Electric motors and compressors

Abstract

The stator (22) of the electric motor (5) includes: an outer peripheral wall portion (35) having multiple slits (48), multiple windings (24), and multiple jumpers (42). The first jumper (42-U1) of the two jumpers (42-U1~42-U2) of each phase (U) connects two windings (24-U1, 24-U2) of the four windings (24-U1~24-U4) of that phase (U), and is disposed in the outer peripheral wall portion as a part of the first jumper (42-U1). The second cross wire (42-U2) passes through two of the four gaps (48-U1 to 48-U4) of the phase (U) in a manner that is located on the outer periphery side of the phase (U). The second cross wire (42-U2) connects the two windings (24-U3 and 24-U4) and passes through the two gaps (48-U3 and 48-U4) in a manner that is located on the outer periphery side of the outer periphery wall (35). The two gaps of the four gaps of each phase have the same depth.

Description

Technical Field

[0001] The technology disclosed herein relates to electric motors and compressors. Background Technology

[0002] A compressor is known, which houses an electric motor and a compression section inside a container to compress refrigerant using the rotational power generated by the electric motor. The electric motor has an annular stator (stator core) disposed on the outer periphery of the rotor. The stator includes: a plurality of teeth protruding from the inner periphery of the annular yoke of the stator core toward the rotor; a plurality of windings (coils) formed by winding wires on each of the plurality of teeth; and a cylindrical insulating frame disposed at one end of the stator core along its axial direction. The stator has twelve teeth (twelve windings), and in the case of an eight-pole rotor, two windings of the same phase are sometimes connected to each other via jumpers. Each jumper passes through two gaps formed in the cylindrical portion, thereby being disposed on the outer periphery of the cylindrical insulating frame (Patent Document 1).

[0003] Patent Document 1: Japanese Patent Application Publication No. 2001-119885 Summary of the Invention

[0004] However, this type of motor has the following problem: when multiple jumper wires are arranged in the axial direction parallel to the rotation axis, in order to prevent the jumper wires of different phases from making electrical contact with each other, it is necessary to increase the axial height of the cylindrical insulation frame, which results in the motor becoming larger in the axial direction.

[0005] The present invention is made in view of the above-mentioned problems, and its purpose is to provide an electric motor and compressor capable of reducing the axial height of a cylindrical insulating frame.

[0006] An electric motor according to one embodiment of the present disclosure comprises: a rotor; and a stator that generates a magnetic field that causes the rotor to rotate about a rotation axis. The stator has: a stator core having: an annular yoke surrounding the outer periphery of the rotor, and a plurality of teeth, namely first to twelfth teeth, protruding from the inner periphery of the yoke toward the rotor and arranged circumferentially; a cylindrical insulating frame disposed at one end of the stator core parallel to the rotation axis; and a plurality of windings formed by winding wires through the insulating frame around the teeth of the plurality of teeth. The plurality of windings have four U-phase windings, four V-phase windings, and four W-phase windings, and are arranged such that two adjacent windings in the circumferential direction of the stator core are windings of different phases. The stator further has, for each of the three phases, a first bridging wire for bridging the four windings of the same phase. A jumper wire connecting two windings to each other; and a second jumper wire connecting two other windings of the four windings of the same phase to each other. The insulating frame is formed with a plurality of slits, including: a plurality of lead-out side slits for the winding end point connected to the jumper wire, and a plurality of lead-in side slits for the winding start point connected to the jumper wire. Each of the plurality of jumper wires passes through the lead-out side slits and the lead-in side slits formed in the insulating frame, thereby connecting the two windings of the same phase to each other. In each of the three phases, at least two of the four slits of the first jumper wire's lead-out side slit, the first jumper wire's lead-in side slit, the second jumper wire's lead-out side slit, and the second jumper wire's lead-in side slit have the same depth.

[0007] The electric motor and compressor disclosed herein can reduce the axial height of the cylindrical insulating frame. Attached Figure Description

[0008] Figure 1 This is a longitudinal cross-sectional view of a compressor equipped with the electric motor of Embodiment 1.

[0009] Figure 2 This is a top view showing the stator core.

[0010] Figure 3 This is a top view of the electric motor.

[0011] Figure 4 It is a wiring diagram that shows the wiring status of multiple windings.

[0012] Figure 5 This is a diagram showing the development of the stator.

[0013] Figure 6 This is a diagram showing the stator of the electric motor in Comparative Example 1.

[0014] Figure 7 This is a diagram showing the stator of the electric motor in Comparative Example 2.

[0015] Figure 8 This is a development diagram of the stator of the electric motor in Comparative Example 3.

[0016] Figure 9 This is a wiring diagram showing the wiring status of multiple windings of the motor in Embodiment 2.

[0017] Figure 10 This is a development diagram showing the stator of the electric motor in Embodiment 2.

[0018] Figure 11 This is a wiring diagram showing the wiring status of multiple windings of the motor in Embodiment 3.

[0019] Figure 12 This is a development diagram showing the stator of the electric motor in Embodiment 3.

[0020] Figure 13 This is a wiring diagram showing the wiring status of multiple windings of the motor in Embodiment 4.

[0021] Figure 14 This is a development diagram showing the stator of the electric motor in Embodiment 4. Detailed Implementation

[0022] The electric motor and compressor according to the embodiments disclosed in this application will now be described with reference to the accompanying drawings. However, the technology disclosed herein is not limited to the following description. Furthermore, in the following description, the same structural elements are labeled with the same symbols, and repeated descriptions are omitted.

[0023] Example 1 like Figure 1 As shown, in Embodiment 1, the electric motor 5 is installed in the compressor 1. Figure 1 This is a longitudinal sectional view of a compressor 1 equipped with the electric motor 5 of Embodiment 1. The compressor 1 includes: a housing 2, a shaft 3, an electric motor 5, and a compression section 6. An internal space 7 is formed inside the housing 2, which is separated from the outside of the housing 2. The internal space 7 is formed in a generally cylindrical shape. The housing 2 is configured such that when the housing 2 is placed longitudinally on a horizontal mounting surface, the central axis of the cylinder formed by the internal space 7 is parallel to the vertical direction.

[0024] The housing 2 has a U-phase power terminal 8U, a V-phase power terminal 8V, and a W-phase power terminal 8W. The U-phase power terminal 8U is formed of a conductor. It penetrates the upper part of the housing 2, with one end located in the internal space 7 and the other end located outside the housing 2. The V-phase power terminal 8V is formed of a conductor. It penetrates the upper part of the housing 2, with one end located in the internal space 7 and the other end located outside the housing 2. The W-phase power terminal 8W is formed of a conductor. It penetrates the upper part of the housing 2, with one end located in the internal space 7 and the other end located outside the housing 2. The U-phase power terminal 8U, V-phase power terminal 8V, and W-phase power terminal 8W are installed in the housing 2 in such a way that the U-phase power terminal 8U, V-phase power terminal 8V, and W-phase power terminal 8W are not electrically connected to each other, and the U-phase power terminal 8U, V-phase power terminal 8V, and W-phase power terminal 8W are not electrically connected to the housing 2.

[0025] The housing 2 also includes an intake pipe 11 and an exhaust pipe 12. An internal flow path 14 is formed in the intake pipe 11. The intake pipe 11 is installed in the housing 2 such that it is connected to the lower part of the internal space 7 via the flow path 14. An internal flow path 15 is formed in the exhaust pipe 12. The exhaust pipe 12 is installed in the housing 2 such that it is connected to the upper part of the internal space 7 via the flow path 15. The shaft 3 is formed in the shape of a rod. The shaft 3 is disposed in the internal space 7 along a rotation axis 16 and is supported in the housing 2 in a manner that allows it to rotate about the rotation axis 16, which is the central axis of the cylinder formed along the internal space 7.

[0026] The electric motor 5 is located in the upper part of the internal space 7. The electric motor 5 includes a rotor 21 and a stator 22. The rotor 21 is formed into a generally cylindrical shape. The rotor 21 is fixed to the shaft 3 and supported in the housing 2 in a manner that allows it to rotate about the rotation axis 16. The stator 22 is formed into a generally cylindrical shape. The stator 22 is arranged to surround the rotor 21 and is fixed to the housing 2. The stator 22 includes a stator core 23, multiple windings 24, a lower insulating frame 25, and an upper insulating frame 26. The lower insulating frame 25 is located at the lower part of the stator core 23. The upper insulating frame 26 is located at the upper part of the stator core 23.

[0027] The compressor unit 6 is located below the motor 5 in the internal space 7. The compressor unit 6 is a rotary compressor mechanism that compresses the refrigerant supplied through the suction pipe 11 by rotating the shaft 3, and supplies the compressed refrigerant to the space between the motor 5 and the compressor unit 6 in the internal space 7.

[0028] Figure 2This is a top view showing the stator core 23. The stator core 23 is formed by stacking multiple electromagnetic steel plates, which are formed of a soft magnetic material, such as silicon steel plates. The stator core 23 has a yoke 31 and multiple stator core teeth 32-1 to 32-12. The yoke 31 is formed into a generally cylindrical shape and is arranged in the internal space 7 such that the central axis of the yoke 31 overlaps with the rotation axis 16 of the rotor 21. The first stator core tooth 32-1 of the multiple stator core teeth 32-1 to 32-12 is formed into a generally cylindrical shape. The first stator core tooth 32-1 is integrally formed with the yoke 31 such that one end of the first stator core tooth 32-1 is in contact with the inner peripheral surface of the yoke 31, that is, the first stator core tooth 32-1 protrudes from the inner peripheral surface of the yoke 31 toward the rotation axis 16. The other stator core teeth among the plurality of stator core teeth 32-1 to 32-12, which differ from the first stator core tooth 32-1, are also formed in a generally cylindrical shape, protruding from the inner circumferential surface of the yoke 31, just like the first stator core tooth 32-1. The plurality of stator core teeth 32-1 to 32-12 are arranged at equal intervals along the circumferential direction on the inner circumferential surface of the yoke 31, and are configured at 30-degree intervals with respect to the rotation axis 16.

[0029] Figure 3 This is a top view of the electric motor 5. The lower insulating frame 25 is formed of an insulator, for example, polybutylene terephthalate resin (PBT). The lower insulating frame 25 has an outer peripheral wall portion 35 and a plurality of insulating frame teeth 36-1 to 36-12. The outer peripheral wall portion 35 is formed into a generally cylindrical shape. The first insulating frame tooth 36-1 among the plurality of insulating frame teeth 36-1 to 36-12 is formed into a columnar shape. The first insulating frame tooth 36-1 is integrally formed with the outer peripheral wall portion 35 such that one end of the first insulating frame tooth 36-1 is in contact with the inner peripheral surface of the outer peripheral wall portion 35, that is, the first insulating frame tooth 36-1 protrudes from the inner peripheral surface of the outer peripheral wall portion 35 toward the rotating shaft 16. The other insulating frame teeth among the plurality of insulating frame teeth 36-1 to 36-12, which differ from the first insulating frame tooth 36-1, are also formed in a generally columnar shape, and protrude from the inner circumferential surface of the outer peripheral wall portion 35, just like the first insulating frame tooth 36-1. The plurality of insulating frame teeth 36-1 to 36-12 are arranged at equal intervals along the circumferential direction on the inner circumferential surface of the outer peripheral wall portion 35, and are arranged at 30-degree intervals with the central axis of the outer peripheral wall portion 35 as the center.

[0030] The lower insulating frame 25 is arranged below the stator core 23 in such a way that one end of the outer peripheral wall portion 35, parallel to the axial direction of the rotation axis 16, is connected to the lower end of the yoke portion 31 of the stator core 23, and the plurality of insulating frame teeth 36-1 to 36-12 are respectively connected to the lower ends of the plurality of stator core teeth 32-1 to 32-12.

[0031] The upper insulating frame 26 is formed in the same manner as the lower insulating frame 25, and includes an outer peripheral wall portion and multiple insulating frame teeth. The upper insulating frame 26 is positioned above the stator core 23 such that one axial end of the outer peripheral wall portion is connected to the upper end of the yoke portion 31 of the stator core 23, and the multiple insulating frame teeth are respectively connected to the upper ends of multiple stator core teeth 32-1 to 32-12. By forming the upper insulating frame 26 in the same manner as the lower insulating frame 25, the motor 5 eliminates the need to manufacture the upper insulating frame 26 and the lower insulating frame 25 separately. By using the insulating frame manufactured as the lower insulating frame 25 as the upper insulating frame 26, manufacturing costs can be reduced.

[0032] The first stator core tooth 32-1, together with the first insulating frame tooth 36-1 of the lower insulating frame 25 and one of the multiple insulating frame teeth of the upper insulating frame 26, is wound together with one of the multiple windings 24. Other stator core teeth 32-1 to 32-12 that are different from the first stator core tooth 32-1 are also wound together with one of the multiple insulating frame teeth 36-1 to 36-12 of the lower insulating frame 25 and one of the multiple insulating frame teeth of the upper insulating frame 26, and are wound together with one of the multiple windings 24. By having the multiple stator core teeth 32-1 to 32-12, together with the multiple insulating frame teeth 36-1 to 36-12 and the multiple insulating frame teeth of the upper insulating frame 26, wound together with the multiple windings 24 respectively, the stator 22 can prevent the multiple windings 24 from being electrically short-circuited with the stator core 23.

[0033] The rotor 21 comprises a rotor core 38 and eight permanent magnets 39. The rotor core 38 is formed by stacking multiple thin plates made of a magnetic material, such as silicon steel, and is generally cylindrical. The rotor core 38 is fixed to the shaft 3 by inserting it through the center of the rotor core 38. Each of the eight permanent magnets 39 is plate-shaped. The eight permanent magnets 39 are embedded inside the rotor core 38, evenly spaced circumferentially, and fixed to the rotor core 38. Through the eight permanent magnets 39, the rotor 21 is configured as an eight-pole rotor.

[0034] like Figure 4 As shown, the stator 22 includes: a first neutral point 41-1, a second neutral point 41-2, multiple jumper wires 42, multiple neutral lines 43, and multiple power lines 44. Figure 4 This is a wiring diagram showing the connection status of multiple windings 24. The first neutral point 41-1 and the second neutral point 41-2 are electrically insulated. The multiple windings 24 include: four U-phase windings 24-U1~24-U4, four V-phase windings 24-V1~24-V4, and four W-phase windings 24-W1~24-W4. The multiple jumper wires 42 include: two U-phase jumper wires 42-U1~42-U2, two V-phase jumper wires 42-V1~42-V2, and two W-phase jumper wires 42-W1~42-W2.

[0035] The four U-phase windings 24-U1 to 24-U4 include: a first U-phase winding 24-U1, a second U-phase winding 24-U2, a third U-phase winding 24-U3, and a fourth U-phase winding 24-U4. The two U-phase jumpers 42-U1 to 42-U2 include: a first U-phase jumper 42-U1 and a second U-phase jumper 42-U2. One end of the first U-phase winding 24-U1 is connected to one end of the second U-phase winding 24-U2 via the first U-phase jumper 42-U1. That is, the stator 22 has a first U-phase series connection portion 45-U1 where the first U-phase winding 24-U1 and the second U-phase winding 24-U2 are connected in series. One end of the third U-phase winding 24-U3 is connected to one end of the fourth U-phase winding 24-U4 via the second U-phase jumper 42-U2. That is, the stator 22 is provided with a second U-phase series section 45-U2, in which the third U-phase winding 24-U3 and the fourth U-phase winding 24-U4 are connected in series.

[0036] Multiple neutral lines 43 include a first U-phase neutral line 43-U1 and a second U-phase neutral line 43-U2. The other end of the second U-phase winding 24-U2 is connected to the first neutral point 41-1 via the first U-phase neutral line 43-U1. The other end of the fourth U-phase winding 24-U4 is connected to the second neutral point 41-2 via the second U-phase neutral line 43-U2.

[0037] Multiple power lines 44 include a first U-phase power line 44-U1 and a second U-phase power line 44-U2. The other end of the first U-phase winding 24-U1 is connected to the U-phase power terminal 8U via the first U-phase power line 44-U1. The other end of the third U-phase winding 24-U3 is connected to the U-phase power terminal 8U via the second U-phase power line 44-U2. That is, the first U-phase series connection 45-U1 and the second U-phase series connection 45-U2 are connected in parallel.

[0038] The four V-phase windings 24-V1 to 24-V4 include: a first V-phase winding 24-V1, a second V-phase winding 24-V2, a third V-phase winding 24-V3, and a fourth V-phase winding 24-V4. The two V-phase jumpers 42-V1 to 42-V2 also include: a first V-phase jumper 42-V1 and a second V-phase jumper 42-V2. One end of the first V-phase winding 24-V1 is connected to one end of the second V-phase winding 24-V2 via the first V-phase jumper 42-V1. That is, the stator 22 has a first V-phase series connection portion 45-V1 where the first V-phase winding 24-V1 and the second V-phase winding 24-V2 are connected in series. One end of the third V-phase winding 24-V3 is connected to one end of the fourth V-phase winding 24-V4 via the second V-phase jumper 42-V2. That is, the stator 22 is provided with a second V-phase series section 45-V2, in which the third V-phase winding 24-V3 and the fourth V-phase winding 24-V4 are connected in series.

[0039] The multiple neutral lines 43 also include a first V-phase neutral line 43-V1 and a second V-phase neutral line 43-V2. The other end of the second V-phase winding 24-V2 is connected to the first neutral point 41-1 via the first V-phase neutral line 43-V1. The other end of the fourth V-phase winding 24-V4 is connected to the second neutral point 41-2 via the second V-phase neutral line 43-V2.

[0040] The multiple power lines 44 also include a first V-phase power line 44-V1 and a second V-phase power line 44-V2. The other end of the first V-phase winding 24-V1 is connected to the V-phase power terminal 8V via the first V-phase power line 44-V1. The other end of the third V-phase winding 24-V3 is connected to the V-phase power terminal 8V via the second V-phase power line 44-V2. That is, the first V-phase series section 45-V1 and the second V-phase series section 45-V2 are connected in parallel.

[0041] The four W-phase windings 24-W1 to 24-W4 include: a first W-phase winding 24-W1, a second W-phase winding 24-W2, a third W-phase winding 24-W3, and a fourth W-phase winding 24-W4. The two W-phase jumpers 42-W1 to 42-W2 also include: a first W-phase jumper 42-W1 and a second W-phase jumper 42-W2. One end of the first W-phase winding 24-W1 is connected to one end of the second W-phase winding 24-W2 via the first W-phase jumper 42-W1. That is, the stator 22 has a first W-phase series connection section 45-W1 where the first W-phase winding 24-W1 and the second W-phase winding 24-W2 are connected in series. One end of the third W-phase winding 24-W3 is connected to one end of the fourth W-phase winding 24-W4 via the second W-phase jumper 42-W2. That is, the stator 22 is provided with a second W-phase series section 45-W2, in which the third W-phase winding 24-W3 and the fourth W-phase winding 24-W4 are connected in series.

[0042] The multiple neutral lines 43 also include a first W-phase neutral line 43-W1 and a second W-phase neutral line 43-W2. The other end of the second W-phase winding 24-W2 is connected to the first neutral point 41-1 via the first W-phase neutral line 43-W1. The other end of the fourth W-phase winding 24-W4 is connected to the second neutral point 41-2 via the second W-phase neutral line 43-W2.

[0043] The multiple power lines 44 also include a first W-phase power line 44-W1 and a second W-phase power line 44-W2. The other end of the first W-phase winding 24-W1 is connected to the W-phase power terminal 8W via the first W-phase power line 44-W1. The other end of the third W-phase winding 24-W3 is connected to the W-phase power terminal 8W via the second W-phase power line 44-W2. That is, the first W-phase series connection 45-W1 and the second W-phase series connection 45-W2 are connected in parallel.

[0044] For ease of explanation, when any one of the U, V, or W phases is considered the X phase, the four windings of the X phase, arranged circumferentially, are referred to as the first X phase winding, the second X phase winding, the third X phase winding, and the fourth X phase winding. The first U phase winding 24-U1 is wound on the first stator core tooth section 32-1. The second U phase winding 24-U2 is wound on the fourth stator core tooth section 32-4. The third U phase winding 24-U3 is wound on the seventh stator core tooth section 32-7. The fourth U phase winding 24-U4 is wound on the tenth stator core tooth section 32-10. The first V phase winding 24-V1 is wound on the fifth stator core tooth section 32-5. The second V phase winding 24-V2 is wound on the eighth stator core tooth section 32-8. The third V-phase winding 24-V3 is wound on the eleventh stator core tooth section 32-11. The fourth V-phase winding 24-V4 is wound on the second stator core tooth section 32-2. The first W-phase winding 24-W1 is wound on the ninth stator core tooth section 32-9. The second W-phase winding 24-W2 is wound on the twelfth stator core tooth section 32-12. The third W-phase winding 24-W3 is wound on the third stator core tooth section 32-3. The fourth W-phase winding 24-W4 is wound on the sixth stator core tooth section 32-6.

[0045] That is, such as Figure 5 As shown, multiple windings 24 are arranged in a cyclic sequence of U phase, V phase, and W phase in the circumferential direction of the stator core 23. Figure 5 This is an unfolded view of the stator 22. The multiple windings 24 are also arranged such that the multiple windings 24 are connected by adjacent poles. That is, the multiple windings 24 are arranged such that, circumferentially, no windings of the same phase as the two windings connected in series are placed between them. For example, the four U-phase windings 24-U1 to 24-U4 are arranged such that, circumferentially, no windings of the same phase, namely the third U-phase winding 24-U3 and the fourth U-phase winding 24-U4, are placed between the first U-phase winding 24-U1 and the second U-phase winding 24-U2, which constitute the first U-phase series connection 45-U1.

[0046] The outer peripheral wall 35 of the lower insulating frame 25 has a plurality of slots 48. Each slot 48 is formed from one end of the outer peripheral wall 35 away from the stator core 23 toward the stator core 23. The plurality of slots 48 includes four U-phase slots 48-U1 to 48-U4, four V-phase slots 48-V1 to 48-V4, and four W-phase slots 48-W1 to 48-W4.

[0047] The four U-phase slots 48-U1 to 48-U4 include: a first U-phase lead-out side slot 48-U1, a first U-phase lead-in side slot 48-U2, a second U-phase lead-out side slot 48-U3, and a second U-phase lead-in side slot 48-U4. The first U-phase lead-out side slot 48-U1 is formed in the outer peripheral wall portion 35 on the reverse guiding side of the first stator core tooth portion 32-1, relative to the stator core 23, and its depth is equal to a first depth d1. The first U-phase lead-out side slot 48-U2 is formed in the outer peripheral wall portion 35 on the reverse guiding side of the fourth stator core tooth portion 32-4, and its depth is equal to the first depth d1. The second U-phase lead-out side slot 48-U3 is formed on the reverse guide side of the seventh stator core tooth 32-7 in the outer peripheral wall portion 35, and the depth of the second U-phase lead-out side slot 48-U3 is equal to the second depth d2. The second depth d2 is shallower than the first depth d1. The second U-phase lead-in side slot 48-U4 is formed on the reverse guide side of the tenth stator core tooth 32-10 in the outer peripheral wall portion 35, and the depth of the second U-phase lead-in side slot 48-U4 is equal to the second depth d2.

[0048] The four V-phase slots 48-V1 to 48-V4 include: a first V-phase lead-out side slot 48-V1, a first V-phase lead-in side slot 48-V2, a second V-phase lead-out side slot 48-V3, and a second V-phase lead-in side slot 48-V4. The first V-phase lead-out side slot 48-V1 is formed on the reverse guiding side of the fifth stator core tooth 32-5 in the outer peripheral wall portion 35, and its depth is equal to a first depth d1. The first V-phase lead-in side slot 48-V2 is formed on the reverse guiding side of the eighth stator core tooth 32-8 in the outer peripheral wall portion 35, and its depth is equal to the first depth d1. The second V-phase lead-out side gap 48-V3 is formed on the reverse guide side of the eleventh stator core tooth portion 32-11 in the outer peripheral wall portion 35, and the depth of the second V-phase lead-out side gap 48-V3 is equal to the second depth d2. The second V-phase lead-in side gap 48-V4 is formed on the reverse guide side of the second stator core tooth portion 32-2 in the outer peripheral wall portion 35, and the depth of the second V-phase lead-in side gap 48-V4 is equal to the second depth d2.

[0049] The four W-phase slots 48-W1 to 48-W4 include: a first W-phase lead-out side slot 48-W1, a first W-phase lead-in side slot 48-W2, a second W-phase lead-out side slot 48-W3, and a second W-phase lead-in side slot 48-W4. The first W-phase lead-out side slot 48-W1 is formed on the reverse guiding side of the ninth stator core tooth 32-9 in the outer peripheral wall portion 35, and its depth is equal to a first depth d1. The first W-phase lead-in side slot 48-W2 is formed on the reverse guiding side of the twelfth stator core tooth 32-12 in the outer peripheral wall portion 35, and its depth is equal to the first depth d1. The second W-phase lead-out side gap 48-W3 is formed on the reverse guide side of the third stator core tooth portion 32-3 in the outer peripheral wall portion 35, and the depth of the second W-phase lead-out side gap 48-W3 is equal to the second depth d2. The second W-phase lead-in side gap 48-W4 is formed on the reverse guide side of the sixth stator core tooth portion 32-6 in the outer peripheral wall portion 35, and the depth of the second W-phase lead-in side gap 48-W4 is equal to the second depth d2.

[0050] That is, the four V-phase gaps 48-V1 to 48-V4 are formed in the same manner as the four U-phase gaps 48-U1 to 48-U4. Furthermore, the lower insulating frame 25 is configured such that when the lower insulating frame 25 is rotated 120 degrees around the rotation axis 16, the four U-phase gaps 48-U1 to 48-U4 of the rotated lower insulating frame 25 coincide with the four V-phase gaps 48-V1 to 48-V4 of the lower insulating frame 25 before rotation. Further, the four W-phase gaps 48-W1 to 48-W4 are formed in the same manner as the four U-phase gaps 48-U1 to 48-U4. In addition, the lower insulating frame 25 is configured such that after the lower insulating frame 25 is rotated 240 (=120+120) degrees around the rotating axis 16, the four U-phase gaps 48-U1~48-U4 of the rotated lower insulating frame 25 coincide with the four W-phase gaps 48-W1~48-W4 of the lower insulating frame 25 before rotation.

[0051] The first U-phase jumper wire 42-U1 passes through the first U-phase lead-out side slot 48-U1 and the first U-phase lead-in side slot 48-U2 such that a portion of the first U-phase jumper wire 42-U1 is disposed on the outer side of the outer peripheral wall portion 35. Furthermore, the first U-phase jumper wire 42-U1 contacts the bottom of the first U-phase lead-out side slot 48-U1 and the bottom of the first U-phase lead-in side slot 48-U2. Furthermore, the first U-phase jumper wire 42-U1 is disposed along the outer peripheral surface of the outer peripheral wall portion 35 in a non-flexible manner, with the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 35. Therefore, the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 35 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 35.

[0052] The second U-phase jumper wire 42-U2 passes through the second U-phase lead-out side slot 48-U3 and the second U-phase lead-in side slot 48-U4 such that a portion of the second U-phase jumper wire 42-U2 is disposed on the outer side of the outer peripheral wall portion 35. Furthermore, the second U-phase jumper wire 42-U2 contacts the bottom of the second U-phase lead-out side slot 48-U3 and the bottom of the second U-phase lead-in side slot 48-U4. Furthermore, the second U-phase jumper wire 42-U2 is disposed along the outer peripheral surface of the outer peripheral wall portion 35 in a non-flexible manner, with the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 35. Therefore, the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 35 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 35.

[0053] The first V-phase jumper wire 42-V1 passes through the first V-phase lead-out side slot 48-V1 and the first V-phase lead-in side slot 48-V2 such that a portion of the first V-phase jumper wire 42-V1 is disposed on the outer side of the outer peripheral wall portion 35. Furthermore, the first V-phase jumper wire 42-V1 contacts the bottom of the first V-phase lead-out side slot 48-V1 and the bottom of the first V-phase lead-in side slot 48-V2. Furthermore, the first V-phase jumper wire 42-V1 is disposed along the outer peripheral surface of the outer peripheral wall portion 35 in a non-flexible manner, with the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 35. Therefore, the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 35 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 35.

[0054] The second V-phase jumper wire 42-V2 passes through the second V-phase lead-out side slot 48-V3 and the second V-phase lead-in side slot 48-V4 such that a portion of the second V-phase jumper wire 42-V2 is disposed on the outer side of the outer peripheral wall portion 35. Furthermore, the second V-phase jumper wire 42-V2 contacts the bottom of the second V-phase lead-out side slot 48-V3 and the bottom of the second V-phase lead-in side slot 48-V4. Furthermore, the second V-phase jumper wire 42-V2 is disposed along the outer peripheral surface of the outer peripheral wall portion 35 in a non-flexible manner, with the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 35. Therefore, the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 35 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 35.

[0055] The first W-phase jumper wire 42-W1 passes through the first W-phase lead-out side slot 48-W1 and the first W-phase lead-in side slot 48-W2 such that a portion of the first W-phase jumper wire 42-W1 is disposed on the outer side of the outer peripheral wall portion 35. Furthermore, the first W-phase jumper wire 42-W1 contacts the bottom of the first W-phase lead-out side slot 48-W1 and the bottom of the first W-phase lead-in side slot 48-W2. Furthermore, the first W-phase jumper wire 42-W1 is disposed along the outer peripheral surface of the outer peripheral wall portion 35 in a non-flexible manner, with the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 35. Therefore, the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 35 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 35.

[0056] The second W-phase jumper wire 42-W2 passes through the second W-phase lead-out side slot 48-W3 and the second W-phase lead-in side slot 48-W4 such that a portion of the second W-phase jumper wire 42-W2 is disposed on the outer side of the outer peripheral wall portion 35. Furthermore, the second W-phase jumper wire 42-W2 contacts the bottom of the second W-phase lead-out side slot 48-W3 and the bottom of the second W-phase lead-in side slot 48-W4. Furthermore, the second W-phase jumper wire 42-W2 is disposed along the outer peripheral surface of the outer peripheral wall portion 35 in a non-flexible manner, with the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 35. Therefore, the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 35 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 35.

[0057] The lower insulating frame 25 also includes a plurality of retaining edges 49 corresponding to the plurality of jumper wires 42. The plurality of retaining edges 49 protrude outward from the outer peripheral surface of the outer peripheral wall portion 35. The retaining edge 49 corresponding to a particular jumper wire is positioned on the reverse guiding side of the portion of that jumper wire located on the outer side of the outer peripheral wall portion 35 and contacts that portion. Therefore, the stator 22 can prevent the portion of the plurality of jumper wires 42 located on the outer side of the outer peripheral wall portion 35 from shifting from a predetermined area in the outer peripheral surface of the outer peripheral wall portion 35 towards the reverse guiding side.

[0058] By forming the outer peripheral wall portion 35 of the lower insulating frame 25 as described above, the electric motor 5 can separate the multiple jumper wires 42 from each other, preventing them from contacting each other and ensuring the insulation between them. Furthermore, by forming multiple slits 48 of different depths—one of slits at a first depth d1 and another of slits at a second depth d2—the axial height of the outer peripheral wall portion 35 of the electric motor 5 can be reduced. In Embodiment 1, the multiple slits 48 include both slits at a first depth d1 and slits at a second depth d2. The second depth d2 is shallower than the first depth d1. Because the height of the outer peripheral wall portion 35 of the electric motor 5 is smaller, the axial height of the stator 22 can be reduced, and the axial height of the electric motor 5 can also be reduced. Similarly, because the height of the electric motor 5 of the compressor 1 is smaller, the axial height of the compressor 1 can be reduced.

[0059] The stator 22 is manufactured by using an automatic winding machine to properly mount the first U-phase conductor, the second U-phase conductor, the first V-phase conductor, the second V-phase conductor, the first W-phase conductor, and the second W-phase conductor onto the stator core 23, which is properly equipped with a lower insulating frame 25 and an upper insulating frame 26. The automatic winding machine includes outlet nozzles for the U-phase conductors, outlet nozzles for the V-phase conductors, and outlet nozzles for the W-phase conductors. The outlet nozzles for the U-phase conductors, the V-phase conductors, and the W-phase conductors are arranged in a synchronous manner on the automatic winding machine. The outlet nozzles for the U-phase conductor, V-phase conductor, and W-phase conductor are configured such that when they rotate 120 degrees around the central axis of the automatic winding machine, the U-phase outlet nozzle of the rotated automatic winding machine coincides with the V-phase outlet nozzle of the original automatic winding machine, and the V-phase outlet nozzle of the rotated automatic winding machine coincides with the W-phase outlet nozzle of the original automatic winding machine, and the W-phase outlet nozzle of the rotated automatic winding machine coincides with the U-phase outlet nozzle of the original automatic winding machine.

[0060] First, the stator core 23, with the lower insulating frame 25 and upper insulating frame 26 properly installed, is placed on the automatic winding machine in such a way that the central axis of the yoke 31 of the stator core 23 is aligned with the central axis of the automatic winding machine. After one end of the first U-phase conductor is positioned on the guide side of the first stator core tooth 32-1, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the first U-phase conductor to be wound counterclockwise on the first stator core tooth 32-1, forming the first U-phase power line 44-U1 and the first U-phase winding 24-U1. At this time, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, the automatic winding machine can cause the first V-phase conductor to be wound counterclockwise on the fifth stator core tooth 32-5, forming the first V-phase power line 44-V1 and the first V-phase winding 24-V1. The automatic winding machine also enables the first W-phase conductor to be wound counterclockwise on the ninth stator core teeth 32-9 by linking the outlet nozzle of the W-phase conductor with the outlet nozzle of the U-phase conductor, thereby forming the first V-phase power line 44-V1 and the first W-phase winding 24-W1 from the first W-phase conductor.

[0061] Next, the automatic winding machine moves the outlet nozzle of the U-phase conductor, causing the first U-phase conductor to pass through the first U-phase lead-out side gap 48-U1 and the first U-phase lead-in side gap 48-U2 of the outer peripheral wall portion 35 of the lower insulation frame 25, forming the first U-phase jumper wire 42-U1. At this time, the automatic winding machine, by linking the outlet nozzle of the V-phase conductor with the outlet nozzle of the U-phase conductor, enables the first V-phase conductor to pass through the first V-phase lead-out side gap 48-V1 and the first V-phase lead-in side gap 48-V2, forming the first V-phase jumper wire 42-V1. The automatic winding machine also, by linking the outlet nozzle of the W-phase conductor with the outlet nozzle of the U-phase conductor, enables the first W-phase conductor to pass through the first W-phase lead-out side gap 48-W1 and the first W-phase lead-in side gap 48-W2, forming the first W-phase jumper wire 42-W1.

[0062] Next, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the first U-phase conductor to be wound counterclockwise on the fourth stator core tooth section 32-4. The other end of the first U-phase conductor is positioned on the guide side of the fourth stator core tooth section 32-4, forming the second U-phase winding 24-U2 and the first U-phase neutral line 43-U1. At this time, the automatic winding machine, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, enables the first V-phase conductor to be wound counterclockwise on the eighth stator core tooth section 32-8, with the other end positioned on the guide side of the eighth stator core tooth section 32-8. The first V-phase conductor forms the second V-phase winding 24-V2 and the first V-phase neutral line 43-V1. The automatic winding machine also enables the first W-phase conductor to be wound counterclockwise on the twelfth stator core tooth 32-12 by linking the outlet nozzle of the W-phase conductor with the outlet nozzle of the U-phase conductor, and the other end of the first W-phase conductor is positioned on the guide side of the twelfth stator core tooth 32-12, forming the second W-phase winding 24-W2 and the first W-phase neutral line 43-W1 from the first W-phase conductor.

[0063] Next, after one end of the second U-phase conductor is positioned on the guide side of the seventh stator core tooth section 32-7, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the second U-phase conductor to be wound counterclockwise on the seventh stator core tooth section 32-7, forming the second U-phase power line 44-U2 and the third U-phase winding 24-U3. At this time, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, the automatic winding machine can, after one end of the second V-phase conductor is positioned on the guide side of the eleventh stator core tooth section 32-11, cause the second V-phase conductor to be wound counterclockwise on the eleventh stator core tooth section 32-11, forming the second V-phase power line 44-V2 and the third V-phase winding 24-V3. The automatic winding machine also enables the W-phase conductor outlet nozzle to be linked with the U-phase conductor outlet nozzle, so that after one end of the second W-phase conductor is positioned on the guide side of the third stator core tooth 32-3, the second W-phase conductor is wound counterclockwise on the third stator core tooth 32-3, forming the second W-phase power line 44-W2 and the third W-phase winding 24-W3.

[0064] Next, the automatic winding machine moves the outlet nozzle of the U-phase conductor, causing the second U-phase conductor to pass through the second U-phase lead-out side gap 48-U3 and the second U-phase lead-in side gap 48-U4 of the outer peripheral wall portion 35 of the lower insulation frame 25, forming the second U-phase jumper wire 42-U2 from the second V-phase conductor. At this time, by linking the outlet nozzle of the V-phase conductor with the outlet nozzle of the U-phase conductor, the automatic winding machine can cause the second V-phase conductor to pass through the second V-phase lead-out side gap 48-V3 and the second V-phase lead-in side gap 48-V4 of the outer peripheral wall portion 35 of the lower insulation frame 25, forming the second V-phase jumper wire 42-V2 from the second V-phase conductor. The automatic winding machine also enables the second W phase conductor to pass through the second W phase lead-out side gap 48-W3 and the second W phase lead-in side gap 48-W4 of the outer peripheral wall 35 of the lower insulation frame 25 by linking the lead-out nozzle of the W phase conductor with the lead-out nozzle of the U phase conductor, thereby forming the second W phase jumper wire 42-W2.

[0065] Next, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the second U-phase conductor to be wound counterclockwise on the tenth stator core tooth section 32-10. The other end of the second U-phase conductor is positioned on the guide side of the tenth stator core tooth section 32-10, forming the fourth U-phase winding 24-U4 and the second U-phase neutral line 43-U2. At this time, the automatic winding machine, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, enables the second V-phase conductor to be wound counterclockwise on the second stator core tooth section 32-2, with the other end positioned on the guide side of the second stator core tooth section 32-2. The second V-phase conductor forms the fourth V-phase winding 24-V4 and the second V-phase neutral line 43-V2. The automatic winding machine also enables the second W-phase conductor to be wound counterclockwise on the sixth stator core tooth 32-6 by linking the outlet nozzle of the W-phase conductor with the outlet nozzle of the U-phase conductor, and the other end of the second W-phase conductor is positioned on the guide side of the sixth stator core tooth 32-6, forming the fourth W-phase winding 24-W4 and the second W-phase neutral line 43-W2.

[0066] That is, because the stator 22 has the same shape for the four U-phase gaps 48-U1~48-U4, the four V-phase gaps 48-V1~48-V4, and the four W-phase gaps 48-W1~48-W4, it can be easily manufactured by an automatic winding machine. Even when the stator 22 is manufactured by this automatic winding machine, the motor 5 can avoid contact between the multiple jumper wires 42, while achieving miniaturization.

[0067] Operation of compressor 1 Compressor 1 is, for example, located in a refrigerant circuit (not shown). Motor 5 supplies three-phase alternating current to multiple windings 24 via U-phase power terminal 8U, V-phase power terminal 8V, and W-phase power terminal 8W, thereby generating a rotating magnetic field in the space inside stator 22. Rotor 21 rotates about rotation axis 16 according to the rotating magnetic field generated by stator 22. Shaft 3 rotates about rotation axis 16 based on the rotation of rotor 21, transmitting the rotation of rotor 21 to compressor 6. Compressor 6, based on the rotation of shaft 3, draws in low-pressure gaseous refrigerant from the pre-stage device of compressor 1 in the refrigerant circuit via suction pipe 11, and compresses the drawn-in low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant is compressed by compressor 6 into high-pressure gaseous refrigerant. Compressor 6 supplies high-pressure gaseous refrigerant to the space between compressor 6 and motor 5 in internal space 7.

[0068] High-pressure gaseous refrigerant supplied to the space between the compressor unit 6 and the motor 5 in the internal space 7 passes through the gap formed in the motor 5, thereby being supplied to the space above the motor 5 in the internal space 7. The high-pressure gaseous refrigerant supplied to the space above the motor 5 in the internal space 7 is discharged through the discharge pipe 12 to the downstream device of the compressor 1 in the refrigerant circuit. The compressor 1 circulates the refrigerant in the refrigerant circuit by performing the above-described operation.

[0069] Comparative Example 1: Electric Motor like Figure 6 As shown, similar to the stator 22 of the motor 5 described above, the stator 101 of the motor in Comparative Example 1 has a stator core 23, multiple windings 24, and an upper insulating frame 26, while the lower insulating frame 25 of the motor 5 described above has been replaced with another lower insulating frame 102. Figure 6 This is an unfolded view of the stator 101 of the electric motor in Comparative Example 1. The lower insulating frame 102, like the lower insulating frame 25 described above, has multiple insulating frame teeth 36-1 to 36-12, while the outer peripheral wall portion 35 is replaced by other outer peripheral wall portions 103. The outer peripheral wall portions 103 have multiple slots 104. The multiple slots 104 include four U-phase slots 104-U1 to 104-U4, four V-phase slots 104-V1 to 104-V4, and four W-phase slots 104-W1 to 104-W4.

[0070] The first U-phase lead-out side gap 104-U1 is formed on the reverse guide side of the first stator core tooth 32-1 in the outer peripheral wall portion 103, and its depth is equal to the first depth d1. The first U-phase lead-out side gap 104-U2 is formed on the reverse guide side of the fourth stator core tooth 32-4 in the outer peripheral wall portion 103, and its depth is equal to the second depth d2. The second depth d2 is shallower than the first depth d1. The second U-phase lead-out side gap 104-U3 is formed on the reverse guide side of the seventh stator core tooth 32-7 in the outer peripheral wall portion 103, and its depth is equal to the second depth d2. The second U-phase introduction side gap 104-U4 is formed on the reverse guide side of the tenth stator core tooth portion 32-10 in the outer peripheral wall portion 103, and the depth of the second U-phase introduction side gap 104-U4 is equal to the third depth d3. The third depth d3 is shallower than the second depth d2.

[0071] The first V-phase lead-out side gap 104-V1 is formed on the reverse guiding side of the second stator core tooth 32-2 in the outer peripheral wall portion 103, and the depth of the first V-phase lead-out side gap 104-V1 is equal to the first depth d1. The first V-phase lead-in side gap 104-V2 is formed on the reverse guiding side of the fifth stator core tooth 32-5 in the outer peripheral wall portion 103, and the depth of the first V-phase lead-in side gap 104-V2 is equal to the second depth d2. The second V-phase lead-out side gap 104-V3 is formed on the reverse guiding side of the eighth stator core tooth 32-8 in the outer peripheral wall portion 103, and the depth of the second V-phase lead-out side gap 104-V3 is equal to the second depth d2. The second V-phase introduction side gap 104-V4 is formed on the reverse guide side of the eleventh stator core tooth portion 32-11 in the outer peripheral wall portion 103, and the depth of the second V-phase introduction side gap 104-V4 is equal to the third depth d3.

[0072] The first W-phase lead-out side gap 104-W1 is formed on the reverse guide side of the sixth stator core tooth 32-6 in the outer peripheral wall portion 103, and its depth is equal to a first depth d1. The first W-phase lead-out side gap 104-W2 is formed on the reverse guide side of the ninth stator core tooth 32-9 in the outer peripheral wall portion 103, and its depth is equal to a second depth d2. The second W-phase lead-out side gap 104-W3 is formed on the reverse guide side of the twelfth stator core tooth 32-12 in the outer peripheral wall portion 103, and its depth is equal to a second depth d2. The second W-phase introduction side gap 104-W4 is formed on the reverse guide side of the third stator core tooth portion 32-3 in the outer peripheral wall portion 103, and the depth of the second W-phase introduction side gap 104-W4 is equal to the third depth d3.

[0073] That is, the four V-phase gaps 104-V1 to 104-V4 are formed in the same manner as the four U-phase gaps 104-U1 to 104-U4. Furthermore, the lower insulating frame 25 is configured such that, after rotating the lower insulating frame 25 30 degrees around the rotation axis 16, the four U-phase gaps 104-U1 to 104-U4 of the rotated lower insulating frame 25 coincide with the four V-phase gaps 104-V1 to 104-V4 of the lower insulating frame 25 before rotation. Further, the four W-phase gaps 104-W1 to 104-W4 are formed in the same manner as the four U-phase gaps 104-U1 to 104-U4. In addition, the lower insulating frame 25 is configured such that after the lower insulating frame 25 is rotated 150 (=30+120) degrees around the rotating axis 16, the four U-phase gaps 104-U1~104-U4 of the rotated lower insulating frame 25 coincide with the four W-phase gaps 104-W1~104-W4 of the lower insulating frame 25 before rotation.

[0074] Furthermore, the wiring combination of the multiple windings 24 of the motor in Comparative Example 1 differs from that of the motor 5 in Embodiment 1. Specifically, in the first U-phase series connection 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the third U-phase winding 24-U3. In the second U-phase series connection 45-U2, the second U-phase winding 24-U2 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection 45-U1 and the second U-phase series connection 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. In other words, the multiple windings 24 of the motor in Comparative Example 1 are arranged such that the adjacent poles of the multiple windings 24 are connected.

[0075] The first U-phase jumper wire 42-U1 passes through the first U-phase lead-out side slot 48-U1 and the first U-phase lead-in side slot 48-U2, and contacts the bottom of the first U-phase lead-out side slot 48-U1 and the bottom of the first U-phase lead-in side slot 48-U2. Further, the first U-phase jumper wire 42-U1 is arranged along the outer peripheral surface of the outer peripheral wall portion 103 in a non-flexible manner on a portion disposed on the outer side of the outer peripheral wall portion 103. Therefore, the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 103 is inclined relative to a plane perpendicular to the rotation axis 16.

[0076] The second U-phase jumper wire 42-U2 passes through the second U-phase lead-out side slot 48-U3 and the second U-phase lead-in side slot 48-U4, and contacts the bottom of the second U-phase lead-out side slot 48-U3 and the bottom of the second U-phase lead-in side slot 48-U4. Further, the second U-phase jumper wire 42-U2 is arranged along the outer peripheral surface of the outer peripheral wall portion 103 in a non-flexible manner on a portion disposed on the outer side of the outer peripheral wall portion 103. Therefore, the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 103 is inclined relative to a plane perpendicular to the rotation axis 16.

[0077] The first V-phase jumper wire 42-V1 passes through the first V-phase lead-out side slot 48-V1 and the first V-phase lead-in side slot 48-V2, and contacts the bottom of the first V-phase lead-out side slot 48-V1 and the bottom of the first V-phase lead-in side slot 48-V2. Further, the first V-phase jumper wire 42-V1 is arranged along the outer peripheral surface of the outer peripheral wall portion 103 in a non-flexible manner on a portion disposed on the outer side of the outer peripheral wall portion 103. Therefore, the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 103 is inclined relative to a plane perpendicular to the rotation axis 16.

[0078] The second V-phase jumper wire 42-V2 passes through the second V-phase lead-out side slot 48-V3 and the second V-phase lead-in side slot 48-V4, and contacts the bottom of the second V-phase lead-out side slot 48-V3 and the bottom of the second V-phase lead-in side slot 48-V4. Further, the second V-phase jumper wire 42-V2 is arranged along the outer peripheral surface of the outer peripheral wall portion 103 in a non-flexible manner. Therefore, the portion of the second V-phase jumper wire 42-V2 arranged on the outer side of the outer peripheral wall portion 103 is inclined relative to a plane perpendicular to the rotation axis 16.

[0079] The first W-phase jumper wire 42-W1 passes through the first W-phase lead-out side slot 48-W1 and the first W-phase lead-in side slot 48-W2, and contacts the bottom of the first W-phase lead-out side slot 48-W1 and the bottom of the first W-phase lead-in side slot 48-W2. Further, the first W-phase jumper wire 42-W1 is arranged along the outer peripheral surface of the outer peripheral wall portion 103 in a non-flexible manner on a portion disposed on the outer side of the outer peripheral wall portion 103. Therefore, the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 103 is inclined relative to a plane perpendicular to the rotation axis 16.

[0080] The second W-phase jumper wire 42-W2 passes through the second W-phase lead-out side slot 48-W3 and the second W-phase lead-in side slot 48-W4, and contacts the bottom of the second W-phase lead-out side slot 48-W3 and the bottom of the second W-phase lead-in side slot 48-W4. Further, the second W-phase jumper wire 42-W2 is arranged along the outer peripheral surface of the outer peripheral wall portion 103 in a non-flexible manner. Therefore, the portion of the second W-phase jumper wire 42-W2 arranged on the outer side of the outer peripheral wall portion 103 is inclined relative to the plane perpendicular to the rotation axis 16.

[0081] Because the multiple gaps 104 of the outer peripheral wall portion 103 in Comparative Example 1 are formed by three different gaps of varying depths, the height of the outer peripheral wall portion 103 is greater than the height of the outer peripheral wall portion 35 of the motor 5 in Embodiment 1. That is, compared to the motor in Comparative Example 1, the height of the outer peripheral wall portion 35 of the motor 5 in Embodiment 1 can be reduced, thus reducing the overall height of the motor 5. Furthermore, the second V-phase jumper wire 42-V2 of the motor in Comparative Example 1 is close to the first W-phase jumper wire 42-W1, thus posing a risk of contact with the first W-phase jumper wire 42-W1. In other words, compared to the motor in Comparative Example 1, the motor 5 in Embodiment 1 can keep the jumper wires of different phases in the multiple jumper wires 42 further apart, more reliably preventing contact between the jumper wires of different phases in the multiple jumper wires 42.

[0082] In Comparative Example 1, the motor achieves a third depth d3 by making the depths of the second U-phase lead-out side gaps 104-U3, 104-V3, and 104-W3 equal to the third depth d3, and the depths of the second U-phase lead-in side gaps 104-U4, 104-V4, and 104-W4 equal to a fourth depth shallower than the third depth d3. This allows the second V-phase jumper wire 42-V2 to be kept away from the first W-phase jumper wire 42-W1, preventing the second V-phase jumper wire 42-V2 from contacting the jumper wire of a different phase, i.e., the first W-phase jumper wire 42-W1. However, in this case, because the multiple gaps 104 in Comparative Example 1 are formed by four different depths, the height of the outer peripheral wall portion 103 is further increased.

[0083] Comparative Example 2: Electric Motor like Figure 7 As shown, similar to the stator 22 of the motor 5 described above, the stator 111 of the motor of Comparative Example 2 has a stator core 23, multiple windings 24, and an upper insulating frame 26, while the lower insulating frame 25 of the motor 5 described above has been replaced with another lower insulating frame 112. Figure 7 This is an unfolded view of the stator 111 of the motor in Comparative Example 2. The lower insulating frame 112, like the lower insulating frame 25 described above, has multiple insulating frame teeth 36-1 to 36-12, while the outer peripheral wall portion 35 is replaced by other outer peripheral wall portions 113. The outer peripheral wall portions 113 have multiple slots 114. The multiple slots 114 include four U-phase slots 114-U1 to 114-U4, four V-phase slots 114-V1 to 114-V4, and four W-phase slots 114-W1 to 114-W4.

[0084] The first U-phase lead-out side gap 114-U1 is formed on the reverse guide side of the first stator core tooth 32-1 in the outer peripheral wall portion 113, and its depth is equal to the first depth d1. The first U-phase lead-out side gap 114-U2 is formed on the reverse guide side of the fourth stator core tooth 32-4 in the outer peripheral wall portion 113, and its depth is equal to the second depth d2. The second depth d2 is shallower than the first depth d1. The second U-phase lead-out side gap 114-U3 is formed on the reverse guide side of the seventh stator core tooth 32-7 in the outer peripheral wall portion 113, and its depth is equal to the second depth d2. The second U-phase introduction side gap 114-U4 is formed on the reverse guide side of the tenth stator core tooth portion 32-10 in the outer peripheral wall portion 113, and the depth of the second U-phase introduction side gap 114-U4 is equal to the third depth d3. The third depth d3 is shallower than the second depth d2.

[0085] The first V-phase lead-out side gap 114-V1 is formed on the reverse guide side of the fifth stator core tooth 32-5 in the outer peripheral wall portion 113, and the depth of the first V-phase lead-out side gap 114-V1 is equal to the first depth d1. The first V-phase lead-in side gap 114-V2 is formed on the reverse guide side of the eighth stator core tooth 32-8 in the outer peripheral wall portion 113, and the depth of the first V-phase lead-in side gap 114-V2 is equal to the second depth d2. The second V-phase lead-out side gap 114-V3 is formed on the reverse guide side of the eleventh stator core tooth 32-11 in the outer peripheral wall portion 113, and the depth of the second V-phase lead-out side gap 114-V3 is equal to the second depth d2. The second V-phase introduction side gap 114-V4 is formed on the reverse guide side of the second stator core tooth portion 32-2 in the outer peripheral wall portion 113, and the depth of the second V-phase introduction side gap 114-V4 is equal to the third depth d3.

[0086] The first W-phase lead-out side gap 114-W1 is formed on the reverse guiding side of the third stator core tooth 32-3 in the outer peripheral wall portion 113, and its depth is equal to a first depth d1. The first W-phase lead-out side gap 114-W2 is formed on the reverse guiding side of the sixth stator core tooth 32-6 in the outer peripheral wall portion 113, and its depth is equal to a second depth d2. The second W-phase lead-out side gap 114-W3 is formed on the reverse guiding side of the ninth stator core tooth 32-9 in the outer peripheral wall portion 113, and its depth is equal to a second depth d2. The second W-phase introduction side gap 114-W4 is formed on the reverse guide side of the twelfth stator core tooth portion 32-12 in the outer peripheral wall portion 113, and the depth of the second W-phase introduction side gap 114-W4 is equal to the third depth d3.

[0087] That is, the four V-phase gaps 114-V1 to 114-V4 are formed in the same manner as the four U-phase gaps 114-U1 to 114-U4. Furthermore, the lower insulating frame 112 is configured such that, after rotating the lower insulating frame 112 60 degrees around the rotation axis 16, the four U-phase gaps 114-U1 to 114-U4 of the rotated lower insulating frame 112 coincide with the four V-phase gaps 114-V1 to 114-V4 of the lower insulating frame 112 before rotation. Further, the four W-phase gaps 114-W1 to 114-W4 are formed in the same manner as the four U-phase gaps 114-U1 to 114-U4. In addition, the lower insulating frame 112 is configured such that after the lower insulating frame 112 is rotated 120 (=60+60) degrees around the rotation axis 16, the four U-phase gaps 114-U1~114-U4 of the rotated lower insulating frame 112 coincide with the four W-phase gaps 114-W1~114-W4 of the lower insulating frame 112 before rotation.

[0088] Furthermore, the wiring configuration of the multiple windings 24 of the motor in Comparative Example 2 differs from that of the motor 5 in Embodiment 1. Specifically, in the first U-phase series connection 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the second U-phase winding 24-U2. In the second U-phase series connection 45-U2, the third U-phase winding 24-U3 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection 45-U1 and the second U-phase series connection 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. In other words, the multiple windings 24 of the motor in Comparative Example 2 are arranged in a manner where multiple windings 24 are connected adjacent to each other.

[0089] The first U-phase jumper wire 42-U1 passes through the first U-phase lead-out side slot 48-U1 and the first U-phase lead-in side slot 48-U2, and contacts the bottom of the first U-phase lead-out side slot 48-U1 and the bottom of the first U-phase lead-in side slot 48-U2. Further, the first U-phase jumper wire 42-U1 is arranged along the outer peripheral surface of the outer peripheral wall portion 113 in a non-flexible manner on a portion disposed on the outer side of the outer peripheral wall portion 113. Therefore, the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 113 is inclined relative to a plane perpendicular to the rotation axis 16.

[0090] The second U-phase jumper wire 42-U2 passes through the second U-phase lead-out side slot 48-U3 and the second U-phase lead-in side slot 48-U4, and contacts the bottom of the second U-phase lead-out side slot 48-U3 and the bottom of the second U-phase lead-in side slot 48-U4. Further, the second U-phase jumper wire 42-U2 is arranged along the outer peripheral surface of the outer peripheral wall portion 113 in a non-flexible manner. Therefore, the portion of the second U-phase jumper wire 42-U2 arranged on the outer side of the outer peripheral wall portion 113 is inclined relative to a plane perpendicular to the rotation axis 16.

[0091] The first V-phase jumper wire 42-V1 passes through the first V-phase lead-out side slot 48-V1 and the first V-phase lead-in side slot 48-V2, and contacts the bottom of the first V-phase lead-out side slot 48-V1 and the bottom of the first V-phase lead-in side slot 48-V2. Further, the first V-phase jumper wire 42-V1 is arranged along the outer peripheral surface of the outer peripheral wall portion 113 in a non-flexible manner. Therefore, the portion of the first V-phase jumper wire 42-V1 arranged on the outer side of the outer peripheral wall portion 113 is inclined relative to the plane perpendicular to the rotation axis 16.

[0092] The second V-phase jumper wire 42-V2 passes through the second V-phase lead-out side slot 48-V3 and the second V-phase lead-in side slot 48-V4, and contacts the bottom of the second V-phase lead-out side slot 48-V3 and the bottom of the second V-phase lead-in side slot 48-V4. Further, the second V-phase jumper wire 42-V2 is arranged along the outer peripheral surface of the outer peripheral wall portion 113 in a non-flexible manner. Therefore, the portion of the second V-phase jumper wire 42-V2 arranged on the outer side of the outer peripheral wall portion 113 is inclined relative to a plane perpendicular to the rotation axis 16.

[0093] The first W-phase jumper wire 42-W1 passes through the first W-phase lead-out side slot 48-W1 and the first W-phase lead-in side slot 48-W2, and contacts the bottom of the first W-phase lead-out side slot 48-W1 and the bottom of the first W-phase lead-in side slot 48-W2. Further, the first W-phase jumper wire 42-W1 is arranged along the outer peripheral surface of the outer peripheral wall portion 113 in a non-flexible manner. Therefore, the portion of the first W-phase jumper wire 42-W1 arranged on the outer side of the outer peripheral wall portion 113 is inclined relative to the plane perpendicular to the rotation axis 16.

[0094] The second W-phase jumper wire 42-W2 passes through the second W-phase lead-out side slot 48-W3 and the second W-phase lead-in side slot 48-W4, and contacts the bottom of the second W-phase lead-out side slot 48-W3 and the bottom of the second W-phase lead-in side slot 48-W4. Further, the second W-phase jumper wire 42-W2 is arranged along the outer peripheral surface of the outer peripheral wall portion 113 in a non-flexible manner. Therefore, the portion of the second W-phase jumper wire 42-W2 arranged on the outer side of the outer peripheral wall portion 113 is inclined relative to the plane perpendicular to the rotation axis 16.

[0095] Because the multiple gaps 114 in Comparative Example 2 are formed by three different gaps of varying depths, the height of the outer peripheral wall portion 113 is greater than the height of the outer peripheral wall portion 35 of the motor 5 in Embodiment 1. That is, compared to the motor in Comparative Example 2, the height of the outer peripheral wall portion 35 of the motor 5 in Embodiment 1 can be reduced, thus reducing the overall height of the motor 5. Furthermore, the second U-phase jumper wire 42-U2 of the motor in Comparative Example 2 is close to the first V-phase jumper wire 42-V1, thus posing a risk of contact with the first V-phase jumper wire 42-V1. In other words, compared to the motor in Comparative Example 2, the motor 5 in Embodiment 1 can keep the jumper wires of different phases in the multiple jumper wires 42 further apart, more reliably preventing contact between the jumper wires of different phases in the multiple jumper wires 42.

[0096] In Comparative Example 2, the motor achieves a third depth d3 by making the depths of the second U-phase lead-out side gaps 114-U3, 114-V3, and 114-W3 equal to the third depth d3, and the depths of the second U-phase lead-in side gaps 114-U4, 114-V4, and 114-W4 equal to a fourth depth shallower than the third depth d3. This allows the second U-phase jumper wire 42-U2 to be kept away from the first V-phase jumper wire 42-V1, preventing the second U-phase jumper wire 42-U2 from contacting the jumper wire of a different phase, i.e., the first V-phase jumper wire 42-V1. However, since the multiple gaps 114 in the motor of Comparative Example 2 are formed by four different depths, the height of the outer peripheral wall portion 113 is further increased.

[0097] Comparative Example 3: Electric Motor like Figure 8 As shown, similar to the stator 22 of the motor 5 described above, the stator 121 of the motor of Comparative Example 3 has a stator core 23, multiple windings 24, and an upper insulating frame 26, while the lower insulating frame 25 of the motor 5 described above has been replaced with another lower insulating frame 122. Figure 8This is an unfolded view of the stator 121 of the motor in Comparative Example 3. The lower insulating frame 122, like the lower insulating frame 25 described above, has multiple insulating frame teeth 36-1 to 36-12, while the outer peripheral wall portion 35 is replaced by other outer peripheral wall portions 123. The outer peripheral wall portions 123 have multiple slots 124. The multiple slots 124 include four U-phase slots 124-U1 to 124-U4, four V-phase slots 124-V1 to 124-V4, and four W-phase slots 124-W1 to 124-W4.

[0098] The first U-phase lead-out side gap 124-U1 is formed on the reverse guide side of the first stator core tooth 32-1 in the outer peripheral wall portion 123, and its depth is equal to the first depth d1. The first U-phase lead-out side gap 124-U2 is formed on the reverse guide side of the fourth stator core tooth 32-4 in the outer peripheral wall portion 123, and its depth is equal to the second depth d2. The second depth d2 is shallower than the first depth d1. The second U-phase lead-out side gap 124-U3 is formed on the reverse guide side of the seventh stator core tooth 32-7 in the outer peripheral wall portion 123, and its depth is equal to the second depth d2. The second U-phase introduction side gap 124-U4 is formed on the reverse guide side of the tenth stator core tooth portion 32-10 in the outer peripheral wall portion 123, and the depth of the second U-phase introduction side gap 124-U4 is equal to the third depth d3. The third depth d3 is shallower than the second depth d2.

[0099] The first V-phase lead-out side gap 124-V1 is formed on the reverse guiding side of the eighth stator core tooth 32-8 in the outer peripheral wall portion 123, and the depth of the first V-phase lead-out side gap 124-V1 is equal to the first depth d1. The first V-phase lead-in side gap 124-V2 is formed on the reverse guiding side of the eleventh stator core tooth 32-11 in the outer peripheral wall portion 123, and the depth of the first V-phase lead-in side gap 124-V2 is equal to the second depth d2. The second V-phase lead-out side gap 124-V3 is formed on the reverse guiding side of the second stator core tooth 32-2 in the outer peripheral wall portion 123, and the depth of the second V-phase lead-out side gap 124-V3 is equal to the second depth d2. The second V-phase introduction side gap 124-V4 is formed on the reverse guide side of the fifth stator core tooth portion 32-5 in the outer peripheral wall portion 123, and the depth of the second V-phase introduction side gap 124-V4 is equal to the third depth d3.

[0100] The first W-phase lead-out side gap 124-W1 is formed on the reverse guiding side of the third stator core tooth 32-3 in the outer peripheral wall portion 123, and its depth is equal to a first depth d1. The first W-phase lead-out side gap 124-W2 is formed on the reverse guiding side of the sixth stator core tooth 32-6 in the outer peripheral wall portion 123, and its depth is equal to a second depth d2. The second W-phase lead-out side gap 124-W3 is formed on the reverse guiding side of the ninth stator core tooth 32-9 in the outer peripheral wall portion 123, and its depth is equal to a second depth d2. The second W-phase introduction side gap 124-W4 is formed on the reverse guide side of the twelfth stator core tooth portion 32-12 in the outer peripheral wall portion 123, and the depth of the second W-phase introduction side gap 124-W4 is equal to the third depth d3.

[0101] That is, the four V-phase gaps 124-V1 to 124-V4 are formed in the same manner as the four U-phase gaps 124-U1 to 124-U4. Furthermore, the lower insulating frame 112 is configured such that, after rotating the lower insulating frame 112 210 degrees around the rotation axis 16, the four U-phase gaps 124-U1 to 124-U4 of the rotated lower insulating frame 112 coincide with the four V-phase gaps 124-V1 to 124-V4 of the lower insulating frame 112 before rotation. Further, the four W-phase gaps 124-W1 to 124-W4 are formed in the same manner as the four U-phase gaps 124-U1 to 124-U4. In addition, the lower insulating frame 112 is configured such that after the lower insulating frame 112 is rotated 60 degrees around the rotation axis 16, the four U-phase gaps 124-U1 to 124-U4 of the rotated lower insulating frame 112 coincide with the four W-phase gaps 124-W1 to 124-W4 of the lower insulating frame 112 before rotation.

[0102] Furthermore, the wiring combination of the multiple windings 24 of the motor in Comparative Example 3 differs from that of the motor 5 in Embodiment 1. Specifically, in the first U-phase series connection 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the second U-phase winding 24-U2. In the second U-phase series connection 45-U2, the third U-phase winding 24-U3 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection 45-U1 and the second U-phase series connection 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. In other words, the multiple windings 24 of the motor in Comparative Example 3 are arranged in a manner where multiple windings 24 are connected adjacent to each other.

[0103] The first U-phase jumper wire 42-U1 passes through the first U-phase lead-out side slot 124-U1 and the first U-phase lead-in side slot 124-U2, and contacts the bottom of the first U-phase lead-out side slot 124-U1 and the bottom of the first U-phase lead-in side slot 124-U2. Further, the first U-phase jumper wire 42-U1 is arranged along the outer peripheral surface of the outer peripheral wall portion 123 in a non-flexible manner on a portion disposed on the outer side of the outer peripheral wall portion 123. Therefore, the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 123 is inclined relative to a plane perpendicular to the rotation axis 16.

[0104] The second U-phase jumper wire 42-U2 passes through the second U-phase lead-out side slot 124-U3 and the second U-phase lead-in side slot 124-U4, and contacts the bottom of the second U-phase lead-out side slot 124-U3 and the bottom of the second U-phase lead-in side slot 124-U4. Further, the second U-phase jumper wire 42-U2 is arranged along the outer peripheral surface of the outer peripheral wall portion 123 in a non-flexible manner. Therefore, the portion of the second U-phase jumper wire 42-U2 arranged on the outer side of the outer peripheral wall portion 123 is inclined relative to the plane perpendicular to the rotation axis 16.

[0105] The first V-phase jumper wire 42-V1 passes through the first V-phase lead-out side slot 124-V1 and the first V-phase lead-in side slot 124-V2, and contacts the bottom of the first V-phase lead-out side slot 124-V1 and the bottom of the first V-phase lead-in side slot 124-V2. Further, the first V-phase jumper wire 42-V1 is arranged along the outer peripheral surface of the outer peripheral wall portion 123 in a non-flexible manner. Therefore, the portion of the first V-phase jumper wire 42-V1 arranged on the outer side of the outer peripheral wall portion 123 is inclined relative to the plane perpendicular to the rotation axis 16.

[0106] The second V-phase jumper wire 42-V2 passes through the second V-phase lead-out side slot 124-V3 and the second V-phase lead-in side slot 124-V4, and contacts the bottom of the second V-phase lead-out side slot 124-V3 and the bottom of the second V-phase lead-in side slot 124-V4. Further, the second V-phase jumper wire 42-V2 is arranged along the outer peripheral surface of the outer peripheral wall portion 123 in a non-flexible manner. Therefore, the portion of the second V-phase jumper wire 42-V2 arranged on the outer side of the outer peripheral wall portion 123 is inclined relative to the plane perpendicular to the rotation axis 16.

[0107] The first W-phase jumper wire 42-W1 passes through the first W-phase lead-out side slot 124-W1 and the first W-phase lead-in side slot 124-W2, and contacts the bottom of the first W-phase lead-out side slot 124-W1 and the bottom of the first W-phase lead-in side slot 124-W2. Further, the first W-phase jumper wire 42-W1 is arranged along the outer peripheral surface of the outer peripheral wall portion 123 in a non-flexible manner. Therefore, the portion of the first W-phase jumper wire 42-W1 arranged on the outer side of the outer peripheral wall portion 123 is inclined relative to the plane perpendicular to the rotation axis 16.

[0108] The second W-phase jumper wire 42-W2 passes through the second W-phase lead-out side slot 124-W3 and the second W-phase lead-in side slot 124-W4, and contacts the bottom of the second W-phase lead-out side slot 124-W3 and the bottom of the second W-phase lead-in side slot 124-W4. Further, the second W-phase jumper wire 42-W2 is arranged along the outer peripheral surface of the outer peripheral wall portion 123 in a non-flexible manner. Therefore, the portion of the second W-phase jumper wire 42-W2 arranged on the outer side of the outer peripheral wall portion 123 is inclined relative to the plane perpendicular to the rotation axis 16.

[0109] Since the multiple slits 124 are formed by three different slits of varying depths, the height of the outer peripheral wall portion 123 is greater than the height of the outer peripheral wall portion 35 of the motor 5 in Embodiment 1. That is, compared to the motor in Comparative Example 3, the height of the outer peripheral wall portion 35 of the motor 5 in Embodiment 1 can be reduced, thus reducing the overall height of the motor 5.

[0110] Effect of motor 5 in Example 1 The electric motor 5 of Embodiment 1 includes a rotor 21 and a stator 22 for generating a magnetic field that causes the rotor 21 to rotate about a rotation axis 16. The stator 22 includes a stator core 23, an outer peripheral wall 35 of a cylindrical lower insulating frame 25, and a plurality of windings 24. The stator core 23 includes an annular yoke 31 surrounding the outer peripheral side of the rotor 21, and a plurality of stator core teeth 32-1 to 32-12 protruding from the inner peripheral side of the yoke 31 toward the rotor 21 and arranged circumferentially. The outer peripheral wall 35 is disposed at one end of the stator core 23 in an axial direction parallel to the rotation axis 16. The plurality of windings 24 are formed by winding wires around each of the plurality of stator core teeth 32-1 to 32-12. The multiple windings 24 have four U-phase windings 24-U1~24-U4, four V-phase windings 24-V1~24-V4, and four W-phase windings 24-W1~24-W4, and the multiple windings 24 are arranged in a manner that is different from each other in the circumferential direction of adjacent windings in the stator core 23.

[0111] In stator 22, for the U phase, there are two U-phase jumpers 42-U1 to 42-U2. One of the U-phase jumpers 42-U1 to 42-U2, namely the first U-phase jumper 42-U1, connects the first U-phase winding 24-U1 to the second U-phase winding 24-U2 of the four U-phase windings 24-U1 to 24-U4. The other U-phase jumper 42-U2 connects the third U-phase winding 24-U3 to the fourth U-phase winding 24-U4. In stator 22, for both the U phase and V phase, similar to the U phase, each phase has two jumpers.

[0112] The outer peripheral wall 35 of the lower insulating frame 25 has a plurality of slits 48. A jumper wire connecting to the winding end point of the winding is led out from a plurality of lead-out side slits among the plurality of slits 48. A jumper wire connecting to the winding start point of the winding is introduced from a plurality of lead-in side slits among the plurality of slits 48. Each of the plurality of jumper wires 42 passes through both the lead-out side slit and the lead-in side slit formed in the outer peripheral wall 35 of the lower insulating frame 25, and a portion is disposed on the outer peripheral side of the outer peripheral wall 35. Furthermore, in each of the three phases, at least two of the four slits—the lead-out side slit of the first jumper wire, the lead-in side slit of the first jumper wire, the lead-out side slit of the second jumper wire, and the lead-in side slit of the second jumper wire—have the same depth.

[0113] By making at least two types of gaps the same depth, four types of gaps are formed by three or fewer gaps of different depths. The motor 5 of Embodiment 1 does not require that the four gaps for maintaining the jumper wires have different depths, which can ensure the insulation distance between the jumper wires, while reducing the axial height of the outer peripheral wall portion 35, which enables the motor 5 to be miniaturized while ensuring insulation.

[0114] Furthermore, in Embodiment 1, the portion of the jumper wire disposed on the outer peripheral side of the outer peripheral wall portion 35 of the lower insulating frame 25 is positioned axially by contacting the bottom of the gap. Even when the groove for fitting the jumper wire is not formed on the outer peripheral surface of the outer peripheral wall portion 35, the jumper wire of Embodiment 1 can still be disposed in a predetermined area on the outer peripheral surface of the outer peripheral wall portion 35.

[0115] Furthermore, in Embodiment 1, the rotor 21 of the motor 5 is designed to accommodate a stator 22 with twelve poles of coils having one coil of the same phase arranged every three circumferentially, and therefore has eight poles. In Embodiment 1, each pole has one permanent magnet 39, and the entire rotor 21 has eight permanent magnets 39. Additionally, although not shown, a pole can also have multiple permanent magnets 39; for example, two permanent magnets 39 can be arranged in a V-shape to form a pole.

[0116] Furthermore, the conductors of the four U-phase windings 24-U1 to 24-U4 of the motor 5 forming Embodiment 1 have a first U-phase series connection portion 45-U1 and a second U-phase series connection portion 45-U2. In the first U-phase series connection portion 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the second U-phase winding 24-U2. In the second U-phase series connection portion 45-U2, the third U-phase winding 24-U3 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection portion 45-U1 and the second U-phase series connection portion 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. In Example 1, the motor 5 is connected in such a way that each phase has two jumpers.

[0117] In addition, in Embodiment 1, one end of the winding of the motor 5 that is not connected to the jumper wire is connected to either the power line or the neutral line, so that the series connection is not formed by more than three windings.

[0118] Furthermore, in the motor 5 of Embodiment 1, the combination of the depths of the four gaps is common to each of the three phases. According to the motor 5 of Embodiment 1, in the winding process performed by an automatic winding machine that performs pre-specified actions, since the combination of the depths of the four gaps is common to the three phases, it is not necessary to change the action for each phase, thus simplifying the winding process.

[0119] In addition, in the motor 5 of Embodiment 1, when the first U-phase winding 24-U1, the second U-phase winding 24-U2, the third U-phase winding 24-U3, and the fourth U-phase winding 24-U4 of the four U-phase windings 24-U1 to 24-U4 are arranged in the circumferential direction in this order, one of the two U-phase jumpers 42-U1 to 42-U2, namely the first U-phase jumper 42-U1, connects the first U-phase winding 24-U1 to the second U-phase winding 24-U2, and the other U-phase jumper 42-U1 to 42-U2, namely the second U-phase jumper 42-U2, connects the third U-phase winding 24-U3 to the fourth U-phase winding 24-U4. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same way as the four U-phase windings 24-U1 to 24-U4. That is, the multiple windings 24 of the motor 5 in Embodiment 1 are connected in adjacent poles.

[0120] Furthermore, in Embodiment 1, the motor 5 is configured such that the shapes of the four V-phase gaps 48-V1 to 48-V4 are identical to the shapes of the four U-phase gaps 48-U1 to 48-U4, and the shapes of the four W-phase gaps 48-W1 to 48-W4 are identical to the shapes of the four U-phase gaps 48-U1 to 48-U4. That is, the multiple gaps 48 are configured such that when the outer peripheral wall portion 35 of the lower insulating frame 25 virtually rotates around the rotation axis 16, the four U-phase gaps 48-U1 to 48-U4 after rotation are identical to the four V-phase gaps 48-V1 to 48-V4 or the four W-phase gaps 48-W1 to 48-W4 before rotation. The motor 5 of Embodiment 1 can form multiple windings 24 corresponding to each of the three phases by using three wires supplied by three lead outlets that are synchronously linked in the automatic winding machine.

[0121] Furthermore, in Embodiment 1, the motor 5 is configured such that when the outer peripheral wall portion 35 of the lower insulating frame 25 is virtually rotated 120 degrees circumferentially around the rotation axis 16, the four U-phase gaps 48-U1 to 48-U4 coincide with the four V-phase gaps 48-V1 to 48-V4. The motor 5 in Embodiment 1 is also configured such that when the outer peripheral wall portion 35 of the lower insulating frame 25 is virtually rotated 240 degrees circumferentially around the rotation axis 16, the four U-phase gaps 48-U1 to 48-U4 coincide with the four W-phase gaps 48-W1 to 48-W4. In this case, the motor 5 in Embodiment 1 can accommodate two different depths for the four U-phase gaps 48-U1 to 48-U4.

[0122] Furthermore, in the motor 5 of Embodiment 1, the depth of two of the four U-phase gaps 48-U1 to 48-U4 is a first depth d1, and the depth of the other two U-phase gaps is a second depth d2, which is shallower than the first depth d1. The four V-phase gaps 48-V1 to 48-V4 and the four W-phase gaps 48-W1 to 48-W4 are also formed in the same manner as the four U-phase gaps 48-U1 to 48-U4. In this way, the motor 5 of Embodiment 1 can ensure the insulation distance between the jumper wires of different phases, while maintaining two different gap depths to reduce the axial height of the outer peripheral wall portion 35 of the lower insulation frame 25. This allows for the miniaturization of the motor 5 while ensuring insulation performance.

[0123] Furthermore, in the motor 5 of Embodiment 1, the depths of the first U-phase lead-out side gap 48-U1 and the first U-phase lead-in side gap 48-U2 among the four U-phase gaps 48-U1~48-U4 are both a first depth d1, and the depths of the second U-phase lead-out side gap 48-U3 and the second U-phase lead-in side gap 48-U4 are both a second depth d2, shallower than the first depth d1. The four V-phase gaps 48-V1~48-V4 and the four W-phase gaps 48-W1~48-W4 are also formed in the same manner as the four U-phase gaps 48-U1~48-U4. In this case, in the motor 5 of Embodiment 1, when the spacing between the three-phase gaps is 120 degrees in adjacent pole connections, the types of gap depths can be reduced to two, while ensuring insulation distance and preventing the overlap of crossover wires between different phases.

[0124] Furthermore, in Embodiment 1, the outer peripheral surface of the outer peripheral wall portion 35 of the lower insulating frame 25 of the motor 5 is provided with a plurality of retaining edges 49. In this case, the motor 5 of Embodiment 1 can restrict the axial movement of the jumper wire.

[0125] Example 2 like Figure 9 As shown, the wiring combination of each winding of the multiple windings 24 of the motor in Embodiment 2 is different from that of the motor 5 in Embodiment 1. Figure 9 This is a wiring diagram showing the connection status of the multiple windings 24 of the motor in Embodiment 2. Specifically, in the first U-phase series connection section 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the third U-phase winding 24-U3. In the second U-phase series connection section 45-U2, the second U-phase winding 24-U2 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection section 45-U1 and the second U-phase series connection section 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4.

[0126] That is, such as Figure 10 As shown, multiple windings 24 are arranged circumferentially in a manner where multiple windings 24 are connected at intervals. Figure 10 This is an unfolded view of the stator 22 of the motor in Embodiment 2. Specifically, the plurality of windings 24 are arranged such that, circumferentially between two windings connected in series, a winding of the same phase as those two windings is disposed. For example, the four U-phase windings 24-U1 to 24-U4 are arranged such that, circumferentially between the first U-phase winding 24-U1 constituting the first U-phase series connection 45-U1 and the third U-phase winding 24-U3, a winding of the same phase, namely the second U-phase winding 24-U2, is disposed.

[0127] Furthermore, in the motor of Embodiment 2, the lower insulating frame 25 of the motor 5 of Embodiment 1 is replaced with another lower insulating frame 51. The lower insulating frame 51, like the lower insulating frame 25 described above, has multiple insulating frame teeth 36-1 to 36-12, while the outer peripheral wall portion 35 of the lower insulating frame 25 is replaced with another outer peripheral wall portion 52. Multiple slots 54 are formed in the outer peripheral wall portion 52, extending from the lower end of the outer peripheral wall portion 52 toward the stator core 23. The multiple slots 54 include four U-phase slots 54-U1 to 54-U4, four V-phase slots 54-V1 to 54-V4, and four W-phase slots 54-W1 to 54-W4.

[0128] The four U-phase slots 54-U1 to 54-U4 include: a first U-phase lead-out side slot 54-U1, a first U-phase lead-in side slot 54-U2, a second U-phase lead-out side slot 54-U3, and a second U-phase lead-in side slot 54-U4. The first U-phase lead-out side slot 54-U1 is formed on the reverse guiding side of the first stator core tooth portion 32-1 in the outer peripheral wall portion 52, and its depth is equal to a first depth d1. The first U-phase lead-in side slot 54-U2 is formed on the reverse guiding side of the seventh stator core tooth portion 32-7 in the outer peripheral wall portion 52, and its depth is equal to a second depth d2. The second depth d2 is shallower than the first depth d1. The second U-phase lead-out side gap 54-U3 is formed on the reverse guide side of the fourth stator core tooth portion 32-4 in the outer peripheral wall portion 52, and its depth is equal to the second depth d2. The second U-phase lead-out side gap 54-U4 is formed on the reverse guide side of the tenth stator core tooth portion 32-10 in the outer peripheral wall portion 52, and its depth is equal to the third depth d3. The third depth d3 is shallower than the second depth d2.

[0129] The four V-phase slots 54-V1 to 54-V4 include: a first V-phase lead-out side slot 54-V1, a first V-phase lead-in side slot 54-V2, a second V-phase lead-out side slot 54-V3, and a second V-phase lead-in side slot 54-V4. The first V-phase lead-out side slot 54-V1 is formed on the reverse guiding side of the fifth stator core tooth 32-5 in the outer peripheral wall portion 52, and its depth is equal to a first depth d1. The first V-phase lead-in side slot 54-V2 is formed on the reverse guiding side of the eleventh stator core tooth 32-11 in the outer peripheral wall portion 52, and its depth is equal to a second depth d2. The second V-phase lead-out side gap 54-V3 is formed on the reverse guide side of the eighth stator core tooth portion 32-8 in the outer peripheral wall portion 52, and the depth of the second V-phase lead-out side gap 54-V3 is equal to the second depth d2. The second V-phase lead-in side gap 54-V4 is formed on the reverse guide side of the second stator core tooth portion 32-2 in the outer peripheral wall portion 52, and the depth of the second V-phase lead-in side gap 54-V4 is equal to the third depth d3.

[0130] The four W-phase slots 54-W1 to 54-W4 include: a first W-phase lead-out side slot 54-W1, a first W-phase lead-in side slot 54-W2, a second W-phase lead-out side slot 54-W3, and a second W-phase lead-in side slot 54-W4. The first W-phase lead-out side slot 54-W1 is formed on the reverse guiding side of the ninth stator core tooth 32-9 in the outer peripheral wall portion 52, and its depth is equal to a first depth d1. The first W-phase lead-in side slot 54-W2 is formed on the reverse guiding side of the third stator core tooth 32-3 in the outer peripheral wall portion 52, and its depth is equal to a second depth d2. The second W-phase lead-out side gap 54-W3 is formed on the reverse guide side of the twelfth stator core tooth 32-12 in the outer peripheral wall portion 52, and the depth of the second W-phase lead-out side gap 54-W3 is equal to the second depth d2. The second W-phase lead-in side gap 54-W4 is formed on the reverse guide side of the sixth stator core tooth 32-6 in the outer peripheral wall portion 52, and the depth of the second W-phase lead-in side gap 54-W4 is equal to the third depth d3.

[0131] That is, the four V-phase gaps 54-V1 to 54-V4 are formed in the same manner as the four U-phase gaps 54-U1 to 54-U4. Furthermore, the lower insulating frame 25 is configured such that, after rotating the lower insulating frame 25 120 degrees around the rotation axis 16, the four U-phase gaps 54-U1 to 54-U4 of the rotated lower insulating frame 25 coincide with the four V-phase gaps 54-V1 to 54-V4 of the lower insulating frame 25 before rotation. Further, the four W-phase gaps 54-W1 to 54-W4 are formed in the same manner as the four U-phase gaps 54-U1 to 54-U4. In addition, the lower insulating frame 25 is configured such that after the lower insulating frame 25 is rotated 240 (=120+120) degrees around the rotating axis 16, the four U-phase gaps 54-U1~54-U4 of the rotated lower insulating frame 25 coincide with the four W-phase gaps 54-W1~54-W4 of the lower insulating frame 25 before rotation.

[0132] The first U-phase jumper wire 42-U1 passes through the first U-phase lead-out side slot 54-U1 and the first U-phase lead-in side slot 54-U2 such that a portion of the first U-phase jumper wire 42-U1 is disposed on the outer side of the outer peripheral wall portion 52. Furthermore, the first U-phase jumper wire 42-U1 contacts the bottom of the first U-phase lead-out side slot 54-U1 and the bottom of the first U-phase lead-in side slot 54-U2. Furthermore, the first U-phase jumper wire 42-U1 is disposed along the outer peripheral surface of the outer peripheral wall portion 52 in a non-flexible manner, with the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 52. Therefore, the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 52 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 52.

[0133] The second U-phase jumper wire 42-U2 passes through the second U-phase lead-out side slot 54-U3 and the second U-phase lead-in side slot 54-U4 such that a portion of the second U-phase jumper wire 42-U2 is disposed on the outer side of the outer peripheral wall portion 52. Furthermore, the second U-phase jumper wire 42-U2 contacts the bottom of the second U-phase lead-out side slot 54-U3 and the bottom of the second U-phase lead-in side slot 54-U4. Furthermore, the second U-phase jumper wire 42-U2 is disposed along the outer peripheral surface of the outer peripheral wall portion 52 in a non-flexible manner, with the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 52. Therefore, the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 52 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 52.

[0134] The first V-phase jumper wire 42-V1 passes through the first V-phase lead-out side slot 54-V1 and the first V-phase lead-in side slot 54-V2 such that a portion of the first V-phase jumper wire 42-V1 is disposed on the outer side of the outer peripheral wall portion 52. Furthermore, the first V-phase jumper wire 42-V1 contacts the bottom of the first V-phase lead-out side slot 54-V1 and the bottom of the first V-phase lead-in side slot 54-V2. Furthermore, the first V-phase jumper wire 42-V1 is disposed along the outer peripheral surface of the outer peripheral wall portion 52 in a non-flexible manner, with the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 52. Therefore, the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 52 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 52.

[0135] The second V-phase jumper wire 42-V2 passes through the second V-phase lead-out side slot 54-V3 and the second V-phase lead-in side slot 54-V4 such that a portion of the second V-phase jumper wire 42-V2 is disposed on the outer side of the outer peripheral wall portion 52. Furthermore, the second V-phase jumper wire 42-V2 contacts the bottom of the second V-phase lead-out side slot 54-V3 and the bottom of the second V-phase lead-in side slot 54-V4. Furthermore, the second V-phase jumper wire 42-V2 is disposed along the outer peripheral surface of the outer peripheral wall portion 52 in a non-flexible manner, with the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 52. Therefore, the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 52 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 52.

[0136] The first W-phase jumper wire 42-W1 passes through the first W-phase lead-out side slot 54-W1 and the first W-phase lead-in side slot 54-W2 such that a portion of the first W-phase jumper wire 42-W1 is disposed on the outer side of the outer peripheral wall portion 52. Furthermore, the first W-phase jumper wire 42-W1 contacts the bottom of the first W-phase lead-out side slot 54-W1 and the bottom of the first W-phase lead-in side slot 54-W2. Furthermore, the first W-phase jumper wire 42-W1 is disposed along the outer peripheral surface of the outer peripheral wall portion 52 in a non-flexible manner, with the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 52. Therefore, the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 52 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 52.

[0137] The second W-phase jumper wire 42-W2 passes through the second W-phase lead-out side slot 54-W3 and the second W-phase lead-in side slot 54-W4 such that a portion of the second W-phase jumper wire 42-W2 is disposed on the outer side of the outer peripheral wall portion 52. Furthermore, the second W-phase jumper wire 42-W2 contacts the bottom of the second W-phase lead-out side slot 54-W3 and the bottom of the second W-phase lead-in side slot 54-W4. Furthermore, the second W-phase jumper wire 42-W2 is disposed along the outer peripheral surface of the outer peripheral wall portion 52 in a non-flexible manner, with the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 52. Therefore, the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 52 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 52.

[0138] The lower insulating frame 25 also includes a plurality of retaining edges 55 corresponding to the plurality of jumper wires 42. Each of the plurality of retaining edges 55 protrudes outward from the outer peripheral surface of the outer peripheral wall portion 52. The retaining edge 55 corresponding to a particular jumper wire is positioned on the reverse guiding side of the portion of that jumper wire located on the outer side of the outer peripheral wall portion 52 and contacts that portion. Therefore, the stator 22 can prevent the portion of the plurality of jumper wires 42 located on the outer side of the outer peripheral wall portion 52 from shifting from a predetermined area in the outer peripheral surface of the outer peripheral wall portion 52 towards the reverse guiding side.

[0139] In stator 22, for the U phase, there are two U-phase jumpers 42-U1 to 42-U2. One of the U-phase jumpers 42-U1 to 42-U2, namely the first U-phase jumper 42-U1, connects the first U-phase winding 24-U1 to the third U-phase winding 24-U3 of the four U-phase windings 24-U1 to 24-U4. The other U-phase jumper 42-U2 connects the second U-phase winding 24-U2 to the fourth U-phase winding 24-U4. In stator 22, for both the U phase and V phase, similarly to the U phase, each phase has two jumpers.

[0140] The outer peripheral wall 35 of the lower insulating frame 25 has a plurality of slits 54. A jumper wire connecting to the winding end point of the winding is led out from a plurality of lead-out side slits among the plurality of slits 54. A jumper wire connecting to the winding start point of the winding is introduced from a plurality of lead-in side slits among the plurality of slits 54. Each of the plurality of jumper wires 42 passes through both the lead-out side slit and the lead-in side slit formed in the outer peripheral wall 35 of the lower insulating frame 25, and a portion is disposed on the outer peripheral side of the outer peripheral wall 35. Furthermore, in each of the three phases, at least two of the four slits—the lead-out side slit of the first jumper wire, the lead-in side slit of the first jumper wire, the lead-out side slit of the second jumper wire, and the lead-in side slit of the second jumper wire—have the same depth.

[0141] By making at least two types of gaps the same depth, four types of gaps are formed by three or fewer gaps of different depths. The motor 5 of Embodiment 2 does not require that the four gaps for maintaining the jumper wires have different depths, which can ensure the insulation distance between the jumper wires, while reducing the axial height of the outer peripheral wall portion 35, which enables the motor 5 to be miniaturized while ensuring insulation.

[0142] Furthermore, the conductors of the four U-phase windings 24-U1 to 24-U4 of the motor 5 forming Embodiment 2 have a first U-phase series connection portion 45-U1 and a second U-phase series connection portion 45-U2. In the first U-phase series connection portion 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the third U-phase winding 24-U3. In the second U-phase series connection portion 45-U2, the second U-phase winding 24-U2 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection portion 45-U1 and the second U-phase series connection portion 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. In Example 2, the motor 5 is connected in such a way that the jumpers for each phase become two.

[0143] In addition, in the motor 5 of Embodiment 2, when the first U-phase winding 24-U1, the second U-phase winding 24-U2, the third U-phase winding 24-U3, and the fourth U-phase winding 24-U4 of the four U-phase windings 24-U1 to 24-U4 are arranged in the circumferential direction in this order, one of the two U-phase jumpers 42-U1 to 42-U2, namely the first U-phase jumper 42-U1, connects the first U-phase winding 24-U1 to the third U-phase winding 24-U3, and the other U-phase jumper 42-U1 to 42-U2, namely the second U-phase jumper 42-U2, connects the second U-phase winding 24-U2 to the fourth U-phase winding 24-U4. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same way as the four U-phase windings 24-U1 to 24-U4. That is, the multiple windings 24 of the motor 5 in Embodiment 1 are connected with poles separated.

[0144] Furthermore, in Embodiment 2, the motor 5 is configured such that when the outer peripheral wall portion 35 of the lower insulating frame 25 is virtually rotated 120 degrees circumferentially around the rotation axis 16, the four U-phase gaps 54-U1 to 54-U4 coincide with the four V-phase gaps 54-V1 to 54-V4. In Embodiment 1, the motor 5 is further configured such that when the outer peripheral wall portion 35 of the lower insulating frame 25 is virtually rotated 240 degrees circumferentially around the rotation axis 16, the four U-phase gaps 54-U1 to 54-U4 coincide with the four W-phase gaps 54-W1 to 54-W4. In this case, the motor 5 of Embodiment 2 can accommodate three different depths for the four U-phase gaps 54-U1 to 54-U4.

[0145] Furthermore, in the motor 5 of Embodiment 2, the depths of two of the four U-phase gaps 54-U1 to 54-U4 (54-U2, 54-U3) are all the same depth (second depth d2). The four V-phase gaps 54-V1 to 54-V4 and the four W-phase gaps 54-W1 to 54-W4 are also formed in the same manner as the four U-phase gaps 54-U1 to 54-U4. In this way, the motor 5 of Embodiment 2 can ensure the insulation distance between the jumper wires of different phases, while maintaining three different gap depths to reduce the axial height of the outer peripheral wall portion 35 of the lower insulation frame 25. This allows for miniaturization of the motor 5 while ensuring insulation performance.

[0146] Furthermore, in the motor 5 of Embodiment 2, the depth of the second U-phase lead-out side gap 54-U3 among the four U-phase gaps 54-U1~54-U4 is the same as the depth of the first U-phase lead-in side gap 54-U2 (second depth d2). The four V-phase gaps 54-V1~54-V4 and the four W-phase gaps 54-W1~54-W4 are also formed in the same manner as the four U-phase gaps 54-U1~54-U4. In this case, in the motor 5 of Embodiment 2, when the spacing between the three-phase gaps is 120 degrees in the pole-separated connection, the number of gap depth types can be reduced to three, while ensuring insulation distance and preventing the overlap of crossover wires between different phases.

[0147] The motor of Embodiment 2, formed as described above, ensures insulation between the plurality of jumper wires 42, similar to the motor 5 of Embodiment 1. Furthermore, the motor of Embodiment 2, by forming a plurality of gaps 54 from three types of gaps—a plurality of gaps at a first depth d1, a plurality of gaps at a second depth d2, and a plurality of gaps at a third depth d3—can reduce the axial height of the outer peripheral wall portion 52. Because the outer peripheral wall portion 52 of the motor of Embodiment 2 has a smaller height, its axial height can be reduced. Since the motor of Embodiment 2 has a smaller height, the compressor equipped with the motor of Embodiment 2 can also have a reduced axial height.

[0148] Example 3 like Figure 11 As shown, the wiring combination of each winding of the multiple windings 24 of the motor in Embodiment 3 is different from that of the motor 5 in Embodiment 1. Figure 11 This is a wiring diagram showing the wiring configuration of the multiple windings 24 of the motor in Embodiment 3. Specifically, in the first U-phase series connection section 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the second U-phase winding 24-U2. In the second U-phase series connection section 45-U2, the third U-phase winding 24-U3 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection section 45-U1 and the second U-phase series connection section 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. That is, as... Figure 12 As shown, multiple windings 24 are arranged circumferentially in a manner where multiple windings 24 are connected to adjacent poles. Figure 12 This is an unfolded view of the stator 22 of the electric motor in Embodiment 3.

[0149] The first U-phase power line 44-U1 and the second U-phase power line 44-U2 are described later. Figure 12 As shown, the wire is wound while remaining connected during the winding process, and after the winding process, as... Figure 11 As shown, the first U-phase power line 44-U1 and the second U-phase power line 44-U2 are cut apart, and the two ends of the cut are connected to the U-phase power supply respectively. The first V-phase power line 44-V1 and the second V-phase power line 44-V2 are wound together while remaining connected during the winding process, and after the winding process, as shown... Figure 11 As shown, the first V-phase power line 44-V1 and the second V-phase power line 44-V2 are cut apart, and the two ends of the cut are connected to the V-phase power supply respectively. The first W-phase power line 44-W1 and the second W-phase power line 44-W2 are wound together while remaining connected during the winding process, and after the winding process, as shown... Figure 11 As shown, the first W-phase power line 44-W1 and the second W-phase power line 44-W2 are cut apart, and the two cut ends are respectively connected to the W-phase power supply.

[0150] The stator of the motor in Embodiment 3 further includes a U-connection connection 60-U, a V-connection connection 60-V, and a W-connection connection 60-W. The second U-phase winding 24-U2 is connected to the first U-phase power supply line 44-U1 via the U-connection connection 60-U. The second V-phase winding 24-V2 is connected to the first V-phase power supply line 44-V1 via the V-connection connection 60-V. The second W-phase winding 24-W2 is connected to the first W-phase power supply line 44-W1 via the W-connection connection 60-W.

[0151] Furthermore, such as Figure 12 As shown, in the motor of Embodiment 3, the lower insulating frame 25 of the motor 5 of Embodiment 1 is replaced with another lower insulating frame 61. The lower insulating frame 61, like the lower insulating frame 25, has multiple insulating frame teeth 36-1 to 36-12, while the outer peripheral wall portion 35 of the lower insulating frame 25 is replaced with another outer peripheral wall portion 62. Multiple slots 64 are formed in the outer peripheral wall portion 62, extending from the lower end of the outer peripheral wall portion 62 opposite to the stator core 23 toward the stator core 23. The multiple slots 64 include six U-phase slots 64-U1 to 64-U6, six V-phase slots 64-V1 to 64-V6, and six W-phase slots 64-W1 to 64-W6.

[0152] The six U-phase slots 64-U1 to 64-U6 include: a first U-phase lead-out side slot 64-U1, a first U-phase lead-in side slot 64-U2, a second U-phase lead-out side slot 64-U3, a second U-phase lead-in side slot 64-U4, a U-connector lead-out side slot 64-U5, and a U-connector lead-in side slot 64-U6. The first U-phase lead-out side slot 64-U1 is formed on the reverse guiding side of the first stator core tooth portion 32-1 in the outer peripheral wall portion 62, and its depth is equal to a first depth d1. The first U-phase lead-in side slot 64-U2 is formed on the reverse guiding side of the fourth stator core tooth portion 32-4 in the outer peripheral wall portion 62, and its depth is equal to the first depth d1. The second U-phase lead-out side gap 64-U3 is formed on the reverse guiding side of the seventh stator core tooth 32-7 in the outer peripheral wall portion 62, and its depth is equal to the second depth d2. The second depth d2 is shallower than the first depth d1. The second U-phase lead-in side gap 64-U4 is formed on the reverse guiding side of the tenth stator core tooth 32-10 in the outer peripheral wall portion 62, and its depth is equal to the second depth d2. The U-connection wire lead-out side gap 64-U5 is formed on the reverse guiding side of the fourth stator core tooth 32-4 in the outer peripheral wall portion 62, and its depth is equal to the third depth d3. In embodiment 3, the third depth d3 is shallower than the first depth d1 and deeper than the second depth d2. The U-connection wire introduction side gap 64-U6 is formed on the reverse guide side of the seventh stator core tooth 32-7 in the outer peripheral wall portion 62, and the depth of the U-connection wire introduction side gap 64-U6 is equal to the third depth d3.

[0153] The six V-phase slots 64-V1 to 64-V6 include: a first V-phase lead-out side slot 64-V1, a first V-phase lead-in side slot 64-V2, a second V-phase lead-out side slot 64-V3, a second V-phase lead-in side slot 64-V4, a V-connector lead-out side slot 64-V5, and a V-connector lead-in side slot 64-V6. The first V-phase lead-out side slot 64-V1 is formed on the reverse guiding side of the fifth stator core tooth 32-5 in the outer peripheral wall portion 62, and its depth is equal to a first depth d1. The first V-phase lead-in side slot 64-V2 is formed on the reverse guiding side of the eighth stator core tooth 32-8 in the outer peripheral wall portion 62, and its depth is equal to the first depth d1. The second V-phase lead-out side gap 64-V3 is formed on the reverse guiding side of the eleventh stator core tooth 32-11 in the outer peripheral wall portion 62, and its depth is equal to the second depth d2. The second V-phase lead-in side gap 64-V4 is formed on the reverse guiding side of the second stator core tooth 32-2 in the outer peripheral wall portion 62, and its depth is equal to the second depth d2. The V-connection wire lead-out side gap 64-V5 is formed on the reverse guiding side of the eighth stator core tooth 32-8 in the outer peripheral wall portion 62, and its depth is equal to the third depth d3. The V-connection wire lead-out side gap 64-V6 is formed on the reverse guide side of the eleventh stator core tooth portion 32-11 in the outer peripheral wall portion 62, and the depth of the V-connection wire lead-out side gap 64-V6 is equal to the third depth d3.

[0154] The six W-phase slots 64-W1 to 64-W6 include: a first W-phase lead-out side slot 64-W1, a first W-phase lead-in side slot 64-W2, a second W-phase lead-out side slot 64-W3, a second W-phase lead-in side slot 64-W4, a W-connector lead-out side slot 64-W5, and a W-connector lead-in side slot 64-W6. The first W-phase lead-out side slot 64-W1 is formed on the reverse guiding side of the ninth stator core tooth 32-9 in the outer peripheral wall portion 62, and its depth is equal to a first depth d1. The first W-phase lead-in side slot 64-W2 is formed on the reverse guiding side of the twelfth stator core tooth 32-12 in the outer peripheral wall portion 62, and its depth is equal to the first depth d1. The second W-phase lead-out side gap 64-W3 is formed on the reverse guiding side of the third stator core tooth 32-3 in the outer peripheral wall portion 62, and its depth is equal to the second depth d2. The second W-phase lead-out side gap 64-W4 is formed on the reverse guiding side of the sixth stator core tooth 32-6 in the outer peripheral wall portion 62, and its depth is equal to the second depth d2. The W-connection wire lead-out side gap 64-W5 is formed on the reverse guiding side of the twelfth stator core tooth 32-12 in the outer peripheral wall portion 62, and its depth is equal to the third depth d3. The W-connection wire introduction side gap 64-W6 is formed on the reverse guide side of the third stator core tooth 32-3 in the outer peripheral wall portion 62, and the depth of the W-connection wire introduction side gap 64-W6 is equal to the third depth d3.

[0155] That is, the six V-phase gaps 64-V1 to 64-V6 are formed in the same manner as the six U-phase gaps 64-U1 to 64-U6. Furthermore, the lower insulating frame 25 is configured such that, after rotating the lower insulating frame 25 120 degrees around the rotation axis 16, the six U-phase gaps 64-U1 to 64-U6 of the rotated lower insulating frame 25 coincide with the six V-phase gaps 64-V1 to 64-V6 of the lower insulating frame 25 before rotation. Further, the six W-phase gaps 64-W1 to 64-W6 are formed in the same manner as the six U-phase gaps 64-U1 to 64-U6. In addition, the lower insulating frame 25 is configured such that after the lower insulating frame 25 is rotated 240 (=120+120) degrees around the rotation axis 16, the six U-phase gaps 64-U1~64-U6 of the rotated lower insulating frame 25 coincide with the six W-phase gaps 64-W1~64-W6 of the lower insulating frame 25 before rotation.

[0156] The first U-phase jumper wire 42-U1 passes through the first U-phase lead-out side slot 64-U1 and the first U-phase lead-in side slot 64-U2 such that a portion of the first U-phase jumper wire 42-U1 is disposed on the outer side of the outer peripheral wall portion 62. Furthermore, the first U-phase jumper wire 42-U1 contacts the bottom of the first U-phase lead-out side slot 64-U1 and the bottom of the first U-phase lead-in side slot 64-U2. Furthermore, the first U-phase jumper wire 42-U1 is disposed along the outer peripheral surface of the outer peripheral wall portion 62 in a non-flexible manner, with the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0157] The second U-phase jumper wire 42-U2 passes through the second U-phase lead-out side slot 64-U3 and the second U-phase lead-in side slot 64-U4 such that a portion of the second U-phase jumper wire 42-U2 is disposed on the outer side of the outer peripheral wall portion 62. Furthermore, the second U-phase jumper wire 42-U2 contacts the bottom of the second U-phase lead-out side slot 64-U3 and the bottom of the second U-phase lead-in side slot 64-U4. Furthermore, the second U-phase jumper wire 42-U2 is disposed along the outer peripheral surface of the outer peripheral wall portion 62 in a non-flexible manner, with the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0158] The U-connecting wire 60-U is positioned such that a portion of the U-connecting wire 60-U is disposed on the outer side of the outer peripheral wall portion 62, passing through the U-connecting wire lead-out side slot 64-U5 and the U-connecting wire lead-in side slot 64-U6. Furthermore, the U-connecting wire 60-U contacts the bottom of the U-connecting wire lead-out side slot 64-U5 and the bottom of the U-connecting wire lead-in side slot 64-U6. Furthermore, the U-connecting wire 60-U is positioned such that a portion of the U-connecting wire 60-U disposed on the outer side of the outer peripheral wall portion 62 is not bent, and is arranged along the outer peripheral surface of the outer peripheral wall portion 62. Therefore, a portion of the U-connecting wire 60-U disposed on the outer side of the outer peripheral wall portion 62 is arranged along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0159] The first V-phase jumper wire 42-V1 passes through the first V-phase lead-out side slot 64-V1 and the first V-phase lead-in side slot 64-V2 such that a portion of the first V-phase jumper wire 42-V1 is disposed on the outer side of the outer peripheral wall portion 62. Furthermore, the first V-phase jumper wire 42-V1 contacts the bottom of the first V-phase lead-out side slot 64-V1 and the bottom of the first V-phase lead-in side slot 64-V2. Furthermore, the first V-phase jumper wire 42-V1 is disposed along the outer peripheral surface of the outer peripheral wall portion 62 in a non-flexible manner, with the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0160] The second V-phase jumper wire 42-V2 passes through the second V-phase lead-out side slot 64-V3 and the second V-phase lead-in side slot 64-V4 such that a portion of the second V-phase jumper wire 42-V2 is disposed on the outer side of the outer peripheral wall portion 62. Furthermore, the second V-phase jumper wire 42-V2 contacts the bottom of the second V-phase lead-out side slot 64-V3 and the bottom of the second V-phase lead-in side slot 64-V4. Furthermore, the second V-phase jumper wire 42-V2 is disposed along the outer peripheral surface of the outer peripheral wall portion 62 in a non-flexible manner, with the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0161] The V-connector 60-V passes through the V-connector lead-out side slot 64-V5 and the V-connector lead-in side slot 64-V6 such that a portion of the V-connector 60-V is disposed on the outer side of the outer peripheral wall portion 62. Furthermore, the V-connector 60-V contacts the bottom of the V-connector lead-out side slot 64-V5 and the bottom of the V-connector lead-in side slot 64-V6. Furthermore, the V-connector 60-V is disposed along the outer peripheral surface of the outer peripheral wall portion 62 without bending the portion disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the V-connector 60-V disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0162] The first W-phase jumper wire 42-W1 passes through the first W-phase lead-out side slot 64-W1 and the first W-phase lead-in side slot 64-W2 such that a portion of the first W-phase jumper wire 42-W1 is disposed on the outer side of the outer peripheral wall portion 62. Furthermore, the first W-phase jumper wire 42-W1 contacts the bottom of the first W-phase lead-out side slot 64-W1 and the bottom of the first W-phase lead-in side slot 64-W2. Furthermore, the first W-phase jumper wire 42-W1 is disposed along the outer peripheral surface of the outer peripheral wall portion 62 in a non-flexible manner, with the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0163] The second W-phase jumper wire 42-W2 passes through the second W-phase lead-out side slot 64-W3 and the second W-phase lead-in side slot 64-W4 such that a portion of the second W-phase jumper wire 42-W2 is disposed on the outer side of the outer peripheral wall portion 62. Furthermore, the second W-phase jumper wire 42-W2 contacts the bottom of the second W-phase lead-out side slot 64-W3 and the bottom of the second W-phase lead-in side slot 64-W4. Furthermore, the second W-phase jumper wire 42-W2 is disposed along the outer peripheral surface of the outer peripheral wall portion 62 in a non-flexible manner, with the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0164] The W-connecting wire 60-W is positioned such that a portion of the W-connecting wire 60-W is disposed on the outer side of the outer peripheral wall portion 62, passing through the W-connecting wire lead-out side slot 64-W5 and the W-connecting wire lead-in side slot 64-W6. Furthermore, the W-connecting wire 60-W contacts the bottom of the W-connecting wire lead-out side slot 64-W5 and the bottom of the W-connecting wire lead-in side slot 64-W6. Furthermore, the W-connecting wire 60-W is disposed along the outer peripheral surface of the outer peripheral wall portion 62 without bending the portion disposed on the outer side of the outer peripheral wall portion 62. Therefore, the portion of the W-connecting wire 60-W disposed on the outer side of the outer peripheral wall portion 62 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 62.

[0165] The motor of Embodiment 3, formed as described above, allows the multiple jumper wires 42, U-connecting wires 60-U, V-connecting wires 60-V, and W-connecting wires 60-W to be kept away from each other, preventing them from contacting each other. Furthermore, the motor of Embodiment 3, by forming multiple gaps 64 from multiple gaps of a first depth d1, a second depth d2, and a third depth d3, reduces the axial height of the outer peripheral wall portion 62. Because the outer peripheral wall portion 62 of the motor of Embodiment 3 has a smaller height, its axial height can be reduced. Since the motor of Embodiment 3 has a smaller height, the compressor equipped with the motor of Embodiment 3 can also have a reduced axial height.

[0166] The stator of the motor in Embodiment 3 can be manufactured using an automatic winding machine in the same manner as the stator 22 of the motor 5 in Embodiment 1. Specifically, the stator core 23, equipped with a lower insulating frame 61 and an upper insulating frame 26, is first placed on the automatic winding machine with the central axis of the yoke 31 of the stator core 23 aligned with the central axis of the automatic winding machine. After one end of the U-phase conductor is positioned on the guide side of the first stator core tooth 32-1, the automatic winding machine moves the U-phase conductor through the lead-out nozzle, causing the U-phase conductor to be wound counterclockwise on the first stator core tooth 32-1, forming the first U-phase neutral line 43-U1 and the first U-phase winding 24-U1. At this time, the automatic winding machine, by linking the outlet nozzles of the V-phase conductors with those of the U-phase conductors, enables the V-phase conductors to be wound counterclockwise on the fifth stator core teeth 32-5, forming the first V-phase neutral line 43-V1 and the first V-phase winding 24-V1. The automatic winding machine also, by linking the outlet nozzles of the W-phase conductors with those of the U-phase conductors, enables the W-phase conductors to be wound counterclockwise on the ninth stator core teeth 32-9, forming the first V-phase neutral line 43-V1 and the first W-phase winding 24-W1.

[0167] Next, the automatic winding machine moves the outlet nozzle of the U-phase conductor, causing the U-phase conductor to pass through the first U-phase lead-out side gap 64-U1 and the first U-phase lead-in side gap 64-U2 of the outer peripheral wall portion 35 of the lower insulation frame 61, forming the first U-phase jumper wire 42-U1 from the U-phase conductor. At this time, the automatic winding machine, by linking the outlet nozzle of the V-phase conductor with the outlet nozzle of the U-phase conductor, enables the V-phase conductor to pass through the first V-phase lead-out side gap 64-V1 and the first V-phase lead-in side gap 64-V2 of the outer peripheral wall portion 35 of the lower insulation frame 61, forming the first V-phase jumper wire 42-V1 from the V-phase conductor. The automatic winding machine also enables the W-phase conductor to pass through the first W-phase lead-out side gap 64-W1 and the first W-phase lead-in side gap 64-W2 of the outer peripheral wall 35 of the lower insulation frame 61 by linking the lead-out nozzle of the W-phase conductor with the lead-out nozzle of the U-phase conductor, thereby forming the first W-phase jumper wire 42-W1.

[0168] Next, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor to be wound counterclockwise on the fourth stator core tooth section 32-4, forming the second U-phase winding 24-U2. At this time, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, the automatic winding machine can cause the V-phase conductor to be wound counterclockwise on the eighth stator core tooth section 32-8, forming the second V-phase winding 24-V2. The automatic winding machine also connects the W-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, causing the W-phase conductor to be wound counterclockwise on the twelfth stator core tooth section 32-12, forming the second W-phase winding 24-W2.

[0169] Next, the automatic winding machine moves the outlet nozzle of the U-phase conductor, causing the U-phase conductor to pass through the U-connector lead-out side gap 64-U5 and the U-connector lead-in side gap 64-U6 of the outer peripheral wall 35, forming a U-connector connection 60-U. At this time, the automatic winding machine, by linking the outlet nozzle of the V-phase conductor with the outlet nozzle of the U-phase conductor, enables the V-phase conductor to pass through the V-connector lead-out side gap 64-V5 and the V-connector lead-in side gap 64-V6 of the outer peripheral wall 35, forming a V-connector connection 60-V. The automatic winding machine also, by linking the outlet nozzle of the W-phase conductor with the outlet nozzle of the U-phase conductor, enables the W-phase conductor to pass through the W-connector lead-out side gap 64-W5 and the W-connector lead-in side gap 64-W6 of the outer peripheral wall 35, forming a W-connector connection 60-W.

[0170] Next, the automatic winding machine moves the outlet nozzle of the U-phase conductor, positioning a portion of the U-phase conductor on the guide side of the seventh stator core tooth section 32-7, forming the first U-phase power line 44-U1. At this time, the automatic winding machine, by linking the outlet nozzle of the V-phase conductor with the outlet nozzle of the U-phase conductor, can position a portion of the V-phase conductor on the guide side of the seventh stator core tooth section 32-7, forming the first V-phase power line 44-V1. The automatic winding machine also, by linking the outlet nozzle of the W-phase conductor with the outlet nozzle of the U-phase conductor, can position a portion of the W-phase conductor on the guide side of the seventh stator core tooth section 32-7, forming the first W-phase power line 44-W1.

[0171] Next, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor to be wound clockwise on the seventh stator core tooth section 32-7, forming the second U-phase power line 44-U2 and the third U-phase winding 24-U3. At this time, the automatic winding machine, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, enables the V-phase conductor to be wound clockwise on the eleventh stator core tooth section 32-11, forming the second V-phase power line 44-V2 and the third V-phase winding 24-V3. The automatic winding machine also, by linking the W-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, enables the W-phase conductor to be wound clockwise on the third stator core tooth section 32-3, forming the second W-phase power line 44-W2 and the third W-phase winding 24-W3.

[0172] Next, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor to pass through the second U-phase lead-out side gap 64-U3 and the second U-phase lead-in side gap 64-U4 of the outer peripheral wall portion 35 of the lower insulation frame 61, forming the second U-phase jumper wire 42-U2 from the V-phase conductor. At this time, the automatic winding machine, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, enables the V-phase conductor to pass through the second V-phase lead-out side gap 64-V3 and the second V-phase lead-in side gap 64-V4 of the outer peripheral wall portion 35 of the lower insulation frame 61, forming the second V-phase jumper wire 42-V2 from the V-phase conductor. The automatic winding machine also enables the W-phase conductor to pass through the second W-phase lead-out side gap 64-W3 and the second W-phase lead-in side gap 64-W4 on the outer peripheral wall 35 of the lower insulation frame 61 by linking the lead-out nozzle of the W-phase conductor with the lead-out nozzle of the U-phase conductor, thereby forming the second W-phase jumper wire 42-W2.

[0173] Next, the automatic winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor to be wound clockwise on the tenth stator core tooth section 32-10. The other end of the U-phase conductor is positioned on the guide side of the tenth stator core tooth section 32-10, forming the fourth U-phase winding 24-U4 and the second U-phase neutral line 43-U2. At this time, the automatic winding machine, by linking the V-phase conductor outlet nozzle with the U-phase conductor outlet nozzle, causes the V-phase conductor to be wound clockwise on the second stator core tooth section 32-2, with the other end positioned on the guide side of the second stator core tooth section 32-2. The V-phase conductor forms the fourth V-phase winding 24-V4 and the second V-phase neutral line 43-V2. The automatic winding machine also enables the W-phase conductor to be wound clockwise on the sixth stator core tooth 32-6 by linking the outlet nozzle of the W-phase conductor with the outlet nozzle of the U-phase conductor, and the other end of the W-phase conductor is positioned on the guide side of the sixth stator core tooth 32-6, forming the fourth W-phase winding 24-W4 and the second W-phase neutral line 43-W2 from the W-phase conductor.

[0174] That is, the stator of the motor in Embodiment 3, because the shapes of the six U-phase slots 64-U1~64-U6, the six V-phase slots 64-V1~64-V6, and the six W-phase slots 64-W1~64-W6 are identical, can be easily manufactured using an automatic winding machine, just like the stators of the motors in Embodiments 1 and 2. Furthermore, because the stator of the motor in Embodiment 3 has multiple windings 24 formed by three wires, fewer wires are used compared to the stators of the motors in Embodiments 1 and 2, making it easier to manufacture.

[0175] On the other hand, the outer peripheral wall portion 62 of the motor in Embodiment 3 does not have multiple retaining edges, but multiple retaining edges may be formed. These multiple retaining edges correspond to multiple jumper wires 42, U-connecting wires 60-U, V-connecting wires 60-V, and W-connecting wires 60-W. Each of the multiple retaining edges protrudes outward from the outer peripheral surface of the outer peripheral wall portion 62. The retaining edge corresponding to a certain jumper wire is positioned on the reverse guiding side of the portion of that jumper wire positioned on the outer side of the outer peripheral wall portion 62 and contacts that portion. Similarly, the retaining edge corresponding to a certain connecting wire is positioned on the reverse guiding side of the portion of that connecting wire positioned on the outer side of the outer peripheral wall portion 62 and contacts that portion. When the outer peripheral wall portion 62 of the motor in Embodiment 3 has multiple retaining edges, it can prevent the portions of the multiple jumper wires 42, U-connecting wires 60-U, V-connecting wires 60-V, and W-connecting wires 60-W positioned on the outer side of the outer peripheral wall portion 62 from shifting from a predetermined area in the outer peripheral surface of the outer peripheral wall portion 72 towards the reverse guiding side.

[0176] Example 4 like Figure 13As shown, the wiring combination of each winding of the multiple windings 24 of the motor in Embodiment 4 is different from that of the motor 5 in Embodiment 1. Figure 13 This is a wiring diagram showing the wiring configuration of the multiple windings 24 of the motor in Embodiment 4. Specifically, in the first U-phase series connection section 45-U1, the first U-phase winding 24-U1 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the second U-phase winding 24-U2. In the second U-phase series connection section 45-U2, the third U-phase winding 24-U3 of the four U-phase windings 24-U1 to 24-U4 is connected in series with the fourth U-phase winding 24-U4. The first U-phase series connection section 45-U1 and the second U-phase series connection section 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. That is, as... Figure 14 As shown, multiple windings 24 are arranged circumferentially in a manner where multiple windings 24 are connected to adjacent poles. Figure 14 This is an unfolded view of the stator 22 of the electric motor in Embodiment 4.

[0177] Furthermore, in the motor of Embodiment 4, the lower insulating frame 25 of the motor 5 of Embodiment 1 is replaced with another lower insulating frame 71. The lower insulating frame 71, like the lower insulating frame 25, has multiple insulating frame teeth 36-1 to 36-12, while the outer peripheral wall portion 35 of the lower insulating frame 25 is replaced with another outer peripheral wall portion 72. Multiple slots 74 are formed in the outer peripheral wall portion 72, extending from the lower end of the outer peripheral wall portion 72 opposite to the stator core 23 toward the stator core 23. The multiple slots 74 include four U-phase slots 74-U1 to 74-U4, four V-phase slots 74-V1 to 74-V4, and four W-phase slots 74-W1 to 74-W4.

[0178] The four U-phase slots 74-U1 to 74-U4 include: a first U-phase lead-out side slot 74-U1, a first U-phase lead-in side slot 74-U2, a second U-phase lead-out side slot 74-U3, and a second U-phase lead-in side slot 74-U4. The first U-phase lead-out side slot 74-U1 is formed on the reverse guiding side of the first stator core tooth portion 32-1 in the outer peripheral wall portion 72, and its depth is equal to a first depth d1. The first U-phase lead-in side slot 74-U2 is formed on the reverse guiding side of the fourth stator core tooth portion 32-4 in the outer peripheral wall portion 72, and its depth is equal to a second depth d2. The second depth d2 is shallower than the first depth d1. The second U-phase lead-out side gap 74-U3 is formed on the reverse guide side of the seventh stator core tooth portion 32-7 in the outer peripheral wall portion 72, and the depth of the second U-phase lead-out side gap 74-U3 is equal to the first depth d1. The second U-phase lead-in side gap 74-U4 is formed on the reverse guide side of the tenth stator core tooth portion 32-10 in the outer peripheral wall portion 72, and the depth of the second U-phase lead-in side gap 74-U4 is equal to the second depth d2.

[0179] The four V-phase slots 74-V1 to 74-V4 include: a first V-phase lead-out side slot 74-V1, a first V-phase lead-in side slot 74-V2, a second V-phase lead-out side slot 74-V3, and a second V-phase lead-in side slot 74-V4. The first V-phase lead-out side slot 74-V1 is formed on the reverse guiding side of the second stator core tooth portion 32-2 in the outer peripheral wall portion 72, and its depth is equal to a first depth d1. The first V-phase lead-in side slot 74-V2 is formed on the reverse guiding side of the fifth stator core tooth portion 32-5 in the outer peripheral wall portion 72, and its depth is equal to a second depth d2. The second V-phase lead-out side gap 74-V3 is formed on the reverse guide side of the eighth stator core tooth portion 32-8 in the outer peripheral wall portion 72, and the depth of the second V-phase lead-out side gap 74-V3 is equal to the first depth d1. The second V-phase lead-in side gap 74-V4 is formed on the reverse guide side of the eleventh stator core tooth portion 32-11 in the outer peripheral wall portion 72, and the depth of the second V-phase lead-in side gap 74-V4 is equal to the second depth d2.

[0180] The four W-phase slots 74-W1 to 74-W4 include: a first W-phase lead-out side slot 74-W1, a first W-phase lead-in side slot 74-W2, a second W-phase lead-out side slot 74-W3, and a second W-phase lead-in side slot 74-W4. The first W-phase lead-out side slot 74-W1 is formed on the reverse guiding side of the third stator core tooth portion 32-3 in the outer peripheral wall portion 72, and its depth is equal to a first depth d1. The first W-phase lead-in side slot 74-W2 is formed on the reverse guiding side of the sixth stator core tooth portion 32-6 in the outer peripheral wall portion 72, and its depth is equal to a second depth d2. The second W-phase lead-out side slot 74-W3 is formed on the reverse guide side of the ninth stator core tooth 32-9 in the outer peripheral wall portion 72, and the depth of the second W-phase lead-out side slot 74-W3 is equal to the first depth d1. The second W-phase lead-in side slot 74-W4 is formed on the reverse guide side of the twelfth stator core tooth 32-12 in the outer peripheral wall portion 72, and the depth of the second W-phase lead-in side slot 74-W4 is equal to the second depth d2.

[0181] That is, the four V-phase gaps 74-V1 to 74-V4 are formed in the same manner as the four U-phase gaps 74-U1 to 74-U4. Furthermore, the lower insulating frame 71 is configured such that, after rotating the lower insulating frame 71 30 degrees around the rotation axis 16, the four U-phase gaps 74-U1 to 74-U4 of the rotated lower insulating frame 71 coincide with the four V-phase gaps 74-V1 to 74-V4 of the lower insulating frame 71 before rotation. Further, the four W-phase gaps 74-W1 to 74-W4 are formed in the same manner as the four U-phase gaps 74-U1 to 74-U4. In addition, the lower insulating frame 71 is configured such that after the lower insulating frame 71 is rotated 60 (=30+30) degrees around the rotation axis 16, the four U-phase gaps 74-U1~74-U4 of the rotated lower insulating frame 71 coincide with the four W-phase gaps 74-W1~74-W4 of the lower insulating frame 71 before rotation.

[0182] The first U-phase jumper wire 42-U1 passes through the first U-phase lead-out side slot 74-U1 and the first U-phase lead-in side slot 74-U2 such that a portion of the first U-phase jumper wire 42-U1 is disposed on the outer side of the outer peripheral wall portion 72. Furthermore, the first U-phase jumper wire 42-U1 contacts the bottom of the first U-phase lead-out side slot 74-U1 and the bottom of the first U-phase lead-in side slot 74-U2. Furthermore, the first U-phase jumper wire 42-U1 is disposed along the outer peripheral surface of the outer peripheral wall portion 72 in a non-flexible manner, with the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 72. Therefore, the portion of the first U-phase jumper wire 42-U1 disposed on the outer side of the outer peripheral wall portion 72 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 72.

[0183] The second U-phase jumper wire 42-U2 passes through the second U-phase lead-out side slot 74-U3 and the second U-phase lead-in side slot 74-U4 such that a portion of the second U-phase jumper wire 42-U2 is disposed on the outer side of the outer peripheral wall portion 72. Furthermore, the second U-phase jumper wire 42-U2 contacts the bottom of the second U-phase lead-out side slot 74-U3 and the bottom of the second U-phase lead-in side slot 74-U4. Furthermore, the second U-phase jumper wire 42-U2 is disposed along the outer peripheral surface of the outer peripheral wall portion 72 in a non-flexible manner, with the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 72. Therefore, the portion of the second U-phase jumper wire 42-U2 disposed on the outer side of the outer peripheral wall portion 72 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 72.

[0184] The first V-phase jumper wire 42-V1 passes through the first V-phase lead-out side slot 74-V1 and the first V-phase lead-in side slot 74-V2 such that a portion of the first V-phase jumper wire 42-V1 is disposed on the outer side of the outer peripheral wall portion 72. Furthermore, the first V-phase jumper wire 42-V1 contacts the bottom of the first V-phase lead-out side slot 74-V1 and the bottom of the first V-phase lead-in side slot 74-V2. Furthermore, the first V-phase jumper wire 42-V1 is disposed along the outer peripheral surface of the outer peripheral wall portion 72 in a non-flexible manner, with the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 72. Therefore, the portion of the first V-phase jumper wire 42-V1 disposed on the outer side of the outer peripheral wall portion 72 is disposed along a predetermined area in the outer peripheral surface of the outer peripheral wall portion 72.

[0185] The second V-phase jumper wire 42-V2 passes through the second V-phase lead-out side slot 74-V3 and the second V-phase lead-in side slot 74-V4 such that a portion of the second V-phase jumper wire 42-V2 is disposed on the outer side of the outer peripheral wall portion 72. Furthermore, the second V-phase jumper wire 42-V2 contacts the bottom of the second V-phase lead-out side slot 74-V3 and the bottom of the second V-phase lead-in side slot 74-V4. Furthermore, the second V-phase jumper wire 42-V2 is disposed along the outer peripheral surface of the outer peripheral wall portion 72 in a non-flexible manner, with the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 72. Therefore, the portion of the second V-phase jumper wire 42-V2 disposed on the outer side of the outer peripheral wall portion 72 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 72.

[0186] The first W-phase jumper wire 42-W1 passes through the first W-phase lead-out side slot 74-W1 and the first W-phase lead-in side slot 74-W2 such that a portion of the first W-phase jumper wire 42-W1 is disposed on the outer side of the outer peripheral wall portion 72. Furthermore, the first W-phase jumper wire 42-W1 contacts the bottom of the first W-phase lead-out side slot 74-W1 and the bottom of the first W-phase lead-in side slot 74-W2. Furthermore, the first W-phase jumper wire 42-W1 is disposed along the outer peripheral surface of the outer peripheral wall portion 72 in a non-flexible manner, with the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 72. Therefore, the portion of the first W-phase jumper wire 42-W1 disposed on the outer side of the outer peripheral wall portion 72 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 72.

[0187] The second W-phase jumper wire 42-W2 passes through the second W-phase lead-out side slot 74-W3 and the second W-phase lead-in side slot 74-W4 such that a portion of the second W-phase jumper wire 42-W2 is disposed on the outer side of the outer peripheral wall portion 72. Furthermore, the second W-phase jumper wire 42-W2 contacts the bottom of the second W-phase lead-out side slot 74-W3 and the bottom of the second W-phase lead-in side slot 74-W4. Furthermore, the second W-phase jumper wire 42-W2 is disposed along the outer peripheral surface of the outer peripheral wall portion 72 in a non-flexible manner, with the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 72. Therefore, the portion of the second W-phase jumper wire 42-W2 disposed on the outer side of the outer peripheral wall portion 72 is disposed along a predetermined area on the outer peripheral surface of the outer peripheral wall portion 72.

[0188] The lower insulating frame 71 also includes a plurality of retaining edges 75 corresponding to the plurality of jumper wires 42. Each of the plurality of retaining edges 75 protrudes outward from the outer peripheral surface of the outer peripheral wall portion 72. The retaining edge 75 corresponding to a particular jumper wire is positioned on the reverse guiding side of the portion of that jumper wire located on the outer side of the outer peripheral wall portion 72 and contacts that portion. Therefore, the stator 22 can prevent the portion of the plurality of jumper wires 42 located on the outer side of the outer peripheral wall portion 72 from shifting from a predetermined area in the outer peripheral surface of the outer peripheral wall portion 72 towards the reverse guiding side.

[0189] In stator 22, for the U phase, there are two U-phase jumpers 42-U1 to 42-U2. One of the U-phase jumpers 42-U1 to 42-U2, namely the first U-phase jumper 42-U1, connects the first U-phase winding 24-U1 to the second U-phase winding 24-U2 of the four U-phase windings 24-U1 to 24-U4. The other U-phase jumper 42-U2 connects the third U-phase winding 24-U3 to the fourth U-phase winding 24-U4. In stator 22, for the V and W phases, similarly to the U phase, each phase has two jumpers.

[0190] The outer peripheral wall 72 of the lower insulating frame 71 has a plurality of slits 74. A jumper wire connecting to the winding end point of the winding is led out from a plurality of lead-out side slits among the plurality of slits 74. A jumper wire connecting to the winding start point of the winding is introduced from a plurality of lead-in side slits among the plurality of slits 74. Each of the plurality of jumper wires 42 passes through both the lead-out side slit and the lead-in side slit formed in the outer peripheral wall 72 of the lower insulating frame 71, and a portion is disposed on the outer peripheral side of the outer peripheral wall 72. Further, in each of the three phases, at least two of the four slits—the lead-out side slit of the first jumper wire, the lead-in side slit of the first jumper wire, the lead-out side slit of the second jumper wire, and the lead-in side slit of the second jumper wire—have the same depth.

[0191] By making at least two types of gaps the same depth, four types of gaps are formed by three or fewer gaps of different depths. The motor 5 of Embodiment 4 does not require that the four gaps for maintaining the jumper wires have different depths, which can ensure the insulation distance between the jumper wires, while reducing the axial height of the outer peripheral wall portion 72, which enables the motor 5 to be miniaturized while ensuring insulation.

[0192] Furthermore, the conductors of the four U-phase windings 24-U1 to 24-U4 of the motor 5 forming Embodiment 4 include a first U-phase series connection portion 45-U1 and a second U-phase series connection portion 45-U2. In the first U-phase series connection portion 45-U1, the first U-phase winding 24-U1 and the second U-phase winding 24-U2 of the four U-phase windings 24-U1 to 24-U4 are connected in series. In the second U-phase series connection portion 45-U2, the third U-phase winding 24-U3 and the fourth U-phase winding 24-U4 of the four U-phase windings 24-U1 to 24-U4 are connected in series. The first U-phase series connection portion 45-U1 and the second U-phase series connection portion 45-U2 are connected in parallel. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same manner as the four U-phase windings 24-U1 to 24-U4. In Example 4, the motor 5 is connected in such a way that the jumpers for each phase become two.

[0193] In addition, in the motor 5 of embodiment 4, when the first U-phase winding 24-U1, the second U-phase winding 24-U2, the third U-phase winding 24-U3, and the fourth U-phase winding 24-U4 of the four U-phase windings 24-U1 to 24-U4 are arranged in the circumferential direction in this order, one of the two U-phase jumpers 42-U1 to 42-U2, namely the first U-phase jumper 42-U1, connects the first U-phase winding 24-U1 to the second U-phase winding 24-U2, and the other U-phase jumper 42-U1 to 42-U2, namely the second U-phase jumper 42-U2, connects the third U-phase winding 24-U3 to the fourth U-phase winding 24-U4. The four V-phase windings 24-V1 to 24-V4 and the four W-phase windings 24-W1 to 24-W4 are also connected in the same way as the four U-phase windings 24-U1 to 24-U4. That is, the multiple windings 24 of the motor 5 in Embodiment 4 are connected in adjacent poles.

[0194] Furthermore, in Embodiment 4, the motor 5 is configured such that the shapes of the four V-phase gaps 74-V1 to 74-V4 are identical to the shapes of the four U-phase gaps 74-U1 to 74-U4, and the shapes of the four W-phase gaps 74-W1 to 74-W4 are identical to the shapes of the four U-phase gaps 74-U1 to 74-U4. That is, the multiple gaps 74 are configured such that when the outer peripheral wall portion 72 of the lower insulating frame 71 virtually rotates around the rotation axis 16, the four U-phase gaps 74-U1 to 74-U4 after rotation are identical to the four V-phase gaps 74-V1 to 74-V4 or the four W-phase gaps 74-W1 to 74-W4 before rotation. The motor 5 of Embodiment 1 can form multiple windings 24 corresponding to each of the three phases by using three wires supplied by three lead outlets that are synchronously linked in the automatic winding machine.

[0195] Furthermore, in Embodiment 4, the motor 5 is configured such that when the outer peripheral wall portion 72 of the lower insulating frame 71 is virtually rotated 30 degrees circumferentially around the rotation axis 16, the four U-phase gaps 74-U1 to 74-U4 coincide with the four V-phase gaps 74-V1 to 74-V4. The motor 5 in Embodiment 4 is also configured such that when the outer peripheral wall portion 72 of the lower insulating frame 71 is virtually rotated 60 degrees (=30+30) circumferentially around the rotation axis 16, the four U-phase gaps 74-U1 to 74-U4 coincide with the four W-phase gaps 74-W1 to 74-W4. In this case, the motor 5 in Embodiment 4 can accommodate two different depths for the four U-phase gaps 74-U1 to 74-U4.

[0196] Furthermore, in the motor 5 of Embodiment 4, the depth of two of the four U-phase gaps 74-U1 to 74-U4 is a first depth d1, and the depth of the other two U-phase gaps is a second depth d2, which is shallower than the first depth d1. The four V-phase gaps 74-V1 to 74-V4 and the four W-phase gaps 74-W1 to 74-W4 are also formed in the same manner as the four U-phase gaps 74-U1 to 74-U4. In this way, the motor 5 of Embodiment 4 can ensure the insulation distance between the jumper wires of different phases, while maintaining two different gap depths to reduce the axial height of the outer peripheral wall portion 72 of the lower insulation frame 71. This allows for miniaturization of the motor 5 while ensuring insulation performance.

[0197] Furthermore, in the motor 5 of Embodiment 4, the depths of the first U-phase lead-out side gap 74-U1 and the second U-phase lead-out side gap 74-U3 among the four U-phase gaps 74-U1 to 74-U4 are both a first depth d1, and the depths of the first U-phase lead-in side gap 74-U2 and the second U-phase lead-in side gap 74-U4 are both a second depth d2, shallower than the first depth d1. The four V-phase gaps 74-V1 to 74-V4 and the four W-phase gaps 74-W1 to 74-W4 are also formed in the same manner as the four U-phase gaps 74-U1 to 74-U4. In this case, in the motor 5 of Embodiment 4, when the spacing between the three-phase gaps is 30 degrees in adjacent pole connections, the types of gap depths can be reduced to two, while ensuring insulation distance and preventing the overlap of crossover wires between different phases.

[0198] The motor of Embodiment 4, formed as described above, ensures insulation between the plurality of jumper wires 42, similar to the motor 5 of Embodiment 1. Furthermore, the motor of Embodiment 4 reduces the axial height of the outer peripheral wall portion 72 by forming a plurality of gaps 74 from both a plurality of gaps of a first depth d1 and a plurality of gaps of a second depth d2. Because the outer peripheral wall portion 72 of the motor of Embodiment 4 has a smaller height, its axial height can be reduced. Since the motor of Embodiment 4 has a smaller height, the compressor equipped with the motor of Embodiment 4 can reduce its axial height.

[0199] On the other hand, in the above embodiment, the outer peripheral wall portions 35, 52, 72 of the motor have multiple flanges 49, 55, 75 formed, but the multiple flanges 49, 55, 75 may be omitted. Even when the multiple flanges 49, 55, 75 are omitted, the motor can still prevent the jumpers of different phases among the multiple jumpers 42 from contacting each other, just like the motor in the above embodiment, by keeping the multiple jumper wires 42 far apart from each other.

[0200] The embodiments described above are examples, but the embodiments are not limited to the above content. Furthermore, the structural elements described above include structural elements that are readily conceived by those skilled in the art, substantially the same, and within the so-called equivalent range. Moreover, the structural elements described above can be appropriately combined. Furthermore, at least one of various omissions, substitutions, and modifications can be made to the structural elements without departing from the spirit of the embodiments.

[0201] Symbol Explanation 1: Compressor 5: Electric motor 6: Compression section 16: Rotation axis 21: Rotor 22: Stator 23: Stator core 24: Multiple windings 25: Lower Insulation Frame 31: Yoke 32-1~32-12: Multiple stator core teeth 35: Peripheral wall portion 36-1~36-12: Multiple insulating frame teeth 38: Rotor core 39: Permanent magnet 41-1: First Neutral Point 41-2: Second Neutral Point 42: Multiple jumper wires 43: Multiple neutral lines 44: Multiple power cords 45-U1: First U-phase series connection section 45-U2: Second U-phase series connection section 45-V1: First V-phase series connection section 45-V2: Second V-phase series connection section 45-W1: First W-phase series connection section 45-W2: Second W-phase series connection section 48-U1~48-U4: Four U-phase gaps 48-V1~48-V4: Four V-phase gaps 48-W1~48-W4: Four W-phase gaps 49: Multiple flanges 51: Lower Insulation Frame 52: Peripheral wall portion 54-U1~54-U4: Four U-phase gaps 54-V1~54-V4: Four V-phase gaps 54-W1~54-W4: Four W-phase gaps 55: Multiple flanges 60-U: U-connected wiring 60-V: V connection wiring 60-W: W connection wiring 61: Lower Insulation Frame 62: Peripheral wall portion 64-U1~64-U6: Six U-phase gaps 64-V1~64-V6: Six V-phase gaps 64-W1~64-W6: Six W-phase gaps 71: Lower Insulation Frame 72: Peripheral wall portion 74-U1~74-U4: Four U-phase gaps 74-V1~74-V4: Four V-phase gaps 74-W1~74-W4: Four W-phase gaps 75: Multiple side guards.

Claims

1. An electric motor, characterized in that, have: Rotor; and The stator generates a magnetic field that causes the rotor to rotate about its axis of rotation. The stator has: The stator core has: an annular yoke surrounding the outer periphery of the rotor, and a plurality of teeth, namely the first to the twelfth teeth, protruding from the inner periphery of the yoke toward the rotor and arranged in the circumferential direction. A cylindrical insulating frame is disposed at one end of the stator core, parallel to the axial direction of the rotation axis; and Multiple windings are formed by winding wires through the insulating frame onto the teeth of the multiple teeth. The plurality of windings have four U-phase windings, four V-phase windings, and four W-phase windings, and are arranged such that two adjacent windings in the circumferential direction of the stator core are windings of different phases. The stator also has the following features for each of the three phases: The first jumper is a jumper that connects two of the four windings in phase to each other. as well as The second jumper is a jumper that connects two other windings of the four windings in phase to each other. The insulating frame has multiple slits, including: multiple lead-out slits for connection to the jumper wire and leading out from the winding end point, and multiple lead-in slits for connection to the jumper wire and leading into the winding start point. Each of the plurality of jumpers passes through the lead-out side gap and the lead-in side gap formed in the insulating frame, thereby connecting the two windings of the same phase to each other. In each of the three phases, at least two of the four gaps in the lead-out side gap of the first jumper wire, the lead-in side gap of the first jumper wire, the lead-out side gap of the second jumper wire, and the lead-in side gap of the second jumper wire have the same depth.

2. The electric motor according to claim 1, characterized in that, The portion of the jumper wire disposed on the outer periphery of the insulating frame is axially positioned through the bottom of the gap.

3. The electric motor according to claim 1, characterized in that, The rotor has eight poles.

4. The electric motor according to claim 3, characterized in that, The conductor forming one phase of the three-phase system comprises: a first series connection consisting of two of the four windings connected in series, and a second series connection consisting of the other two of the four windings connected in series. The first series section and the second series section are connected in parallel.

5. The electric motor according to claim 1, characterized in that, The side of the two windings that are connected by the jumper wire that is not connected to the jumper wire can be connected to either the power line or the neutral line.

6. The electric motor according to claim 1, characterized in that, For each phase of the three phases, the combination of the depths of the four gaps is common.

7. The electric motor according to claim 1, characterized in that, Let any one of phases U, V, and W be phase X, and When the four windings of phase X are arranged in circumferential order as the first phase X winding, the second phase X winding, the third phase X winding, and the fourth phase X winding, One of the two jumpers for phase X, namely the first phase X jumper, connects the first phase X winding and the second phase X winding. The other of the two jumpers in phase X, namely the second phase X jumper, connects the third phase X winding and the fourth phase X winding.

8. The electric motor according to claim 7, characterized in that, When the four gaps of a phase are virtually rotated by a predetermined angle around the rotation axis, the shape of the four gaps of the phase becomes consistent with the shape of the four gaps of the other phases.

9. The electric motor according to claim 8, characterized in that, The four gaps of the phase are virtually rotated around the circumference by a predetermined angle of 120 degrees and 240 degrees.

10. The electric motor according to claim 9, characterized in that, In each of the three phases, among the four gaps of the first jumper wire lead-out side gap, the first jumper wire lead-in side gap, the second jumper wire lead-out side gap, and the second jumper wire lead-in side gap, two gaps have a depth of the first depth, and the remaining two gaps have a depth of the second depth, which is shallower than the first depth.

11. The electric motor according to claim 10, characterized in that, In the aforementioned phase, The depth of the lead-out gap of the first jumper wire and the depth of the lead-in gap of the first jumper wire are both the first depth. The depth of the lead-out gap of the second jumper wire and the depth of the lead-in gap of the second jumper wire are both the second depth, which is shallower than the first depth.

12. The electric motor according to claim 10, characterized in that, It has a connecting wire that is led out from the second X-phase winding and connected to the power line of the X-phase, and the connecting wire is led out through the gap to the outer periphery of the insulating frame. The two gaps through which the connecting wire passes are both a third depth that is shallower than the first depth and deeper than the second depth.

13. The electric motor according to claim 8, characterized in that, The four gaps of the phase are virtually rotated around the circumference by a predetermined angle of 30 degrees and 60 degrees.

14. The electric motor according to claim 13, characterized in that, In each of the three phases, among the four gaps of the first jumper wire lead-out side gap, the first jumper wire lead-in side gap, the second jumper wire lead-out side gap, and the second jumper wire lead-in side gap, two gaps have a depth of the first depth, and the remaining two gaps have a depth of the second depth, which is shallower than the first depth.

15. The electric motor according to claim 14, characterized in that, In the aforementioned phase, The depth of the lead-out side gap of the first jumper wire and the depth of the lead-out side gap of the second jumper wire are both the first depth. The depth of the inlet side gap of the first jumper wire and the depth of the inlet side gap of the second jumper wire are both the second depth, which is shallower than the first depth.

16. The electric motor according to claim 1, characterized in that, Let any one of phases U, V, and W be phase X, and When the four windings of phase X are arranged in circumferential order as the first phase X winding, the second phase X winding, the third phase X winding, and the fourth phase X winding, One of the two jumper wires of phase X, namely the first phase X jumper wire, connects the first phase X winding and the third phase X winding. The other of the two jumpers in phase X, namely the second phase X jumper, connects the second phase X winding to the fourth phase X winding.

17. The electric motor according to claim 16, characterized in that, When the four gaps of a phase are virtually rotated by a predetermined angle around the rotation axis, the shape of the four gaps of the phase becomes consistent with the shape of the four gaps of the other phases.

18. The electric motor according to claim 17, characterized in that, The four gaps of the phase are virtually rotated around the circumference by a predetermined angle of 120 degrees and 240 degrees.

19. The electric motor according to claim 18, characterized in that, In the aforementioned phase, The depth of the gap on the lead-out side of the first jumper wire is the first depth. The depth of the inlet side gap of the first jumper wire and the depth of the outlet side gap of the second jumper wire are both a second depth that is shallower than the first depth. The depth of the gap on the inlet side of the second jumper is a third depth that is shallower than the second depth.

20. The electric motor according to claim 1, characterized in that, The outer peripheral surface of the insulating frame is formed with multiple retaining edges. The retaining edge restricts the axial movement of the jumper wire.

21. A compressor, characterized in that, have: An electric motor having a rotor and a stator for generating a magnetic field that causes the rotor to rotate about a rotation axis; A compression section that compresses the refrigerant by rotating the rotor; and The housing has an enclosed space inside that houses the motor and the compressor unit. The stator has: The stator core has: an annular yoke surrounding the outer periphery of the rotor, and a plurality of teeth, namely the first to the twelfth teeth, protruding from the inner periphery of the yoke toward the rotor and arranged in the circumferential direction. A cylindrical insulating frame is disposed at one end of the stator core, parallel to the axial direction of the rotation axis; and Multiple windings are formed by winding wires through the insulating frame onto the teeth of the multiple teeth. The plurality of windings have four U-phase windings, four V-phase windings, and four W-phase windings, and are arranged such that two adjacent windings in the circumferential direction of the stator core are windings of different phases. The stator also has the following features for each of the three phases: The first jumper is a jumper that connects two of the four windings in phase to each other. as well as The second jumper is a jumper that connects two other windings of the four windings in phase to each other. The insulating frame has multiple slits, including: multiple lead-out slits for connection to the jumper wire and leading out from the winding end point, and multiple lead-in slits for connection to the jumper wire and leading into the winding start point. Each of the plurality of jumpers passes through the lead-out side gap and the lead-in side gap formed in the insulating frame, thereby connecting the two windings of the same phase to each other. In each of the three phases, at least two of the four gaps in the lead-out side gap of the first jumper wire, the lead-in side gap of the first jumper wire, the lead-out side gap of the second jumper wire, and the lead-in side gap of the second jumper wire have the same depth.

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