Insulating frame and electric motor

Abstract

The outer peripheral wall portion (41) of the insulating frame (25) has a plurality of slits (44A, 44B, 44C, 44D) formed so as to extend along the center axis from one end in the center axis direction of the outer peripheral wall portion (41) for passage of the winding wire (46) drawn from the winding portion (45). The outer peripheral wall portion (41) is formed with a connecting slit (55) connecting two slits (44A, 44B) adjacent in the circumferential direction of the outer peripheral wall portion (41) and extending from one end to different depths, and a step portion (58) is provided.

Description

Technical Field

[0001] This invention relates to insulating frames and electric motors. Background Technology

[0002] As a compressor motor, an electric motor is known to include: a rotor; a stator disposed on the outer periphery of the rotor; and a cylindrical insulating frame disposed at the axial end of the stator. In this type of motor, the conductor, i.e., the winding wire, is wound around the teeth of the stator to form a drum section, from which the winding wire is led out and laid along the circumference of the insulating frame before being wound around other teeth to form a winding section.

[0003] The insulating frame has a cylindrical outer peripheral wall portion and a winding portion, which is disposed on the inner periphery of the outer peripheral wall portion corresponding to the teeth of the stator for winding wires. Multiple slits are formed in the outer peripheral wall portion of the insulating frame, which extend from one end opposite to the stator toward the stator side. The winding wires led out from the winding portion pass through each slit and are led out from the inner periphery of the outer peripheral wall portion to the outer periphery side, and are mounted along the outer peripheral surface of the outer peripheral wall portion.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2020-141495 Summary of the Invention

[0005] As described above, there exists a three-phase motor in which the winding sections of each phase are arranged one phase at a time along the circumference of the stator in a specific order. The manufacturing process of this three-phase motor uses a winding machine, which supplies winding wire from a lead-out nozzle, winds the winding wire across the stator core teeth and the winding section of the insulating frame, and winds the winding wire along the outer circumferential wall of the insulating frame. When using a winding machine to form the winding sections of the three phases, there are two methods: using three lead-out nozzles that operate synchronously to simultaneously wind the winding wires of the three phases, thereby forming a three-phase winding section (hereinafter referred to as three-lead-out nozzle winding); and using a single lead-out nozzle to wind the winding wires of each phase one phase at a time, thereby forming the winding section sequentially (hereinafter referred to as single-lead-out nozzle winding).

[0006] Figure 12 This is a diagram showing the unfolded diagram of the phase windings of a 9-slot three-phase motor, which are wound onto a conventional insulating frame via three lead-out nozzles. Figure 13 This is a diagram showing the unfolded diagram of the phase windings of a 9-slot three-phase motor, which are wound onto a conventional insulating frame via a single lead-out nozzle. Figure 12 and Figure 13This is a unfolded view taken from the inner circumference of the insulating frame. The lower part of the diagram shows the guide side, where the power supply line (lead) is located, and the upper part shows the anti-guide side, which is opposite to the stator side. In each winding section forming nine slots, the winding wires are wound in a counter-clockwise direction (CCW).

[0007] First, the method of winding the phase windings using a three-outlet winding system will be explained. For example... Figure 12 As shown, winding sections 45, which are formed by winding wires 46 to represent phases U, V, and W respectively, are constructed. Simultaneously, the winding wires 46 extending from each winding section 45 pass through the gaps 103 of the outer peripheral wall 102 of the insulation frame 101, thereby creating bridging portions 49 of the winding wires 46 for each phase along the outer peripheral surface of the outer peripheral wall 102. For example, the U-phase bridging portion 49-U extending from the U-phase winding wire 46-U and the V-phase bridging portion 49-V extending from the V-phase winding wire 46-V are positioned on the outer peripheral wall 102 without crossing. Thus, the bridging portions 49 of each phase are spaced apart from each other on the outer peripheral wall 102 of the insulation frame 101, ensuring the insulation distance between the winding wires 46 of different phases. This suppresses the superposition of out-of-phase noise on the electrical signals used to drive the three-phase motor.

[0008] Next, the case of winding the winding wires 46 of each phase using the conventional insulating frame 101 used in the three-outlet winding as described above, by winding with a single outlet, will be explained. Figure 13 The diagram illustrates, for example, the winding of each phase in the order of V-phase, W-phase, U-phase. Figure 13 As shown, when the winding wires 46 of each phase are wound using a single lead-out nozzle, when the last wound U-phase winding wire 46-U of the three phases passes through the gap 103 and forms a U-phase jumper portion 49-U along the outer peripheral surface of the outer peripheral wall portion 102, the U-phase jumper portion 49-U overlaps with the V-phase jumper portion 49-V that extends from the V-phase winding wire 46-V and is mounted on the outer peripheral wall portion 102. This results in a crossover portion 105 formed by the intersection of the jumper portions of two different phases. Although not shown, when the winding wires 46 of each phase are wound in a different order than described above, the same crossover portion 105 will also occur between the jumper portions 49 of two phases of the three phases.

[0009] Therefore, when the winding wire 46 is mounted on the insulating frame used in three-outlet winding using single-outlet winding, a crossing portion 105 is generated at the jumper portion 49, making it impossible to ensure the insulation distance between the winding wires 46 of each phase. On the other hand, it is possible to avoid the crossing portion in single-outlet winding by preparing separate insulating frames for three-outlet winding and single-outlet winding. However, in this case, two different molding dies for the insulating frames for three-outlet winding and single-outlet winding are required, which increases manufacturing costs. In addition, since the insulating frames for three-outlet winding and single-outlet winding are almost indistinguishable in shape, there is a risk of misuse of the wrong insulating frame. Furthermore, in the manufacturing process of three-phase motors, when switching between three-outlet winding and single-outlet winding is required, the operation becomes complicated, further increasing the manufacturing cost of three-phase motors.

[0010] The disclosed technology is proposed in view of the above-mentioned problems, and its purpose is to provide an insulating frame and an electric motor that can achieve the universality of the insulating frame between single-outlet winding and triple-outlet winding.

[0011] One embodiment of the insulating frame disclosed in this invention is an insulating frame applied to a three-phase motor and fixed at the end of the stator in the direction of the central axis. In the three-phase motor, a winding portion formed by winding wires is arranged along the circumference of the cylindrical stator. The insulating frame includes a cylindrical outer peripheral wall portion and a winding portion. The winding portion is provided on the inner circumference of the outer peripheral wall portion for winding wires to be wound. The outer peripheral wall portion has a plurality of slits that extend along the central axis from one end of the outer peripheral wall portion for winding wires to pass through. The outer peripheral wall portion has connecting slits that are adjacent in the circumferential direction of the outer peripheral wall portion and extend from one end to different depths, thereby providing a stepped portion.

[0012] According to one embodiment of the insulating frame disclosed in this invention, the insulating frame for forming a three-phase winding section can be generalized between single-outlet winding and three-outlet winding. Attached Figure Description

[0013] Figure 1 This is a longitudinal sectional view of a compressor equipped with a three-phase electric motor according to an embodiment.

[0014] Figure 2 This is a top view of the three-phase motor of the embodiment, shown from the side of the upper insulating frame.

[0015] Figure 3 This is a bottom view of the stator core in an embodiment.

[0016] Figure 4 This is a perspective view showing the lower insulating frame of an embodiment.

[0017] Figure 5 This is a bottom view of the stator in an embodiment.

[0018] Figure 6 This is a diagram showing the unfolded windings of each phase wound on the lower insulating frame of the embodiment, which are wound through a three-outlet winding.

[0019] Figure 7 This is a wiring diagram showing the wiring status of the windings of each phase in the embodiment.

[0020] Figure 8 This is an enlarged view showing the winding wire wound around the main part of the lower insulating frame of the embodiment via a three-outlet winding.

[0021] Figure 9 This is a diagram showing the unfolded winding of each phase of the lower insulating frame wound through a single lead-out nozzle in the embodiment.

[0022] Figure 10 This is an enlarged view showing the winding wire wound around the main part of the lower insulating frame of the embodiment via a single lead-out nozzle.

[0023] Figure 11 This is an enlarged view showing a modified example of the main part of the lower insulating frame in the embodiment.

[0024] Figure 12 This is a diagram showing the unfolded windings of each phase of a conventional insulating frame, which are wound through three lead-out nozzles.

[0025] Figure 13 It is a diagram showing the unfolded windings of each phase of a conventional insulating frame wound through a single lead-out nozzle. Detailed Implementation

[0026] The embodiments of the insulating frame and motor disclosed in this application will now be described in detail with reference to the accompanying drawings. Furthermore, the insulating frame and motor disclosed in this application are not limited to the following embodiments.

[0027] Example

[0028] Figure 1 This is a longitudinal sectional view of a compressor equipped with a three-phase electric motor according to an embodiment. Figure 1As shown, compressor 1 is a rotary compressor, comprising: a container 2, a rotating shaft 3, a compression section 5, and a three-phase electric motor 6. The container 2 is made of metal and has a sealed internal space 7. The internal space 7 is generally cylindrical. When the container 2 is placed vertically on a horizontal plane, its configuration is such that the central axis of the cylinder formed by the internal space 7 is parallel to the vertical direction. An oil reservoir 8 is formed in the lower part of the internal space 7 within the container 2. The oil reservoir 8 stores lubricating oil, i.e., refrigerant oil, used to lubricate the compression section 5. The container 2 is connected to an inlet pipe 11 and a outlet pipe 12. The inlet pipe 11 introduces refrigerant, and the outlet pipe 12 discharges compressed refrigerant. The rotating shaft 3, serving as the rotating shaft, is rod-shaped and is disposed within the internal space 7 of the container 2, with one end attached to the oil reservoir 8. The rotating shaft 3 is supported in the container 2 in a manner that allows it to rotate around the central axis of the cylinder formed by the internal space 7. The rotating shaft 3 supplies the refrigeration oil stored in the oil reservoir 8 to the compression section 5 by rotating.

[0029] The compressor unit 5 is located in the lower part of the internal space 7 and above the oil reservoir 8. The compressor 1 also includes an upper silencer cover 14 and a lower silencer cover 15. The upper silencer cover 14 is located above the compressor unit 5 in the internal space 7. An upper silencer chamber 16 is formed inside the upper silencer cover 14. The lower silencer cover 15 is located in the lower part of the compressor unit 5 in the internal space 7 and above the oil reservoir 8. A lower silencer chamber 17 is formed inside the lower silencer cover 15. The lower silencer chamber 17 communicates with the upper silencer chamber 16 through a connecting passage (not shown) formed in the compressor unit 5. A refrigerant discharge port 18 is formed between the upper silencer cover 14 and the rotating shaft 3, and the upper silencer chamber 16 communicates with the internal space 7 through the refrigerant discharge port 18.

[0030] The compression unit 5 uses the rotation of the rotating shaft 3 to compress the refrigerant supplied from the inlet pipe 11, and supplies the compressed refrigerant to the upper silencing chamber 16 and the lower silencing chamber 17. The refrigerant is miscible with refrigeration oil. A three-phase motor 6 is located in the upper part of the compression unit 5 in the internal space 7.

[0031] Figure 2 This is a top view of the three-phase motor 6 of the embodiment, shown from the side of the upper insulating frame. (As shown) Figure 1 and Figure 2 As shown, the three-phase motor 6 includes a rotor 21 and a stator 22. The rotor 21 is formed into a cylindrical shape by stacking multiple thin silicon steel sheets (magnetic materials) and is integrated by multiple rivets 9. A rotating shaft 3 is inserted through the center of the rotor 21, and the rotor 21 is fixed to the rotating shaft 3. Six slit-shaped magnet insertion holes 10a are formed in the rotor 21 in such a way that each side forms a hexagon centered on the rotating shaft 3. Each magnet insertion hole 10a is formed at a predetermined interval in the circumferential direction of the rotor 21. A plate-shaped permanent magnet 10b is inserted into the magnet insertion hole 10a.

[0032] The stator 22 is formed in a generally cylindrical shape, arranged to surround the rotor 21, and fixed to the container 2. The stator 22 includes: a stator core 23, an upper insulating frame 24, a lower insulating frame 25, and a plurality of winding wires 46 as conductors. The upper insulating frame 24 is fixed to the upper end of the stator core 23. The lower insulating frame 25 is fixed to the lower end of the stator core 23. The upper insulating frame 24 and the lower insulating frame 25 are examples of insulating portions that insulate the stator core 23 from the winding wires 46.

[0033] Figure 3 This is a bottom view showing the stator core 23 of the embodiment. The stator core 23 is formed, for example, by stacking multiple plates made of a soft magnetic material, such as silicon steel plates. Figure 3 As shown, the device includes a yoke 31 and multiple stator core teeth 32-1 to 32-9. The yoke 31 is generally cylindrical. The first stator core tooth 32-1 among the multiple stator core teeth 32-1 to 32-9 is generally cylindrical. One end of the first stator core tooth 32-1 is connected to the inner circumferential surface of the yoke 31, that is, it is formed to protrude from the inner circumferential surface of the yoke 31. The stator core teeth 32-1 to 32-9 that are different from the first stator core tooth 32-1 are also generally cylindrical and protrude from the inner circumferential surface of the yoke 31, similar to the first stator core tooth 32-1. Furthermore, in the case of a 9-slot stator, the multiple stator core teeth 32-1 to 32-9 are arranged at equal intervals of 40 degrees on the inner circumferential surface of the yoke 31.

[0034] Figure 4 This is a perspective view showing the lower insulating frame 25 of an embodiment. The lower insulating frame 25 is formed into a cylindrical shape from an insulator, such as polybutylene terephthalate resin (PBT). Figure 4 As shown, the lower insulating frame 25 has an outer peripheral wall portion 41, multiple insulating frame teeth 42-1 to 42-9 serving as a spool portion for winding the winding wire 46, and multiple flange portions 43-1 to 43-9. The outer peripheral wall portion 41 is formed in a generally cylindrical shape. In the outer peripheral wall portion 41, multiple slits 44 are formed at intervals in the circumferential direction, extending from one end of the outer peripheral wall portion 41 in the direction of the central axis C (the axial direction of the rotation axis 3) along the central axis C. Furthermore, the other end of the outer peripheral wall portion 41 in the direction of the central axis C abuts against the stator core 23. In other words, the multiple slits 44 are formed to extend from one end of the outer peripheral wall portion 41 opposite to the stator core 23 (the anti-guide side) toward the stator core 23 side (the guide side). The winding wire 46, which is drawn from the winding section 45 as described later, passes through each gap 44 and is thus drawn from the inner peripheral side of the outer peripheral wall section 41 to the outer peripheral side and erected along the outer peripheral surface of the outer peripheral wall section 41. The multiple gaps 44 will be described in detail later.

[0035] The first insulating frame tooth 42-1 among the plurality of insulating frame teeth 42-1 to 42-9 is formed as a straight cylinder with a generally semi-circular cross-section. One end of the first insulating frame tooth 42-1 is formed to connect with the inner peripheral surface of the outer peripheral wall portion 41, that is, it is formed to protrude from the inner peripheral surface of the outer peripheral wall portion 41. The insulating frame teeth 42-1 to 42-9 that are different from the first insulating frame tooth 42-1 are also formed as straight cylinders, and like the first insulating frame tooth 42-1, they are formed to protrude from the inner peripheral surface of the outer peripheral wall portion 41. The plurality of insulating frame teeth 42-1 to 42-9 are formed to be arranged at equal intervals of 40 degrees on the inner peripheral surface of the outer peripheral wall portion 41.

[0036] Multiple flange portions 43-1 to 43-9 correspond to multiple insulating frame teeth 42-1 to 42-9, and are each formed into a generally semi-circular plate shape. The first flange portion 43-1, which corresponds to the first insulating frame tooth 42-1 among the multiple flange portions 43-1 to 43-9, is connected to the other end of the first insulating frame tooth 42-1 and is integrally formed with the first insulating frame tooth 42-1. The flange portions 43-1 to 43-9 that differ from the first flange portion 43-1 are also connected to the other end of the multiple insulating frame teeth 42-2 to 42-9 in the same manner as the first flange portion 43-1, and are integrally formed with the multiple insulating frame teeth 42-2 to 42-9 respectively.

[0037] Here, the lower insulating frame 25 has been described, and the upper insulating frame 24 is formed in the same manner as the lower insulating frame 25. That is, the upper insulating frame 24 is formed into a cylindrical shape from an insulator and has an outer peripheral wall portion 41, a plurality of insulating frame teeth 42-1 to 42-9, and a plurality of flange portions 43-1 to 43-9.

[0038] Figure 5 This is a bottom view showing the stator 22 in the embodiment. (See attached image.) Figure 5 As shown, multiple winding wires 46 are respectively wound around multiple stator core teeth 32-1 to 32-9 of the stator core 23. (As described later...) Figure 6 As shown, on each stator core tooth section 32-1 to 32-9, a winding section 45 is formed by each winding wire 46. Figure 5 In the diagram, the winding portions 45 forming nine slots are labeled with symbols 1 to 9 in a clockwise order. The three-phase motor 6 of this embodiment is a 6-pole, 9-slot concentrated winding type motor (see...). Figure 2 The plurality of winding lines 46 include: a plurality of U-phase winding lines 46-U1 to 46-U3 forming the U-phase winding portion 45, a plurality of V-phase winding lines 46-V1 to 46-V3 forming the V-phase winding portion 45, and a plurality of W-phase winding lines 46-W1 to 46-W3 forming the W-phase winding portion 45.

[0039] Furthermore, the electric motor of the present invention is not limited to 9 slots; it is sufficient as long as the number of slots, i.e., the number of winding portions 45, is 9 or more and a multiple of 3. In other words, it is sufficient as long as the number of insulating frame teeth 42 of the lower insulating frame 25 (upper insulating frame 24) is 9 or more and a multiple of 3.

[0040] The U-phase winding includes multiple windings 46. Specifically, the U-phase windings include: a first U-phase winding 46-U1, a second U-phase winding 46-U2, and a third U-phase winding 46-U3. The first U-phase winding 46-U1 is wound on the fourth stator core tooth section 32-4. The second U-phase winding 46-U2 is wound on the seventh stator core tooth section 32-7. The third U-phase winding 46-U3 is wound on the first stator core tooth section 32-1.

[0041] The V-phase windings include multiple windings 46. Specifically, the V-phase windings include: a first V-phase winding 46-V1, a second V-phase winding 46-V2, and a third V-phase winding 46-V3. The first V-phase winding 46-V1 is wound on the eighth stator core tooth section 32-8. The second V-phase winding 46-V2 is wound on the second stator core tooth section 32-2. The third V-phase winding 46-V3 is wound on the fifth stator core tooth section 32-5.

[0042] The W-phase winding includes multiple windings 46. Specifically, the W-phase windings include: a first W-phase winding 46-W1, a second W-phase winding 46-W2, and a third W-phase winding 46-W3. The first W-phase winding 46-W1 is wound on the sixth stator core tooth section 32-6. The second W-phase winding 46-W2 is wound on the ninth stator core tooth section 32-9. The third W-phase winding 46-W3 is wound on the third stator core tooth section 32-3.

[0043] The first stator core teeth 32-1, together with the first insulating frame teeth 42-1 of the lower insulating frame 25, the first insulating frame teeth 42-1 of the upper insulating frame 24, and the insulating film (not shown) disposed between the aforementioned insulating frames 24 and 25, are wound by the third U-phase winding 46-U3. Therefore, the third U-phase winding 46-U3 is properly insulated from the first stator core teeth 32-1 by passing through the upper insulating frame 24 and the lower insulating frame 25, thereby properly insulating from the stator core 23. Furthermore, the third U-phase winding 46-U3 is wound such that it is sandwiched between the first flange portion 43-1 and the outer peripheral wall portion 41 of the lower insulating frame 25, and also sandwiched between the first flange portion 43-1 and the outer peripheral wall portion 41 of the upper insulating frame 24. Therefore, the third U-phase winding 46-U3 is prevented from falling off from the first stator core teeth 32-1 to the rotor 21 side, i.e., from unwinding, thanks to the upper insulating frame 24 and the lower insulating frame 25.

[0044] For the other windings 46 that are different from the third U-phase winding 46-U3, they are also properly insulated from the stator core 23 by means of the upper insulating frame 24 and the lower insulating frame 25, and the unwinding is prevented.

[0045] The lower insulating frame 25 of this embodiment is formed on the premise that the winding wire 46 can be wound using both three-outlet winding and single-outlet winding methods. First, the lower insulating frame 25 with the winding wire 46 wound using the three-outlet winding method will be described here. The lower insulating frame 25 with the winding wire 46 wound using the single-outlet winding method will be described later.

[0046] Figure 6 This is a diagram showing the unfolded view of the winding wires 46 of each phase wound on the lower insulating frame 25 of the embodiment via a three-outlet winding. Figure 6 This is an unfolded view viewed from the inner circumference of the lower insulating frame 25. Figure 6 Below it is the guide side, which is the stator 22 side, and is equipped with power lines (leads) connected to winding lines 46. Figure 6 Above it is the anti-guide side, opposite to the guide side, which is the side opposite to the stator 22 side. Furthermore, in Figure 6 In the diagram, the winding portions 45 forming nine toothed grooves are labeled with symbols 1 to 9, arranged sequentially from left to right. A circle represents the starting end S of the power line connected to a power source (not shown) located outside the compressor 1, and a triangle represents the ending end E of the power line.

[0047] like Figure 6As shown, the first U-phase winding 46-U1 is wound counterclockwise (CCW: Counter Clock Wise) on the fourth stator core tooth 32-4. The second U-phase winding 46-U2 is wound counterclockwise on the seventh stator core tooth 32-7. The third U-phase winding 46-U3 is wound counterclockwise on the first stator core tooth 32-1. The first V-phase winding 46-V1 is wound counterclockwise on the eighth stator core tooth 32-8. The second V-phase winding 46-V2 is wound counterclockwise on the second stator core tooth 32-2. The third V-phase winding 46-V3 is wound counterclockwise on the fifth stator core tooth 32-5. The first W-phase winding 46-W1 is wound counterclockwise on the sixth stator core tooth 32-6. The second W-phase winding 46-W2 is wound counterclockwise around the ninth stator core tooth 32-9. The third W-phase winding 46-W3 is wound counterclockwise around the third stator core tooth 32-3. In this way, the winding 46 is wound counterclockwise around each of the three phase windings 45. However, this embodiment is not limited to a structure where the winding 46 of each of the three phase windings 45 is wound counterclockwise. The main parts of the structure of the lower insulating frame 25 in this embodiment will be described later.

[0048] The stator 22 also includes a U-phase neutral line 47-U, a V-phase neutral line 47-V, and a W-phase neutral line 47-W. The U-phase neutral line 47-U, V-phase neutral line 47-V, and W-phase neutral line 47-W are portions on the E-side of the power supply line termination. The U-phase neutral line 47-U, V-phase neutral line 47-V, and W-phase neutral line 47-W are located on the upper insulating frame 24 side, which is further away from the lower insulating frame 25 than the plurality of stator core teeth 32-1 to 32-9. Furthermore, a power supply line, i.e., a guide side, is also located on the upper insulating frame 24 side; therefore, in the following description, the upper insulating frame 24 side will also be referred to as the guide side.

[0049] One end of the U-phase neutral line 47-U is electrically connected to the second U-phase winding line 46-U2. One end of the U-phase neutral line 47-U is located on the seventh stator core tooth 32-7, and the other end is located on the guide side of the seventh stator core tooth 32-7. One end of the V-phase neutral line 47-V is electrically connected to the second V-phase winding line 46-V2. One end of the V-phase neutral line 47-V is located on the second stator core tooth 32-2, and the other end is located on the guide side of the second stator core tooth 32-2. One end of the W-phase neutral line 47-W is electrically connected to the first W-phase winding line 46-W1. One end of the W-phase neutral line 47-W is located on the ninth stator core tooth 32-9, and the other end is located on the guide side of the ninth stator core tooth 32-9.

[0050] The stator 22 also includes a U-phase power line 48-U, a V-phase power line 48-V, and a W-phase power line 48-W. One end of the U-phase power line 48-U, serving as the starting terminal S, is positioned on the guiding side of the first stator core tooth section 32-1. The other end of the U-phase power line 48-U is electrically connected to the third U-phase winding line 46-U3 wound around the first stator core tooth section 32-1.

[0051] The U-phase power line 48-U includes a first U-phase jumper portion 49-U1, which is a portion of the third U-phase winding line 46-U3 that passes through a gap 44 from the inner peripheral side of the outer peripheral wall portion 41 of the lower insulating frame 25 to the outer peripheral side of the outer peripheral wall portion 41. The first U-phase jumper portion 49-U1 is arranged along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulating frame 25. Furthermore, the first U-phase jumper portion 49-U1 passes through the gap 44 and is introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, thereby connecting with the first U-phase winding line 46-U1 wound on the fourth stator core tooth portion 32-4.

[0052] Furthermore, the U-phase power line 48-U includes a second U-phase jumper portion 49-U2, which is a portion of the first U-phase winding 46-U1 that passes through a gap 44 from the inner peripheral side of the outer peripheral wall portion 41 of the lower insulating frame 25 to the outer peripheral side of the outer peripheral wall portion 41. The second U-phase jumper portion 49-U2 is arranged along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulating frame 25. In addition, the second U-phase jumper portion 49-U2 passes through the gap 44 and is introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, thereby connecting with the second U-phase winding 46-U2 wound on the seventh stator core teeth 32-7. Furthermore, the U-phase power line 48-U includes a U-phase neutral line 47-U that is led out from the second U-phase winding 46-U2 and electrically connected to the termination end E.

[0053] One end of the V-phase power line 48-V, serving as the starting end S, is positioned on the guide side of the fifth stator core tooth portion 32-5. The other end of the V-phase power line 48-V is electrically connected to the third V-phase winding 46-V3 wound on the fifth stator core tooth portion 32-5. The V-phase power line 48-V includes a first V-phase bridging wire portion 49-V1, which is a portion of the third V-phase winding 46-V3 that passes through a gap 44 from the inner peripheral side of the outer peripheral wall portion 41 of the lower insulating frame 25 to the outer peripheral side of the outer peripheral wall portion 41. The first V-phase bridging wire portion 49-V1 is positioned along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulating frame 25. Furthermore, the first V-phase bridging wire portion 49-V1 passes through the gap 44 and is introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, thereby connecting with the first V-phase winding 46-V1 wound on the eighth stator core tooth portion 32-8.

[0054] Furthermore, the V-phase power line 48-V includes a second V-phase jumper portion 49-V2, which is a portion of the first V-phase winding 46-V1 that passes through a gap 44 from the inner peripheral side of the outer peripheral wall portion 41 of the lower insulating frame 25 to the outer peripheral side of the outer peripheral wall portion 41. The second V-phase jumper portion 49-V2 is arranged along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulating frame 25. In addition, the second V-phase jumper portion 49-V2 passes through the gap 44 and is introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, thereby connecting with the second V-phase winding 46-V2 wound on the second stator core tooth portion 32-2. Furthermore, the V-phase power line 48-V includes a V-phase neutral line 47-V that is led out from the second V-phase winding 46-V2 and electrically connected to the termination end E.

[0055] One end of the W-phase power line 48-W, serving as the starting end S, is positioned on the guide side of the third stator core tooth portion 32-3. The other end of the W-phase power line 48-W is electrically connected to the third W-phase winding 46-W3 wound on the third stator core tooth portion 32-3. The W-phase power line 48-W includes a first W-phase jumper portion 49-W1, which is a portion of the third W-phase winding 46-W3 that passes through a gap 44 from the inner peripheral side of the outer peripheral wall portion 41 of the lower insulating frame 25 to the outer peripheral side of the outer peripheral wall portion 41. The first W-phase jumper portion 49-W1 is positioned along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulating frame 25. Furthermore, the first W-phase jumper portion 49-W1 passes through the gap 44 and is introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, thereby connecting with the first W-phase winding 46-W1 wound on the sixth stator core tooth portion 32-6.

[0056] Furthermore, the W-phase power line 48-W includes a second W-phase jumper portion 49-W2, which is a portion of the first W-phase winding 46-W1 that passes through a gap 44 from the inner peripheral side of the outer peripheral wall portion 41 of the lower insulating frame 25 to the outer peripheral side of the outer peripheral wall portion 41. The second W-phase jumper portion 49-W2 is arranged along the outer peripheral surface of the outer peripheral wall portion 41 of the lower insulating frame 25. In addition, the second W-phase jumper portion 49-W2 passes through the gap 44 and is introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, thereby connecting with the second W-phase winding 46-W2 wound on the ninth stator core teeth 32-9. Furthermore, the W-phase power line 48-W includes a W-phase neutral line 47-W that is led out from the second W-phase winding 46-W2 and electrically connected to the termination end E.

[0057] Figure 7 This is a wiring diagram showing the connection state of the winding lines 46 of each phase in the embodiment. The three-phase motor of the embodiment is a motor having a star connection in which the winding lines 46 are connected in series. Figure 7 In the text, the winding portion 45, which forms nine tooth grooves, is also marked with... Figure 5 and Figure 6The corresponding symbols from 1 to 9. For example... Figure 7 As shown, the stator 22 has a neutral point 51. The U-phase neutral line 47-U, the V-phase neutral line 47-V, and the W-phase neutral line 47-W are electrically connected to the neutral point 51.

[0058] Stator manufacturing method

[0059] Here, we will illustrate the case of using a winding machine with three lead-out nozzles that operate synchronously to wind the winding wire 46 to manufacture the stator 22. By using a winding machine with synchronized operation of the three lead-out nozzles, the U-phase conductor, V-phase conductor, and W-phase conductor are simultaneously wound onto the stator core 23, which is equipped with an upper insulating frame 24 and a lower insulating frame 25, in a preset winding pattern, thereby simultaneously forming one winding section 45 for each phase, totaling three winding sections 45. By forming the winding sections 45 in this manner, three winding sections 45 are formed, resulting in a total of nine winding sections 45, thus manufacturing the stator 22. For example, enameled wire (copper wire coated with an enamel film) is used as the conductor for the winding wire 46.

[0060] The three-outlet winding machine has outlets for U-phase conductors, V-phase conductors, and W-phase conductors. The machine is symmetrical about the central axis C, with one outlet every 120° around the C. The machine moves these three outlets (V-phase, W-phase, and U-phase) synchronously and symmetrically about the central axis C. Moving the U-phase outlet causes it to perform a preset action, winding the U-phase conductor into a preset position within the stator core 23. Similarly, moving the V-phase outlet causes it to perform a preset action, winding the V-phase conductor into a preset position within the stator core 23. Moving the W-phase outlet causes it to perform a preset action, winding the W-phase conductor into a preset position within the stator core 23.

[0061] First, a stator core 23 is configured in the winding machine. An upper insulating frame 24, a lower insulating frame 25, and an insulating film (not shown) are mounted on the stator core 23. The winding machine moves the outlet nozzle for the U-phase conductor, positioning one end (starting end S) of the U-phase conductor on the guide side of the first stator core tooth 32-1, so that it extends from the starting end S as the U-phase power line 48-U. Simultaneously, the winding machine moves the outlet nozzle for the V-phase conductor, positioning one end (starting end S) of the V-phase conductor on the guide side of the fifth stator core tooth 32-5, so that it extends from the starting end S as the V-phase power line 48-V. Similarly, the winding machine moves the outlet nozzle for the W-phase conductor, positioning one end (starting end S) of the W-phase conductor on the guide side of the third stator core tooth 32-3, so that it extends from the starting end S as the W-phase power line 48-W.

[0062] The winding machine forms the third U-phase winding 46-U3 by counterclockwise winding the U-phase conductor extending from the starting end S onto the first stator core tooth section 32-1. At the same time, the winding machine moves the V-phase conductor outlet nozzle and the U-phase conductor outlet nozzle synchronously, thereby winding the V-phase conductor extending from the starting end S counterclockwise onto the fifth stator core tooth section 32-5, forming the third V-phase winding 46-V3. The winding machine also moves the W-phase conductor outlet nozzle and the U-phase conductor outlet nozzle synchronously, thereby winding the W-phase conductor extending from the starting end S counterclockwise onto the third stator core tooth section 32-3, forming the third W-phase winding 46-W3.

[0063] Next, the winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor extending from the third U-phase winding 46-U3 to pass through the gap 44 in the outer peripheral wall portion 41. The U-phase conductor, drawn from the inner peripheral side of the outer peripheral wall portion 41 to the outer peripheral side, extends along the outer peripheral surface of the outer peripheral wall portion 41, thereby forming the first U-phase jumper portion 49-U1 from the U-phase conductor. Then, the winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor extending from the first U-phase jumper portion 49-U1 to pass through the gap 44. The U-phase conductor, introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, is wound counterclockwise around the fourth stator core tooth portion 32-4, thereby forming the first U-phase winding 46-U1 from the U-phase conductor.

[0064] At this time, the first V-phase bridging section 49-V1 is formed by the V-phase conductor extending from the third V-phase winding line 46-V3, and the first W-phase bridging section 49-W1 is formed by the W-phase conductor extending from the third W-phase winding line 46-W3. Similarly, the three-outlet winding machine moves the V-phase conductor outlet and the U-phase conductor outlet synchronously, causing the V-phase conductor extending from the first V-phase bridging section 49-V1 to pass through the gap 44 and be wound counterclockwise onto the eighth stator core tooth section 32-8, thereby forming the first V-phase winding line 46-V1 from the V-phase conductor. The winding machine moves the W-phase conductor outlet and the U-phase conductor outlet synchronously, causing the W-phase conductor extending from the first W-phase bridging section 49-W1 to pass through the gap 44 and be wound counterclockwise onto the sixth stator core tooth section 32-6, thereby forming the first W-phase winding line 46-W1 from the W-phase conductor.

[0065] Next, the winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor extending from the first U-phase winding 46-U1 to pass through the gap 44 in the outer peripheral wall portion 41. The U-phase conductor, drawn from the inner peripheral side of the outer peripheral wall portion 41 to the outer peripheral side, extends along the outer peripheral surface of the outer peripheral wall portion 41, thereby forming the second U-phase jumper portion 49-U2 from the U-phase conductor. Next, the winding machine moves the U-phase conductor outlet nozzle, causing the U-phase conductor extending from the second U-phase jumper portion 49-U2 to pass through the gap 44. The U-phase conductor, introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, is wound counterclockwise around the seventh stator core tooth portion 32-7, thereby forming the second U-phase winding 46-U2 from the U-phase conductor.

[0066] At this time, the winding machine moves synchronously with the V-phase conductor outlet, the W-phase conductor outlet, and the U-phase conductor outlet, thereby forming the second V-phase bridging section 49-V2 from the V-phase conductor extending from the first V-phase winding line 46-V1, and simultaneously forming the second W-phase bridging section 49-W2 from the W-phase conductor extending from the first W-phase winding line 46-W1. Similarly, the winding machine moves synchronously with the V-phase conductor outlet and the U-phase conductor outlet, causing the V-phase conductor extending from the second V-phase bridging section 49-V2 to pass through the gap 44 and be wound counterclockwise around the second stator core teeth 32-2, thereby forming the second V-phase winding line 46-V2 from the V-phase conductor. The winding machine moves the outlet nozzles for the W-phase conductor and the U-phase conductor synchronously, causing the W-phase conductor extending from the second W-phase jumper section 49-W2 to pass through the gap 44 and be wound counterclockwise around the ninth stator core teeth 32-9, thereby forming the second W-phase winding 46-W2 from the W-phase conductor.

[0067] The stator 22 is manufactured in the manner described above. The first U-phase jumper portion 49-U1, the second U-phase jumper portion 49-U2, the first V-phase jumper portion 49-V1, the second V-phase jumper portion 49-V2, the first W-phase jumper portion 49-W1, and the second W-phase jumper portion 49-W2, respectively mounted on the outer peripheral surface of the outer peripheral wall portion 41, are circumferentially positioned relative to the outer peripheral wall portion 41. Figure 6 The jumper wires are tilted to the right and spaced apart on the outer circumference. This ensures a greater insulation distance between the jumper wires 49 of each phase compared to when the jumper wires are horizontally mounted relative to the central axis C.

[0068] Finally, the winding machine moves the outlet nozzle for the U-phase conductor to position the other end, the termination end E, of the U-phase conductor on the guide side of the seventh stator core tooth section 32-7, thereby forming the U-phase neutral line 47-U. At this time, the winding machine synchronously moves the outlet nozzles for the V-phase conductor and the W-phase conductor with the outlet nozzle for the U-phase conductor, positioning the other end, the termination end E, of the V-phase conductor on the guide side of the second stator core tooth section 32-2 to form the V-phase neutral line 47-V, and simultaneously positioning the other end, the termination end E, of the W-phase conductor on the guide side of the ninth stator core tooth section 32-9 to form the W-phase neutral line 47-W. Furthermore, the ends of the U-phase neutral line 47-U, the V-phase neutral line 47-V, and the W-phase neutral line 47-W are electrically connected via connectors (not shown).

[0069] The above description explains the case of winding the winding wire 46 using a winding machine with three exit nozzles. However, the winding wire 46 can also be wound using a winding machine with only one exit nozzle. In this case, the U-phase conductor, V-phase conductor, and W-phase conductor are wound one phase at a time in a preset order, thereby forming a three-phase winding section 45 phase by phase. By forming the three-phase winding section 45 in the above manner, the stator 22 is manufactured.

[0070] compressor operation

[0071] The compressor 1 is configured as a structural element of a refrigeration cycle device (not shown) to compress the refrigerant, causing it to circulate in the refrigerant circuit of the refrigeration cycle device. The three-phase motor 6 generates a rotating magnetic field by applying three-phase voltages to multiple U-phase power lines 48-U1 to 48-U3, multiple V-phase power lines 48-V1 to 48-V3, and multiple W-phase power lines 48-W1 to 48-W3 respectively. The rotor 21 rotates according to the rotating magnetic field generated by the stator 22. The rotation of the rotor 21 by the three-phase motor 6 causes the rotating shaft 3 to rotate.

[0072] By rotating the rotating shaft 3, the compression unit 5 introduces low-pressure refrigerant gas through the inlet pipe 11 and compresses the introduced low-pressure refrigerant gas to generate high-pressure refrigerant gas, which is then supplied to the upper silencing chamber 16 and the lower silencing chamber 17. The lower silencing cover 15 reduces the pressure pulsation of the high-pressure refrigerant gas supplied to the lower silencing chamber 17 and supplies the high-pressure refrigerant gas with reduced pressure pulsation to the upper silencing chamber 16. The upper silencing cover 14 reduces the pressure pulsation of the high-pressure refrigerant gas supplied to the upper silencing chamber 16 and supplies the high-pressure refrigerant gas with reduced pressure pulsation to the space between the compression unit 5 and the three-phase motor 6 in the internal space 7 through the compressed refrigerant discharge port 18.

[0073] The high-pressure refrigerant gas supplied to the space between the compressor section 5 and the three-phase motor 6 in the internal space 7 flows through the gap formed in the three-phase motor 6 and is supplied to the space above the three-phase motor 6 in the internal space 7. The refrigerant supplied to the space above the three-phase motor 6 in the internal space 7 is discharged through the discharge pipe 12 to the device on the downstream side of the compressor 1 arranged in the refrigeration cycle device.

[0074] Characteristic structure of a three-phase electric motor

[0075] Next, the characteristic structure of the three-phase motor 6 of the embodiment will be described. This embodiment features a structure in which multiple slits 44 are formed in the outer peripheral wall portion 41 of the lower insulating frame 25. Hereinafter, the lower insulating frame 25 will be described, but the upper insulating frame 24 will be described similarly.

[0076] In order to enable the winding wire 46 to be wound with the three-outlet winding as described above, and to ensure that the winding wires 46 of each phase are wound properly without crossing each other even when the winding wire 46 is wound with a single-outlet winding, in the lower insulation frame 25 of the embodiment, a portion of the plurality of slits 44 has a structure for the winding wire 46 to selectively pass through in the case of three-outlet winding and single-outlet winding.

[0077] like Figure 4 and Figure 6 As shown, a first connecting gap 55, a second connecting gap 56, and a third connecting gap 57 are formed on the outer peripheral wall portion 41 of the lower insulating frame 25. The first connecting gap 55, the second connecting gap 56, and the third connecting gap 57 are formed by connecting two adjacent gaps 44 in the circumferential direction of the outer peripheral wall portion 41 among a plurality of gaps 44.

[0078] The first connecting gap 55 has a stepped portion 58, forming two gaps 44 (44A, 44B) of different depths extending from one end 41a of the outer peripheral wall portion 41 along the central axis C of the outer peripheral wall portion 41. Similarly, in the second connecting gap 56, two gaps 44 (44C, 44D) of different depths are connected, thus forming a stepped portion 58. In the third connecting gap 57, two gaps 44 (44E, 44F) of different depths are connected, thus forming a stepped portion 58. Furthermore, each connecting gap only needs to be two gaps 44, 44 of different depths connected circumferentially along the central axis C. For example, a hook portion for the winding wire 46 can be formed between the two gaps 44, 44 that form a connecting gap, protruding towards the reverse guide side.

[0079] By selectively passing through one of the two gaps 44 (44A, 44B) in the first connecting gap 55 according to the single-outlet and triple-outlet winding methods described above, the winding wire 46 is laid along the outer peripheral surface of the outer peripheral wall portion 41. Similarly, at the second connecting gap 56, the winding wire 46 selectively passes through one of the two gaps 44 (44C, 44D). Similarly, at the third connecting gap 57, the winding wire 46 selectively passes through one of the two gaps 44 (44E, 44F). That is, one of the two gaps 44 in each connecting gap is used for the winding wire 46 to pass through during single-outlet winding, and the other gap is used for the winding wire 46 to pass through during triple-outlet winding.

[0080] Furthermore, in the outer peripheral wall portion 41, the first connecting gap 55 and the second connecting gap 56 are formed adjacent to each other in the circumferential direction of the outer peripheral wall portion 41. The first connecting gap 55 has a first gap 44A and a second gap 44B with a depth less than that of the first gap 44A. The second connecting gap 56 has a third gap 44C and a fourth gap 44D with a depth greater than that of the third gap 44C.

[0081] The depth of the first slit 44A is greater than the depth of the third slit 44C (see [reference]). Figure 8 The depth of the second slit 44B is less than the depth of the fourth slit 44D. Furthermore, the depth of the third slit 44C is less than the depth of the second slit 44B. The depth of the fourth slit 44D is less than the depth of the first slit 44A.

[0082] Furthermore, in the outer peripheral wall portion 41, a first connecting slot 55 and a second connecting slot 56 are sequentially formed in one circumferential direction of the outer peripheral wall portion 41, i.e., from the left end to the right end in the figure. In other words, in the circumferential direction of the outer peripheral wall portion 41, the first connecting slot 55 is located near the first insulating frame tooth portion 42-1, and the second connecting slot 56 is located near the second insulating frame tooth portion 42-2. Therefore, in the outer peripheral wall portion 41, a first slot 44A, a second slot 44B, a third slot 44C, and a fourth slot 44D are sequentially formed in one of the aforementioned directions. Thus, as described later, the positional relationship between the first U-phase jumper portion 49-U1 and the second V-phase jumper portion 49-V2 can be interchanged when the three-outlet coil is wound and when the single-outlet coil is wound.

[0083] In addition, such as Figure 6 As shown, along the aforementioned direction of the circumference of the outer peripheral wall portion 41, the first slit 44A, the second slit 44B, and the third slit 44C are formed such that their depths decrease sequentially (see [reference]). Figure 8 Therefore, the jumper portions 49 of the winding wires 46 can be spaced apart in the vertical direction (axial direction of the rotating shaft 3) of the outer peripheral wall portion 41, thereby ensuring the insulation distance between the winding wires 46 of each phase.

[0084] Furthermore, the first insulating frame tooth 42-1 of the lower insulating frame 25 is provided with a winding portion 45 (first stator core tooth 32-1), which is adjacent to the starting end S side of the U-phase power line 48-U connected to the third U-phase winding line 46-U3. In the circumferential direction of the outer peripheral wall portion 41, in the first connecting gap 55, a first gap 44A is formed on the side near the first insulating frame tooth 42-1, and a second gap 44B is formed on the side away from the first insulating frame tooth 42-1. In this configuration, the first U-phase jumper portion 49-U1 starts from the third U-phase winding line 46-U3 and extends from the first insulating frame tooth 42-1 toward the second insulating frame tooth 42-2 in the aforementioned direction.

[0085] Furthermore, by making the depth of the first gap 44A greater than the depth of the second gap 44B as described above, it is possible to suppress the movement of the first U-phase jumper portion 49-U1 passing through the first gap 44A to the second gap 44B. This suppresses the movement or loosening of the winding wires 46 mounted on the outer peripheral wall portion 41, thereby improving the reliability of the insulation state between the winding wires 46 of each phase. In other words, if the depths of the first gap 44A and the second gap 44B are opposite to those described above, i.e., if the depth of the first gap 44A is less than the depth of the second gap 44B, the first U-phase jumper portion 49-U1 passing through the first gap 44A is more likely to move from the shallower first gap 44A to the deeper second gap 44B, which is less than ideal.

[0086] Furthermore, the second insulating frame tooth 42-2 of the lower insulating frame 25 is provided with a winding portion 45 (second stator core tooth 32-2), which is adjacent to the termination end E side of the V-phase neutral line 47-V, which is a power supply line connected to the second V-phase winding line 46-V2. In the circumferential direction of the outer peripheral wall portion 41, a third gap 44C is formed on the side of the second connecting gap 56 near the second insulating frame tooth 42-2, and a fourth gap 44D is formed on the side away from the second insulating frame tooth 42-2. In this configuration, the second V-phase jumper portion 49-V2 extends from the first insulating frame tooth 42-1 toward the second insulating frame tooth 42-2 in one of the aforementioned directions to the second V-phase winding line 46-V2.

[0087] Furthermore, by making the depth of the fourth slit 44D greater than the depth of the third slit 44C as described above, in the case of single-outlet coil winding described later (see... Figure 9 and Figure 10 This design effectively prevents the second V-phase jumper portion 49-V2, which passes through the fourth gap 44D, from moving to the third gap 44C. This suppresses movement or loosening of the winding wires 46 mounted on the outer peripheral wall portion 41, thereby improving the reliability of the insulation state between the winding wires 46 of each phase. In other words, if the depths of the third gap 44C and the fourth gap 44D are opposite to those described above—that is, if the depth of the fourth gap 44D is less than the depth of the third gap 44C—the second V-phase jumper portion 49-V2 passing through the fourth gap 44D can easily move from the shallower fourth gap 44D to the deeper third gap 44C, which is less than ideal.

[0088] Furthermore, the third connecting gap 57 is disposed near the eighth insulating frame tooth portion 42-8. Similar in shape to the first connecting gap 55, the third connecting gap 57 has a fifth gap 44E and a sixth gap 44F with a depth less than the fifth gap 44E. In the outer peripheral wall portion 41, the fifth gap 44E and the sixth gap 44F are sequentially formed in one of the aforementioned directions.

[0089] The main part of the winding wire under the three-outlet nozzle

[0090] Figure 8 This is an enlarged view showing the winding wire 46 wound around the main part of the lower insulating frame 25 in the embodiment, via a three-outlet winding system. (See diagram below.) Figure 6 and Figure 8 As shown, in the case of three-outlet winding, the first U-phase jumper portion 49-U1, led from the third U-phase winding line 46-U3, passes through the first gap 44A of the first connection gap 55 and is mounted along the outer peripheral surface of the outer peripheral wall portion 41. Furthermore, from the first V-phase winding line 46-V1 ( Figure 6The second V-phase jumper portion 49-V2, which extends out and is mounted on the outer peripheral surface of the outer peripheral wall portion 41, passes through the third gap 44C of the second connection gap 56 and is wound around the second V-phase winding wire 46-V2.

[0091] In the case of winding with three outlets like this, the first gap 44A of the first connecting gap 55 and the third gap 44C of the second connecting gap 56 are used, but the second gap 44B of the first connecting gap 55 and the fourth gap 44D of the second connecting gap 56 are not used.

[0092] In addition, such as Figure 6 As shown, in the case of three-outlet winding, the second V-phase jumper portion 49-V2, which is led out from the first V-phase winding wire 46-V1, passes through the sixth slot 44F of the third connecting slot 57 and is mounted along the outer peripheral surface of the outer peripheral wall portion 41. Therefore, in the case of three-outlet winding, the sixth slot 44F in the third connecting slot 57 is used, while the fifth slot 44E is not used. When the three-outlet winding is performed, the second V-phase jumper portion 49-V2 passes through the sixth slot 44F, thereby reducing the amount of displacement of the second V-phase jumper portion 49-V2 extending to the third slot 44C in the vertical direction (axial direction of the rotation axis 3) of the outer peripheral wall portion 41, thus allowing the second V-phase jumper portion 49-V2 to be smoothly mounted toward the position of the third slot 44C.

[0093] The main part of the winding wire under the single lead-out nozzle

[0094] Figure 9 This is a diagram showing the unfolded view of the winding wires 46 of each phase wound by the lower insulating frame 25 of the embodiment, which are wound by a single lead-out nozzle. Figure 10 This is an enlarged view showing the winding wire 46 wound around the main part of the lower insulating frame 25 of the embodiment via a single lead-out nozzle. Figure 9 and Figure 10 The diagram shows an example of how the winding lines 46 of each phase are wound in the order of V phase, W phase, and U phase.

[0095] When winding with a single lead-out nozzle, a winding machine with one lead-out nozzle is used to wind the conductors of each of the three phases (V phase, W phase, U phase) sequentially one phase at a time onto the lower insulation frame 25. When winding the winding wires 46 to manufacture the stator 22 by winding with a single lead-out nozzle, the winding wires 46 of each phase are wound in the same manner as the winding with three lead-out nozzles described above, except that the following two points are excluded: the adjacent two gaps (44A and 44B, 44C and 44D, 44E and 44F) of the first connection gap 55, the second connection gap 56 and the third connection gap 57 are selectively used in different ways, and the winding wires 46 of each phase are wound sequentially one phase at a time instead of simultaneously.

[0096] Here, refer to Figure 9 The manufacturing method of the stator 22, in which the winding wire 46 is wound using a single-outlet winding machine with only one outlet, will be explained using the case where the conductors of each phase are wound in the order of V phase, W phase, and U phase as an example. The parts common to the case of three-outlet winding are omitted.

[0097] First, the V-phase conductor, which is wound first among the three phases, will be explained. A single-outlet winding machine moves one outlet to position one end of the V-phase conductor, the starting end S, on the guide side of the fifth stator core tooth 32-5, allowing it to extend from the starting end S as the V-phase power line 48-V. The winding machine winds the V-phase conductor extending from the starting end S counterclockwise around the fifth stator core tooth 32-5, forming the third V-phase winding 46-V3. Next, the winding machine moves the outlet to allow the V-phase conductor extending from the third V-phase winding 46-V3 to pass through the gap 44 of the outer peripheral wall 41. The V-phase conductor, drawn from the inner peripheral side to the outer peripheral side of the outer peripheral wall 41, extends along the outer peripheral surface of the outer peripheral wall 41, thus forming the first V-phase jumper portion 49-V1. Next, the winding machine moves the lead outlet, so that the V-phase conductor extending from the first V-phase jumper section 49-V1 passes through the gap 44, and the V-phase conductor introduced from the outer peripheral side of the outer peripheral wall section 41 into the inner peripheral side is wound counterclockwise around the eighth stator core tooth section 32-8, thereby forming the first V-phase winding line 46-V1 from the V-phase conductor.

[0098] Next, the winding machine moves the lead-out nozzle, causing the V-phase conductor extending from the first V-phase winding 46-V1 to pass through the fifth slot 44E in the third connecting slot 57 of the outer peripheral wall portion 41. This allows the V-phase conductor, drawn from the inner peripheral side to the outer peripheral side of the outer peripheral wall portion 41, to extend along the outer peripheral surface of the outer peripheral wall portion 41, thereby forming the second V-phase jumper portion 49-V2 from the V-phase conductor. Then, the winding machine moves the lead-out nozzle, causing the V-phase conductor extending from the second V-phase jumper portion 49-V2 to pass through the fourth slot 44D in the second connecting slot 56. This allows the V-phase conductor, introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, to be wound counterclockwise around the second stator core tooth portion 32-2, thereby forming the second V-phase winding 46-V2 from the V-phase conductor. Finally, the winding machine moves the lead-out nozzle to position the other end of the V-phase conductor, i.e. the termination end E, on the guide side of the second stator core tooth 32-2, thereby forming the V-phase neutral line 47-V.

[0099] For the W-phase conductor wound after the V-phase conductor in the three-phase system, the winding is also performed in the same steps as the V-phase conductor by moving one of the lead-out nozzles. Detailed instructions on the winding method for the W-phase conductor are omitted here.

[0100] Finally, the last U-phase conductor wound in the three-phase winding process will be explained. The single-outlet winding machine moves one outlet to position one end of the U-phase conductor, the starting end S, on the guide side of the first stator core tooth section 32-1, allowing it to extend from the starting end S as the U-phase power line 48-U. The winding machine winds the U-phase conductor extending from the starting end S counterclockwise around the first stator core tooth section 32-1, forming the third U-phase winding line 46-U3. Next, the winding machine moves the outlet to allow the U-phase conductor extending from the third U-phase winding line 46-U3 to pass through the second gap 44B in the first connecting gap 55 of the outer peripheral wall section 41. This allows the U-phase conductor, leading from the inner peripheral side to the outer peripheral side of the outer peripheral wall section 41, to extend along the outer peripheral surface of the outer peripheral wall section 41, thereby forming the first U-phase jumper portion 49-U1. Next, the winding machine moves the lead outlet, so that the U-phase conductor extending from the first U-phase jumper section 49-U1 passes through the gap 44, and the U-phase conductor introduced from the outer peripheral side of the outer peripheral wall section 41 is wound counterclockwise around the fourth stator core tooth section 32-4, thereby forming the first U-phase winding line 46-U1 from the U-phase conductor.

[0101] Next, the winding machine moves the lead-out nozzle, allowing the U-phase conductor extending from the first U-phase winding 46-U1 to pass through the gap 44 in the outer peripheral wall portion 41. The U-phase conductor, drawn from the inner peripheral side of the outer peripheral wall portion 41 to the outer peripheral side, extends along the outer peripheral surface of the outer peripheral wall portion 41, thus forming the second U-phase jumper portion 49-U2. Next, the winding machine moves the lead-out nozzle, allowing the U-phase conductor extending from the second U-phase jumper portion 49-U2 to pass through the gap 44. The U-phase conductor, introduced from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side, is wound counterclockwise around the seventh stator core tooth portion 32-7, thus forming the second U-phase winding 46-U2. Finally, the winding machine moves the lead-out nozzle to position the other end of the U-phase conductor, the termination end E, on the guide side of the seventh stator core tooth portion 32-7, thereby forming the U-phase neutral line 47-U.

[0102] In this embodiment, the winding of a single-outlet nozzle is the same as that of a three-outlet nozzle, such as... Figure 9 As shown, the jumper wires 49 of the three phases are installed along the outer peripheral surface of the outer peripheral wall 41 of the lower insulation frame 25 without crossing each other, ensuring the insulation distance between the jumper wires 49. Furthermore, when replacing the winding wires 46 of each phase (V, W, and U), by changing the order in which the winding wires of each phase are wound during single-outlet winding, it is also possible to ensure that the jumper wires 49 of each phase do not cross each other, thereby ensuring the insulation distance between the jumper wires 49.

[0103] like Figure 9 and Figure 10As shown, when the winding wire 46 is wound in the order of V phase, W phase, and U phase through a single lead-out nozzle, among the V phase conductors wound first in the three-phase winding wires 46, from the first V phase winding wire 46-V1 ( Figure 9 The second V-phase jumper portion 49-V2, extending and mounted on the outer peripheral surface of the outer peripheral wall portion 41, passes through the fourth gap 44D of the second connection gap 56 and is wound around the second V-phase winding wire 46-V2. Furthermore, in the last U-phase conductor wound in the three-phase winding wires 46, the first U-phase jumper portion 49-U1, leading from the third U-phase winding wire 46-U3, passes through the second gap 44B of the first connection gap 55 and is mounted along the outer peripheral surface of the outer peripheral wall portion 41.

[0104] Therefore, in comparison Figure 8 and Figure 10 (or Figure 6 and Figure 9 In the three-outlet winding and single-outlet winding processes, the positional relationship of the first U-phase jumper portion 49-U1 and the second V-phase jumper portion 49-V2 in the vertical direction (axial direction of the rotation shaft 3) of the outer peripheral wall portion 41 is reversed. This is because, as described above, since the depth of the first gap 44A is greater than the depth of the third gap 44C, and the depth of the second gap 44B is less than the depth of the fourth gap 44D, the positional relationship of the first U-phase jumper portion 49-U1 and the second V-phase jumper portion 49-V2 can be interchanged between the three-outlet winding and single-outlet winding processes. Therefore, when the stator 22 is manufactured by single-outlet winding, the first U-phase jumper portion 49-U1 of the U-phase winding line 46 wound after the V-phase can be positioned above (on the reverse guide side) the second V-phase jumper portion 49-V2 of the V-phase winding line 46, thus avoiding the situation described above. Figure 13 As shown in the conventional insulating frame 101, the first U-phase jumper portion 49-U1 and the second V-phase jumper portion 49-V2 cross when the single outlet is wound.

[0105] In the case of single-outlet coil winding, the second gap 44B is selectively used in the first connection gap 55, and the fourth gap 44D is selectively used in the second connection gap 56, instead of using the first gap 44A of the first connection gap 55 and the third gap 44C of the second connection gap 56 used in the case of triple-outlet coil winding.

[0106] That is, in this embodiment, one of the two gaps 44 (44A, 44B) of the first connecting gap 55, namely the second gap 44B, is used as the gap through which the winding wire 46 passes when winding with a single lead-out nozzle, and the other gap, namely the first gap 44A, is used as the gap through which the winding wire 46 passes when winding with a triple lead-out nozzle. Similarly, one of the two gaps 44 (44C, 44D) of the second connecting gap 56, namely the fourth gap 44D, is used as the gap through which the winding wire 46 passes when winding with a single lead-out nozzle, and the other gap, namely the third gap 44C, is used as the gap through which the winding wire 46 passes when winding with a triple lead-out nozzle.

[0107] In addition, such as Figure 9 As shown, in this embodiment, when wound with a single lead-out nozzle, the second V-phase jumper portion 49-V2, led from the first V-phase winding wire 46-V1, passes through the fifth slot 44E of the third connecting slot 57 and is mounted along the outer peripheral surface of the outer peripheral wall portion 41. Therefore, in the case of winding with a single lead-out nozzle, the fifth slot 44E in the third connecting slot 57 is selectively used, while the sixth slot 44F is not used. When wound with a single lead-out nozzle, the second V-phase jumper portion 49-V2 passes through the fifth slot 44E, thereby reducing the amount of displacement of the second V-phase jumper portion 49-V2 extending to the fourth slot 44D in the vertical direction (axial direction of the rotation axis 3) of the outer peripheral wall portion 41, thus allowing the second V-phase jumper portion 49-V2 to be smoothly mounted toward the position of the fourth slot 44D. Furthermore, when winding with a single lead tip, the second V-phase jumper portion 49-V2 can be passed through the sixth gap 44F of the third connecting gap 57, just as when winding with a three-lead lead tip. In this case, the second V-phase jumper portion 49-V2 can also be placed in the fourth gap 44D of the second connecting gap 56. However, if the second V-phase jumper portion 49-V2, which serves as the winding wire 46, is placed at a downward (guide side) angle, it will make it more difficult to pass the winding wire 46 through the fourth gap 44D from the outer peripheral side of the outer peripheral wall portion 41 to the inner peripheral side.

[0108] As described above, in this embodiment, even if it is necessary to switch between three-outlet winding and single-outlet winding in the manufacturing process of stator 22, the lower insulating frame 25 (upper insulating frame 24) can be universalized between three-outlet winding and single-outlet winding by selectively using any one of the first gap 44A and the second gap 44B and any one of the third gap 44C and the fourth gap 44D.

[0109] Figure 11 This is an enlarged view showing a modified example of the main part of the lower insulating frame 25 in the embodiment. (See attached image.) Figure 11As shown, a first hook portion 59A for hooking the winding wire 46 is formed in the first connecting gap 55. The first hook portion 59A is formed such that, within the second gap 44B, its depth increases from the side of the first gap 44A toward the side opposite to the side of the first gap 44A. Furthermore, a second hook portion 59B for hooking the winding wire 46 is formed in the second connecting gap 56. The second hook portion 59B is formed such that, within the third gap 44C, its depth increases from the side of the fourth gap 44D toward the side opposite to the side of the fourth gap 44D.

[0110] The first hook portion 59A and the second hook portion 59B are formed by tilting the upper end of the stepped portion 58 downward in the circumferential direction relative to the outer peripheral wall portion 41. Furthermore, the first hook portion 59A and the second hook portion 59B are not limited to the shapes described above; for example, a recess (not shown) may be formed at the upper end of the stepped portion 58. Additionally, although not shown, a hook portion may also be formed within the sixth gap 44F of the third connecting gap 57.

[0111] Therefore, in the first connection gap 55, since the winding wire 46 passing through the second gap 44B is properly hooked onto the second gap 44B via the hook portion, movement of the winding wire 46 from the second gap 44B to the first gap 44A is suppressed. Similarly, in the second connection gap 56, since the winding wire 46 passing through the third gap 44C is properly hooked onto the third gap 44C via the hook portion, movement of the winding wire 46 from the third gap 44C to the fourth gap 44D is suppressed. As a result, movement or loosening of the winding wire 46 mounted on the outer peripheral wall portion 41 is suppressed, thus improving the reliability of the insulation state between the winding wires 46 of each phase.

[0112] Effects of the Implementation Examples

[0113] As described above, in the outer peripheral wall portion 41 of the lower insulating frame 25 (upper insulating frame 24) of the three-phase motor 6 in the embodiment, a first connecting gap 55 is formed by connecting two gaps (first gap 44A and second gap 44B) that are adjacent in the circumferential direction of the outer peripheral wall portion 41 among a plurality of gaps 44. The first connecting gap 55 is provided with a stepped portion 58 because the first gap 44A and the second gap 44B, which extend from one end of the outer peripheral wall portion 41 at different depths, are connected. Similarly, in the outer peripheral wall portion 41, a second connecting gap 56 is formed by connecting two gaps (third gap 44C and fourth gap 44D) that are adjacent in the circumferential direction of the outer peripheral wall portion 41. The second connecting gap 56 is provided with a stepped portion 58 because the third gap 44C and the fourth gap 44D, which extend from one end of the outer peripheral wall portion 41 at different depths, are connected. The winding wire 46 selectively passes through either of the two slits (first slit 44A and second slit 44B) of the first connecting slit 55, thereby laying the winding wire 46 along the outer peripheral wall portion 41. Similarly, the winding wire 46 selectively passes through either of the two slits (third slit 44C and fourth slit 44D) of the second connecting slit 56, thereby laying the winding wire 46 along the outer peripheral wall portion 41. In this way, by selectively using either of the two slits 44 of each connecting slit, the lower insulating frame 25 (upper insulating frame 24) used to form the three-phase winding portion 45 can be used for both single-outlet winding and three-outlet winding. As a result, by standardizing the molding die and avoiding misuse of the insulating frame, the arrangement of the manufacturing process of the three-phase motor 6 can be simplified, and the manufacturing cost of the three-phase motor 6 can be reduced. Furthermore, it can also properly ensure the insulation distance between the windings 46 of each phase mounted on the outer peripheral wall 41.

[0114] Furthermore, in the lower insulating frame 25 (upper insulating frame 24) of the embodiment, the first connecting gap 55 has a first gap 44A and a second gap 44B with a depth less than that of the first gap 44A. The second connecting gap 56 has a third gap 44C and a fourth gap 44D with a depth greater than that of the third gap 44C. The depth of the first gap 44A is greater than the depth of the third gap 44C, and the depth of the second gap 44B is less than the depth of the fourth gap 44D. In the outer peripheral wall portion 41, the first gap 44A, the second gap 44B, the third gap 44C, and the fourth gap 44D are sequentially formed in one direction circumferentially toward the outer peripheral wall portion 41. Therefore, the positional relationship between the first U-phase jumper portion 49-U1 and the second V-phase jumper portion 49-V2 can be switched when the three-outlet nozzle is wound and when the single-outlet nozzle is wound, thus avoiding the situation where the first U-phase jumper portion 49-U1 and the second V-phase jumper portion 49-V2 cross over when the single-outlet nozzle is wound, as is the case with the previous insulating frame 101.

[0115] Furthermore, in this embodiment, the outer peripheral wall 41 of the lower insulating frame 25 (upper insulating frame 24) has a first hook portion 59A and a second hook portion 59B for hooking the winding wire 46. The first hook portion 59A is formed such that the depth of the side opposite to the first gap 44A in the second gap 44B is greater than the depth of the side opposite to the first gap 44A. The second hook portion 59B is formed such that the depth of the side opposite to the fourth gap 44D in the third gap 44C is greater than the depth of the side opposite to the fourth gap 44D. Thus, the winding wire 46 is properly hooked in the second gap 44B, preventing the winding wire 46 from moving from the second gap 44B to the first gap 44A. Similarly, the winding wire 46 is properly hooked in the third gap 44C, preventing the winding wire 46 from moving from the third gap 44C to the fourth gap 44D. This suppresses the movement or loosening of the winding wires 46 mounted on the outer peripheral wall portion 41, thereby improving the reliability of the insulation state between the winding wires 46 of each phase.

[0116] Furthermore, in the first connecting gap 55 of the lower insulating frame 25 (upper insulating frame 24) of the embodiment, a first gap 44A is formed on the side near the first insulating frame tooth 42-1 in the circumferential direction of the outer peripheral wall portion 41, and a second gap 44B is formed on the side away from the first insulating frame tooth 42-1. The depth of the first gap 44A is greater than the depth of the second gap 44B. As a result, it is possible to suppress the movement of the first U-phase jumper portion 49-U1 passing through the first gap 44A to the second gap 44B. As a result, the movement or loosening of the winding wire 46 mounted on the outer peripheral wall portion 41 is suppressed, thereby improving the reliability of the insulation state between the winding wires 46 of each phase.

[0117] Furthermore, in the second connecting gap 56 of the lower insulating frame 25 (upper insulating frame 24) of the embodiment, a third gap 44C is formed on the side near the second insulating frame tooth 42-2 in the circumferential direction of the outer peripheral wall portion 41, and a fourth gap 44D is formed on the side away from the second insulating frame tooth 42-2. The depth of the fourth gap 44D is greater than the depth of the third gap 44C. As a result, it is possible to suppress the movement of the second V phase jumper portion 49-V2 through the fourth gap 44D to the third gap 44C when a single lead tip is wound. As a result, the movement or loosening of the winding wire 46 mounted on the outer peripheral wall portion 41 is suppressed, thereby improving the reliability of the insulation state between the winding wires 46 of each phase.

[0118] Furthermore, the three-phase motor in this embodiment is used in rotary compressors, but it can also be used in other compressors such as scroll compressors.

[0119] Symbol Explanation

[0120] 1. Compressor

[0121] 6 Three-phase motor

[0122] 21 Rotors

[0123] 22 Stator

[0124] 24. Insulation frame (insulation frame)

[0125] 25 Lower Insulation Frame (Insulation Frame)

[0126] 32 (32-1~32-9) Stator core teeth (teeth)

[0127] 41 Peripheral wall portion

[0128] 42 (42-1~42-9) Insulation frame tooth section (drum section)

[0129] 44 gaps

[0130] 44A First Gap

[0131] 44B Second Gap

[0132] 44C Third Gap

[0133] 44D Fourth Gap

[0134] 44E Fifth Gap

[0135] 44F Sixth Gap

[0136] 45. Winding section

[0137] 46 winding wires

[0138] 55 First connecting gap

[0139] 56 Second connection gap

[0140] 57 Third Connection Gap

[0141] 58 Steps

[0142] 59A First Hook Part

[0143] 59B Second Hook Part

[0144] C Central axis

[0145] E Termination

[0146] S starting end

Claims

1. An insulating frame applied to a three-phase electric motor and fixed at an end in the direction of the central axis of the stator, wherein a wound portion formed by winding wire is arranged circumferentially along the cylindrical stator in the three-phase electric motor, the insulating frame being characterized in that it comprises: The device includes a cylindrical outer peripheral wall portion and a winding portion, the winding portion being located on the inner periphery of the outer peripheral wall portion for winding the winding wire. The outer peripheral wall portion has multiple slits that extend from one end along the central axis of the outer peripheral wall portion to the other end, allowing the winding wires drawn from the winding portion to pass through. The outer peripheral wall portion has a connecting gap, which is connected by two adjacent gaps of different depths extending from one end to the other in the circumferential direction of the outer peripheral wall portion, thus forming a stepped portion. The connection gap includes: The first connecting gap and the second connecting gap formed adjacent to each other in the circumferential direction of the outer peripheral wall portion The first connecting gap has: a first gap, and a second gap with a depth less than the first gap. The second connecting gap has: a third gap, and a fourth gap with a depth greater than the third gap. In the outer peripheral wall portion, the first gap, the second gap, the third gap, and the fourth gap are sequentially formed in a circumferential direction towards the outer peripheral wall portion.

2. The insulating frame according to claim 1, characterized in that, In the case of a single-outlet winding structure, the winding wire passes through only one of the two gaps in the connecting gap; in the case of a three-outlet winding structure, the winding wire passes through only the other of the two gaps in the connecting gap.

3. The insulating frame according to claim 1, characterized in that, The depth of the first gap is greater than the depth of the third gap. The depth of the second gap is less than the depth of the fourth gap.

4. The insulating frame according to claim 1, characterized in that, In the case of a three-outlet winding structure, the winding wire passes through only the first and third gaps; in the case of a single-outlet winding structure, the winding wire passes through only the second and fourth gaps.

5. The insulating frame according to claim 1, characterized in that, The outer peripheral wall portion has at least one of a first hook portion and a second hook portion. The first hook portion is for the winding wire to hook and is formed in the second gap such that the depth of the side of the second gap opposite to the first gap side of the other end is greater than the depth of the first gap side of the other end. The second hook portion is for the winding wire to hook and is formed in the third gap such that the depth of the side of the third gap opposite to the fourth gap side of the other end is greater than the depth of the fourth gap side of the other end.

6. The insulating frame according to claim 1, characterized in that, In the first connecting gap, on the circumferential direction of the outer peripheral wall portion, the first gap is formed on the side near the drum portion for which the winding portion is disposed, and the second gap is formed on the side away from the drum portion. The winding portion is adjacent to the starting end of the power line connected to the winding wire. The depth of the first gap is greater than the depth of the second gap.

7. The insulating frame according to claim 1, characterized in that, In the second connecting gap, the third gap is formed on the side of the outer peripheral wall portion near the drum portion for which the winding portion is disposed, and the fourth gap is formed on the side away from the drum portion. The winding portion is adjacent to the termination end of the power line connected to the winding wire. The depth of the fourth slit is greater than the depth of the third slit.

8. The insulating frame according to claim 1, characterized in that, The number of the roller sections is 9 or more and is a multiple of 3.

9. An electric motor, characterized in that, have: The insulating frame, the stator, the rotor that rotates based on the magnetic field generated by the stator, and the winding wire for forming the three-phase winding portion, as described in any one of claims 1 to 8.

Images