JPH10290543A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the heat radiating characteristic of the stator coil of a motor. SOLUTION: The heat which is generated from the stator coil 34 of a motor when the motor is operated is transferred to a motor housing 12 from the coil end 34a of the coil 34 through an insulating resin layer 42, a coil end cover 44 made of copper, and a heat transferring jacket 24 made of copper and having a wavy cross section and further transferred to the cooling water contained in a water jacket 24. Since most of the heat transferring route between the coil end 34a and motor housing 12 is made of the nonmagnetic metal, the heat radiating characteristic of the motor is improved and the heat generation, etc., by an eddy current in the spacer 46 does not occur. In addition, the dimensional variation of the coil end 34a can be cancelled by the deformation of the spacer 46.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a stator having a stator body provided in a motor housing, a stator having a stator coil wound around the stator body, and a rotor rotatably inserted in the stator. The present invention relates to a motor, and particularly to cooling of a stator coil.

[0002]

2. Description of the Related Art In a motor, the action of a current or a magnetic field causes
The stator and rotor generate heat. It is necessary to secure the required life of the motor by suppressing the temperature rise due to heat generation, and to prevent a decrease in performance. Focusing on the stator, the stator body generates heat due to iron loss, and the stator coil wound around the stator body generates heat due to copper loss. Conventionally, heat generated in a stator coil has generally been radiated mainly into the air from a coil end portion as described below.

FIG. 7 shows the vicinity of an end of a stator of a conventional general motor, in which the motor is cut by a plane including a rotating shaft. The motor housing 1 includes a cylindrical tube portion 2 and a disk-shaped flange portion 3 corresponding to a lid closing a tube end. A stator 4 is fixed inside the cylindrical portion 2. The stator 4 includes a cylindrical stator body 5 and a stator coil 6 provided on the stator body 5. A rotor 7 is inserted inside the stator 4, and the rotor 7 is rotatably supported by the motor housing 1.

As is well known, a plurality of slots, which are grooves in the direction of the rotation axis, are provided on the inner peripheral surface of the stator body 5, and the stator winding is wound so as to fit into the slots, whereby the stator coil 6 is formed. Is formed. The stator winding is wound so as to pass through one slot, exit from the end face of the stator body 5, and enter another slot. Therefore, the stator coil 6 protrudes from the end face of the stator main body 5 in a loop shape, and this protruding portion is called a coil end.

[0005] The flange portion 3 of the motor housing 1 is provided at an appropriate distance from the stator body 5 as shown in FIG. Thereby, the motor housing 1
A predetermined stator end gap 8 is formed between the inner wall surface 1a and the end surface 4a of the stator body 5. It is necessary to set the stator end gap 8 to be relatively large in consideration of the large variation in the size of the coil end.

During operation of the motor, the heat generated by the copper loss in the stator coil 6 is radiated mainly to the space of the gap 8 as shown by the arrow, and is partially transmitted to the stator body 5. However, since the heat transfer coefficient of air is low, it is desired to improve the cooling performance of the stator coil.

Therefore, in Japanese Patent Application Laid-Open No. Hei 5-236705, a clearance between an inner wall surface of a motor housing and a stator coil,
Further, the gap between the inner wall surface of the slot of the stator body and the stator coil is filled with a thermally conductive composite resin material. The heat conductive composite resin material is obtained by adding a granular material having electrical insulation to the resin. According to the motor disclosed in the above publication, the space around the coil end is filled with resin, and heat generated in the coil is transmitted to the motor housing via the resin member. Therefore, the heat of the coil can be released more effectively than the heat transfer to the air.

[0008]

With reference to the schematic diagram of FIG. 8, when the space around the coil end is filled with resin, the thermal resistance in the heat transfer between the coil end and the motor housing is roughly determined. The thermal resistance R is expressed as R = L / (λ · A) using the thermal conductivity λ, the heat transfer distance L, and the heat transfer area A. The thermal conductivity λ (W / m · K) of each material is copper (λc
u) is 384, aluminum (λal) is 151, and resin (λf) is 0.33.

In FIG. 8A, the space between the coil end and the motor housing is filled only with resin. The thermal resistance R1 at this time is expressed as follows.

[0010]

R1 = L / (λf · A) = 500 × L / (λal · A) In FIG. 8B, aluminum oxide particles are added to the resin as an electrically insulating granular material. It is assumed that the volume ratio between the resin and the aluminum oxide particles is 1: 1.
In this case, it is considered that the resin and the aluminum oxide particles are connected in series, and the heat transfer distance between them is L / 2. Therefore, the thermal resistance R2 at this time is expressed as follows.

[0011]

R2 = (L / 2) / (λf · A) + (L / 2) / (λal · A) = 250 × L / (λal · A) + 0.5 × L / (λal · A) = 250.5 × L / (λal · A) In FIG. 8, the thermal resistance R3 when the coil end and the motor housing are assumed to be directly connected by a copper member is expressed as follows.

[0012]

R3 = L / (λcu · A) = 0.5 × L / (λal · A) As is clear from the above, when aluminum oxide particles and the like are added to the resin as disclosed in JP-A-5-236705. Is lower than the thermal resistance R1 when only the resin is used. However, the thermal resistance R2 is considerably larger than the metal thermal conduction as shown by the thermal resistance R3.

As described above, a considerably large gap space has conventionally been provided around the coil end of the stator coil in consideration of the large dimensional variation of the coil end. And, since the heat of the stator coil was radiated to the gap, the heat radiation was low. Although it has been proposed to fill the gap space with a resin or the like as described in the above-mentioned publication, the degree of reduction in thermal resistance by this technique has been low.

The present invention has been made in view of the above prior art. The purpose is to provide a motor that can effectively transfer the heat generated in the stator coil to the motor housing and significantly improve the heat dissipation of the stator coil compared to conventional motors. Is to do.

[0015]

According to the present invention, there is provided a motor having a stator having a stator body provided in a motor housing, a stator coil wound around the stator body, and rotatably inserted in the stator. And a rotor. The motor has an insulating resin layer provided on a surface of a coil end portion protruding from the stator body in a gap between an end surface of the stator body and an inner wall surface of the motor housing. A non-magnetic heat transfer member, which is disposed so as to be in contact with and thermally connects the two, and has higher thermal conductivity than the insulating resin. And transmitted to the motor housing through the non-magnetic heat transfer member.

The non-magnetic heat transfer member is, for example, aluminum or copper. Preferably, the nonmagnetic heat transfer member includes a deformable member made of a nonmagnetic metal, which is elastic and can be deformed in accordance with a gap between the insulating resin layer and the motor housing. Specific examples of such a deformable member include a metal wire formed into a lump and a thin metal plate formed into a wavy shape.

According to the present invention, the heat of the stator coil is released through the nonmagnetic heat transfer member having higher heat conductivity than a resin such as aluminum or copper. Since the non-magnetic heat transfer member occupies most of the heat transfer path to the housing, the heat resistance of the heat transfer path is reduced. Further, if an iron member is provided between the coil end and the housing, eddy current may be generated and the iron member may generate heat. However, in the present invention, since a non-magnetic material member such as aluminum is used, the heat generation as described above is performed. there is no problem.

In the present invention, the non-magnetic heat transfer member includes an elastic and flexible metal deformable member. The dimensions of the coil end of the motor greatly vary, and the gap size around the coil end also varies greatly. However, according to the present invention, the variation in the gap size described above is absorbed by the deformable member. Further, since the vibration of the housing is absorbed by the deformation of the deformable member, the transmission of the vibration of the housing to the coil end is small. As described above, according to the present invention, the non-magnetic heat transfer member can be appropriately arranged even in a situation where the dimensional variation is large, and the load on the vibrating surface is not applied to the coil end.

As described above, according to the present invention, the heat generated in the stator coil can be directly radiated through the nonmagnetic heat transfer member, and the heat radiation of the stator coil can be suitably improved. , The demagnetization of the rotor magnet due to a rise in temperature and the like can be avoided, and the performance of the motor can be improved.

Preferably, in the present invention, a nonmagnetic metal sheet is interposed between the deformable metal member and the insulating resin layer. For example, an insulating resin layer is formed by applying a thin resin material on one side of a non-magnetic metal sheet,
This sheet may be placed over the coil end. According to this aspect, insulation between the coil end and the nonmagnetic heat transfer member can be reliably and easily achieved, and the thickness of the insulating resin layer can be reduced as much as possible.

In the present invention, preferably, an insulating resin material is injected so as to fill the gap between the end face of the stator main body and the inner wall surface of the motor housing and surround the periphery of the nonmagnetic heat transfer member.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention (hereinafter, referred to as embodiments) will be described below with reference to the drawings. FIG. 1 shows a cross section of the motor of the present embodiment. In the figure, the motor 10 is arranged such that the rotation axis is horizontal. Hereinafter, the left side in the figure is called a front (front side) and the right side is called a rear (rear side). The motor 10
A motor housing 12, a stator 14 mounted in the housing, and a rotor 1 inserted in the stator 14;
6.

The motor housing 12 has a cylindrical housing body 18 corresponding to the outer peripheral portion of the motor.
It has a disk-shaped front flange 20 and a rear flange 22 attached to the front side and the rear side of the housing body 18, respectively. The front flange 20 and the rear flange 22 each correspond to a lid that closes the opening of the cylinder. The housing body 18 and the flanges 20, 22 are both made of aluminum.

The outer peripheral cylindrical portion of the housing body 18 has a double structure as shown in the drawing, and is provided with an outer cylindrical portion 18a and an inner cylindrical portion 18b.
4. The inner cylindrical portion 18b is bent toward the center at the front end, and a ring-shaped front wall portion 18c is provided at this portion. Further, a front bearing holding wall 18d is provided continuously to the center side of the front wall portion 18c. The front bearing holding wall 18d has a cylindrical shape concentric with the outer cylindrical portions 18a and 18b, and holds the front bearing 28a on the inner circumferential side.

The front wall portion 18c of the housing body 18 is provided so as to face the front flange 20 at a predetermined distance. Therefore, the water jacket 24
From between the outer tube portion 18a and the inner tube portion 18b, the front wall portion 18
It bends between c and the front flange 20. The water jacket 24 is covered with a disk-shaped, ring-shaped jacket lid 26 from the front side. An O-ring 2 for sealing cooling water is provided between the outer peripheral surface and the inner peripheral surface of the jacket lid 26 and the jacket wall surface.
6a and 26b are sandwiched. The front surface of the jacket lid 26 and the rear surface of the front flange 20 are in contact with each other. In addition, the motor housing 12 is provided with a cooling water inlet and a drain (not shown) so as to communicate with the water jacket 24.

The rear flange 22 is bent in the front direction on the center side, and has a cylindrical rear bearing holding wall 22a at this portion. The rear bearing holding wall 22a holds a rear bearing 28b that supports the rotor 16 similarly to the front bearing holding wall 18d described above.

Inside the housing 12, a stator 14 is provided.
Is attached. Stator body 3 of stator 14
Numeral 0 has a cylindrical shape and is formed by laminating a plurality of ring-shaped steel plates. The outer diameter of the stator body 30 is set substantially equal to the inner diameter of the housing body 18. A step 3 for positioning is provided on the inner peripheral surface of the inner cylindrical portion 18b.
2, the stator 14 is positioned in the motor rotation axis direction by abutting the stator body 30 against the step 32.

Although not shown in FIG. 1, the stator body 30
As is well known, a slot is provided on the inner peripheral side as a plurality of parallel grooves in the motor rotation axis direction. And
The stator winding is wound so as to fit into the slot, thereby forming the stator coil 34.
As described above, the stator coil 34 protrudes from the end surface of the stator main body 30 in a loop shape, and the protruding portion is the coil end 34a. In FIG. 1, the coil end 34a
Is cut at the center of the loop.

The stator 14 has a rotor 16 inserted therein. The rotor 16 has a cylindrical rotor body 36,
A rotor shaft 36a is inserted and fixed in a central hole of the rotor main body 36, and a rotor magnet 36b is fixed to an outer peripheral portion of the rotor main body 36. Rotor shaft 36a
Are supported by a front bearing 28a and a rear bearing 28b attached to the motor housing 12. The outer peripheral surface of the rotor 16 faces the inner peripheral surface of the stator 14 with a certain gap.

FIG. 2 shows the vicinity of the coil end of the stator coil 34 in an enlarged manner. An axial end face 30a of the stator main body 30, an inner cylindrical portion 18b of the housing main body 18,
A stator end gap 40 is formed by the front wall portion 18c and the front bearing holding wall 18d. The stator end gap 40 extends around the motor rotation axis, and has a ring shape. The coil end 34a is connected to the stator body 30.
, And project into the stator end gap 40. An insulating resin layer 42 made of an insulating resin is provided on the surface of the coil end 34a. As shown in FIG.
Although it is shown thicker for easy understanding, the actual thickness is set to about 0.2 to 0.3 mm. A coil end cover 44 is provided on the insulating resin layer 42 so as to cover the resin layer. Coil end cover 44
As a material of the non-magnetic material, a nonmagnetic metal such as aluminum or copper is preferable, and copper is employed in the present embodiment.
The coil end cover 44 is thin and has flexibility. As shown in the enlarged view of FIG.
Numeral 4 is bent so that the insulating resin layer 42 has a substantially constant thickness corresponding to the unevenness of the coil end 34a.

A heat transfer spacer 46 is disposed between the coil end cover 44 and the front wall 18c of the housing body 18. The heat transfer spacer 46 is provided at the stator end gap 40.
Has a ring shape corresponding to the shape of. Heat transfer spacer 46
As the material of the non-magnetic material, a non-magnetic metal such as aluminum or copper is suitable as in the coil end cover 44. In the present embodiment, the heat transfer spacer 46 is formed by bending a copper plate, and has a corrugated cross-sectional shape as shown in FIG. Thus, the heat transfer spacer 46 has elasticity in the thickness direction, is deformable, and functions as a spring. Before the heat transfer spacer 46 is attached to the motor, the thickness of the heat transfer spacer 46 is determined by the coil end 34a and the front wall portion 18c.
Is set to be larger than the gap. Therefore, when the heat transfer spacer 46 is attached to the motor, the heat transfer spacer 46 is sandwiched between the coil end cover 44 and the front wall portion 18c, and is contracted and deformed in the thickness direction (the motor rotation axis direction). The heat transfer spacer 46 is formed between the coil end cover 44 and the front wall 1.
8c is in direct contact with both wall surfaces. The heat transfer spacer 46 and the coil end cover 44 correspond to the non-magnetic heat transfer member of the present invention.

The periphery of the heat transfer spacer 46 is surrounded by a resin material 48. The resin material 48 is filled in the stator end gap 40. The resin material 48 also goes around the gap between the coil end 34a and the end face 30a of the stator body 30 and the gap between the windings of the coil end 34a. FIG. 4 is a sectional view of the stator 14 cut at right angles to the axial direction. As shown in the drawing, the resin material 48 is also filled between the wall surface of the slot 50 on the inner peripheral side of the stator main body 30 and the stator coil 34 and between the windings of the stator coil 34.

FIG. 5 shows a modification of this embodiment. The heat transfer spacer 46a of FIG. 5 is formed by forming a nonmagnetic metal wire such as aluminum or copper into a block. The metal wire is not in the form of a dense lump, and therefore, even in the example of FIG. 5, the heat transfer spacer 46a is easily deformable and has elasticity.
The heat transfer spacer 46 is connected to the coil end cover 44.
And the wall surface of the front wall portion 18c, and is in direct contact with both. Therefore, the coil end cover 44 and the front wall portion 18c are thermally directly connected by the heat transfer spacer 46.

The configuration of the motor 10 has been described above. Although the front side has been described in FIGS. 2 and 5, the coil end cover 44 and the heat transfer spacer 46 are similarly provided on the rear side. However, as will be described later, the rear side is different from FIGS. 2 and 5 in that the resin material is only on the front side from the line X in FIG.

Next, a method of manufacturing the motor 10 will be described.
An insulating resin material is applied to one side of the coil end cover 44 which is a circular ring-shaped sheet to a thickness of about 0.2 to 0.3 mm. A coil end cover 44 is attached to the coil ends 34a at both ends in the axial direction of the stator 14 separately prepared.
Put on. At this time, the resin material applied above is sandwiched between the coil end cover 44 and the coil end 34a. Thus, the applied resin material layer becomes the insulating resin layer 42. Then, the coil end cover 44
Is bent according to the outer shape of the coil end 34a, and is bent according to the unevenness of the surface of the coil end 34a as shown in FIG. 3, so that the insulating resin layer 42 and the coil end 34a are brought into close contact with each other as much as possible.

On the other hand, the jacket lid 26 is assembled to the housing main body 18, and the housing main body 18 and the front flange 20 are brought into contact. The front flange 20 and the housing body 18 are placed on a workbench such that the front flange 20 is located on the lower side. Then, the heat transfer spacer 46 is inserted into the stator end gap 40 from above (that is, from the rear side). Next, the stator 14 to which the coil end cover 44 is attached is inserted from above, and the end surface 30 a of the stator main body 30 is abutted against the positioning step 32 provided on the inner peripheral surface of the housing main body 18. At this time, the heat transfer spacer 46 is deformed in the axial direction, so that the heat transfer spacer 46 comes into contact with both the coil end cover 44 and the flange body 18. Another heat transfer spacer 46 is placed on the coil end cover 44 on the upper side.

Next, a molten resin material 48 is injected from above (that is, from the rear side), and the resin material 48 is injected into the stator end gap 40 on the front side and the slot provided in the inner peripheral surface of the stator body 30. Fill inside. At this time, an injection jig having the same outer shape as the inner diameter of the rotor insertion portion at the center of the stator body 30 is inserted into the rotor insertion portion. The end face of the injection jig is abutted against the front bearing holding wall 18d. This prevents the resin material 48 from leaking to locations other than the stator end gap 40 and the slot 50. In this injection step, the resin material 48 is injected up to the line X shown in FIG. That is, the resin material 48 is injected until a part of the rear heat transfer spacer 46 is immersed.

Next, the rotor 16 is inserted into the stator 14. At this time, the rotor shaft 36a is passed through the front bearing 28a held by the housing body 18. And
The rear flange 22 is brought into contact with the housing body 18.
At this time, the rear bearing 28b held by the rear flange 22
The rotor shaft 36a fits into the shaft. The heat transfer spacer 4
6 is deformed in the axial direction. Therefore, the heat transfer spacer 46
It contacts both the coil end cover 44 and the rear flange 22. Then, the front flange 20, the housing body 18, and the rear flange 22 are fixed using fixing means (not shown).

The motor 10 is completed by the method described above. Next, the heat radiation effect of the stator 14 of the motor 10 will be described.

During motor operation, the stator body 30 generates heat due to iron loss. This heat (hereinafter referred to as iron loss heat) is mainly transmitted from the outer peripheral surface of the stator main body 30 to the inner cylindrical portion 18b of the motor housing 12. Then, the iron loss heat is transmitted to the cooling water circulating in the water jacket 24 and is released to the outside.

When the motor is operating, the stator coil 34
Generates heat due to copper loss. This heat (hereinafter referred to as copper loss heat)
Is transmitted to the coil end cover 44 via the insulating resin layer 42 as indicated by an arrow a in FIG. Then, as shown by arrows “b” and “c”, the copper loss heat indicates the coil end cover 44.
From the heat transfer spacer 46, from the heat transfer spacer 46 to the front wall 18c of the housing body 18, and further to the cooling water in the water jacket 24. On the rear side, the copper loss heat is transmitted from the heat transfer spacer 46 to the rear flange 22 and further discharged into the air or transmitted to the cooling water in the water jacket 24. Further, the copper loss heat transmitted to the coil end cover 44 is transferred to the heat transfer spacer 46.
In addition, heat is radiated through the resin material 48. Further, the copper heat loss is transmitted from the stator coil 34 to the stator body 30 via the resin material 48 in the slot 50, and is radiated from the outer peripheral portion of the stator body 30 in the same manner as the iron loss heat.

Referring to the schematic diagram of FIG. 6, the thermal resistance between the coil end and the motor housing in the motor of the present embodiment is roughly determined. As described above, the thermal resistance R is calculated by using the thermal conductivity λ, the heat transfer distance L, and the heat transfer area A, and R = L /
(λ · A). The heat transfer spacer 46 is made of copper as described above. It is also assumed that 10% of the area of the coil end cover 44 is in direct contact with the heat transfer spacer 46. Therefore, although schematically, the heat transfer area A
It can be said that the heat transfer spacer 46 occupies 10% and the resin material 48 occupies the remaining 90%. In this case, the resin material 48
The heat transfer spacers 46 are provided in parallel as shown in FIG. 6, and the ratio of the heat transfer areas of the two is considered to be 9: 1. Therefore, the thermal resistance R4 at this time is expressed as follows, where Ra is the thermal resistance of the resin portion and Rb is the thermal resistance of the copper portion.

[0043]

1 / R4 = 1 / Ra + 1 / Rb = (λf · 0.9A) / L + (λcu · 0.1A) / L = (1/500 · λal · 0.9A) / L + (2 · λal · 0.1A) /L=0.2018× (λal · A) / L Therefore, it is considered that the thermal resistance R4 is about five times that in the case where the coil end and the motor housing are directly connected with aluminum. Although schematically, when the stator end gap is filled only with the resin (heat resistance R1), the heat resistance R4 in the present embodiment is smaller than that when the resin to which aluminum oxide particles are added is filled (heat resistance R2). It turns out that it has fallen sharply.

The preferred embodiment of the present invention has been described above. According to the present embodiment, as described below,
While satisfying the following requirements (1) to (3), the heat resistance of the heat-dissipating path of the coil end can be significantly reduced to improve the heat-dissipating property; (1) Ensuring insulation between the coil end and the housing (2) Prevention of generation of eddy current in the spacer member in the gap between the stator ends. (3) A configuration in which dimensional variations of the coil end can be tolerated.

(1) Since the insulating resin layer 42 is interposed between the coil end cover 44 and the coil end 34a, the insulation between them is ensured. The insulating resin layer 42 is provided by applying a resin material to one surface of the coil end cover 44. By reducing the applied thickness of the resin material, the thermal resistance of the insulating resin layer 42 can be considerably reduced.

(2) As a material of the heat transfer spacer 46 and the coil end cover 44, copper, which is a nonmagnetic metal and has a small electric resistance, is employed. For example, if these members are made of iron, an eddy current is generated during motor operation. Then, since the iron member generates heat due to the eddy current, it may be difficult to cool the coil end. In contrast, in the present embodiment,
Since the nonmagnetic metal is used, the heat of the coil end 34a can be preferably transmitted without any problem of heat generation due to the eddy current.

(3) The coil end cover 44 is thin and flexible. Therefore, although the shape of the coil end cover 44 is not constant and the surface has irregularities, as shown in FIG. 3, the insulating resin layer 42 is a uniform and thin layer in most parts. In addition, an elastic heat transfer spacer 46 is disposed between the coil end cover 44 and the housing,
The heat transfer spacer 46 is compressed during assembly. Therefore, the heat transfer spacer 46 is in close contact with the coil end cover 44 and the housing, even though the dimensional variation of the coil end cover 44 is large. Further, since the heat transfer spacer 46 has elasticity, the vibration of the housing is not directly transmitted to the coil end, and the load on the coil end is reduced.

As described above, the requirements (1) to (3) are satisfied, and the coil end and the housing are connected by the metal member (excluding the insulating resin layer). Further, the coil end cover is pressed against the coil end by the spring force of the heat transfer spacer, the insulating resin layer becomes thinner, and the coil end cover approaches the coil end. In addition, the contact area between the spacer itself, the coil end, and the housing increases due to the elastic deformation of the heat transfer spacer.

As described above, it is possible to suitably improve the heat dissipation of the coil end, extend the life of the motor, etc., without impairing the performance of the motor and permitting the dimensional variation of the coil end.

[Brief description of the drawings]

FIG. 1 is a sectional view of a motor according to an embodiment of the present invention.

FIG. 2 is an enlarged view near a coil end of the motor of FIG.

FIG. 3 is an enlarged view of the coil end of FIG. 2;

FIG. 4 is a sectional view of a stator of the motor of FIG. 1;

FIG. 5 is an enlarged view of the coil end of FIG. 1, illustrating a heat transfer spacer according to a modified example of the embodiment.

FIG. 6 is a schematic diagram used to determine a thermal resistance between a coil end and a housing in the motor of FIG. 1;

FIG. 7 is a sectional view showing the vicinity of a coil end at an end of a stator of a conventional general motor.

FIG. 8 is a schematic diagram used to determine thermal resistance between a coil end and a housing in a conventional motor.

[Explanation of symbols]

Reference Signs List 10 motor, 12 motor housing, 14 stator, 16 rotor, 18 housing body, 20 front flange, 22 rear flange, 24 water jacket, 30 stator body, 34 stator coil, 34a coil end, 40 stator end gap, 4
2 insulating resin layer, 44 coil end cover, 46,
46a Heat transfer spacer, 48 resin material, 50 slots.

Claims (4)

[Claims] 1. A motor comprising: a stator having a stator body provided in a motor housing; a stator having a stator coil wound around the stator body; and a rotor rotatably inserted in the stator. An insulating resin layer provided on the surface of the coil end portion projecting from the stator body in a gap between the motor housing inner wall surface and the motor housing inner wall surface; and an insulating resin layer disposed so as to contact the insulating resin layer and the motor housing inner wall surface. A non-magnetic heat transfer member having a higher thermal conductivity than the insulating resin, thermally connected to the motor, wherein heat generated in the stator coil is transferred to the motor via the insulating resin layer and the non-magnetic heat transfer member. A motor transmitted to a housing. 2. The motor according to claim 1, wherein the nonmagnetic heat transfer member has elasticity and can be deformed in accordance with a gap between the insulating resin layer and the motor housing.
A motor comprising a deformable member made of a nonmagnetic metal. 3. The motor according to claim 2, wherein a nonmagnetic metal sheet is interposed between the deformable metal member and the insulating resin layer. 4. The motor according to claim 2, wherein an insulating resin material is filled so as to fill a gap between an end face of the stator main body and an inner wall surface of the motor housing and surround a periphery of the nonmagnetic heat transfer member. A motor characterized by being injected.