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CN-121986437-A - Stator and motor

CN121986437ACN 121986437 ACN121986437 ACN 121986437ACN-121986437-A

Abstract

One embodiment of the motor of the present invention includes a stator core and a winding portion. The winding portion has a plurality of conductor connecting bodies. The conductor connecting bodies in phase respectively comprise 2N first conductor connecting bodies and 2N second conductor connecting bodies, wherein N is a natural number. The conductor connecting body passes through the plurality of slots and is wound in the circumferential direction for a plurality of turns from the input end to the output end, and is transferred to the radially inner layer every turn. The input ends of the phases are interconnected and the output ends of the phases are interconnected. The conductor connecting bodies of the same phase pass through the grooves arranged in the circumferential direction, respectively, and pass through the grooves so as to intersect each other every turn and change the circumferential arrangement.

Inventors

  • SUGAYA KOJI
  • TANAKA KUNIAKI

Assignees

  • 尼得科株式会社

Dates

Publication Date
20260505
Application Date
20241008
Priority Date
20231010

Claims (8)

  1. 1. A stator is provided with: A stator core provided with a plurality of slots arranged in the circumferential direction with respect to the central axis, and A winding portion attached to the stator core, The winding part has a plurality of conductor connecting bodies formed by a plurality of conductors connected with each other, A plurality of the conductor links are classified into a plurality of phases of the conductor links, The conductor connecting bodies in the same phase respectively comprise 2N first conductor connecting bodies and 2N second conductor connecting bodies, wherein N is a natural number, The imaginary area of the slot in which one of the conductors is arranged is set as a layer, the layer being arranged in the radial direction in the slot, The first conductor junction having a first input end at one end and a first output end at the other end, the first conductor junction passing through the plurality of slots and being wound in a circumferential direction from the first input end to the first output end for a plurality of turns, and each turn being shifted toward the radially inner layer, The second conductor junction having a second output end at one end and a second input end at the other end, the second conductor junction passing through the plurality of slots and being wound in a circumferential direction from the second output end to the second input end for a plurality of turns, and each turn being shifted toward the radially inner layer, The first input end and the second input end in phase are connected to each other, The first output end and the second output end in phase are connected with each other, The plurality of first conductor connecting bodies in phase pass through the plurality of grooves arranged in the circumferential direction respectively, pass through the grooves in such a manner that the grooves intersect each other every turn to change the circumferential arrangement, The second conductor connecting bodies of the same phase pass through the grooves arranged in the circumferential direction, respectively, and pass through the grooves so as to intersect each other every turn and change the circumferential arrangement.
  2. 2. The stator of claim 1, wherein, The conductor links of the same phase pass through one of the slots.
  3. 3. The stator of claim 1, wherein, The stator includes a plurality of bus bars positioned on one axial side of the winding portion and connected to the winding portion, The plurality of conductor connecting bodies are classified into the conductor connecting bodies of the first phase, the conductor connecting bodies of the second phase, and the conductor connecting bodies of the third phase which mutually constitute the Y-wire, The bus bar has: A first phase bus bar connecting 2N of the first input ends of the first phase with 2N of the second input ends; a second bus bar connecting 2N of the first input ends of the second phase with 2N of the second input ends; A third phase bus bar connecting 2N of the first input ends and 2N of the second input ends of the third phase, and And a neutral point bus bar connecting a total of 6N first output ends of the first phase, the second phase, and the third phase to a total of 6N second output ends.
  4. 4. The stator according to claim 3, wherein, The 2N slots from which the first input end of the first phase extends are identical slots to the 2N slots from which the second input end of the first phase extends, The 2N slots from which the first input end of the second phase extends are identical slots to the 2N slots from which the second input end of the second phase extends, The 2N slots from which the first input end of the third phase extends are identical slots to the 2N slots from which the second input end of the third phase extends.
  5. 5. The stator according to claim 3, wherein, The 2N slots from which the first output end of the first phase extends are identical slots to the 2N slots from which the second output end of the first phase extends, The 2N slots from which the first output end of the second phase extends are identical slots to the 2N slots from which the second output end of the second phase extends, The 2N slots from which the first output ends of the third phase extend are identical slots to the 2N slots from which the second output ends of the third phase extend.
  6. 6. The stator according to claim 3, wherein, The 2N slots from which the first output end of the first phase extends are identical slots to the 2N slots from which the second output end of the first phase extends, The 2N slots from which the first output end of the second phase extends are identical slots to the 2N slots from which the second output end of the second phase extends, The 2N slots from which the first input end of the third phase extends are identical slots to the 2N slots from which the second input end of the third phase extends.
  7. 7. The stator according to claim 3, wherein, The 2N slots from which the first input end of the first phase extends are identical slots to the 2N slots from which the second input end of the first phase extends, The 2N slots from which the first input end of the second phase extends are identical slots to the 2N slots from which the second input end of the second phase extends, The 2N slots from which the first output ends of the third phase extend are identical slots to the 2N slots from which the second output ends of the third phase extend.
  8. 8. A motor is provided with: The stator according to claim 1 to 7, and And a rotor disposed radially inward of the stator.

Description

Stator and motor Technical Field The present invention relates to a stator and a motor. The present application claims priority based on 10/2023 in japanese patent application No. 2023-175419 of japanese application and the contents thereof are incorporated herein. Background For the purpose of improving the efficiency of a motor, development of a stator having a winding structure using a plurality of segment coils is being advanced. Patent document 1 discloses a segmented coil having flat wires connected in parallel to each other. Prior art literature Patent literature Patent document 1 Japanese patent application laid-open No. 2019-41440 Disclosure of Invention Problems to be solved by the invention By making the segmented coils more parallel, the torque reduction in high-speed rotation can be suppressed. On the other hand, the multi-parallel segmented coils are affected by the magnetic field from the rotor, and there is a possibility that the amplitude of the current value may deviate or the phase of the current may deviate between the parallel conductors. If such amplitude deviation or phase deviation occurs, the rotation of the rotor becomes uneven. In view of the above, an object of the present invention is to provide a stator capable of stabilizing rotation of a rotor and a motor including such a stator. Means for solving the problems One embodiment of the stator of the present invention includes a stator core provided with a plurality of slots arranged in a circumferential direction with respect to a central axis, and a winding portion attached to the stator core. The winding portion has a plurality of conductor connecting bodies composed of a plurality of conductors connected to each other. The plurality of conductor links are classified into the plurality of phases of the conductor links. The conductor connecting bodies in phase respectively comprise 2N first conductor connecting bodies and 2N second conductor connecting bodies, wherein N is a natural number. A virtual area for one conductor arrangement in the groove is set as a layer, and a plurality of layers are arranged in the groove in the radial direction. The first conductor coupling has a first input end at one end and a first output end at the other end, passes through the plurality of slots and is wound in a circumferential direction from the first input end to the first output end for a plurality of turns, and is shifted to the layer radially inward each turn. The second conductor joint has a second output end portion at one end portion and a second input end portion at the other end portion, passes through the plurality of grooves and is wound in a circumferential direction from the second output end portion to the second input end portion for a plurality of turns, and is shifted to the layer radially inward each turn. The first input end and the second input end in phase are connected with each other. The first output end and the second output end in phase are connected with each other. The plurality of first conductor connecting bodies in phase pass through the plurality of grooves arranged in the circumferential direction, respectively, and pass through the grooves so as to intersect each other every turn and change the circumferential arrangement. The second conductor connecting bodies of the same phase pass through the grooves arranged in the circumferential direction, respectively, and pass through the grooves so as to intersect each other every turn and change the circumferential arrangement. The motor according to one embodiment of the present invention includes the stator described above, and a rotor disposed radially inward of the stator. Effects of the invention According to one aspect of the present invention, a stator capable of stabilizing rotation of a rotor and a motor including such a stator can be provided. Drawings FIG. 1 is a schematic cross-sectional view of a motor of one embodiment. Fig. 2 is a sectional view of the motor along the line II-II of fig. 1. Fig. 3 is a schematic diagram showing a circuit formed by a winding portion and a bus bar unit according to an embodiment. Fig. 4 is a schematic diagram showing a winding configuration of four conductor joints in phase according to one embodiment. Fig. 5 is a schematic diagram of the winding structure of four U-phase conductor joints according to one embodiment. Fig. 6 is a schematic diagram of the winding structure of four V-phase conductor connected bodies according to one embodiment. Fig. 7 is a schematic diagram of a winding structure of four W-phase conductor connected bodies according to an embodiment. Fig. 8 is a schematic diagram showing a winding portion and a bus bar unit according to an embodiment. Fig. 9 is a schematic diagram showing a winding portion and a bus bar unit according to modification 1. Fig. 10 is a schematic view showing a winding portion and a bus bar unit according to modification 2. Fig. 11 is a schematic view showing a winding portion