the stacking direction is forced by the tip portion of the convex portion 300a of the uneven portion of the inner side wall 300 of the scattering prevention insulating cover 100. The insulating members 8 and 9 can be prevented from popping out.

  FIG. 10 shows another embodiment. 4 shows another embodiment of the resin insulation 2 having the same function as the electric motor shown in FIGS. As in FIGS. 1 to 3, the windings wound around the iron core teeth of the stator 1 are not shown for convenience in order to facilitate understanding of the drawings.

  The resin insulation 20 in FIG. 10 has a slot shape having a slot cross-sectional area that is the same as or slightly wider than the slot shape formed by the core tooth portion and the core yoke portion of the stator 10. In addition, the resin insulation 20 is provided with an inner flange 30 on the inner diameter side of the stator and an outer flange 40 on the outer diameter side of the stator so as to stand up in the stacking direction from the stator end face on which the thin steel plates are stacked. Further, the inner flange portion 30 and the outer flange portion 40 are mounted so as to be along the iron core tooth portion of the stator 10 and are connected by the trunk portion 50. A winding is concentratedly wound around the body 50 of the resin insulation 20. The resin insulation 20 configured as described above is attached to both ends of the stator in which thin steel plates are laminated.

  A concave groove 30 a that penetrates in the stacking direction of the stator 1 is provided at the circumferential end 30 b of the inner flange 30 that stands up from the stator end face of the resin insulation 20. In this case, the concave groove 30a is formed by passing through the concave groove 30a obliquely penetrating into the slot 60 from the upper end 30aa to the lower end 30ab of the circumferential tip 30b of the inner flange 30 of the resin insulation 20, the thickness of the stator 1. In the direction. Further, a stepped portion 70 cut out from the end face of the stator is provided at the circumferential tip 30b of the inner flange 30 of the resin insulation 20.

  Accordingly, the bent portion 8a of the insulating member 8 whose cross-sectional shape is formed in a substantially V shape with interphase insulating paper, and the circumferential end 9a of the insulating member 9 whose wedge-shaped cross-sectional shape is formed in a substantially rectangular shape, A concave groove 30a penetrating in the stacking direction of the stator 10 provided in the inner flange portion 30 of the resin insulation 20 is used as a guide groove, and between the winding wound around the stator core tooth portion and the slot 60 of the stator core. It can be easily inserted. Further, a step formed by cutting out from the end face of the stator provided at the circumferential end 30b of the inner flange 30 of the resin insulation 20 so that the inserted insulating members 8 and 9 do not come off in the stacking direction of the stator 10. The insulating member 20 can be pressed by the portion 70 and fixed so as not to fall off. In addition, the recessed groove 30a which penetrates provided in the circumferential direction front-end | tip part 30b of the inner side collar part 30 may be provided in both or any one of the resin insulation 20 with which both ends of the stator 10 are mounted | worn.

  As described above, the electric motor of the present embodiment can be a motor with greatly improved workability and reduced insulation failure. Therefore, the electric motor can be mounted in a compressor of an outdoor unit such as a refrigerator or an air conditioner or used as a motor for a vehicle. As a result, the manufacturing cost can be reduced, the quality can be improved, and an electric motor free from burnout can be obtained.

  In addition, it is preferable to use polyethylene sulfide (PPS), polybutylene terephthalate (PBT), liquid crystal polymer (LCP), etc. as the material of the resin insulation of the motor used in this embodiment and the insulating cover for scattering prevention. The slot insulation material is preferably polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or the like.

The figure of the electric motor in this embodiment. The figure which inserts an insulation member (interphase insulation) in the electric motor of this embodiment. The figure which inserts an insulating member (wedge insulation) in the electric motor of this embodiment. The figure of the insulation member (interphase insulation) in which the cross-sectional shape was formed in the substantially V shape. The figure of the insulation member (wedge insulation) by which cross-sectional shape was formed in the substantially rectangular shape. The figure showing another embodiment of slot insulation. The figure of the insulation cover for scattering prevention. The figure which attached the insulation cover for scattering prevention to the stator and was seen from the stator upper part. A-A 'sectional view of FIG. The figure of the electric motor in another embodiment. The elements on larger scale of the ditch | groove 3a of the circumferential direction front-end | tip part of an inner side collar part. The figure of the electric motor in conventional embodiment. The figure of the electric motor in conventional embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 10, 11, 12 ... Stator 2, 20 ... Resin insulation 3, 30 ... Inner collar part 3a, 30a ... Concave groove 3b, 30b ... Circumferential tip of inner collar part Part 30aa ... Upper end part 30ab of the circumferential tip part ... Lower end part 31, 32 of the circumferential tip part ... Winding 4, 40 ... Outer collar part 4a ... Convex part of the outer collar part 4b... Recessed portion 4c on the inner collar portion... Locking portion 5 on the outer collar portion 50... Body portion 6, 60, 61, 62. · Slot insulation 63aa · Folded portion 7 · 70 · Step portion 8 · · · Insulating member 8a formed in a substantially V-shaped cross-section · · · Bending portion 81 · · · V-shaped cross-sectional shape Insulating member 9 formed in the shape of the cross-sectional shape Insulating member 9a formed in a substantially rectangular shape. Insulating member 100 formed in a rectangular shape ... Insulation cover 200 for preventing scattering ... Ring plate 300 ... Inner side wall 300a ... Convex portion 400 on inner side wall ... Outer side wall 400c ... Outer side wall Locking part 500 ... Air hole 600 ... Lead wire stator groove

Claims (7)

In a stator in which the core tooth portion of a stator laminated with thin steel plates is resin-insulated and directly wound with a winding, in which the rotor is inverted inside the stator,
The resin insulation is a resin insulation composed of an outer collar part, an inner collar part, and a body part around which a winding is wound,
The slot shape of the resin insulation has a slot cross-sectional area that is the same as or wider than the slot shape constituted by the core tooth portion and the core yoke portion of the stator,
A concave groove penetrating in the stacking direction of the stator is provided at the circumferential front end of the inner flange, and the circumferential front end is provided with a stepped portion cut out from the stator end surface, so that the end surface of the stator in the stacking direction is provided. Is resin insulation attached to
The slot formed by the stator core teeth and the core yoke portion is provided with film-like slot insulation, and both end portions of the slot insulation have an insulating structure protruding from both end surfaces in the stacking direction of the stator. ,
In the slot, there is interphase insulation interposed between adjacent windings, and the cross-sectional shape of the interphase insulation is an insulating member formed in a substantially V shape, and the cross-sectional shape of the insulating member is substantially An opening formed in a V shape is disposed so as to face each slot opening of the stator, and a bent portion in which an end of the opening of the insulating member is bent in a direction opposite to the slot opening is provided. Provided,
The bent portion is inserted through a concave groove penetrating in the stacking direction of the stator at the circumferential tip of the inner flange, and the bent portion is inserted between the iron core tooth portion and the winding of the stator, The bent portion is fixed by a stepped portion cut out from the stator end surface at the circumferential end of the collar portion, and the insulating member having a substantially V-shaped cross section is fixed so as to block the slot opening of the stator. An electric motor characterized by that. In a stator in which the core tooth portion of a stator laminated with thin steel plates is resin-insulated and directly wound with a winding, in which the rotor is inverted inside the stator,
The resin insulation is a resin insulation composed of an outer collar part, an inner collar part, and a body part around which a winding is wound,
The slot shape of the resin insulation has a slot cross-sectional area that is the same as or wider than the slot shape constituted by the core tooth portion and the core yoke portion of the stator,
A concave groove penetrating in the stacking direction of the stator is provided at the circumferential front end of the inner flange, and the circumferential front end is provided with a stepped portion cut out from the stator end surface, so that the end surface of the stator in the stacking direction is provided. Is resin insulation attached to
The slot formed by the stator core teeth and the core yoke portion is provided with film-like slot insulation, and both end portions of the slot insulation have an insulating structure protruding from both end surfaces in the stacking direction of the stator. ,
An insulating member having a substantially rectangular cross-sectional shape is inserted from a recessed groove that penetrates in the stacking direction of the stator at the circumferential tip of the inner flange, and the circumferential end of the insulating member is inserted into the stator. The insulating member is fixed by a stepped portion that is inserted between the iron core tooth portion and the winding and is notched from the stator end surface at the circumferential tip of the inner flange, and the insulating member is a slot opening of the stator. An electric motor characterized by being fixed so as to block. The slot formed by the core teeth of the stator of the motor is provided with film-like slot insulation, and both end portions of the slot insulation protrude from both end surfaces in the stacking direction of the stator, and both ends in the stacking direction of the stator The electric motor according to claim 1, further comprising an ear fold portion bent on a surface side, and being locked to a stator by the ear fold portion. The electric motor includes an anti-scattering insulating cover for preventing a winding, a lead wire, a connection point, and the like directly wound by applying resin insulation to a core tooth portion of a stator, and the anti-scattering insulating cover is the resin The electric motor according to any one of claims 1 to 3, wherein the electric motor is fixed to one or both of an outer flange portion and an inner flange portion. The anti-scattering insulating cover has an inner side wall and an outer side wall, and the inner side wall projects a portion facing the slot opening of the iron core tooth portion of the stator, The electric motor according to claim 4, wherein the electric motor has a shape that engages with unevenness. The electric motor according to any one of claims 1 to 5, wherein the electric motor is mounted in a compressor of an outdoor unit such as a refrigerator or an air conditioner. 6. The electric motor according to claim 1, wherein the electric motor is mounted as a vehicle application.

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