JP2023058224A - Motor, compressor, and motor manufacturing method - Google Patents

Abstract

To provide a motor, a compressor, and a motor manufacturing method for facilitating manufacturing while reducing a load applied to a conductor.SOLUTION: A motor has a rotor and a stator. The stator includes: an annual yoke portion 31 surrounding an outer periphery of the rotor; a first teeth portion protruding from the yoke portion 31 toward the rotor; a first wiring wire 521 wound around the first teeth portion; a first connection wire 531 connecting to the first wiring wire 521; and a first slot film 261 that separates the yoke portion 31 and the first wiring wire 521 and separates the yoke portion 31 and the first connection 531. In the yoke portion 31, a first left side recessed groove 351 that is recessed radially outward from an inner peripheral surface 33 facing the first wiring wire 521 of the yoke portion 31 is formed so that a recessed inner groove space 71 in which the first connection wire 531 is arranged between the first wiring wire 521 and the yoke portion 31. The recessed inner groove space 71 is formed to have a size that allows the first connection wire 531 to move in the recessed groove inner space 71 in a circumferential direction.SELECTED DRAWING: Figure 11

Description

The technology of the present disclosure relates to a motor, a compressor, and a motor manufacturing method.

2. Description of the Related Art A hermetic compressor is known in which a motor and a compression section driven by the rotational power generated by the motor are housed inside a housing. The motor includes a rotor to which permanent magnets are fixed, an annular yoke portion surrounding the outer circumference of the rotor, a plurality of teeth integrally formed with the yoke portion and protruding from the yoke portion toward the rotor, and a plurality of conducting wires. It has The plurality of conducting wires includes a plurality of windings (coils) wound around the plurality of teeth, and connection wires respectively connected to the plurality of windings (coils) (Patent Document 1). The connection wire is a portion that is applied to the yoke before the winding (coil) is wound around the teeth. disconnection may occur). As a motor to solve this problem, a groove is formed in the surface of the yoke portion facing the windings, and a slot film separating the yoke portion and the windings is processed along the grooves of the yoke portion. There is (Patent Document 2). In this motor, a connecting wire of a conducting wire is passed through a concave groove, and then the conducting wire is further wound around a tooth portion to form a winding wire (coil). As a result, it is possible to prevent the connection wire from being pinched and pressed between the winding wire and the yoke portion, thereby reducing the load on the connection wire.

JP 2018-198518 A JP 2013-138585 A

However, in the manufacturing process of the motor described in Patent Document 2, before the conductive wire is wound around the tooth portion to form the winding (coil), the connecting wire connected to the winding is formed into a concave groove. In the above-described motor having narrow grooves, the step of arranging the connection wires in the grooves is time-consuming, which increases the manufacturing cost. Further, the above-described motor requires processing of the slot film along the recessed groove, which increases the manufacturing cost.

The disclosed technique has been made in view of the above points, and aims to provide a motor, a compressor, and a motor manufacturing method that facilitate manufacturing while reducing the load applied to the conductor.

A motor according to one aspect of the present disclosure includes a rotor and a stator. The stator includes an annular yoke portion surrounding the outer circumference of the rotor, teeth formed integrally with the yoke and protruding from the yoke toward the rotor, windings wound around the teeth, and connected to the windings. A connecting wire and a film separating the yoke and the winding and separating the yoke and the connecting wire are provided. The yoke portion has a concave groove recessed radially outward from the inner peripheral surface of the yoke portion facing the winding wire so that a space for the connection wire is formed between the winding wire and the yoke portion. is formed, and the space is sized to allow the connection line to move in the space in the circumferential direction.

The disclosed motor, compressor, and motor manufacturing method can facilitate manufacturing while reducing the load applied to the conductor.

FIG. 1 is a longitudinal sectional view showing a compressor provided with a motor of Example 1. FIG. FIG. 2 is an exploded perspective view showing the stator of the compressor of Embodiment 1. FIG. FIG. 3 is a top view showing the stator core of the compressor of Example 1. FIG. FIG. 4 is an enlarged top view showing part of the stator core. FIG. 5 is a bottom view showing the anti-lead side insulator. FIG. 6 is an enlarged bottom view showing a part of the anti-lead side insulator. FIG. 7 is an exploded view showing the stator. FIG. 8 is a top view showing a first slot film among a plurality of slot films. FIG. 9 is a bottom view showing the anti-lead side of the stator. FIG. 10 is a top view showing the lead side of the stator. 11 is an enlarged cross-sectional view showing a portion of the yoke portion and the first connection line of the motor of Example 1. FIG. 12 is an enlarged cross-sectional view showing a portion of the yoke portion and the first connection line of the motor of Comparative Example 1. FIG. FIG. 13 is an enlarged cross-sectional view showing a portion of the yoke portion and the first connection line of the motor of Comparative Example 2. FIG. FIG. 14 is an enlarged cross-sectional view showing a portion of the yoke portion and the first connection line of the motor of Example 2. FIG.

Hereinafter, motors, compressors, and motor manufacturing methods according to embodiments disclosed in the present application will be described with reference to the drawings. Note that the technology of the present disclosure is not limited by the following description. Also, in the following description, the same constituent elements are given the same reference numerals, and overlapping descriptions are omitted.

The motor 5 of Example 1 is provided in the compressor 1 as shown in FIG. FIG. 1 is a longitudinal sectional view showing a compressor 1 provided with a motor 5 of Embodiment 1. FIG. Compressor 1 includes housing 2 , shaft 3 , motor 5 and compression section 6 . A sealed internal space 7 is formed inside the housing 2 . The internal space 7 is formed in a generally columnar shape. The housing 2 is formed so that the central axis of the cylinder of the internal space 7 is parallel to the vertical direction when placed vertically on a horizontal surface.

The housing 2 includes a U-phase power terminal 8U, a V-phase power terminal 8V, and a W-phase power terminal 8W. The U-phase power supply terminal 8U is made of a conductor. The U-phase power supply terminal 8U passes through the upper portion of the housing 2 so that one end is arranged in the internal space 7 and the other end is arranged in the internal space 7 . The V-phase power supply terminal 8V is made of a conductor. The V-phase power supply terminal 8V passes through the upper portion of the housing 2 so that one end is arranged in the internal space 7 and the other end is arranged in the internal space 7 . The W-phase power terminal 8W is made of a conductor. The W-phase power supply terminal 8W penetrates through the upper portion of the housing 2 so that one end is arranged in the internal space 7 and the other end is arranged in the internal space 7 . The U-phase power terminal 8U, the V-phase power terminal 8V, and the W-phase power terminal 8W are attached to the housing 2 so as not to be electrically connected to each other and to the housing 2. there is

The housing 2 further includes a suction pipe 11 and a discharge pipe 12 . A flow path 14 is formed inside the suction pipe 11 . The suction pipe 11 is joined to the housing 2 such that the flow path 14 is connected to the lower portion of the internal space 7 . A flow path 15 is formed inside the discharge pipe 12 . The discharge pipe 12 is joined to the housing 2 such that the flow path 15 is connected to the upper portion of the internal space 7 . The shaft 3 is formed like a bar. The shaft 3 is arranged in the internal space 7 along a rotation axis 16 along the central axis of the cylinder formed by the internal space 7 and supported by the housing 2 so as to be rotatable about the rotation axis 16 .

The motor 5 is arranged above the internal space 7 . The motor 5 has a rotor 21 and a stator 22 . The rotor 21 is generally cylindrical. The rotor 21 is fixed to the shaft 3 and supported by the housing 2 so as to be rotatable about the rotating shaft 16 . The rotor 21 has a plurality of permanent magnets (not shown). A plurality of permanent magnets are embedded inside the rotor 21 and fixed to the rotor 21 . The stator 22 is formed generally cylindrical. The stator 22 is arranged so as to surround the outer circumference of the rotor 21 and is fixed to the housing 2 .

The compression part 6 is arranged below the motor 5 in the internal space 7 . The compression unit 6 is a rotary compression mechanism, which compresses the refrigerant supplied through the suction pipe 11 by rotating the shaft 3, and compresses the compressed refrigerant with the motor 5 in the internal space 7. The space between the part 6 is supplied.

FIG. 2 is an exploded perspective view showing the stator 22 of the compressor 1 of Embodiment 1. FIG. The stator 22 includes a stator core 23, an anti-lead side insulator 24, a lead side insulator 25, and a plurality of slot films 261-269 (films). The stator core 23 is formed in a columnar shape, and is formed by stacking a plurality of magnetic steel plates made of a soft magnetic material such as a silicon steel plate in the height direction of the column. A lower end surface 27 and an upper end surface 28 are formed in portions of the stator core 23 corresponding to the two bottom surfaces of the columnar body. The anti-lead side insulator 24 is made of an insulator. Anti-lead side insulator 24 is arranged below stator core 23 and is in contact with lower end surface 27 of stator core 23 . The lead-side insulator 25 is made of an insulator. The lead-side insulator 25 is arranged on the stator core 23 and is in contact with the upper end surface 28 of the stator core 23 .

FIG. 3 is a top view showing the stator core 23 of the compressor 1 of Example 1. FIG. The stator core 23 has a yoke portion 31 and a plurality of teeth portions 321-329. The yoke portion 31 is formed in a substantially cylindrical shape and arranged so that the central axis of the yoke portion 31 overlaps the rotating shaft 16 of the rotor 21 . An inner peripheral surface 33 is formed on the yoke portion 31 . The inner peripheral surface 33 faces the rotating shaft 16 along the cylindrical surface. The yoke portion 31 further includes a portion of the upper end surface 28 of the stator core 23 and a portion of the lower end surface 27 of the stator core 23 (not shown in FIG. 3).

A first tooth portion 321 among the plurality of tooth portions 321 to 329 is formed in a substantially quadrangular prism shape. The first tooth portion 321 is formed integrally with the yoke portion 31 so that one end of the first tooth portion 321 is adjacent to the inner peripheral surface 33 of the yoke portion 31 . That is, the first tooth portion 321 is formed to protrude from the inner peripheral surface 33 of the yoke portion 31 toward the rotating shaft 16 . A part of the upper end surface 28 of the stator core 23 is formed on the first tooth portion 321 , and a part of the lower end surface 27 of the stator core 23 is formed (not shown in FIG. 3 ). The teeth other than the first teeth 321 among the plurality of teeth 321 to 329 protrude from the inner peripheral surface 33 of the yoke 31 toward the rotation shaft 16 in the same manner as the first teeth 321 . is formed in A plurality of teeth portions 321 to 329 are arranged inside the yoke portion 31 so as to be arranged at regular intervals in the circumferential direction, and are formed integrally with the yoke portion 31 .

A plurality of slots 341 to 349 are formed in the stator core 23 . Each of the plurality of slots 341-349 is a space sandwiched between two adjacent tooth portions among the yoke portion 31 and the plurality of tooth portions 321-329. That is, the first slot 341 among the plurality of slots 341-349 is formed between the adjacent first tooth portion 321 and second tooth portion 322 among the plurality of teeth portions 321-329. The second slot 342 is formed between the second tooth portion 322 and the third tooth portion 323 . A third slot 343 is formed between the third tooth portion 323 and the fourth tooth portion 324 . A fourth slot 344 is formed between the fourth tooth portion 324 and the fifth tooth portion 325 . A fifth slot 345 is formed between the fifth tooth portion 325 and the sixth tooth portion 326 . A sixth slot 346 is formed between the sixth tooth portion 326 and the seventh tooth portion 327 . A seventh slot 347 is formed between the seventh tooth portion 327 and the eighth tooth portion 328 . The eighth slot 348 is formed between the eighth tooth portion 328 and the ninth tooth portion 329 . The ninth slot 349 is formed between the ninth tooth portion 329 and the first tooth portion 321 .

FIG. 4 is an enlarged top view showing part of the stator core 23. FIG. A plurality of recessed grooves 35 and 36 are formed in the yoke portion 31 of the stator core 23 . The plurality of grooves 35 and 36 are formed of a plurality of left side grooves 351-359 and a plurality of right side grooves 361-369. The plurality of left concave grooves 351-359 correspond to the plurality of teeth 321-329. The first left recessed groove 351 corresponding to the first tooth portion 321 among the plurality of left recessed grooves 351 to 359 is formed in the vicinity of the first tooth portion 321 in the inner peripheral surface 33 of the yoke portion 31, It is formed on the counterclockwise side of the first tooth portion 321 in the peripheral surface 33 . That is, the first left recessed groove 351 is formed in a region of the inner peripheral surface 33 facing the first slot 341 . The first left recessed groove 351 is formed so as to be recessed from the inner peripheral surface 33 along a straight line parallel to the rotating shaft 16 . Other left grooves different from the first left groove 351 among the plurality of left grooves 351 to 359 are formed in the same manner as the first left groove 351 . For example, the second left recessed groove 352 among the plurality of left recessed grooves 351 to 359 is formed on the counterclockwise side of the second tooth portion 322 of the inner peripheral surface 33 and parallel to the rotation shaft 16. It is formed so as to be recessed from the inner peripheral surface 33 along a straight line.

The plurality of right concave grooves 361-369 correspond to the plurality of teeth 321-329. The first right recessed groove 361 corresponding to the first tooth portion 321 among the plurality of right recessed grooves 361 to 369 is formed in the vicinity of the first tooth portion 321 in the inner peripheral surface 33 of the yoke portion 31, It is formed on the clockwise side of the first tooth portion 321 in the peripheral surface 33 . That is, the first right concave groove 361 is formed in a region of the inner peripheral surface 33 facing the ninth slot 349 . The first right concave groove 361 is formed so as to be recessed from the inner peripheral surface 33 along a straight line parallel to the rotating shaft 16 . Of the plurality of right side grooves 361 to 369 , other right side grooves different from the first right side groove 361 are also formed in the same manner as the first right side groove 361 . For example, the second right recessed groove 362 among the plurality of right recessed grooves 361 to 369 is formed on the inner peripheral surface 33 on the clockwise side of the second tooth portion 322 and is a straight line parallel to the rotation shaft 16 . It is formed so as to be recessed from the inner peripheral surface 33 along the .

FIG. 5 is a bottom view showing the anti-lead side insulator 24. As shown in FIG. The anti-lead side insulator 24 includes an outer peripheral wall portion 41 and a plurality of winding drum portions 421-429. The outer peripheral wall portion 41 is formed in a substantially cylindrical shape. An inner peripheral surface 43 is formed on the outer peripheral wall portion 41 . The inner peripheral surface 43 faces the rotating shaft 16 along the cylindrical surface.

A plurality of winding drum portions 421 - 429 correspond to a plurality of teeth portions 321 - 329 of stator core 23 . A first winding drum portion 421 among the plurality of winding drum portions 421 to 429 is formed in a strip shape. One end of the first winding drum portion 421 is adjacent to the inner peripheral surface 43 of the outer peripheral wall portion 41 , and the first winding drum portion 421 protrudes from the inner peripheral surface 43 of the outer peripheral wall portion 41 toward the rotating shaft 16 . In addition, it is formed integrally with the outer peripheral wall portion 41 . Other winding drum portions different from the first winding drum portion 421 among the plurality of winding drum portions 421 to 429 are formed in the same manner as the first winding drum portion 421, and extend from the inner peripheral surface 43 of the outer peripheral wall portion 41 to the rotation axis. It is formed integrally with the outer peripheral wall portion 41 so as to protrude toward 16 . A plurality of winding drum portions 421 to 429 are arranged inside the outer peripheral wall portion 41 so as to be arranged at regular intervals in the circumferential direction.

A mounting surface 44 is further formed on the anti-lead side insulator 24 . The mounting surface 44 is formed flat along a plane perpendicular to the rotating shaft 16 . A portion of the mounting surface 44 is formed on the outer peripheral wall portion 41, and other portions of the mounting surface 44 are formed on the plurality of winding drum portions 421-429. The anti-lead side insulator 24 is arranged such that the mounting surface 44 is in contact with the lower end surface 27 of the stator core 23 and the inner peripheral surface 33 of the yoke portion 31 of the stator core 23 is attached to the cylindrical surface along which the inner peripheral surface 43 of the outer peripheral wall portion 41 is aligned. It is attached to the stator core 23 so as to follow. The anti-lead side insulator 24 is further attached to the stator core 23 so that the plurality of winding drum portions 421 to 429 cover the lower end surfaces of the plurality of teeth portions 321 to 329 of the stator core 23, respectively.

FIG. 6 is an enlarged bottom view showing a part of the non-lead side insulator 24. As shown in FIG. A plurality of recesses 46 are further formed in the outer peripheral wall portion 41 . The plurality of recesses 46 are formed at positions corresponding to the plurality of recessed grooves 35 and 36 in the circumferential direction. Each of the plurality of recesses 46 is formed in a portion where the mounting surface 44 and the inner peripheral surface 43 are adjacent to each other, and is formed so as to be recessed from the mounting surface 44 and from the inner peripheral surface 43 . The anti-lead side insulator 24 is attached to the stator core 23 so that the plurality of recesses 46 are connected to the plurality of recessed grooves 35 and 36, respectively.

A plurality of slits 47 are formed in the outer peripheral wall portion 41 as shown in FIG. Each of the plurality of slits 47 is formed along another straight line parallel to the straight line along the rotating shaft 16 and is connected to the end of the outer peripheral wall portion 41 opposite to the side where the mounting surface 44 is formed. ing.

In Example 1, the lead-side insulator 25 is formed in the same shape as the anti-lead-side insulator 24 . That is, the lead-side insulator 25 has an outer peripheral wall portion 41 and a plurality of winding drum portions 421 to 429, and an inner peripheral surface 43, a mounting surface 44, and a plurality of concave portions 46 are formed. The lead-side insulator 25 is arranged such that the mounting surface 44 is in contact with the upper end surface 28 of the stator core 23, and the inner peripheral surface 33 of the yoke portion 31 of the stator core 23 is aligned with the cylindrical surface along which the inner peripheral surface 43 of the outer peripheral wall portion 41 is aligned. It is attached to the stator core 23 as shown. The lead-side insulator 25 is further attached to the stator core 23 so that the plurality of winding drum portions 421-429 cover the upper end surfaces of the plurality of teeth portions 321-329 of the stator core 23, respectively. The lead-side insulator 25 and the anti-lead-side insulator 24 can be manufactured indiscriminately by being formed in the same shape, and can be attached to the stator core 23 indiscriminately. Note that the lead-side insulator 25 does not have to have the same shape as the anti-lead-side insulator 24 .

FIG. 7 is an exploded view showing the stator 22. As shown in FIG. The stator 22 has a plurality of conductors. Each of the plurality of conducting wires is, for example, an enameled wire in which a copper wire is coated with enamel. The plurality of conductors includes a first winding 521, a second winding 522, a third winding 523, a fourth winding 524, a fifth winding 525, a sixth winding 526, a seventh winding 527 and an eighth winding. A wire 528 and a ninth winding 529 are provided. The first winding 521 is wound around the first tooth portion 321 of the stator core 23 . The second winding 522 is wound around the second tooth portion 322 . The third winding 523 is wound around the third teeth portion 323 . The fourth winding 524 is wound around the fourth tooth portion 324 . The fifth winding 525 is wound around the fifth tooth portion 325 . The sixth winding 526 is wound around the sixth tooth portion 326 . The seventh winding 527 is wound around the seventh tooth portion 327 . The eighth winding 528 is wound around the eighth tooth portion 328 . The ninth winding 529 is wound around the ninth tooth portion 329 .

The plurality of conductors includes a first connection line 531, a second connection line 532, a third connection line 533, a fourth connection line 534, a fifth connection line 535, a sixth connection line 536, a seventh connection line 537, and an eighth connection. A line 538 and a ninth connecting line 539 are further provided. One end of the first connection line 531 is connected to one end of the first winding wire 521 . A part of the first connection line 531 is arranged inside the first left recessed groove 351 of the stator core 23 , and the other part of the first connection line 531 is arranged in the first recesses 46 of the lead-side insulator 25 . It is arranged inside one recessed portion 461 that is continuously connected to the one left recessed groove 351 .

One end of the second connection line 532 is connected to one end of the second winding 522 . A part of the second connection line 532 is arranged inside the second right recessed groove 362 of the stator core 23 , and the other part of the second connection line 532 is arranged in the second recesses 46 of the lead-side insulator 25 . It is arranged inside one recessed portion 462 that is continuously connected to the two right recessed grooves 362 . One end of the third connection line 533 is connected to one end of the third winding wire 523 . A part of the third connection line 533 is arranged inside the third left recessed groove 353 of the stator core 23 , and the other part of the third connection line 533 is arranged in the third recesses 46 of the lead-side insulator 25 . It is arranged inside one recessed portion 463 that is continuously connected to the three left recessed grooves 353 .

One end of the fourth connection line 534 is connected to one end of the fourth winding 524 . A part of the fourth connection line 534 is arranged inside the fourth right concave groove 364 of the stator core 23 , and the other part of the fourth connection line 534 is arranged inside the plurality of concave portions 46 of the anti-lead side insulator 24 . It is arranged inside one concave portion 464 that is continuously connected to the fourth right concave groove 364 . One end of the fifth connection line 535 is connected to one end of the fifth winding 525 . A part of the fifth connection line 535 is arranged inside the fifth left recessed groove 355 of the stator core 23 , and the other part of the fifth connection line 535 is located inside the recesses 46 of the lead-side insulator 25 . It is arranged inside one concave portion 465 that is continuously connected to the five left concave grooves 355 .

One end of the sixth connection line 536 is connected to one end of the sixth winding 526 . A part of the sixth connection line 536 is arranged inside the sixth right recessed groove 366 of the stator core 23 , and the other part of the sixth connection line 536 is arranged inside the recesses 46 of the anti-lead side insulator 24 . It is arranged inside one concave portion 466 that is continuously connected to the sixth right concave groove 366 . One end of the seventh connection line 537 is connected to one end of the seventh winding wire 527 . A part of the seventh connection line 537 is arranged inside the seventh right recessed groove 367 of the stator core 23 , and the other part of the seventh connection line 537 is located in the first recesses 46 of the plurality of recesses 46 of the lead-side insulator 25 . 7 is arranged inside one recessed portion 467 that is continuously connected to the right recessed groove 367 .

One end of the eighth connection line 538 is connected to one end of the eighth winding wire 528 . A part of the eighth connection line 538 is arranged inside the eighth right recessed groove 368 of the stator core 23 , and another part of the eighth connection line 538 is arranged inside the plurality of recesses 46 of the anti-lead side insulator 24 . It is arranged inside one concave portion 468 that is continuously connected to the eighth right concave groove 368 . One end of the ninth connection line 539 is connected to one end of the ninth winding wire 529 . A part of the ninth connection line 539 is arranged inside the ninth right concave groove 369 of the stator core 23 , and another part of the ninth connection line 539 is arranged inside the plurality of concave portions 46 of the anti-lead side insulator 24 . It is arranged inside one recessed portion 469 that is continuously connected to the ninth right recessed groove 369 .

The plurality of conductors further comprises a first power line 541 and a first neutral line 551 . One end of the first power line 541 is connected to the U-phase power terminal 8U. The other end of the first power supply line 541 is connected to the other end opposite to the one end connected to the first winding 521 of the first connection line 531 . One end of the first neutral wire 551 is connected to the other end of the first winding 521 opposite to the one end connected to the first connecting wire 531 . The other end of the first neutral wire 551 is electrically connected to the neutral point. That is, the first power supply wire 541, the first connection wire 531, the first winding wire 521, and the first neutral wire 551 are formed by a single conductor wire that electrically connects the U-phase power supply terminal 8U and the neutral point. It is

The stator 22 further includes a second crossover wire 562 , a second power wire 542 and a second neutral wire 552 . The second crossover wire 562 is arranged on the outer peripheral side of the outer peripheral wall portion 41 of the insulator 24 opposite to the lead side. The other end of the second winding wire 522 opposite to the one end connected to the second connecting wire 532 passes through one slit 482 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the second connecting wire. It is connected to one end of 562. One end of the second power line 542 passes through one slit 472 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the other end of the second connecting wire 562 . The other end of the second power line 542 is connected to the V-phase power terminal 8V. One end of the second neutral wire 552 is connected to the other end of the second connection wire 532 opposite to the one end connected to the second winding 522 . The other end of the second neutral wire 552 is electrically connected to the neutral point. That is, the second power supply line 542, the second crossover wire 562, the second winding wire 522, the second connection wire 532, and the second neutral wire 552 electrically connect the V-phase power supply terminal 8V and the neutral point. It is made up of one conductor.

The plurality of conductors further comprises a third power line 543 and a third neutral line 553 . One end of the third power line 543 is connected to the W-phase power terminal 8W. The other end of the third power supply line 543 is connected to the other end of the third connection line 533 opposite to the one end connected to the third winding 523 . One end of the third neutral wire 553 is connected to the other end of the third winding 523 opposite to the one end connected to the third connecting wire 533 . The other end of the third neutral wire 553 is electrically connected to the neutral point. That is, the third power supply line 543, the third connection line 533, the third winding wire 523, and the third neutral line 553 are formed of a single conductor that electrically connects the U-phase power supply terminal 8U and the neutral point. It is

The plurality of conductors further includes a fourth crossover wire 564 , a fourth power wire 544 and a fourth neutral wire 554 . The fourth connecting wire 564 is arranged on the outer peripheral side of the outer peripheral wall portion 41 of the insulator 24 opposite to the lead side. The other end of the fourth connection line 534 opposite to the one end connected to the fourth winding 524 passes through one slit 484 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the fourth connecting wire. It is connected to one end of 564. One end of the fourth power line 544 passes through one slit 474 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the other end of the fourth connecting wire 564 . The other end of the fourth power line 544 is connected to the U-phase power terminal 8U. One end of the fourth neutral wire 554 is connected to the other end opposite to the one end of the fourth winding 524 connected to the fourth connecting wire 534 . The other end of fourth neutral wire 554 is electrically connected to the neutral point. That is, the fourth power line 544, the fourth crossover line 564, the fourth connecting line 534, the fourth winding 524, and the fourth neutral line 554 electrically connect the U-phase power terminal 8U and the neutral point. It is formed of a single conductor that

The plurality of conductors further comprises a fifth power line 545 and a fifth neutral line 555 . One end of the fifth power line 545 is connected to the V-phase power terminal 8V and is connected to the end of the second power line 542 that is connected to the V-phase power terminal 8V. The other end of the fifth power supply line 545 is connected to the other end of the fifth connection line 535 opposite to the one end connected to the fifth winding 525 . One end of the fifth neutral wire 555 is connected to the other end of the fifth winding 525 opposite to the one end connected to the fifth connecting wire 535 . The other end of the fifth neutral wire 555 is electrically connected to the neutral point. That is, the fifth power supply wire 545, the fifth winding 525, the fifth connection wire 535, and the fifth neutral wire 555 are formed by a single conducting wire that electrically connects the V-phase power supply terminal 8V and the neutral point. It is Furthermore, the second neutral wire 552, the second connecting wire 532, the second winding 522, the second power wire 542, the fifth power wire 545, the fifth winding 525, the fifth connecting wire 535, and the fifth neutral wire 555 is formed of one conductor.

The plurality of conductors further includes a sixth crossover wire 566 , a sixth power wire 546 and a sixth neutral wire 556 . The sixth connecting wire 566 is arranged on the outer peripheral side of the outer peripheral wall portion 41 of the insulator 24 opposite to the lead side. The other end of the sixth connection line 536 opposite to the one end connected to the sixth winding 526 passes through one slit 486 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the sixth connecting wire. It is connected to one end of 566. One end of the sixth power line 546 passes through one slit 476 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the other end of the sixth connecting wire 566 . The other end of the sixth power line 546 is connected to the W-phase power terminal 8W. One end of the sixth neutral wire 556 is connected to the other end of the sixth winding 526 opposite to the one end connected to the sixth connecting wire 536 . The other end of sixth neutral wire 556 is electrically connected to the neutral point. That is, the sixth power line 546, the sixth crossover line 566, the sixth connection line 536, the sixth winding 526, and the sixth neutral line 556 electrically connect the W-phase power terminal 8W and the neutral point. It is formed of a single conductor that

The plurality of conductors further includes a seventh crossover wire 567 , a seventh power wire 547 and a seventh neutral wire 557 . The seventh connecting wire 567 is arranged on the outer peripheral side of the outer peripheral wall portion 41 of the insulator 24 opposite to the lead side. The other end of the seventh winding wire 527 opposite to the one end connected to the seventh connecting wire 537 passes through one slit 487 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the seventh connecting wire. It is connected to one end of 567. One end of the seventh power line 547 passes through one slit 477 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the other end of the seventh connecting wire 567 . The other end of the seventh power line 547 is connected to the U-phase power terminal 8U and connected to the end of the first power line 541 connected to the U-phase power terminal 8U. One end of the seventh neutral wire 557 is connected to the other end of the seventh connecting wire 537 opposite to the one end connected to the seventh winding 527 . The other end of the seventh neutral wire 557 is electrically connected to the neutral point. That is, the seventh power wire 547, the seventh crossover wire 567, the seventh winding wire 527, the seventh connecting wire 537, and the seventh neutral wire 557 electrically connect the U-phase power terminal 8U and the neutral point. It is formed of a single conductor that Furthermore, the seventh neutral wire 557, the seventh connecting wire 537, the seventh winding wire 527, the seventh crossover wire 567, the seventh power wire 547, the first power wire 541, the first connecting wire 531, and the first winding wire 521 and the first neutral wire 551 are formed of one conductor.

The plurality of conductors further includes an eighth crossover wire 568 , an eighth power wire 548 and an eighth neutral wire 558 . The eighth connecting wire 568 is arranged on the outer peripheral side of the outer peripheral wall portion 41 of the insulator 24 opposite to the lead side. The other end of the eighth connection line 538 opposite to the one end connected to the eighth winding 528 passes through one slit 488 of the plurality of slits 47 of the anti-lead side insulator 24 and reaches the eighth connecting wire. It is connected to one end of 568. One end of the eighth power line 548 passes through one slit 478 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the other end of the eighth connecting wire 568 . The other end of the eighth power line 548 is connected to the V-phase power terminal 8V. One end of the eighth neutral wire 558 is connected to the other end of the eighth winding 528 opposite to the one end connected to the eighth connecting wire 538 . The other end of the eighth neutral wire 558 is electrically connected to the neutral point. That is, the eighth power supply line 548, the eighth crossover line 568, the eighth connection line 538, the eighth winding wire 528, and the eighth neutral wire 558 electrically connect the V-phase power supply terminal 8V and the neutral point. It is formed of a single conductor that

The plurality of conductors further includes a ninth crossover wire 569 , a ninth power wire 549 and a ninth neutral wire 559 . The ninth connecting wire 569 is arranged on the outer peripheral side of the outer peripheral wall portion 41 of the insulator 24 opposite to the lead side. The other end of the ninth winding wire 529 opposite to the one end connected to the ninth connection wire 539 passes through one slit 489 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the ninth connecting wire. It is connected to one end of 569. One end of the ninth power line 549 passes through one slit 479 of the plurality of slits 47 of the anti-lead side insulator 24 and is connected to the other end of the ninth connecting wire 569 . The other end of the ninth power line 549 is connected to the U-phase power terminal 8U and is connected to the end of the third power line 543 connected to the U-phase power terminal 8U. One end of the ninth neutral wire 559 is connected to the other end of the ninth connecting wire 539 opposite to the one end connected to the ninth winding 529 . The other end of the ninth neutral wire 559 is electrically connected to the neutral point. That is, the ninth power wire 549, the ninth crossover wire 569, the ninth winding wire 529, the ninth connecting wire 539, and the ninth neutral wire 559 electrically connect the W-phase power terminal 8W and the neutral point. It is formed of a single conductor that Further, a ninth neutral wire 559, a ninth connecting wire 539, a ninth winding wire 529, a ninth connecting wire 569, a ninth power wire 549, a third power wire 543, a third connecting wire 533, and a third winding wire 523 and the third neutral wire 553 are formed of one conductor.

FIG. 8 is a top view showing the first slot film 261 among the plurality of slot films 261-269. The first slot film 261 is made of an insulator exemplified by polyethylene terephthalate (PET) and formed into a bent sheet shape. The first slot film 261 has a right teeth facing portion 61 , a left teeth facing portion 62 and a yoke facing portion 63 . The yoke facing portion 63 is formed between the right teeth facing portion 61 and the left teeth facing portion 62 . Other slot films different from the first slot film 261 among the plurality of slot films 261 to 269 are also formed in the same manner as the first slot film 261 .

FIG. 9 is a bottom view showing the stator 22. FIG. A plurality of slot films 261-269 are arranged inside a plurality of slots 341-349, respectively. A yoke-facing portion 63 of the first slot film 261 extends along the inner peripheral surface 33 of the yoke portion 31 . Although not shown in FIG. 9, the right tooth facing portion 61 of the first slot film 261 is along the side surface of the first tooth portion 321, and the left tooth facing portion 62 is along the side surface of the second tooth portion 322. . Other slot films different from the first slot film 261 among the plurality of slot films 261 to 269 are also arranged inside one of the plurality of slots 341 to 349 in the same manner as the first slot film 261. there is

A plurality of winding wires 521-529 are wound around a plurality of slot films 261-269 together with a plurality of tooth portions 321-329. The plurality of slot films 261 to 269 are formed by winding the plurality of winding wires 521 to 529 around the plurality of tooth portions 321 to 329 in this manner, thereby forming the plurality of tooth portions 321 to 329 and the plurality of winding wires 521 to 529. , and separates the yoke portion 31 from the plurality of windings 521 to 529 .

A plurality of winding wires 521 to 529 are wound around a plurality of winding drum portions 421 to 429 of the anti-lead side insulator 24 together with a plurality of teeth portions 321 to 329 . The plurality of winding drum portions 421 to 429 of the anti-lead side insulator 24 are formed into the plurality of teeth portions 321 to 329 by winding the plurality of winding wires 521 to 529 around the plurality of teeth portions 321 to 329. It separates a plurality of windings 521-529.

FIG. 10 is a top view showing the stator 22. FIG. A plurality of winding wires 521 to 529 are wound around a plurality of winding drum portions 421 to 429 of the lead side insulator 25 together with a plurality of tooth portions 321 to 329 . The plurality of winding drum portions 421 to 429 of the lead-side insulator 25 are formed by winding the plurality of winding wires 521 to 529 around the plurality of teeth portions 321 to 329 in this manner. are separated from the windings 521 to 529 of the . Anti-lead-side insulator 24, lead-side insulator 25, and slot films 261-269 form stator core 23 by winding wires 521-529 around teeth 321-329. It prevents electrical contact with the plurality of windings 521-529. In other words, the stator core 23 and the plurality of windings 521-529 are insulated from each other by being separated by the anti-lead side insulator 24, the lead side insulator 25 and the plurality of slot films 261-269.

FIG. 11 is an enlarged cross-sectional view of the motor 5 according to the first embodiment, showing the positional relationship between a portion of the yoke portion 131 and the first connection line 531, viewed from the rotation axis direction. As described above, the yoke portion 31 of the motor 5 is formed with the first left recessed groove 351 recessed radially outward from the inner peripheral surface 33 facing the first winding wire 521 . A portion of the first connection line 531 is arranged inside the first left recessed groove 351 . Since the first left groove 351 is formed in the yoke portion 31, a groove inner space 71 surrounded by the inner surface of the first left groove 351 of the yoke portion 31 and the first winding wire 521 is formed. there is The groove inner space 71 is formed to have a certain size so that the first connection line 531 can move in the groove inner space 71 in the circumferential direction. The depth of the first left recessed groove 351 may be larger than the wire diameter of the first connection line 531, and is formed to have a length approximately twice as long as the first connection line 531 in the first embodiment. The width of the first left recessed groove 351 in the circumferential direction should be larger than twice the wire diameter of the first connection wire 531, and in the first embodiment, it is about five times the wire diameter of the first connection wire 531. is formed in The depth of the first left recessed groove 351 is defined as the distance from the inner surface of the first left recessed groove 351 to the root positions of the teeth portions 321 to 329 connected to the yoke portion 31 around the rotation shaft 16. It refers to how far it is located on the outer diameter side from the virtual circle. In addition, as an expression indicating the size of the groove inner space 71, that the first connection line 531 has a size that allows it to move in the groove inner space 71 in the circumferential direction means that the inner surface of the first left groove 351 and the first groove inner surface The size is such that two or more connection wires having the same thickness as the first connection wire 531 can be arranged in the circumferential direction in the groove inner space 71 formed by the outer surface of the first winding wire 521 . The first left recessed groove 351 is further formed such that the depth of the first left recessed groove 351 becomes shallower as it approaches the edge in the circumferential direction of the first left recessed groove 351 . A part of the first connection line 531 is arranged in such a recessed groove inner space 71 .

In Example 1, the groove inner space 71 includes a film outer peripheral space 72 (second space) and a film inner peripheral space 73 (first space). Here, of the yoke-facing portion 63 of the first slot film 261 shown in FIG. 8, the portion arranged in the groove inner space 71 shown in FIG. As shown in FIG. 11 , the recessed groove inner space 71 is divided into a film outer peripheral space 72 and a film inner peripheral space 73 by the recessed groove arrangement portion 64 of the first slot film 261 . That is, in the recessed groove inner space 71, the film outer peripheral space 72 (second space) is formed on the outer peripheral side of the recessed groove arrangement portion 64 of the yoke facing portion 63 of the first slot film. A film inner peripheral space 73 (first space) is formed on the inner peripheral side of the concave groove arrangement portion 64 of the yoke facing portion 63 of the first slot film. The film outer peripheral space 72 is arranged on the outer peripheral side of the yoke facing portion 63 of the first slot film 261 and is located between the recessed groove arrangement portion 64 of the yoke facing portion 63 of the first slot film 261 and the first left recessed groove of the yoke portion 31 . 351 and the inner surface. The film inner peripheral space 73 is arranged on the inner peripheral side of the yoke facing portion 63 of the first slot film 261 and is located between the recessed groove arrangement portion 64 of the yoke facing portion 63 of the first slot film 261 and the first winding wire 521 . being surrounded. A portion of the first connection line 531 is disposed in the film inner peripheral space 73 and is insulated from the stator core 23 .

Part of the first connection line 531 is in the groove inner space 71, so that the groove inner space 71 is divided into a film outer peripheral space 72 (second space) and a film inner peripheral space 73 (first space). Explain the mechanism that divides into
When a portion of the first connection line 531 is arranged on the inner peripheral side of the yoke-facing portion 63 of the first slot film 261, the recessed groove arrangement portion 64 of the yoke-facing portion 63 of the first slot film 261 is located on the inner peripheral side. is pushed out in the outer diameter direction by the first connection line 531 arranged in the . At this time, the connection line contact portion 641 , which is a portion that directly contacts the first connection line 531 , in the groove arrangement portion 64 of the first slot film 261 is located inside the groove inner space 71 . bends and extends toward the outer diameter side of the motor 5 along the outer peripheral surface of the motor 5 . On the other hand, since the first slot film 261 itself is made of an elastic member, the connecting line non-contacting portions 642 continuing on both sides of the connecting line contacting portion 641 in the recessed groove arrangement portion 64 are the extended first slot film 261 . Due to the elastic force (restoring force) acting to restore the length of the slot film 261 to its original length, the starting point 351a of the first left recessed groove 351 and the connection line contact portion 641 are linearly extended to connect. shape. As a result, the groove inner space 71 is divided into a film outer peripheral space 72 (second space) and a film inner peripheral space 73 (first space).

Since part of the first connection line 531 is arranged in the film inner circumference side space 73, the yoke facing portion 63 of the first slot film 261 is pushed to the outer circumference side by coming into contact with the first connection line 531. , and is elastically deformed in the recessed groove inner space 71 so as to bend toward the outer diameter side at a position corresponding to the first left recessed groove 351 in the circumferential direction. Therefore, a portion of the first connection line 531 that is arranged in the film inner peripheral space 73 is brought into contact with the connection line by the elastic force (restoring force) acting on the recessed groove arrangement portion 64 of the first slot film 261 . A force in the inner diameter direction is received from the point 641 and pressed against the first winding wire 521 . As a result, a portion of the first connection wire 531 arranged in the groove inner space 71 is pressed against the first winding wire 521 by the groove arrangement portion 64 and fixed. A part can be restricted from moving in the recessed groove inner space 71 . Since the first connecting wire 531 does not move inside the first left recessed groove 351, the motor 5 can prevent the first connecting wire 561 connected to the first connecting wire 531 from loosening.

In the motor 5 , the first left recessed groove 351 is large enough to allow the first connection wire 531 to move within the first left recessed groove 351 , so that the first connection wire 531 is connected to the yoke portion 31 and the first winding wire 521 . Therefore, the load applied to the first connection line 531 can be reduced. Further, in the motor 5 , the recess 461 through which the first connection wire 531 passes is formed in the lead-side insulator 25 , so that the first connection wire 531 is connected to the outer peripheral wall portion 41 of the lead-side insulator 25 and the first winding 521 . Therefore, the load applied to the first connection line 531 can be reduced. By reducing the load applied to the first connection line 531, the motor 5 can prevent the first connection line 531 from being damaged. As with the first connection line 531, the motor 5 can reduce the load applied to the plurality of connection lines 531-539, and can prevent damage to the plurality of connection lines 531-539.

In addition, in the motor 5 of Example 1, the portion of the first connection line 531 located inside the first left groove 351 extends around the inside of the groove inner space 71 from the position indicated by the solid line in FIG. Even if the recessed groove arrangement portion 64 of the first slot film 261 is displaced in the direction shown by the dotted line, the concave groove arrangement portion 64 of the first slot film 261 bends toward the outer diameter side according to the position of the first connection line 531 in the circumferential direction. By (swelling), it is possible to form the film inner peripheral space 73 and the film outer peripheral space 72 having appropriate sizes corresponding to the positions of the first connection lines 531 . A film outer peripheral space 72 partitioned by the first slot film 261 is formed inside the groove inner space 71 on the outer peripheral side of the film inner peripheral space 73 in which the first connection line 531 is arranged. Thus, the first connection wire 531 is not sandwiched between the yoke portion 31 and the first winding wire 521, and the load applied to the first connection wire 531 can be reduced. On the other hand, the portion (connection line contact portion 641) bent (swelled) toward the outer diameter side of the recessed groove arrangement portion 64 of the elastically deformed first slot film 261 returns to its original shape with an elastic force ( The first connection wire 531 is pressed against the first winding wire 521 by the action of the restoring force. Thereby, the motor 5 of the first embodiment can restrict the movement of the first connection line 531 inside the groove inner space 71 (the first left groove 351).

Of the plurality of grooves 35 and 36 , other grooves different from the first left groove 351 also have shallower depths as they approach the edges, like the first left groove 351 . Therefore, even if the width of each of the plurality of grooves 35 and 36 in the circumferential direction is large, the motor 5 can prevent the magnetic flux passing through the yoke portion 31 from being obstructed, and the magnetic resistance of the yoke portion 31 can be reduced. An increase can be prevented, and an increase in iron loss can be prevented.

Other slot films different from the first slot film 261 among the plurality of slot films 261 to 269 also press the plurality of connection wires 531 to 539 against the plurality of winding wires 521 to 529, respectively, like the first slot film 261. ing. In the motor 5, the plurality of slot films 261 to 269 press the plurality of connection wires 531 to 539 against the plurality of winding wires 521 to 529, respectively, so that the plurality of connection wires 531 to 539 are in the film inner peripheral space 73. You can prevent it from moving. For example, the motor 5 can prevent the fourth connection wire 564 connected to the fourth connection wire 534 from loosening because the fourth connection wire 534 does not move inside the fourth right concave groove 364 .

[Motor manufacturing process]
The motor 5 is manufactured by a motor manufacturing process to be described later. In the manufacturing process of the motor, the plurality of slot films 261-269 are arranged in the plurality of slots 341-349 respectively and attached to the stator core 23. As shown in FIG. Anti-lead side insulator 24 is attached to stator core 23 such that attachment surface 44 contacts lower end surface 27 of stator core 23 . Lead-side insulator 25 is attached to stator core 23 such that attachment surface 44 contacts upper end surface 28 of stator core 23 .

A winding machine is used to wind a plurality of conductor wires around the stator core 23 to which the anti-lead side insulator 24, the lead side insulator 25, and the plurality of slot films 261 to 269 are appropriately attached. The winding machine includes a U-phase conductor nozzle, a V-phase conductor nozzle, and a W-phase conductor nozzle. By appropriately moving the U-phase conductor nozzle, the U-phase conductor among the plurality of conductors can be aligned along a desired position in the stator core 23 . By appropriately moving the V-phase conductor nozzle, the V-phase conductor of the plurality of conductors can be aligned along the desired position of the stator core 23 . By appropriately moving the W-phase conductor nozzle, the W-phase conductor of the plurality of conductors can be aligned along the desired position of the stator core 23 .

The stator core 23 is set in a winding machine after the lead-side insulator 25, the non-lead-side insulator 24, and the plurality of slot films 261-269 are appropriately attached. The winding machine first moves the U-phase conductor nozzle appropriately to pass the U-phase conductor from the lead side of the first teeth 321 through the first slot 341 and the slit 474, and then from the U-phase conductor to the fourth coil. A power line 544 is formed.

After the fourth power supply line 544 is formed, the winding machine appropriately moves the U-phase conductor nozzle to cause the U-phase conductor to follow the outer peripheral side of the outer peripheral wall portion 41 of the anti-lead side insulator 24, A fourth connecting wire 564 is formed from the U-phase conductor. After the fourth connecting wire 564 is formed, the winding machine appropriately moves the U-phase conductor nozzle to pass the U-phase conductor through the slit 484 and along the inside of the fourth right concave groove 364, A fourth connection line 534 is formed from the U-phase conductor. At this time, since the fourth right groove 364 is large, the winding machine does not need to position the U-phase conductor nozzle with high accuracy, and the U-phase conductor can be easily routed along the inside of the fourth right groove 364. can let

After the fourth connection line 534 is formed, the winding machine appropriately moves the U-phase conductor nozzle to wind the U-phase conductor around the fourth tooth portion 324 in a counterclockwise direction. A fourth winding 524 is formed. After the fourth winding 524 is formed, the winding machine properly moves the U-phase conductor nozzle to extend the U-phase conductor from the third slot 343 to the lead side of the fourth tooth portion 324. , forming a fourth neutral wire 554 from the U-phase conductors.

When the fourth power line 544, the fourth crossover line 564, the fourth connection line 534, the fourth winding line 524, and the fourth neutral line 554 are formed, the winding machine sets the V-phase conductor nozzle to U. By moving in synchronism with the phase conductor nozzle, the eighth power line 548, the eighth crossover line 568, the eighth connection line 538, the eighth winding 528, and the eighth neutral line 558 are formed from the V-phase conductor. do. At this time, since the eighth right groove 368 is large, the winding machine does not need to position the V-phase conductor nozzle with high precision, and the V-phase conductor can be easily routed along the inside of the eighth right groove 368. can let

When the fourth power wire 544, the fourth crossover wire 564, the fourth connection wire 534, the fourth winding wire 524, and the fourth neutral wire 554 are formed, the winding machine further operates the nozzle for the W-phase conductor. is moved in synchronism with the U-phase conductor nozzle to move the W-phase conductor to the sixth power line 546, the sixth crossover line 566, the sixth connection line 536, the sixth winding 526, and the sixth neutral line 556. to form At this time, since the sixth right recessed groove 366 is large, the winding machine does not need to position the W-phase conductor nozzle with high accuracy, and the W-phase conductor can be easily routed along the inside of the sixth right recessed groove 366. can let

After the fourth neutral wire 554 is formed, the winding machine properly moves the U-phase conductor nozzle to extend the U-phase conductor from the lead side of the seventh tooth portion 327 to the seventh right concave groove 367 . and form a seventh neutral wire 557 from the U-phase conductor. After the seventh neutral wire 557 is formed, the winding machine appropriately moves the U-phase conductor nozzle to cause the U-phase conductor to run along the inside of the seventh right recessed groove 367, thereby removing the U-phase conductor from the U-phase conductor. A seventh connection line 537 is formed. At this time, since the seventh right groove 367 is large, the winding machine does not need to position the U-phase conductor nozzle with high precision, and the U-phase conductor can be easily routed along the inside of the seventh right groove 367. can let

After the seventh connection line 537 is formed, the winding machine appropriately moves the U-phase conductor nozzle to wind the U-phase conductor clockwise around the seventh tooth portion 327, pass it through the slit 487, A seventh winding 527 is formed from the U-phase conductor. After the seventh winding 527 is formed, the winding machine appropriately moves the U-phase conductor nozzle to cause the U-phase conductor to follow the outer peripheral side of the outer peripheral wall portion 41, thereby removing the U-phase conductor from the U-phase conductor. A seventh connecting wire 567 is formed. After the seventh crossover wire 567 is formed, the winding machine moves the U-phase conductor nozzle appropriately so that the U-phase conductor passes through the slit 477 and the second slot 342 to the lead side of the first tooth portion 321. , a seventh power supply line 547 is formed from the U-phase conductor.

When the seventh neutral wire 557, the seventh connection wire 537, the seventh winding wire 527, the seventh crossover wire 567, and the seventh power wire 547 are formed, the winding machine sets the V-phase conductor nozzle to U. A second neutral wire 552, a second connection wire 532, a second winding wire 522, a second crossover wire 562, and a second power supply wire 542 are formed from the V-phase conductor by moving in synchronism with the phase conductor nozzle. do. At this time, since the second right groove 362 is large, the winding machine does not need to position the V-phase conductor nozzle with high accuracy, and the V-phase conductor can be easily routed along the inside of the second right groove 362. can let

When the seventh neutral wire 557, the seventh connection wire 537, the seventh winding wire 527, the seventh crossover wire 567, and the seventh power wire 547 are formed, the winding machine further operates the W-phase conductor nozzle is moved synchronously with the nozzle for the U-phase conductor, the ninth neutral wire 559, the ninth connection wire 539, the ninth winding wire 529, the ninth crossover wire 569, and the ninth power supply wire 549 are connected from the W-phase conductor. to form At this time, since the seventh right groove 367 is large, the winding machine does not need to position the W-phase conductor nozzle with high precision, and the W-phase conductor can be easily routed along the inside of the seventh right groove 367. can let

After the seventh power supply line 547 is formed, the winding machine properly moves the U-phase conductor nozzle to extend the U-phase conductor from the lead side of the first tooth portion 321 to the first left recessed groove 351 . and form the first power supply line 541 from the U-phase conductor. After the first power supply line 541 is formed, the winding machine appropriately moves the U-phase conductor nozzle to cause the U-phase conductor to run along the inside of the first left recessed groove 351, thereby extending the U-phase conductor from the U-phase conductor to the first power supply line. 1 connecting line 531 is formed. At this time, since the first right groove 361 is large, the winding machine does not need to position the U-phase conductor nozzle with high accuracy, and the U-phase conductor can be easily routed along the inside of the first right groove 361. can let

After the first connection line 531 is formed, the winding machine appropriately moves the U-phase conductor nozzle to wind the U-phase conductor around the first tooth portion 321 counterclockwise, thereby winding the U-phase conductor from the U-phase conductor. A first winding 521 is formed. After the first winding 521 is formed, the winding machine arranges the U-phase conductor between the ninth slot and the lead side of the first teeth 321 by appropriately moving the nozzle for the U-phase conductor. By doing so, the first neutral wire 551 is formed from the U-phase conductor.

The winding machine synchronizes the V-phase conductor nozzle with the U-phase conductor nozzle when the first power line 541, the first connection line 531, the first winding 521, and the first neutral line 551 are formed. 545, a fifth connection line 535, a fifth winding 525, and a fifth neutral line 555 are formed from the V-phase conductor. At this time, since the fifth right groove 365 is large, the winding machine does not need to position the V-phase conductor nozzle with high precision, and the V-phase conductor can be easily routed along the inside of the fifth right groove 365. can let

When the first power line 541, the first connection line 531, the first winding 521, and the first neutral line 551 are formed, the winding machine further changes the nozzle for the W-phase conductor to the nozzle for the U-phase conductor. , the third power line 543, the third connection line 533, the third winding 523, and the third neutral line 553 are formed from the W-phase conductor. At this time, since the third right groove 363 is large, the winding machine does not need to position the W-phase conductor nozzle with high accuracy, and the W-phase conductor can be easily routed along the inside of the third right groove 363. can let

After the fourth neutral wire 554 and the seventh neutral wire 557 are formed, the fourth neutral wire 554 and the seventh neutral wire 557 are disconnected. After the second neutral wire 552 and the eighth neutral wire 558 are formed, the second neutral wire 552 and the eighth neutral wire 558 are disconnected. After the sixth neutral wire 556 and the ninth neutral wire 559 are formed, the sixth neutral wire 556 and the ninth neutral wire 559 are disconnected. The plurality of neutral wires 551-559 are appropriately electrically connected to the plurality of neutral points after being disconnected from each other. A plurality of neutral wires connected to one neutral point of the plurality of neutral wires 551 to 559 are twisted and bundled. Even if, for example, three neutral wires of three phases connected to one neutral point are twisted and bundled on the outer peripheral surface side of the lead-side insulator 25, the motor 5 does not have a plurality of twisted intermediate wires. By arranging the plurality of connection wires respectively connected to the sex lines inside the recessed groove inner space 71, the load applied to the plurality of connection wires can be reduced. It should be noted that the plurality of neutral wires connected to one neutral point out of the plurality of neutral wires 551-559 may not be twisted. Also, the plurality of neutral wires 551-559 may be electrically connected to one neutral point.

The first power line 541, the fourth power line 544 and the seventh power line 547 are twisted and electrically connected to the U-phase power terminal 8U. The second power line 542, the fifth power line 545 and the eighth power line 548 are twisted and electrically connected to the V-phase power terminal 8V. The third power line 543, the sixth power line 546, and the ninth power line 549 are twisted and electrically connected to the W-phase power terminal 8W. In the motor 5, even when the plurality of power wires are twisted, the plurality of connection wires among the plurality of connection wires 531 to 539 each connected to the plurality of twisted power wires are movable in the circumferential direction. The load applied to the plurality of connection lines can be reduced by arranging them inside the recessed groove internal space 71 which is formed to have a size.

The rotor 21 is fixed to the shaft 3 connected to the compression section 6 and attached to the compression section 6 . The motor 5 is manufactured by inserting the rotor 21 attached to the compression section 6 inside the stator 22 . The motor 5 and the compression unit 6 are inserted into the housing 2 and arranged at predetermined positions in the internal space 7 of the housing 2 . The stator core 23 is fixed to the housing 2 after the motor 5 and the compression section 6 are arranged at predetermined positions. After the stator core 23 is fixed to the housing 2, the internal space 7 of the housing 2 is sealed and the compressor 1 is manufactured.

The winding machine used in the motor manufacturing method is not limited to one provided with three nozzles, and may be provided with one nozzle, for example.

[Operation of Compressor 1]
Compressor 1 is provided, for example, in a refrigeration cycle device (not shown), compresses a refrigerant, and is used to circulate the refrigerant in the refrigeration cycle device. The motor 5 generates a rotating magnetic field in the space inside the stator 22 by appropriately applying a three-phase voltage to a plurality of conductors via the U-phase power terminal 8U, the V-phase power terminal 8V, and the W-phase power terminal 8W. to generate The rotor 21 rotates due to the rotating magnetic field generated by the stator 22 . The shaft 3 transmits rotation of the rotor 21 to the compression section 6 . The compression unit 6 sucks the low-pressure gas refrigerant through the suction pipe 11 as the shaft 3 rotates, compresses the sucked low-pressure gas refrigerant to generate high-pressure gas refrigerant, and releases the high-pressure gas refrigerant. It is supplied to the space between the compression section 6 and the motor 5 in the internal space 7 .

The high-pressure gas refrigerant supplied to the space between the compression section 6 and the motor 5 in the internal space 7 passes through the gap formed in the motor 5 , thereby moving the internal space 7 above the motor 5 . is supplied to the space of The high-pressure gas refrigerant supplied to the space above the motor 5 in the internal space 7 is discharged through the discharge pipe 12 to a device downstream of the compressor 1 in the refrigeration cycle device.

[Motor of Comparative Example 1]
In the motor of Comparative Example 1, as shown in FIG. 12, the yoke portion 31 of the stator core 23 of the motor 5 of Example 1 is replaced with another yoke portion 131, and the other portions are the same as those described above. is the same as the motor 5 of the first embodiment. FIG. 12 is an enlarged cross-sectional view showing the positional relationship between a portion of the yoke portion 131 and the first connection line 531 of the motor of Comparative Example 1 from the rotation axis direction. Unlike the yoke portion 31 described above, the yoke portion 131 does not have a plurality of concave grooves 35 and 36 formed therein. In the motor of Comparative Example 1, the first connection wire 531 is sandwiched between the inner peripheral surface 33 of the stator core and the first winding wire 521, and a load is applied so as to crush it. The first connection line 531 may be crushed by the application of a load, resulting in damage exemplified by disconnection.

On the other hand, in the motor 5 of Example 1, the load applied to the first connection line 531 is reduced by arranging the first connection line 531 in the recessed groove space 71 inside the first left recessed groove 351. It is possible to prevent the first connection line 531 from being damaged.

[Motor of Comparative Example 2]
In the motor of Comparative Example 2, as shown in FIG. 13, the yoke portion 31 of the stator core 23 of the motor 5 of Example 1 is further replaced with another yoke portion 231, and the other parts are the It is the same as the motor 5 of the first embodiment described above. FIG. 13 is an enlarged cross-sectional view showing the positional relationship between a portion of the yoke portion 231 and the first connection line 531 of the motor of Comparative Example 2, viewed from the rotation axis direction. A plurality of grooves are formed in the yoke portion 231 in place of the plurality of grooves 35 and 36 described above. The positions of the yoke portion 231 where the plurality of grooves are formed correspond to the positions of the yoke portion 31 where the plurality of grooves 35 and 36 are formed. The first connection line 531 is arranged inside a recessed groove 232 formed at a position corresponding to the position where the already-described first left recessed groove 351 is formed among the plurality of recessed grooves. The groove 232 is smaller than the first left groove 351 so that the first connection line 531 cannot move inside the groove 232, that is, the first connection line 531 is embedded in the groove 232. formed. The width of the groove 232 in the circumferential direction is smaller than the width of the first left groove 351 in the circumferential direction, for example, the width of the groove 232 in the circumferential direction is the first width. It is formed to have a length about 1.5 times the wire diameter of the connecting wire 531 .

In the motor of Comparative Example 2, the above-described first slot film 261 is replaced with another slot film 233 . The slot film 233 has a concave portion 234 formed in the yoke-facing portion 63 of the first slot film 261 described above, and other portions are the same as the first slot film 261 described above. The recess 234 is formed by folding the yoke-facing portion 63 of the slot film 233 . Further, recessed portion 234 is formed such that recessed portion 234 of slot film 233 is in close contact along recessed groove 232 when slot film 233 is attached to stator core 23 .

In the motor of Comparative Example 2, since the recess 234 is formed in the slot film 233, the slot film 233 is creased and the recess is formed as compared with the first slot film 261 of the motor 5 of Example 1 described above. 234, which increases the manufacturing cost. Further, in the motor of Comparative Example 2, when the slot film 233 is attached to the stator core 23, the recess 234 of the slot film 233 needs to be arranged inside the recess groove 232. Therefore, the recess 234 of the slot film 233 and the stator core 23 and the recessed groove 232 are required to have high dimensional accuracy, which increases the manufacturing cost. Further, in the motor of Comparative Example 2, when the first connection line 531 is arranged inside the groove 232, the width of the groove 232 in the circumferential direction is narrow, so that the nozzle of the winding machine can be positioned with high accuracy. There is a need.

On the other hand, the first slot film 261 of the motor 5 of Example 1 is easier to manufacture than the slot film 233 of the motor of Comparative Example 2 because the concave portion 234 is not formed. In the motor 5 of Embodiment 1, the plurality of slot films 261 to 269 are not formed with the recesses 234, so that the plurality of slot films 261 to 269 can be easily attached to the stator core 23. FIG. In the motor 5 of Example 1, the width of the first left groove 351 in the circumferential direction is large. In comparison, even if the positioning accuracy of the nozzle is low, the first connection line 531 can be easily positioned inside the first left recessed groove 351 , and the first left recessed groove 351 can be aligned with the first left recessed groove 351 . The process of arranging inside can be facilitated. Therefore, the motor 5 of Example 1 can be manufactured more easily than the motor of Comparative Example 2.

[Effect of Compressor 1 of Embodiment 1]
The motor 5 of Example 1 includes a rotor 21 and a stator 22 . The stator 22 includes a yoke portion 31 , a first tooth portion 321 , a first winding wire 521 , a first connection wire 531 and a first slot film 261 . The yoke portion 31 is formed in an annular shape and surrounds the outer circumference of the rotor 21 . The first tooth portion 321 is formed integrally with the yoke portion 31 and formed to protrude from the yoke portion 31 toward the rotor 21 . The first winding 521 is wound around the first tooth portion 321 . The first connection line 531 is connected to the first winding 521 . The first slot film 261 separates the yoke portion 31 and the first winding wire 521 and separates the yoke portion 31 and the first connection line 531 . In the yoke portion 31, the first winding wire of the yoke portion 31 is arranged so that the recessed groove space 71 in which the first connection wire 531 is disposed between the first winding wire 521 and the yoke portion 31 is formed. A first left recessed groove 351 recessed radially outward from the inner peripheral surface 33 facing 521 is formed. The groove inner space 71 is formed to have a size that allows the first connection line 531 to move in the groove inner space 71 in the circumferential direction.

At this time, the motor 5 of the first embodiment can prevent the first connection wire 531 from being pinched between the yoke portion 31 and the first winding wire 521, thereby reducing the load applied to the first connection wire 531. can be done. Further, in the motor 5 of the first embodiment, the recessed groove inner space 71 formed by the first left recessed groove 351 is formed to have a size that allows the first connection line 531 to move in the circumferential direction. a step of arranging the first connection wire 531 so as to pass through the inside of the first left recessed groove 351; 321, the step of arranging the first connection wire 531 inside the first left recessed groove 351 before the first winding wire 521 is wound around the teeth can be facilitated. can be facilitated.

Further, the compressor 1 including the motor 5 of the first embodiment includes a housing in which a compression unit 6 driven by the power of the motor 5 and a closed space in which the motor 5 and the compression unit 6 are stored are arranged. 2. Manufacture of the compressor 1 can be facilitated by including the motor 5 of the first embodiment.

By the way, a plurality of recesses 46 through which a plurality of connection wires 531 to 539 pass are formed in the anti-lead side insulator 24 and the lead side insulator 25 of the motor 5 of the first embodiment described above. may be omitted. Even when a plurality of recesses 46 are formed, the motor 5 can prevent the first connection line 531 from being pinched between the yoke portion 31 and the first winding wire 521, and the load applied to the first connection line 531 can be prevented. can be reduced and manufacturing can be facilitated.

Also, the plurality of recesses 46 may be formed only on one end side in the axial direction of each insulator. For example, the plurality of recesses 46 formed in the non-lead side insulator 24 and the lead side insulator 25 are formed only at the end facing the stator core 23 , and the end not facing the stator core 23 The concave portion may not be formed by forming along the inner peripheral surface 33 of the . In this case, the recesses of the anti-lead side insulator 24 and the lead side insulator 25 are formed in the first winding wire 521 while preventing the first connection wire 531 from being sandwiched between the yoke portion 31 and the first winding wire 521 . By being regulated by the end on the non-existing side, it is possible to prevent the first winding wire 521 from entering the groove inner space 71 and reducing the size of the groove inner space 71 .

By the way, the depth of the first left recessed groove 351 of the motor 5 of the first embodiment described above becomes shallower as it approaches the edge in the circumferential direction, but it may be formed to have the same depth. Even in such a case, the motor 5 can reduce the load applied to the first connection line 531, and facilitate the process of arranging the first connection line 531 inside the first left recessed groove 351. .

By the way, the fourth power line 544 and the seventh power line 547 of the motor 5 of the above-described first embodiment are not arranged in the recessed groove inner space 71 inside the first left recessed groove 351, but some of them are It may be arranged in the groove inner space 71 of the first left groove 351 together with the first connection line 531 . Similarly, a portion of the second power line 542 and a portion of the eighth power line 548 may be arranged in the recessed groove space 71 of the fifth left recessed groove 355 together with the fifth connection line 535 . A portion of the sixth power line 546 and a portion of the ninth power line 549 may be arranged in the groove inner space 71 of the third left groove 353 together with the third connection line 533 . At this time, the motor can further prevent the plurality of power lines from being caught between the yoke portion 31 and the windings, thereby reducing the load applied to the plurality of power lines.

In the motor of Example 2, as shown in FIG. 14, the first slot film 261 of the motor 5 of Example 1 is replaced with another slot film 81, and the other parts are the same as those described above. It is the same as the motor 5 of the first embodiment. FIG. 14 is an enlarged cross-sectional view seen from the rotation axis direction, showing the positional relationship between a portion of the yoke portion 31 and the first connection line 531 of the motor of Example 2. As shown in FIG. The slot film 81 has a concave portion 82 formed in the yoke-facing portion 63 of the first slot film 261 described above, and the other portions are the same as the first slot film 261 described above. The concave portion 82 is formed by forming a crease in the yoke-facing portion 63 of the slot film 81 . Further, recessed portion 82 is formed so that recessed portion 82 is in close contact along first left recessed groove 351 when slot film 81 is attached to stator core 23 .

The motor of Example 2 can prevent the first connection wire 531 from being caught between the yoke portion 31 and the first winding wire 521 in the same manner as the motor 5 of Example 1 described above. The load applied to line 531 can be reduced. In the motor 5 of Example 1, as in the motor 5 of Example 1 described above, the first connection wire 531 is arranged in the first left recessed groove 351 before the first winding wire 521 is wound around the teeth. The process of arranging inside can be facilitated, and manufacturing can be facilitated.

Here, a characteristic effect of the motor of Example 1 will be described in comparison with Example 2. FIG. The first slot film 261 of the motor 5 of the above-described first embodiment is easier to manufacture than the slot film 81 of the motor of the second embodiment because the concave portion 82 is not formed. Therefore, the motor 5 of the first embodiment described above can be manufactured more easily than the motor of the second embodiment.

In the motor of Example 2, the concave portion 82 of the first slot film 261 is not elastically deformed, and the first connecting wire 531 arranged inside the first left concave groove 351 is pressed against the first winding wire 521. not In the motor 5 of Embodiment 1 described above, the yoke-facing portion 63 of the first slot film 261 is elastically deformed, and the elastic force of the first slot film 261 presses the first connection wire 531 against the first winding wire 521 . . Therefore, the motor 5 of the first embodiment described above can further suppress movement of the first connection line 531 inside the first left recessed groove 351 compared to the motor of the second embodiment.

In the motor 5 of Example 1, even if the portion of the first connection line 531 located inside the first left groove 351 is arranged slightly shifted in the circumferential direction inside the groove inner space 71, The concave groove arrangement portion 64 of the 1-slot film 261 swells to the outer diameter side in accordance with the position of the first connection line 531, so that the inner peripheral side of the film of an appropriate size according to the position of the first connection line 531 is formed. A space 73 and a film outer peripheral space 72 can be formed. A film outer peripheral space 72 partitioned by the first slot film 261 is formed inside the groove inner space 71 on the outer peripheral side of the film inner peripheral space 73 in which the first connection line 531 is arranged. Thus, the first connection wire 531 is not sandwiched between the yoke portion 31 and the first winding wire 521, and the load applied to the first connection wire 531 can be reduced. On the other hand, an elastic force (restoring force) acts to restore the original shape of the portion (connection line contact portion 641) that bulges toward the outer diameter side of the concave groove arrangement portion 64 of the elastically deformed first slot film 261. Thereby, the first connection wire 531 is pressed against the first winding wire 521 . As a result, the motor 5 of the first embodiment restricts the movement of the first connecting wire 531 inside the groove inner space 71 (the first left groove 351) as compared with the motor of the second embodiment. can be done.

Although the embodiments have been described above, the embodiments are not limited by the contents described above. In addition, the components described above include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those within the so-called equivalent range. Furthermore, the components described above can be combined as appropriate. Furthermore, at least one of various omissions, replacements, and modifications of components can be made without departing from the gist of the embodiments.

1: Compressor 2: Housing 5: Motor 6: Compressor 21: Rotor 22: Stator 23: Stator core 24: Anti-lead side insulator 25: Lead side insulator 261-269: Plural slot films 31: Yoke section 321-329 : A plurality of tooth portions 33 : Inner peripheral surface (stator core)
35, 36: plural concave grooves 41: outer peripheral wall portion 43: inner peripheral surface (insulator)
46: multiple recesses 521 to 529: multiple windings 531 to 539: multiple connection wires 541 to 549: multiple power supply wires 551 to 559: multiple neutral wires 562 to 569: multiple crossover wires 71: concave groove Inner space 72: film outer peripheral space (second space)
73: Film inner circumference side space (first space)

Claims (12)

a rotor;
a stator;
The stator is
an annular yoke portion surrounding the outer periphery of the rotor;
a tooth portion integrally formed with the yoke portion and protruding from the yoke portion toward the rotor;
a winding wound around the teeth;
a connecting wire connected to the winding;
a film separating the yoke portion and the winding wire and separating the yoke portion and the connecting wire;
The yoke portion has an outer diameter from an inner peripheral surface of the yoke portion facing the winding wire so that a space in which the connection wire is arranged is formed between the winding wire and the yoke portion. A recessed groove is formed on the side,
The space is formed in a size that allows the connection line to move in the space in the circumferential direction. 2. The motor according to claim 1, wherein the groove has a circumferential width greater than twice the diameter of the connecting wire. 3. The motor according to claim 1, wherein the groove is formed such that the depth of the groove becomes shallower as it approaches an edge in the circumferential direction of the groove. The space is
a first space formed between the film and the winding wire in which the connection wire is arranged;
a second space formed between the film and the yoke portion;
A motor according to any one of claims 1 to 3. 5. The motor according to any one of claims 1 to 4, wherein the connecting wire is pressed against the winding wire by an elastic force of the film. The film is flexed to the outer diameter side by contacting the connection line at a position corresponding to the groove in the circumferential direction,
A motor according to any one of claims 1 to 5. The motor according to any one of claims 1 to 6, wherein the film further separates the teeth and the windings. another tooth portion integrally formed with the yoke portion and protruding from the yoke portion toward the rotor;
another winding wound around the other teeth;
further comprising an insulator formed in an annular shape and in contact with an axial end portion of the yoke portion;
The connection line has a crossover wire connected to another winding wire and arranged on the outer peripheral side of the insulator,
The insulator has a slit formed at a position corresponding to the groove in the circumferential direction, through which the connection line having the connecting wire passes.
A motor according to any one of claims 1 to 7. 9. The motor according to claim 8, wherein the insulator has a concave portion axially continuous with the concave groove at a position corresponding to the concave groove in the circumferential direction. 10. The motor according to any one of claims 1 to 9, wherein the windings are electrically connected to a power supply or neutral via the connecting wires. a motor according to any one of claims 1 to 10;
a compression unit driven by the power that rotates the rotor;
a housing in which a closed space is formed in which the motor and the compression unit are stored;
Compressor with A motor manufacturing method for manufacturing the motor according to any one of claims 1 to 10,
disposing the connection line inside the groove;
A method of manufacturing a motor, comprising: winding the winding wire around the tooth portion after the connection wire is disposed inside the concave groove.

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