Stator core, rotating electric machine, compressor, and refrigeration device

Abstract

To provide a stator core, a rotary electric machine, a compressor, and a refrigerator in which iron loss due to magnetic degradation is hard to occur.SOLUTION: A stator core 200 comprises: a cylindrical yoke part 210 provided inside a body 14 of a casing 13; a plurality of support parts 240 which support the yoke part 210 to the body 14; a first connection part 250 which connects the yoke part 210 with one ends of the support parts 240 in a circumferential direction; and a second connection part 260 which connects the yoke part 210 with the other ends of the support parts 240 in the circumferential direction. Each of the first connection parts 250 and the second connection parts 260 comprises: a first part; and a second part between a connection part with the support part 240 and a connection part with the yoke part 210. An inner end of the second part in a radial direction is directly or indirectly connected with an internal end of the first part in the radial direction. An outer end of the second part in the radial direction is arranged away from the first part in the circumferential direction.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a stator core, a rotating electric machine, a compressor, and a refrigeration device. [Background technology]

[0002] A stator core of a rotating electric machine supported by a casing is known. In one example, the stator core of the rotating electric machine is supported within the body of the casing. Patent Document 1 discloses an example of such a rotating electric machine. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-261162 Summary of the Invention [Problem to be solved by the invention]

[0004] The stator core is fixed to the casing by, for example, shrink fitting. When the stator core is fixed by this method, compressive stress occurs in the yoke portion of the stator core. When compressive stress occurs in the yoke portion, there is a risk of iron loss due to magnetic degradation. [Means for solving the problem]

[0005] A stator core according to a first aspect of the present invention is a stator core for a rotating electric machine that is supported within a cylindrical body of a casing, and includes: a cylindrical yoke portion provided inside the body; a plurality of support portions that are provided outside the yoke portion in a radial direction of the yoke portion and are arranged side by side in a circumferential direction of the yoke portion, supporting the yoke portion on the body; a first connection portion that connects the yoke portion to one end of the support portion in the circumferential direction; and a second connection portion that connects the yoke portion to the other end of the support portion in the circumferential direction, wherein each of the first connection portion and the second connection portion includes a first portion and a second portion that extend radially inward from the support portion between a connection portion with the support portion and a connection portion with the yoke portion, and wherein an inner end of the second portion in the radial direction is directly or indirectly connected to an inner end of the first portion in the radial direction, and an outer end of the second portion in the radial direction is spaced apart from the first portion in the circumferential direction.

[0006] According to this configuration, the outer end of the second portion in the radial direction is positioned away from the first portion in the circumferential direction. That is, there is a gap between the outer ends of the first portion and the second portion in the circumferential direction. This gap allows the second portion to move relative to the first portion. This allows the first connecting portion and the second connecting portion to deform. The deformation of the first connecting portion and the second connecting portion makes it difficult for compressive stress to occur in the yoke portion. This makes it difficult for iron loss due to magnetic degradation to occur.

[0007] A stator core of a second aspect is the stator core of the first aspect, wherein each of the first connection portion and the second connection portion further includes a third portion between a connection portion with the support portion and a connection portion with the yoke portion, and an outer end portion of the third portion in the radial direction is connected directly or indirectly to an outer end portion of the second portion in the radial direction, and an inner end portion of the third portion in the radial direction is positioned away from both the first portion and the second portion in the circumferential direction.

[0008] According to this configuration, the radially inner end of the third portion is positioned away from the second portion in the circumferential direction. That is, there is a gap between the second portion and the inner end of the third portion in the circumferential direction. This gap allows the third portion to move relative to the second portion. This allows each of the first connecting portion and the second connecting portion to deform more appropriately.

[0009] A stator core according to a third aspect is the stator core according to the first or second aspect, wherein the second portion is disposed between adjacent support portions in the circumferential direction.

[0010] According to this configuration, since the second portion is disposed between the adjacent support portions, the portion of the yoke portion located inside the support portions can be enlarged in the radial direction.

[0011] A stator core according to a fourth aspect is the stator core according to any one of the first to third aspects, wherein the second portion is disposed inward of the support portion in the radial direction.

[0012] According to this configuration, since the support portion can be provided also on the radially outer side of the second portion, the yoke portion can be suitably supported on the fuselage.

[0013] A stator core of a fifth aspect is the stator core of the third aspect, wherein the length of the first connection portion in the circumferential direction is not more than half the length of the support portion in the circumferential direction, and the length of the second connection portion in the circumferential direction is not more than half the length of the support portion in the circumferential direction.

[0014] With this configuration, the circumferential length of the support portion can be made equal to or greater than the combined length of the first connecting portion and the second connecting portion, thereby increasing the size of the portion of the yoke portion located in the inner region inside the support portion.

[0015] A stator core of a sixth aspect is the stator core of any one of the first to fifth aspects, wherein a first surface portion facing the second portion is configured at an outer end of the first portion in the radial direction, and a second surface portion facing the first surface portion is configured at an outer end of the second portion in the radial direction, away from the first surface portion in the circumferential direction, and the length from an inner end to an outer end of the first surface portion in the radial direction is longer than the length between the first surface portion and the second surface portion, and the length from the inner end to the outer end of the second surface portion in the radial direction is longer than the length between the first surface portion and the second surface portion.

[0016] According to this configuration, in the gap between the outer ends of the first and second parts in the circumferential direction, the length from the inner end to the outer end is longer than the length between the first and second surface parts, allowing the second part to move preferably relative to the first part.

[0017] A stator core of a seventh aspect is a stator core of any one of the first to sixth aspects, further comprising a plurality of teeth portions extending radially inward from the yoke portion, and each of the first connection portion and the second connection portion is positioned outside the teeth portions in the radial direction.

[0018] In the yoke portion, a magnetic path is less likely to be formed in the radially outer portion of the teeth portion. With this configuration, the first connecting portion and the second connecting portion are provided in the portion of the stator core where a magnetic path is less likely to be formed. Therefore, it is possible to suppress a reduction in the magnetic path due to the provision of the first connecting portion and the second connecting portion.

[0019] The stator core of an eighth aspect is the stator core of the seventh aspect, wherein the first connection portion is arranged on the outside of each of the plurality of tooth portions in the radial direction, and the second connection portion is arranged on the outside of each of the plurality of tooth portions in the radial direction.

[0020] This configuration makes it possible to increase the number of first and second connecting portions while suppressing a reduction in the magnetic path due to the provision of the first and second connecting portions, thereby increasing the number of supporting portions and improving the supporting force of the yoke portion by the supporting portions.

[0021] A stator core of a ninth aspect is a stator core of the seventh or eighth aspect, wherein the length of the first connection portion in the circumferential direction is less than or equal to the length of the tooth portion in the circumferential direction, and the length of the second connection portion in the circumferential direction is less than or equal to the length of the tooth portion in the circumferential direction.

[0022] According to this configuration, the circumferential length of each of the first connecting portion and the second connecting portion is less than or equal to the circumferential length of the tooth portion, so that the first connecting portion or the second connecting portion can be suitably positioned on the outer side of the tooth portion.

[0023] A stator core of a tenth aspect is a stator core of any one of the first to ninth aspects, further comprising a plurality of teeth extending radially inward from the yoke portion, and a plurality of slots surrounded by adjacent teeth in the circumferential direction and a portion of the yoke portion, wherein each of the plurality of support portions is arranged outside each of the plurality of slots in the radial direction, and the number of support portions is the same as the number of slots.

[0024] With this configuration, the support portions are located radially outward of the slots, which makes it possible to suppress compressive stress in the portion of the yoke where the magnetic path is formed, compared to when the number of support portions is smaller than the number of slots.

[0025] According to an eleventh aspect, the stator core of any one of the first to tenth aspects includes three of the support portions arranged in the circumferential direction.

[0026] According to this configuration, the yoke portion can be fixed to the inside of the cylindrical body of the casing by the three support portions.

[0027] A stator core according to a twelfth aspect is the stator core according to any one of the first to eleventh aspects, wherein the support portion is fixed in contact with an inner circumferential surface of the body.

[0028] This configuration allows the stator core to be suitably fixed in the casing by friction.

[0029] A rotating electric machine according to a thirteenth aspect includes the stator core according to any one of the first to twelfth aspects.

[0030] With this configuration, the stator core has a structure that reduces compressive stress from the casing, which reduces iron loss due to magnetic deterioration in the rotating electric machine, thereby increasing the efficiency of the rotating electric machine compared to rotating electric machines with conventional stator cores.

[0031] A compressor according to a fourteenth aspect includes the rotating electric machine according to the thirteenth aspect.

[0032] According to this configuration, the efficiency of the rotating electric machine provided in the compressor is high, and therefore the energy efficiency of the compressor can be increased.

[0033] A refrigeration device according to a fifteenth aspect includes the compressor according to the fourteenth aspect.

[0034] According to this configuration, the refrigeration device is configured with a compressor that has high energy efficiency, so power consumption can be reduced. [Brief explanation of the drawings]

[0035] [Figure 1] 1 is a schematic configuration diagram of a refrigeration device according to an embodiment. [Figure 2] FIG. 1 is a cross-sectional view of a compressor according to an embodiment. [Figure 3] FIG. 2 is a plan view of a stator core according to the embodiment. [Figure 4] 4 is an enlarged schematic view showing the vicinity of a support portion, a first connecting portion, and a second connecting portion of the stator core of FIG. 3. FIG. [Figure 5]4 is an enlarged schematic view showing the vicinity of a first connecting portion and a second connecting portion of the stator core of FIG. 3. FIG. [Figure 6] FIG. 10 is a plan view of a stator core according to a first modified example. [Figure 7] FIG. 10 is a plan view of a stator core according to a second modified example. [Figure 8] 10 is a schematic diagram of a support portion, a first connecting portion, and a second connecting portion of a stator core according to a third modified example. FIG. [Figure 9] 10 is a schematic diagram of a support portion, a first connecting portion, and a second connecting portion of a stator core according to a fourth modified example. FIG. [Figure 10] 10 is a schematic diagram of a support portion, a first connecting portion, and a second connecting portion of a stator core according to a fifth modified example. FIG. [Figure 11] 10 is a schematic diagram of a support portion, a first connecting portion, and a second connecting portion of a stator core according to a sixth modified example. FIG. [Figure 12] FIG. 13 is a schematic diagram of a support portion, a first connecting portion, and a second connecting portion of a stator core according to a seventh modified example. [Figure 13] FIG. 13 is a schematic diagram of a support portion, a first connecting portion, and a second connecting portion of a stator core according to an eighth modified example. [Figure 14] 13 is a schematic diagram of a support portion, a first connecting portion, and a second connecting portion of a stator core according to a ninth modified example. FIG. [Figure 15] FIG. 20 is a schematic diagram of a first connecting portion and a second connecting portion of a stator core according to a tenth modified example. [Figure 16] FIG. 20 is a schematic diagram of a first connecting portion and a second connecting portion of a stator core according to an eleventh modified example. DETAILED DESCRIPTION OF THE INVENTION

[0036] <Embodiment> 1 to 5, a refrigeration device 1, a compressor 10, a rotating electric machine 100, and a stator core 200 according to an embodiment will be described. In the following description, unless otherwise specified, the terms "axial direction," "circumferential direction," and "radial direction" refer to the axial direction, circumferential direction, and radial direction, respectively, relative to the central axis CA of the yoke portion 210.

[0037] <Refrigeration equipment> Referring to Figures 1 and 2, the refrigeration system 1 includes a refrigerant circuit R. The refrigerant circuit R performs a vapor compression refrigeration cycle. The refrigeration system 1 includes a compressor 10. The compressor 10 is provided in the refrigerant circuit R of the refrigeration system 1. In addition to the compressor 10, the refrigerant circuit R is provided with a radiator 23, a pressure reduction mechanism 24 configured with an expansion valve, and an evaporator 25.

[0038] 2 shows an axial cross-sectional view of the compressor 10. In one example, the compressor 10 is a rotary compressor. In one example, the compressor 10 is a swing piston compressor. The compressor 10 may also be a scroll, screw, or turbo compressor.

[0039] The compressor 10 includes a rotating electric machine 100. The rotating electric machine 100 functions as a motor for the compressor 10. The compressor 10 further includes a drive shaft 11, a compression mechanism 12, and a casing 13.

[0040] The casing 13 houses the rotating electric machine 100, the drive shaft 11, and the compression mechanism 12. The casing 13 is a totally sealed container. The inside of the casing 13 is filled with high-pressure refrigerant discharged from the compression mechanism 12. The casing 13 is made of a metal material.

[0041] The casing 13 has a body 14, a bottom 15, and a top 16. The body 14 is a cylindrical member. An opening is formed at each end of the body 14 in the axial direction. In the example of FIG. 2, the axial direction corresponds to the vertical direction. The bottom 15 closes the opening on the lower side of the body 14. The top 16 closes the opening on the upper side of the body 14.

[0042] The drive shaft 11 is provided in the casing 13 along the axial direction. The drive shaft 11 rotates around a central axis CA. One end of the drive shaft 11 is rotatably supported by a bearing 17. The other end of the drive shaft 11 is fixed to a rotor core 400 of the rotating electric machine 100.

[0043] The compression mechanism 12 has a cylinder 18 and a piston 19. The piston 19 is connected to the drive shaft 11 and is provided inside the cylinder 18. A cylinder chamber 20 is formed between the inner periphery of the cylinder 18 and the outer periphery of the piston 19.

[0044] The compressor 10 has a suction pipe 21 and a discharge pipe 22. The suction pipe 21 communicates with a cylinder chamber 20 of the compression mechanism 12. The discharge pipe 22 communicates with the internal space of the casing 13.

[0045] Low-pressure refrigerant from the refrigerant circuit R is drawn into the cylinder chamber 20 of the compression mechanism 12 via a suction pipe 21. The compression mechanism 12 compresses the refrigerant in the cylinder chamber 20 with a piston 19 driven by the drive shaft 11. The inside of the casing 13 is filled with high-pressure refrigerant discharged from the compression mechanism 12. This high-pressure refrigerant flows through the rotating electric machine 100 and is then discharged into the refrigerant circuit R via a discharge pipe 22.

[0046] <Rotating electric machines> Please refer to Fig. 3. In one example, the rotating electric machine 100 is configured as an embedded magnet motor. In one example, the rotating electric machine 100 is an inner rotor motor. The rotating electric machine 100 is disposed within a body 14 of a casing 13. The rotating electric machine 100 includes a stator core 200. Fig. 3 shows a plan view of the stator core 200 as viewed from the axial direction. Fig. 3 shows the casing 13 and the stator core 200 disposed within the body 14.

[0047] The stator core 200 is supported within the cylindrical body 14 of the casing 13. The stator core 200 is fitted into the body 14 of the casing 13. Examples of methods for supporting the stator core 200 within the body 14 include shrink fitting, cold fitting, and press fitting. The stator core 200 is formed by stacking a plurality of stator core plates in the axial direction. In one example, the stator core plates are formed from pressed electromagnetic steel sheets.

[0048] Stator core 200 includes yoke portion 210. Yoke portion 210 is provided inside body 14. Here, "inward" refers to a direction radially toward central axis CA when viewed from the axial direction. Furthermore, "outward," which will be described later, refers to a direction radially away from central axis CA when viewed from the axial direction. Yoke portion 210 is configured in a tubular shape. Yoke portion 210 is configured, for example, in a cylindrical shape. An outer peripheral surface 210S of the cylinder of yoke portion 210 may be provided with irregularities corresponding to the shapes of support portion 240, first connecting portion 250, and second connecting portion 260, which will be described later.

[0049] The stator core 200 further includes a plurality of teeth 220 and a plurality of slots 230. The teeth 220 extend radially inward from the yoke portion 210. Here, the "radially inner" refers to an area closer to the central axis CA than the object when viewed from the axial direction. Furthermore, the "radially outer" described below refers to an area farther from the central axis CA than the object when viewed from the axial direction. The plurality of teeth 220 are aligned in the circumferential direction. In this embodiment, the stator core 200 includes nine teeth 220.

[0050] Each slot 230 is surrounded by circumferentially adjacent teeth 220 and a part of the yoke portion 210. The number of slots 230 is the same as the number of teeth 220.

[0051] 2 and 3, the rotating electric machine 100 further includes a winding 300 and a rotor core 400. The winding 300 is wound around each of the plurality of teeth 220. The rotor core 400 is disposed radially inside the stator core 200. The rotation axis of the rotor core 400 is coaxial with the central axis CA.

[0052] Stator core 200 generates a magnetic field that rotates rotor core 400 around central axis CA when electricity flows through windings 300. In stator core 200, yoke portions 210 and teeth portions 220 form magnetic paths.

[0053] <Configuration of stator core> 3, the stator core 200 includes a yoke portion 210, a plurality of support portions 240, first connection portions 250, and second connection portions 260. One first connection portion 250 and one second connection portion 260 are connected to one support portion 240. The first connection portion 250 and the second connection portion 260 that connects to the same support portion 240 as the first connection portion 250 are configured to be symmetrical with respect to a center line that passes radially through the midpoint of the support portion 240 in the circumferential direction.

[0054] <Support part> The support portion 240 is provided radially outward from the yoke portion 210. The multiple support portions 240 are provided lined up in the circumferential direction. The multiple support portions 240 support the yoke portion 210 to the body 14. The support portions 240 are configured to extend in the circumferential direction. Because the support portions 240 are located between the yoke portion 210 and the body 14, the yoke portion 210 does not contact the body 14. The thickness of the support portions 240 in the radial direction is smaller than that of the yoke portion 210 in the radial direction.

[0055] The support portion 240 is fixed, for example, in contact with the inner circumferential surface 14S of the body 14. The support portion 240 is fixed to the inner circumferential surface 14S of the body 14, whereby the yoke portion 210 is supported by the body 14. In this way, the stator core 200 is supported within the body 14, and the rotating electric machine 100 is supported within the body 14 of the casing 13.

[0056] The stator core 200 of this embodiment includes nine support portions 240. In this embodiment, the number of support portions 240 is the same as the number of slots 230. Each of the multiple support portions 240 is disposed radially outward of each of the multiple slots 230. The region located inward of the support portions 240 is defined as the inner region. At least a portion of the slots 230 is located in the inner region.

[0057] 4. Inner peripheral surface 240S of support portion 240 is spaced apart in the radial direction from outer peripheral surface 210S of yoke portion 210. Distance D1 in the radial direction from inner peripheral surface 240S of support portion 240 to outer peripheral surface 210S of yoke portion 210 is 0.5 mm or more and 1.0 mm or less. When distance D1 is 0.5 mm or more, even if support portion 240 deforms radially inward due to compressive stress, inner peripheral surface 240S of support portion 240 is unlikely to come into contact with outer peripheral surface 210S of yoke portion 210. When distance D1 is 1.0 mm or less, the thickness of yoke portion 210 in the radial direction can be suitably increased.

[0058] <First connection part and second connection part> 4. First connecting portion 250 connects yoke portion 210 to one end 241 of support portion 240 in the circumferential direction. Second connecting portion 260 connects yoke portion 210 to the other end 242 of support portion 240 in the circumferential direction. Yoke portion 210 is connected to support portion 240 by first connecting portion 250 and second connecting portion 260, so that yoke portion 210 is supported within fuselage 14.

[0059] Each of first connecting portion 250 and second connecting portion 260 includes at least one bent portion between the connection portion with support portion 240 and the connection portion with yoke portion 210. The bent portion is composed of two or more portions extending in different directions. When compressive stress is generated in stator core 200 during the manufacture of rotating electric machine 100, for example, and support portion 240 moves relative to yoke portion 210, the periphery of each bent portion of first connecting portion 250 and second connecting portion 260 is deformed, thereby allowing this relative movement.

[0060] The first connecting portion 250 and the second connecting portion 260 are each disposed radially outward of the tooth portion 220. In this embodiment, the number of first connecting portions 250 is the same as the number of tooth portions 220. The number of second connecting portions 260 is the same as the number of tooth portions 220. The first connecting portion 250 is disposed radially outward of each of the plurality of tooth portions 220. The second connecting portion 260 is disposed radially outward of each of the plurality of tooth portions 220. In one example, a portion of the first connecting portion 250 and a portion of the second connecting portion 260 are disposed radially outward of the tooth portion 220.

[0061] 5. Each of the first connecting portion 250 and the second connecting portion 260 includes a first portion 270 and a second portion 280 between the connection portion with the support portion 240 and the connection portion with the yoke portion 210. The first portion 270 and the second portion 280 form a single bent portion. Each of the first connecting portion 250 and the second connecting portion 260 further includes a third portion 290 between the connection portion with the support portion 240 and the connection portion with the yoke portion 210. The second portion 280 and the third portion 290 form a single bent portion. Therefore, in this embodiment, each of the first connecting portion 250 and the second connecting portion 260 has two bent portions. The first portion 270, the second portion 280, and the third portion 290 are arranged in this order between the connection portion with the support portion 240 and the connection portion with the yoke portion 210.

[0062] The first portion 270 is connected to the support portion 240. The first portion 270 is disposed between the body 14 of the casing 13 and the yoke portion 210. The first portion 270 is disposed away from the body 14 of the casing 13. The first portion 270 is disposed away from the yoke portion 210.

[0063] The first portion 270 extends radially inward from the support portion 240. In the first connecting portion 250, an outer end portion 271 of the first portion 270 in the radial direction may include the end portion 241 of the support portion 240. In the second connecting portion 260, the outer end portion 271 of the first portion 270 in the radial direction may include the end portion 242 of the support portion 240. The outer end portion 271 of the first portion 270 in the radial direction is connected to the support portion 240 in the circumferential direction. The inner end portion 272 of the first portion 270 in the radial direction is disposed away from the support portion 240 in the circumferential direction. The support portion 240 and the first portion 270 may form a single bent portion.

[0064] The first portion 270 is disposed between adjacent support portions 240 in the circumferential direction. As long as the first portion 270 is disposed between adjacent support portions 240 in the circumferential direction, the first portion 270 may be disposed radially inward of the support portions 240. An outer end portion 271 of the first portion 270 in the radial direction is disposed away from the body 14 of the casing 13. An inner end portion 272 of the first portion 270 in the radial direction is disposed away from the yoke portion 210.

[0065] A first surface portion 273 is formed at an outer end portion 271 of the first portion 270 in the radial direction. The first surface portion 273 faces the second portion 280.

[0066] The second portion 280 is connected to the first portion 270. The second portion 280 is disposed between the body 14 of the casing 13 and the yoke portion 210. The second portion 280 is disposed away from the body 14 of the casing 13. The second portion 280 is disposed away from the yoke portion 210.

[0067] An inner end 282 of the second portion 280 in the radial direction is directly or indirectly connected to an inner end 272 of the first portion 270 in the radial direction. An outer end 281 of the second portion 280 in the radial direction is disposed away from the first portion 270 in the circumferential direction. In the present embodiment, the inner end 282 of the second portion 280 in the radial direction is indirectly connected to the inner end 272 of the first portion 270 in the radial direction via a portion extending in the circumferential direction.

[0068] The second portion 280 is disposed between adjacent support portions 240 in the circumferential direction. As long as the second portion 280 is positioned between adjacent support portions 240 in the circumferential direction, the second portion 280 may be positioned more inward than the support portions 240 in the radial direction. An outer end portion 281 of the second portion 280 in the radial direction is disposed away from the body 14 of the casing 13. An inner end portion 282 of the second portion 280 in the radial direction is disposed away from the yoke portion 210.

[0069] A second surface portion 283 is formed at an outer end portion 281 of the second portion 280 in the radial direction. The second surface portion 283 is spaced apart from the first surface portion 273 in the circumferential direction and faces the first surface portion 273. A gap is formed between the first surface portion 273 and the second surface portion 283. A length LB1 between the first surface portion 273 and the second surface portion 283 is, for example, not less than 0.5 mm and not more than 1.0 mm.

[0070] The length LS1 from the inner end to the outer end of the first surface portion 273 in the radial direction is longer than the length LB1 between the first surface portion 273 and the second surface portion 283. The length LS2 from the inner end to the outer end of the second surface portion 283 in the radial direction is longer than the length LB1 between the first surface portion 273 and the second surface portion 283. The inner end of the second surface portion 283 is connected to the inner end of the first surface portion 273. The bent portion formed by the first portion 270 and the second portion 280 is likely to deform from the connection portion between the first surface portion 273 and the second surface portion 283 as the starting point.

[0071] A third surface portion 284 is formed at an inner end portion 282 of the second portion 280 in the radial direction. The third surface portion 284 forms the surface of the second portion 280 on the opposite side in the circumferential direction from the second surface portion 283. The third surface portion 284 faces the third portion 290.

[0072] The third portion 290 is connected to the second portion 280. The third portion 290 is disposed between the body 14 of the casing 13 and the yoke portion 210. The third portion 290 is disposed away from the body 14 of the casing 13. The third portion 290 is connected to the outer peripheral surface 210S of the yoke portion 210.

[0073] An outer end 291 of the third portion 290 in the radial direction is directly or indirectly connected to an outer end 281 of the second portion 280 in the radial direction. In this embodiment, the outer end 291 of the third portion 290 in the radial direction is indirectly connected to the outer end 281 of the second portion 280 in the radial direction via a portion extending in the circumferential direction. An inner end 292 of the third portion 290 in the radial direction is connected to the outer peripheral surface 210S of the yoke portion 210 in the radial direction. The inner end 292 of the third portion 290 in the radial direction is disposed away from both the first portion 270 and the second portion 280 in the circumferential direction.

[0074] The third portion 290 is disposed between adjacent support portions 240 in the circumferential direction. As long as the third portion 290 is positioned between adjacent support portions 240 in the circumferential direction, the third portion 290 may be positioned radially inward of the support portions 240. An outer end portion 291 of the third portion 290 in the radial direction is disposed away from the body 14 of the casing 13 in the radial direction.

[0075] A fourth surface portion 293 is formed at an inner end portion 292 of the third portion 290 in the radial direction. The fourth surface portion 293 is spaced apart from the third surface portion 284 in the circumferential direction and faces the third surface portion 284. A gap is formed between the third surface portion 284 and the fourth surface portion 293. A length LB2 between the third surface portion 284 and the fourth surface portion 293 is, for example, not less than 0.5 mm and not more than 1.0 mm.

[0076] The length LS3 from the inner end to the outer end of the third surface portion 284 in the radial direction is longer than the length LB2 between the third surface portion 284 and the fourth surface portion 293. The length LS4 from the inner end to the outer end of the fourth surface portion 293 in the radial direction is longer than the length LB2 between the third surface portion 284 and the fourth surface portion 293. The outer end of the fourth surface portion 293 is connected to the outer end of the third surface portion 284. The bent portion formed by the second portion 280 and the third portion 290 is prone to deformation, starting from the connection portion between the third surface portion 284 and the fourth surface portion 293.

[0077] 4. The length L2 of the second connecting portion 260 in the circumferential direction is equal to, for example, the length L1 of the first connecting portion 250 in the circumferential direction. The length L1 of the first connecting portion 250 corresponds to, for example, the length from the first portion 270 to the third portion 290 in the circumferential direction. Similarly, the length L2 of the second connecting portion 260 corresponds to, for example, the length from the first portion 270 to the third portion 290 in the circumferential direction.

[0078] The length L1 of the first connecting portion 250 in the circumferential direction is equal to or less than the length LT of the tooth portion 220 in the circumferential direction. The length L2 of the second connecting portion 260 in the circumferential direction is equal to or less than the length LT of the tooth portion 220 in the circumferential direction. The combined length of the length L1 of the first connecting portion 250 and the length L2 of the second connecting portion 260 is equal to or greater than the length LT of the tooth portion 220 in the circumferential direction.

[0079] The length L1 of the first connecting portion 250 in the circumferential direction is equal to or less than half the length LS of the support portion 240 in the circumferential direction. The length L2 of the second connecting portion 260 in the circumferential direction is equal to or less than half the length LS of the support portion 240 in the circumferential direction. Furthermore, the combined length of the length L1 of the first connecting portion 250 and the length L2 of the second connecting portion 260 is equal to or less than the length LS of the support portion 240.

[0080] 5. The inner surface of first connecting portion 250 is spaced apart in the radial direction from outer peripheral surface 210S of yoke portion 210. The inner surface of second connecting portion 260 is spaced apart in the radial direction from outer peripheral surface 210S of yoke portion 210. The inner surfaces of first connecting portion 250 and second connecting portion 260 correspond to the inner end surface of inner end 272 of first portion 270 and the inner end surface of inner end 282 of second portion 280, respectively. A distance D2 in the radial direction from the inner surface of first connecting portion 250 to outer peripheral surface 210S of yoke portion 210 is, for example, 0.5 mm or more and 1.0 mm or less. A distance D3 in the radial direction from the inner surface of second connecting portion 260 to outer peripheral surface 210S of yoke portion 210 is, for example, 0.5 mm or more and 1.0 mm or less.

[0081] The gaps formed between the inner surfaces of first connecting portion 250 and second connecting portion 260 and outer peripheral surface 210S of yoke portion 210 are continuous with the gap formed between inner peripheral surface 240S of support portion 240 and outer peripheral surface 210S of yoke portion 210. Support portion 240 is connected to yoke portion 210 only via first connecting portion 250 and second connecting portion 260.

[0082] <Operation of this embodiment> The first function of this embodiment will be described. The support portion 240 is fixed to the body 14 of the casing 13. When the stator core 200 is fixed to the casing 13 by a method such as shrink fitting, compressive stress is generated in the stator core 200. If compressive stress occurs in the yoke portion 210 of the stator core 200, iron loss occurs due to magnetic degradation, which may result in a deterioration in motor characteristics. In the stator core 200 of this embodiment, since the support portion 240 is fixed to the casing 13, this compressive stress is generated mainly in the support portion 240. Because the yoke portion 210 is connected to the support portion 240 via the first connecting portion 250 and the second connecting portion 260, the generation of compressive stress in the yoke portion 210 is suppressed by deformation of the first connecting portion 250 and the second connecting portion 260. Due to deformation of the first connecting portion 250 and the second connecting portion 260, the compressive stress generated in the yoke portion 210 is, for example, half or less of the compressive stress generated in the support portion 240.

[0083] As an example, when the stator core 200 is fitted into the body 14 of the casing 13, the support portion 240 moves radially inward. When the support portion 240 moves radially inward, the first connecting portion 250 and the second connecting portion 260 are deformed such that the first portion 270 moves radially inward and the second portion 280 moves circumferentially. The movement of the second portion 280 in the circumferential direction indicates, for example, a movement in which the outer end portion 281 of the second portion 280 moves toward the first portion 270 and the inner end portion 282 of the second portion 280 moves toward the third portion 290. The movement of the second portion 280 in the circumferential direction may also be a movement in which the outer end portion 281 of the second portion 280 moves toward the third portion 290 and the inner end portion 282 of the second portion 280 moves toward the first portion 270. The movement of first portion 270 in the radial direction may be a movement accompanied by a deformation such that first portion 270 is bent so that outer end 271 and inner end 272 approach each other. The movement of second portion 280 in the circumferential direction may be a movement accompanied by a deformation such that second portion 280 is bent so that outer end 281 and inner end 282 approach each other. The deformation of first connecting portion 250 and second connecting portion 260 as described above reduces compressive stress in the portion of yoke portion 210 where a magnetic path is formed.

[0084] A second function of this embodiment will be described. First connecting portion 250 and second connecting portion 260 can function as a structure that suppresses the propagation of vibration between yoke portion 210 and casing 13. An example of the vibration between yoke portion 210 and casing 13 is vibration of yoke portion 210 caused by rotation of rotor core 400 when rotating electric machine 100 is in operation. By suppressing vibration caused by rotation of rotor core 400, it is possible to improve the vibration-proofing performance of compressor 10 including rotating electric machine 100.

[0085] A third function of this embodiment will be described. First connecting portion 250 and second connecting portion 260 are arranged to be aligned in the circumferential direction with support portion 240. The thickness of yoke portion 210 in the radial direction can be increased compared to when first connecting portion 250 and second connecting portion 260 are arranged in an inner region of support portion 240. This allows the area in yoke portion 210 where a magnetic path is formed to be larger, thereby suppressing an increase in iron loss due to magnetic saturation.

[0086] <Effects of this embodiment> The effects of this embodiment will be described. (1) Stator core 200 includes yoke portion 210, a plurality of support portions 240, a first connection portion 250, and a second connection portion 260. Support portion 240 is provided outward from yoke portion 210 in the radial direction of yoke portion 210. The plurality of support portions 240 are provided side by side in the circumferential direction of yoke portion 210. The plurality of support portions 240 support yoke portion 210 on body 14. First connection portion 250 connects yoke portion 210 to one end 241 of support portion 240 in the circumferential direction. Second connection portion 260 connects yoke portion 210 to the other end 242 of support portion 240 in the circumferential direction. Each of first connection portion 250 and second connection portion 260 includes a first portion 270 and a second portion 280 between the connection portion with support portion 240 and the connection portion with yoke portion 210. The first portion 270 extends radially inward from the support portion 240. An inner end 282 of the second portion 280 in the radial direction is directly or indirectly connected to the inner end 272 of the first portion 270 in the radial direction. An outer end 281 of the second portion 280 in the radial direction is disposed away from the first portion 270 in the circumferential direction.

[0087] According to this configuration, the outer end 281 of the second portion 280 in the radial direction is disposed away from the first portion 270 in the circumferential direction. That is, a gap exists between the first portion 270 and the outer end 281 of the second portion 280 in the circumferential direction. This gap allows the second portion 280 to move relative to the first portion 270. This allows the first connecting portion 250 and the second connecting portion 260 to deform. The deformation of the first connecting portion 250 and the second connecting portion 260 makes it difficult for compressive stress to occur in the yoke portion 210. This makes it difficult for iron loss due to magnetic degradation to occur.

[0088] (2) Each of the first connecting portion 250 and the second connecting portion 260 further includes a third portion 290 between the connecting portion with the support portion 240 and the connecting portion with the yoke portion 210. An outer end portion 291 of the third portion 290 in the radial direction is connected directly or indirectly to an outer end portion 281 of the second portion 280 in the radial direction. An inner end portion 292 of the third portion 290 in the radial direction is disposed away from both the first portion 270 and the second portion 280 in the circumferential direction.

[0089] According to this configuration, the inner end 292 of the third portion 290 in the radial direction is disposed away from the second portion 280 in the circumferential direction. That is, a gap is present between the second portion 280 and the inner end 292 of the third portion 290 in the circumferential direction. This gap allows the third portion 290 to move relative to the second portion 280. This allows each of the first connecting portion 250 and the second connecting portion 260 to deform more suitably.

[0090] (3) The second portion 280 is disposed between the adjacent support portions 240 in the circumferential direction.

[0091] According to this configuration, since second portion 280 is disposed between adjacent support portions 240, the portion of yoke portion 210 located inside support portions 240 can be made larger in the radial direction.

[0092] (4) The length L1 of the first connecting portion 250 in the circumferential direction is equal to or less than half the length LS of the support portion 240 in the circumferential direction. The length L2 of the second connecting portion 260 in the circumferential direction is equal to or less than half the length LS of the support portion 240 in the circumferential direction.

[0093] According to this configuration, the circumferential length LS of support portion 240 can be made equal to or greater than the combined length of circumferential length L1 of first connecting portion 250 and circumferential length L2 of second connecting portion 260. This allows the portion of yoke portion 210 located in the inner region inside support portion 240 to be enlarged.

[0094] (5) A first surface portion 273 is formed at the outer end 271 of the first portion 270 in the radial direction. The first surface portion 273 faces the second portion 280. A second surface portion 283 is formed at the outer end 281 of the second portion 280 in the radial direction. The second surface portion 283 is separated from the first surface portion 273 in the circumferential direction and faces the first surface portion 273. A length LS1 from the inner end to the outer end of the first surface portion 273 in the radial direction is longer than a length LB1 between the first surface portion 273 and the second surface portion 283. A length LS2 from the inner end to the outer end of the second surface portion 283 in the radial direction is longer than a length LB2 between the first surface portion 273 and the second surface portion 283.

[0095] According to this configuration, in the gap between the first portion 270 and the outer end portion 281 of the second portion 280 in the circumferential direction, the length from the inner end to the outer end is longer than the length LB2 between the first surface portion 273 and the second surface portion 283. Therefore, the second portion 280 can move preferably relative to the first portion 270.

[0096] (6) The stator core 200 further includes a plurality of teeth 220 extending radially inward from the yoke portion 210. The first connecting portion 250 and the second connecting portion 260 are each disposed radially outward from the teeth 220.

[0097] In yoke portion 210, a magnetic path is unlikely to be formed in the radially outer portion of tooth portion 220. According to this configuration, first connecting portion 250 and second connecting portion 260 are provided in portions of stator core 200 where a magnetic path is unlikely to be formed. Therefore, it is possible to suppress a reduction in the magnetic path due to the provision of first connecting portion 250 and second connecting portion 260.

[0098] (7) The first connecting portion 250 is disposed radially outward of each of the plurality of teeth 220. The second connecting portion 260 is disposed radially outward of each of the plurality of teeth 220.

[0099] This configuration makes it possible to increase the number of first connecting portions 250 and second connecting portions 260 while suppressing a reduction in the magnetic path caused by providing first connecting portion 250 and second connecting portion 260. This allows the number of supporting portions 240 to be increased, thereby improving the supporting force of supporting portion 240 for yoke portion 210.

[0100] (8) The length L1 of the first connection portion 250 in the circumferential direction is equal to or shorter than the length LT of the teeth portion 220 in the circumferential direction. The length L2 of the second connection portion 260 in the circumferential direction is equal to or shorter than the length LT of the teeth portion 220 in the circumferential direction.

[0101] According to this configuration, the circumferential length of each of the first connecting portion 250 and the second connecting portion 260 is less than or equal to the circumferential length LT of the tooth portion 220, so that the first connecting portion 250 or the second connecting portion 260 can be suitably positioned in the outer portion of the tooth portion 220.

[0102] (9) The stator core 200 further includes a plurality of teeth 220 and a plurality of slots 230. The teeth 220 extend radially inward from the yoke portion 210. The slots 230 are surrounded by adjacent teeth 220 in the circumferential direction and a portion of the yoke portion 210. The plurality of support portions 240 are disposed radially outward of the plurality of slots 230, respectively. The number of support portions 240 is the same as the number of slots 230.

[0103] According to this configuration, support portions 240 are located radially outward of slots 230. This makes it possible to suppress compressive stress in the portion of yoke portion 210 where a magnetic path is formed, compared to when the number of support portions 240 is smaller than the number of slots 230.

[0104] (10) The support portion 240 is fixed in contact with the inner circumferential surface 14S of the body 14.

[0105] This configuration allows the stator core 200 to be suitably fixed in the casing 13 by friction.

[0106] (11) The rotating electric machine 100 includes a stator core 200 .

[0107] According to this configuration, the stator core 200 has a structure that reduces compressive stress from the casing 13, so iron loss due to magnetic deterioration is small in the rotating electric machine 100. Therefore, the efficiency of the rotating electric machine 100 can be increased compared to rotating electric machines having conventional stator cores.

[0108] (12) The compressor 10 includes a rotating electrical machine 100 .

[0109] According to this configuration, the efficiency of the rotating electrical machine 100 included in the compressor 10 is high, and therefore the energy efficiency of the compressor 10 can be increased.

[0110] (13) The refrigeration device 1 includes a compressor 10.

[0111] According to this configuration, the refrigeration device 1 is configured with a compressor 10 that has high energy efficiency, so that power consumption can be reduced.

[0112] <Modification> In addition to the above-described embodiments, the refrigeration device 1, compressor 10, rotating electric machine 100, and stator core 200 of the present disclosure may also be configured in a form that combines, for example, the modified examples shown below, or at least two modified examples that are not mutually contradictory.

[0113] <Support part configuration> Please refer to Figures 6 and 7. The number and length of the support parts 240 can be variously configured other than the example shown in the embodiment. For example, the stator core 200 may include three support portions 240 arranged in the circumferential direction. According to the configuration of this modification, the three support portions 240 can fix the yoke portion 210 inside the cylindrical body 14 of the casing 13.

[0114] 6, one slot 230 is disposed radially inside each of three support portions 240. Because slots 230 can be secured with no support portions 240 positioned radially outside, the thickness of the portion of yoke portion 210 surrounding this slot 230 can be increased.

[0115] The example of Fig. 7 differs from the example of Fig. 6 in the length of the support portions 240 in the circumferential direction. In the example of Fig. 7, two slots 230 are arranged inside each of the three support portions 240 in the radial direction.

[0116] Furthermore, the thickness of the support portion 240 in the radial direction does not have to be constant. The thickness of the support portion 240 in the radial direction may vary depending on the position in the circumferential direction. The greater the thickness of the support portion 240 in the radial direction, the more the strength of the support portion 240 can be improved.

[0117] In this modification, the entire first connection portion 250 can be disposed radially outside one of the teeth 220. Also, the entire second connection portion 260 can be disposed radially outside one of the teeth 220. Therefore, the portion of the yoke portion 210 located in the inner region of the support portion 240 can be suitably secured.

[0118] <Configuration of the first connection part and the second connection part> Please refer to Figures 8 to 16. The shapes of the first connecting portion 250 and the second connecting portion 260 can have various configurations other than the examples shown in the embodiment.

[0119] 8, the inner end 272 of the first portion 270, the inner end 282 of the second portion 280, and the inner end 292 of the third portion 290 are located radially inward of the inner circumferential surface 240S of the support portion 240. The yoke portion 210 is formed to overlap the inner end 272 of the first portion 270, the inner end 282 of the second portion 280, and the inner end 292 of the third portion 290 in the circumferential direction.

[0120] 9, the first portion 270 is configured to bend in the circumferential direction as it approaches the radially inner end 272. The second portion 280 is also configured to bend in the circumferential direction as it approaches the radially inner end 282. The inner end 272 of the first portion 270 and the inner end 282 of the second portion 280 may be directly connected.

[0121] In the example of FIG. 10, an inner end 272 of a first portion 270 and an inner end 282 of a second portion 280, which are configured as straight lines, are directly connected to each other.

[0122] 11 to 13, each of first connecting portion 250 and second connecting portion 260 includes, in addition to first portion 270 to third portion 290, fourth portion 510 and fifth portion 520 between the connection portion with support portion 240 and the connection portion with yoke portion 210. Third portion 290 and fourth portion 510 form a single bent portion. Furthermore, fourth portion 510 and fifth portion 520 form a single bent portion.

[0123] In the example of Fig. 11, a fourth part 510 and a fifth part 520 are added to the example of Fig. 8. In the example of Fig. 12, a fourth part 510 and a fifth part 520 are added to the example of Fig. 9. In the example of Fig. 13, a fourth part 510 and a fifth part 520 are added to the example of Fig. 10.

[0124] 14, the second portion 280 is disposed radially inward of the support portion 240. With this configuration, the support portion 240 can also be provided radially outward of the second portion 280, thereby suitably supporting the yoke portion 210 on the body 14. Furthermore, the third portion 290 is also disposed radially inward of the support portion 240.

[0125] 15, when viewed from the axial direction, a first recess 531 is provided in the first surface portion 273. When viewed from the axial direction, a second recess 532 is provided in the second surface portion 283. The first recess 531 and the second recess 532 form openings 533 in each of the first connecting portion 250 and the second connecting portion 260. These openings allow each of the first connecting portion 250 and the second connecting portion 260 to deform appropriately.

[0126] 16 , a gap 541 may be provided in each of the first connecting portion 250 and the second connecting portion 260. The gap 541 axially passes through each of the first connecting portion 250 and the second connecting portion 260. The shape of the gap 541 can be set appropriately depending on the shapes of the first connecting portion 250 and the second connecting portion 260.

[0127] <Other variations> The third portion 290 may be omitted from each of the first connecting portion 250 and the second connecting portion 260. In this modification, the portion corresponding to the third surface portion 284 may be directly connected to the yoke portion 210.

[0128] The length L1 of first connecting portion 250 in the circumferential direction may be greater than half the length LS of support portion 240 in the circumferential direction. The length L2 of second connecting portion 260 in the circumferential direction may be greater than half the length LS of support portion 240 in the circumferential direction. In this modification, the first connecting portion 250 and second connecting portion 260 can be made larger, which more preferably allows for relative movement of support portion 240 with respect to yoke portion 210.

[0129] The circumferential length L1 of the first connection portion 250 may be greater than the circumferential length LT of the tooth portion 220. The circumferential length L2 of the second connection portion 260 may be greater than the circumferential length LT of the tooth portion 220.

[0130] As long as the bent portion formed by the first portion 270 and the second portion 280 can be deformed, the length LS1 from the inner end to the outer end of the first surface portion 273 in the radial direction may be equal to or less than the length LB1 between the first surface portion 273 and the second surface portion 283. Similarly, the length LS2 from the inner end to the outer end of the second surface portion 283 in the radial direction may be equal to or less than the length LB1 between the first surface portion 273 and the second surface portion 283.

[0131] Each of the first connecting portion 250 and the second connecting portion 260 may be disposed radially away from the outer side of the teeth portion 220. In other words, each of the first connecting portion 250 and the second connecting portion 260 does not have to overlap with the teeth portion 220 in the radial direction.

[0132] In the embodiment, the rotating electric machine 100 has been described as the motor of the compressor 10, but the rotating electric machine 100 may be applied to a generator of a power generation device. Alternatively, the rotating electric machine 100 may be applied to a motor generator having both the functions of a motor and a generator.

[0133] While the embodiments of the refrigeration device 1, compressor 10, rotating electric machine 100, and stator core 200 have been described above, it will be understood that various modifications of form and details are possible without departing from the spirit and scope of the refrigeration device 1, compressor 10, rotating electric machine 100, and stator core 200 as set forth in the claims. [Explanation of symbols]

[0134] 1...refrigeration device, 10...compressor, 13...casing, 14...body, 100...rotating electric machine, 200...stator core, 210...yoke portion, 220...teeth portion, 230...slot, 240...support portion, 250...first connecting portion, 260...second connecting portion, 270...first part, 273...first surface portion, 280...second part, 283...second surface portion, 290...third part.

Claims

1. A stator core (200) of a rotating electric machine (100) supported in a cylindrical body (14) of a casing (13), a cylindrical yoke portion (210) provided inside the body (14); a plurality of support portions (240) that are provided outward from the yoke portion (210) in the radial direction of the yoke portion (210) and are arranged side by side in the circumferential direction of the yoke portion (210), and that support the yoke portion (210) on the fuselage (14); a first connection portion (250) that connects the yoke portion (210) and one end (241) of the support portion (240) in the circumferential direction; a second connection portion (260) that connects the yoke portion (210) and the other end portion (242) of the support portion (240) in the circumferential direction, Each of the first connecting portion (250) and the second connecting portion (260) has a portion between the connecting portion with the support portion (240) and the connecting portion with the yoke portion (210), a first portion (270) extending radially inward from the support portion (240); a second portion (280); an inner end (282) of the second portion (280) in the radial direction is directly or indirectly connected to an inner end (272) of the first portion (270) in the radial direction; an outer end (281) of the second portion (280) in the radial direction is spaced apart from the first portion (270) in the circumferential direction; Stator core.

2. Each of the first connecting portion (250) and the second connecting portion (260) further includes a third portion (290) between a connecting portion with the support portion (240) and a connecting portion with the yoke portion (210), an outer end (291) of the third portion (290) in the radial direction is directly or indirectly connected to an outer end (281) of the second portion (280) in the radial direction; an inner end (292) of the third portion (290) in the radial direction is spaced apart from both the first portion (270) and the second portion (280) in the circumferential direction; The stator core according to claim 1 .

3. The second portion (280) is disposed between adjacent support portions (240) in the circumferential direction. The stator core according to claim 1 .

4. The second portion (280) is disposed inward of the support portion (240) in the radial direction. The stator core according to claim 1 .

5. The length (L1) of the first connection portion (250) in the circumferential direction is equal to or less than half the length (LS) of the support portion (240) in the circumferential direction, The length (L2) of the second connection portion (260) in the circumferential direction is equal to or less than half the length (LS) of the support portion (240) in the circumferential direction. The stator core according to claim 3 .

6. A first surface portion (273) facing the second portion (280) is configured at an outer end portion (271) of the first portion (270) in the radial direction, A second surface portion (283) is configured at an outer end portion (281) of the second portion (280) in the radial direction, the second surface portion (283) being spaced apart from the first surface portion (273) in the circumferential direction and facing the first surface portion (273), A length (LS1) from an inner end to an outer end of the first surface portion (273) in the radial direction is longer than a length (LB1) between the first surface portion (273) and the second surface portion (283), A length (LS2) from the inner end to the outer end of the second surface portion (283) in the radial direction is longer than a length (LB1) between the first surface portion (273) and the second surface portion (283). The stator core according to claim 1 .

7. The rotor further includes a plurality of teeth (220) extending radially inward from the yoke (210), Each of the first connection portion (250) and the second connection portion (260) is disposed outside the tooth portion (220) in the radial direction. The stator core according to claim 1 .

8. The first connection portion (250) is arranged on the outer side of each of the plurality of tooth portions (220) in the radial direction, The second connection portion (260) is arranged on the outer side of each of the plurality of tooth portions (220) in the radial direction. The stator core according to claim 7 .

9. a length (L1) of the first connection portion (250) in the circumferential direction is equal to or less than a length (LT) of the teeth portion (220) in the circumferential direction; The length (L2) of the second connection portion (260) in the circumferential direction is equal to or less than the length (LT) of the teeth portion (220) in the circumferential direction. The stator core according to claim 7 .

10. a plurality of teeth (220) extending radially inward from the yoke (210); a plurality of slots (230) surrounded by the teeth portions (220) adjacent to each other in the circumferential direction and a part of the yoke portion (210), Each of the plurality of support portions (240) is disposed outside each of the plurality of slots (230) in the radial direction, The number of the supports (240) is the same as the number of the slots (230). The stator core according to claim 1 .

11. The support portion (240) includes three support portions (240) arranged in the circumferential direction. The stator core according to claim 1 .

12. The support portion (240) is fixed in contact with the inner peripheral surface (14S) of the body (14). The stator core according to claim 1 .

13. Comprising a stator core (200) according to any one of claims 1 to 12, Rotating electric motor.

14. The rotating electric machine (100) according to claim 13, Compressor.

15. The compressor (10) according to claim 14, Refrigeration equipment.

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