JP2022027230A - Rotary electric machine - Google Patents

Abstract

To suitably cool a rotor while reducing a loss of the rotor.SOLUTION: A stator 21 is provided inside a housing 11, and has a cylindrical stator core 31 and a coil 30 wound around the stator core 31. A rotor 22 is provided inside the housing 11, and is rotatable by flowing electric current to the coil 30. A refrigerant circuit 62 flows a refrigerant inside the housing 11. The rotor 22 is arranged inside the stator core 31 in a radial direction. A resin member 40 is provided between the rotor 22 and the stator core 31 in the radial direction in a state where a gap constituting the refrigerant circuit 62 is formed between the resin member 40 and the rotor 22 in the radial direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a rotary electric machine.

The rotary electric machine described in Patent Document 1 includes a stator and a rotor provided inside the housing. The stator has a cylindrical stator core. The rotor is located inside the stator core.

Further, the temperature of the rotor rises due to heat generation as it rotates. Therefore, as a rotary electric machine, there is also known to include a refrigerant circuit in which a refrigerant flows inside a housing for the purpose of cooling the rotor.

Japanese Unexamined Patent Publication No. 2002-209354

By the way, in a high-speed rotary electric machine, it may be desirable to set a large separation distance between the rotor and the stator core in the radial direction of the stator core in order to reduce the loss of the rotor. However, if the gap between the rotor and the stator core is increased by increasing the separation distance, the flow velocity of the refrigerant flowing through the gap becomes low. Therefore, the cooling effect of the rotor by the refrigerant may be reduced.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a rotary electric machine capable of suitably cooling a rotor while reducing a loss of the rotor.

The rotary electric machine for solving the above problems includes a stator provided inside the housing, a stator having a tubular stator core, a rotor provided inside the housing, and a refrigerant circuit for flowing a refrigerant inside the housing. In a rotary electric machine, when the direction in which the axis of the stator core extends is the axial direction and the direction orthogonal to the axial direction is the radial direction, the rotor is arranged inside the stator core in the radial direction. It is characterized by comprising a resin member provided between the rotor and the stator core in the radial direction in a state of forming a gap constituting the refrigerant circuit between the rotor and the rotor in the radial direction.

According to the above configuration, the rotor is cooled by the refrigerant flowing through the gap formed between the rotor and the resin member. The rotor and the stator core are separated by the amount of the gap between the rotor and the resin member and the radial dimension of the resin member. Therefore, by providing the resin member, the separation distance between the rotor and the stator core can be increased without increasing the gap through which the refrigerant flows. Therefore, it is possible to suitably cool the rotor while reducing the loss of the rotor.

In a rotary electric machine, it is preferable that the resin member has an inclined surface that is inclined with respect to the rotor when the cross section along the axial direction is viewed.
If the size of the gap between the rotor and the resin member is uniform in the axial direction, the following inconveniences may occur. That is, when the rotor has temperature unevenness in the axial direction, the high temperature portion of the rotor may not have a sufficient cooling effect by the refrigerant. Further, when the temperature of the refrigerant rises significantly due to the heat from the rotor while the refrigerant flows through the gap between the rotor and the resin member, the rotor is axially separated from the inflow portion where the refrigerant flows in the gap. There is a possibility that the sufficient cooling effect of the refrigerant cannot be obtained as much as the portion.

According to the above configuration, the gap between the rotor and the resin member has a portion where the dimension in the radial direction gradually decreases in the axial direction. As a result, as described above, the size of the gap can be set small around the part of the rotor where a sufficient cooling effect may not be obtained when the size of the gap is made uniform. A sufficient cooling effect can be obtained as a whole.

In a rotary electric machine, the stator core is made by laminating a plurality of electromagnetic steel sheets, and the resin member is formed along a first resin portion extending in the laminating direction of the electromagnetic steel sheets and both end faces of the stator core in the laminating direction. It is preferable to have a second resin portion that extends.

When the stator core is made of a laminated product of a plurality of electromagnetic steel sheets, if the electromagnetic steel sheets are separated from each other, the density of the stator core decreases, and the output of the rotary electric machine may decrease. According to the above configuration, since the plurality of electromagnetic steel sheets can be supported in the laminating direction by the second resin portion, the separation between the electromagnetic steel sheets can be suppressed.

According to the present invention, it is possible to suitably cool the rotor while reducing the loss of the rotor.

Sectional drawing which shows the rotary electric machine schematically. FIG. 2 is a cross-sectional view showing a cross section of a stator, a rotor, and a resin member in line 2-2 of FIG. A cross-sectional view showing an enlarged view of the vicinity of the gap between the rotor and the resin member. In another example, a cross-sectional view showing an enlarged view of the vicinity of the gap between the rotor and the resin member.

Hereinafter, one embodiment of the rotary electric machine will be described with reference to FIGS. 1 to 3.
As shown in FIG. 1, the rotary electric machine 10 includes a cylindrical housing 11 having an internal space and an electric motor 20 housed in the housing 11. The housing 11 includes a plate-shaped first housing structure 12 and a bottomed cylindrical second housing structure 13 connected to the first housing structure 12. The first housing structure 12 and the second housing structure 13 are made of a metal material, for example, aluminum. The second housing structure 13 has a plate-shaped bottom wall 13a and a peripheral wall 13b extending in a cylindrical shape from the outer peripheral portion of the bottom wall 13a. The first housing structure 12 is connected to the second housing structure 13 in a state where the opening on the peripheral wall 13b opposite to the bottom wall 13a is closed.

A housing hole 12h is formed in the first housing structure 12 so as to penetrate in the thickness direction. The housing hole 12h is a circular hole. Further, a cylindrical first boss portion 12c is provided so as to project from the inner surface of the first housing structure 12. A cylindrical second boss portion 13c is provided so as to project from the inner surface of the bottom wall 13a of the second housing structure 13. The axes of the housing hole 12h, the first boss portion 12c, and the second boss portion 13c are aligned with each other.

The electric motor 20 includes a stator 21 and a rotor 22. Both the stator 21 and the rotor 22 are provided inside the housing 11. The stator 21 has a cylindrical stator core 31 fixed to the inner peripheral surface of the peripheral wall 13b of the second housing structure 13, and a coil 30 wound around the stator core 31. The stator core 31 is configured by laminating a plurality of electromagnetic steel sheets 31c. The rotor 22 is arranged inside the stator core 31 in the radial direction of the stator 21. Then, the rotor 22 is rotatable by the current flowing through the coil 30. In the following, the direction in which the axis of the stator core 31 extends is referred to as an axial direction, and the direction orthogonal to the axial direction is referred to as a radial direction.

The rotor 22 includes a tubular member 23, a permanent magnet 24 which is a magnetic material, and a rotating shaft 25. The tubular member 23 has a cylindrical shape whose axis extends linearly. The axis of the tubular member 23 coincides with the axis of the housing hole 12h, the first boss portion 12c, and the second boss portion 13c, and extends in the axial direction. The tubular member 23 has a first opening 23a at one end in the axial direction and a second opening 23b at the other end in the axial direction. The tubular member 23 is made of a metal material, for example, titanium.

The permanent magnet 24 has a solid columnar shape and is magnetized in the radial direction. The permanent magnet 24 is fixed in the tubular member 23 by being press-fitted into the inner peripheral surface of the tubular member 23. The axis of the permanent magnet 24 coincides with the axis of the tubular member 23. The axial length of the permanent magnet 24 is shorter than the axial length of the tubular member 23.

The rotating shaft 25 includes a columnar first shaft portion 26 located on one side in the axial direction of the permanent magnet 24 and a columnar second shaft portion 27 located on the other side of the permanent magnet 24 in the axial direction. , Have. The first shaft portion 26 and the second shaft portion 27 are made of, for example, metal. The first small-diameter shaft portion 26 has a first small-diameter shaft portion 26a, a first large-diameter shaft portion 26b that is aligned with the first small-diameter shaft portion 26a in the axial direction and has a larger diameter than the first small-diameter shaft portion 26a. The axes of the first small diameter shaft portion 26a and the first large diameter shaft portion 26b extend along the axial direction. The second shaft portion 27 has a second small diameter shaft portion 27a and a second large diameter shaft portion 27b that is aligned with the second small diameter shaft portion 27a in the axial direction and has a larger diameter than the second small diameter shaft portion 27a. The axis of the second small diameter shaft portion 27a and the second large diameter shaft portion 27b extends along the axial direction. The first small diameter shaft portion 26a and the second small diameter shaft portion 27a have the same diameter. The first large-diameter shaft portion 26b and the second large-diameter shaft portion 27b have the same diameter.

The first large-diameter shaft portion 26b is inserted into the housing hole 12h in the first housing structure 12 and is located inside the first boss portion 12c. The second large diameter shaft portion 27b is located inside the second boss portion 13c. Further, the first small diameter shaft portion 26a is fixed to the cylinder member 23 in a state where the first opening 23a is closed by being inserted into the first opening 23a of the cylinder member 23. The second small diameter shaft portion 27a is fixed to the cylinder member 23 in a state where the second opening 23b is closed by being inserted into the second opening 23b of the cylinder member 23. As a result, the first shaft portion 26 and the second shaft portion 27 can rotate integrally with the tubular member 23 and the permanent magnet 24. The axes of the first shaft portion 26 and the second shaft portion 27, that is, the axes of the rotating shaft 25, coincide with the axes of the tubular member 23. The axis of the rotating shaft 25 is shown as the axis L.

The rotor 22 is rotatably supported with respect to the housing 11 by a pair of air bearings 29. The pair of air bearings 29 are provided between the inner peripheral surface of the first boss portion 12c and the outer peripheral surface of the first large diameter shaft portion 26b, and the inner peripheral surface of the second boss portion 13c and the second large diameter shaft portion 27b. It is provided between the outer peripheral surface and the outer peripheral surface, respectively.

The rotary electric machine 10 includes a compression unit 63 for compressing the refrigerant. The housing 11 includes a supply port 60 to which the refrigerant is supplied and a discharge port 61 for discharging the compressed refrigerant. The supply port 60 is a hole that opens inside the housing 11. The compression unit 63 sucks in the refrigerant by the rotational force generated by the rotation of the rotor 22, compresses the refrigerant, and then discharges the refrigerant from the discharge port 61. The rotary electric machine 10 includes a refrigerant circuit 62 for flowing a refrigerant inside the housing 11. The refrigerant circuit 62 includes a supply port 60, an internal space of the housing 11, a discharge port 61, and an external refrigerant circuit 65 located outside the housing 11 so as to connect the discharge port 61 and the supply port 60. The external refrigerant circuit 65 has, for example, a heat exchanger, an expansion valve, and the like. In the present embodiment, the refrigerant is compressed by the compression unit 63, and the heat exchange and expansion of the refrigerant are performed by the external refrigerant circuit 65 to cool and heat the inside of the vehicle. As the compression unit 63, any type of compression unit such as a scroll type, a piston type, and a vane type can be used.

Next, the stator core 31 will be described in more detail.
As shown in FIG. 2, the stator core 31 includes a cylindrical yoke 32 and a plurality of teeth 33 extending radially inward from the yoke 32. The outer peripheral ends of the electrical steel sheets 31c are fixed to each other by welding the outer peripheral ends of the yokes 32 to each other. The direction in which the axis of the yoke 32 extends coincides with the axial direction of the stator core 31. That is, the direction in which the axis of the stator core 31 extends is also the direction in which the axis of the yoke 32 extends. The radial direction of the stator core 31 is also the radial direction of the yoke 32. Further, the stacking direction of the plurality of electromagnetic steel sheets 31c is along the axial direction.

The teeth 33 includes a winding portion 34 around which the coil 30 is wound, and a tip portion 35 located inside the winding portion 34 in the radial direction. A coil 30 is wound around the winding portion 34 via an insulator made of an insulating material (not shown). The stator core 31 and the coil 30 are insulated from each other by an insulator. The tip portion 35 is a portion of the teeth 33 exposed from the insulator, and is a portion in which the coil 30 is not wound.

The tip portion 35 has a substantially rectangular columnar shape extending in the axial direction. Further, the tip portion 35 extends from the inner end portion in the radial direction of the winding portion 34 to both sides in the circumferential direction of the yoke 32. Further, the tip portions 35 are separated from each other in the circumferential direction of the yoke 32 by the teeth 33 adjacent to each other in the circumferential direction of the yoke 32.

As shown in FIGS. 1 and 3, the end faces of the tip end portion 35 of the stator core 31 are the first end face 35a and the second end face 35b in the axial direction which is the stacking direction of the plurality of electromagnetic steel sheets 31c. Of both end faces of the tip end portion 35 of the stator core 31, the first end face 35a is the end face of the electrical steel sheet 31c located closest to the first housing structure 12 in the axial direction. The second end surface 35b is the end surface of the electromagnetic steel sheet 31c located closest to the bottom wall 13a side of the second housing structure 13 in the axial direction. A tip surface 35c, which is also an inner peripheral surface of the teeth 33, is provided between the first end surface 35a and the second end surface 35b. The tip surface 35c is the inner peripheral end surface of the tip portion 35 composed of the inner peripheral end faces of the plurality of electrical steel sheets 31c. In the present embodiment, the tip surface 35c extends along the outer peripheral surface of the tubular member 23 at a position radially outwardly separated from the outer peripheral surface of the tubular member 23 by the first dimension L1.

Next, the resin member 40 provided between the rotor 22 and the stator core 31 will be described.
As shown in FIGS. 2 and 3, the rotary electric machine 10 includes a resin member 40 between the rotor 22 and the stator core 31 in the radial direction. More specifically, the resin member 40 is provided between the tubular member 23 in the radial direction and the tip portion 35 of each tooth 33. The resin member 40 includes a cylindrical first resin portion 41 and a pair of second resin portions 42 extending in a disk shape from both ends in the axial direction of the first resin portion 41 to the outside of the first resin portion 41. Have.

The axis of the first resin portion 41 extends in the stacking direction of the plurality of electromagnetic steel sheets 31c and coincides with the axis of the yoke 32. Further, the first resin portion 41 is located so as to face the outer peripheral surface of the cylinder member 23 inside the resin outer peripheral surface 41b extending along the tip surface 35c of each tooth 33 in the radial direction from the resin outer peripheral surface 41b. It has a resin inner peripheral surface 41a. The pair of second resin portions 42 extend along the first end surface 35a and the second end surface 35b of the tip portion 35 of the stator core 31, respectively. Further, the resin outer peripheral surface 41b of the first resin portion 41 is fixed to the tip surface 35c of the teeth 33. The pair of second resin portions 42 are fixed to the first end surface 35a and the second end surface 35b of the tip portion 35 of the stator core 31, respectively. As a result, the resin member 40 of the present embodiment is fixed to the stator core 31.

As shown in FIG. 3, when looking at the cross section of the resin member 40 along the axial direction, the resin inner peripheral surface 41a of the first resin portion 41 is inclined with respect to the outer peripheral surface of the tubular member 23. Specifically, when looking at the cross section of the resin member 40 along the axial direction, the resin inner peripheral surface 41a becomes a tubular member as it approaches the intermediate position 41c from the end position 41d of the resin inner peripheral surface 41a in the axial direction. It is inclined so as to approach the outer peripheral surface of 23. As a result, the resin inner peripheral surface 41a is curved so as to be convex inward in the radial direction. In the present embodiment, the resin inner peripheral surface 41a corresponds to an inclined surface that is inclined with respect to the rotor 22.

At the intermediate position 41c, the dimension in the radial direction between the resin outer peripheral surface 41b and the resin inner peripheral surface 41a is the second dimension L2. At the end position 41d, the dimension in the radial direction between the resin outer peripheral surface 41b and the resin inner peripheral surface 41a is the third dimension L3. The second dimension L2 is larger than the third dimension L3. The radial dimension of the resin member 40 gradually changes from the second dimension L2 to the third dimension L3 as it approaches the intermediate position 41c from the end position 41d in the axial direction.

Further, the second dimension L2 and the third dimension L3 are smaller than the first dimension L1, which is the separation distance between the outer peripheral surface of the tubular member 23 and the tip surface 35c of the teeth 33 in the radial direction. As a result, the resin member 40 forms a gap G between the resin member 40 and the outer peripheral surface of the tubular member 23 of the rotor 22 in the radial direction. At the end position 41d, the gap G between the resin outer peripheral surface 41b and the outer peripheral surface of the tubular member 23 is the largest in the radial direction. At the intermediate position 41c, the gap G between the resin outer peripheral surface 41b and the outer peripheral surface of the tubular member 23 is the smallest in the radial direction. The radial dimension of the gap G gradually changes as it approaches the intermediate position 41c from the end position 41d in the axial direction. That is, when the cross section of the resin member 40 is viewed along the axial direction, the dimension of the gap G in the radial direction gradually changes in the axial direction.

Next, the operation of this embodiment will be described.
When the rotary electric machine 10 is driven, the rotor 22 rotates, and the refrigerant is compressed by the compression unit 63. Then, inside the housing 11, the refrigerant flows from the supply port 60 toward the discharge port 61. At this time, the gap G between the resin member 40 and the rotor 22 also functions as a part of the refrigerant circuit 62. Specifically, on the second end surface 35b side of the tip portion 35 of the teeth 33, the gap G between the resin inner peripheral surface 41a at the end position 41d and the outer peripheral surface of the tubular member 23 is used as the refrigerant inflow portion G1. It will work. On the side of the first end surface 35a of the tip portion 35 of the teeth 33, the gap G between the resin inner peripheral surface 41a at the end position 41d and the outer peripheral surface of the tubular member 23 functions as the refrigerant outflow portion G2. .. In the gap G, the refrigerant flows from the inflow portion G1 toward the outflow portion G2 as shown by a white arrow in FIG.

Here, as the rotation shaft 25 rotates, the central position C of the permanent magnet 24 shown in FIG. 1 tends to become the hottest. Therefore, in the axial direction, the closer to the intermediate position between the permanent magnet 24 and the tubular member 23, the higher the temperature tends to be.

In the present embodiment, the dimension of the gap G in the radial direction is gradually changed as it approaches the intermediate position 41c from the end position 41d of the first resin portion 41 in the axial direction. The radial dimension of the gap G is the smallest at the intermediate position 41c. Therefore, at the intermediate position 41c in the axial direction, the flow velocity of the refrigerant flowing through the gap G can be maximized, so that the refrigerant having a high flow velocity can flow around the permanent magnet 24 and the tubular member 23, which tend to have high temperatures.

Further, the outer peripheral surface of the tubular member 23 in the rotor 22 and the tip surface 35c of the teeth 33 in the stator core 31 are separated by the amount of the gap G and the radial dimension of the resin member 40. Therefore, the separation distance between the rotor 22 and the stator core 31 can be increased without increasing the gap G through which the refrigerant flows.

According to this embodiment, the following effects can be obtained.
(1) The rotor 22 and the stator core 31 are separated by the amount of the gap G between the rotor 22 and the resin member 40 and the radial dimension of the resin member 40. Therefore, by providing the resin member 40, the separation distance between the rotor 22 and the stator core 31 can be increased without increasing the gap G through which the refrigerant flows. Therefore, the rotor 22 can be suitably cooled while reducing the loss of the rotor 22.

(2) The resin member 40 has a portion where the dimension of the gap G in the radial direction gradually decreases along the axial direction when the cross section along the axial direction is viewed. As a result, the size of the gap G is set small around the portion of the rotor 22 where a sufficient cooling effect may not be obtained when the size of the gap G in the radial direction is made uniform in the entire axial direction. Therefore, a sufficient cooling effect can be obtained for the entire rotor 22.

(3) Since the plurality of electromagnetic steel sheets 31c can be supported in the stacking direction by the second resin portion 42, the separation between the electromagnetic steel sheets 31c can be suppressed.
The above embodiment can be modified and implemented as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

○ As shown in FIG. 4, the dimension of the gap G in the radial direction may be gradually changed so as to be gradually reduced in the axial direction in the entire axial direction of the resin member 40. Specifically, at the end position 41d on the second end surface 35b side of the tip portion 35 of the teeth 33, the dimension in the radial direction between the resin outer peripheral surface 41b and the resin inner peripheral surface 41a is the fourth dimension L4. It has become. At the end position 41d on the first end surface 35a side of the tip portion 35 of the teeth 33, the dimension in the radial direction between the resin outer peripheral surface 41b and the resin inner peripheral surface 41a is the fifth dimension L5. The fourth dimension L4 is smaller than the fifth dimension L5. The radial dimension of the resin member 40 changes from the fourth dimension L4 to the fifth dimension L5 as it approaches the end position 41d on the second end surface 35b side to the end position 41d on the first end surface 35a side in the axial direction. It is gradually changing to become larger.

Further, the fourth dimension L4 and the fifth dimension L5 are smaller than the first dimension L1, which is the separation distance between the outer peripheral surface of the tubular member 23 and the tip surface 35c of the teeth 33 in the radial direction. As a result, even with the resin member 40 in this modification, a gap G is formed between the resin member 40 and the outer peripheral surface of the tubular member 23 of the rotor 22 in the radial direction. At the end position 41d on the second end surface 35b side, the gap G between the resin outer peripheral surface 41b and the outer peripheral surface of the tubular member 23 is the largest in the radial direction. At the end position 41d on the first end surface 35a side, the gap G between the resin outer peripheral surface 41b and the outer peripheral surface of the tubular member 23 is the smallest in the radial direction. The dimension of the gap G in the radial direction gradually changes as it approaches the end position 41d on the first end surface 35a side from the end position 41d on the second end surface 35b side in the axial direction. That is, the resin member 40 in this form also has a portion where the dimension of the gap G in the radial direction gradually decreases along the axial direction when the cross section along the axial direction is viewed. It has an inclined surface that is inclined. In this modified example, the resin inner peripheral surface 41a corresponds to the inclined surface.

The refrigerant flows into the gap G from the inflow portion G1 at the end position 41d on the second end surface 35b side, flows toward the outflow portion G2 at the end position 41d on the first end surface 35a side, and flows from the outflow portion G2 to the gap G2. It leaks to the outside of G. Therefore, when the temperature of the refrigerant greatly rises due to the heat from the rotor 22 while the refrigerant flows through the gap G, the refrigerant temperature in the inflow portion G1 is the lowest, and the closer to the outflow portion G2, the higher the refrigerant temperature. ..

In this modified example, the dimension of the gap G in the radial direction becomes smaller as it approaches the outflow portion G2 where the refrigerant temperature becomes higher. As a result, the closer to the outflow portion G2, the higher the flow velocity of the refrigerant flowing through the gap G. Therefore, it is possible to set the size of the gap G small around the portion of the rotor 22 where a sufficient cooling effect may not be obtained when the size of the gap G in the radial direction is made uniform in the entire axial direction. Therefore, a sufficient cooling effect can be obtained for the entire rotor 22.

○ By adopting the shape of the resin member 40 other than the embodiment shown in the above embodiment and the above modified example, when the cross section of the resin member 40 along the axial direction is viewed, the resin member 40 has a gap G in the radial direction. It may have an inclined surface that is inclined with respect to the rotor 22 so that the dimension of the rotor 22 gradually decreases in the axial direction. For example, a portion where the dimension of the gap G in the radial direction gradually decreases along the axial direction is located only in a part of the resin member 40 in the axial direction, and the dimension of the gap G in the radial direction is one in the other portion. It may be like.

○ The stator core 31 may be made of a single magnetic steel sheet 31c without being laminated in the axial direction.
○ The stator core 31 may be configured by connecting a plurality of divided cores having teeth 33 in the circumferential direction.

○ Of the pair of second resin portions 42, one or both of them may be omitted from the resin member 40.
○ The fixing target of the resin member 40 does not have to be the stator core 31. For example, the resin member 40 may be fixed to the housing 11.

G ... Gap, L ... Axis line, 10 ... Rotating machine, 11 ... Housing, 21 ... Stator, 22 ... Rotor, 30 ... Coil, 31 ... Stator core, 31c ... Electrical steel sheet, 40 ... Resin member, 41 ... First resin part, 42 ... Second resin part, 62 ... Refrigerant circuit.

Claims (3)

A stator provided inside the housing and having a cylindrical stator core,
A rotor provided inside the housing and
A rotary electric machine including a refrigerant circuit for flowing a refrigerant inside the housing.
When the direction in which the axis of the stator core extends is the axial direction and the direction orthogonal to the axial direction is the radial direction,
The rotor is arranged inside the stator core in the radial direction.
A rotary electric machine comprising a resin member provided between the rotor and the stator core in the radial direction in a state of forming a gap constituting the refrigerant circuit between the rotor and the rotor in the radial direction. The rotary electric machine according to claim 1, wherein the resin member has an inclined surface that is inclined with respect to the rotor when viewed in a cross section along the axial direction. The stator core is made by laminating a plurality of electromagnetic steel sheets.
The first or second aspect of the present invention, wherein the resin member has a first resin portion extending in the stacking direction of the electromagnetic steel sheet and a second resin portion extending along both end faces of the stator core in the stacking direction. Rotating electric machine.

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