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CN-224218162-U - Rotor punching sheet, driving motor and vehicle

CN224218162UCN 224218162 UCN224218162 UCN 224218162UCN-224218162-U

Abstract

The utility model discloses a rotor punching sheet, a driving motor and a vehicle, wherein the rotor punching sheet comprises a punching sheet body, a plurality of magnetic pole units are arranged on the punching sheet body along the circumferential direction, an inner magnetic steel groove group and an outer magnetic steel groove group are arranged on each magnetic pole unit, the outer magnetic steel groove group is arranged on the outer side of the inner magnetic steel groove group in the radial direction of the punching sheet body, the inner magnetic steel groove group and the outer magnetic steel groove group are of V shapes, two first auxiliary grooves are formed in the outer circle positions of each magnetic pole unit and are symmetrical with each other about the central axis of the inner magnetic steel groove group, the punching sheet body is provided with a circle center, the included angle between two end points of the inner magnetic steel groove group in the circumferential direction of the punching sheet body and the circle center is beta, and the positions of the first auxiliary grooves are related to the included angle beta. The utility model can reduce the torque pulsation of the motor, improve the counter-potential wave type sine degree of the motor, reduce the electromagnetic force of the motor and improve the NVH of the motor.

Inventors

  • MI ZEYIN
  • SU LING
  • CAO QILIANG

Assignees

  • 辰致汽车科技集团有限公司重庆创新研究分公司
  • 辰致汽车科技集团有限公司

Dates

Publication Date
20260508
Application Date
20250208

Claims (10)

  1. 1. A rotor punching sheet is characterized by comprising a punching sheet body, wherein a plurality of magnetic pole units are arranged on the punching sheet body along the circumferential direction, an inner magnetic steel groove group (1) and an outer magnetic steel groove group (2) are arranged on each magnetic pole unit, the outer magnetic steel groove group (2) is arranged on the outer side of the inner magnetic steel groove group (1) in the radial direction of the punching sheet body, the inner magnetic steel groove group (1) and the outer magnetic steel groove group (2) are all V-shaped, two first auxiliary grooves (3) are formed in the outer circle of each magnetic pole unit, and the two first auxiliary grooves (3) are symmetrical with respect to the central axis of the inner magnetic steel groove group (1); The punching sheet body is provided with a circle center, the included angle between two end points of the inner magnetic steel groove group (1) in the circumferential direction of the punching sheet body and the circle center is beta, wherein the included angle between the connecting line of one first auxiliary groove (3) and the circle center of the punching sheet body and the connecting line of the other first auxiliary groove (3) and the circle center of the punching sheet body is phi 2 , and phi 2 is more than or equal to 0.5 beta.
  2. 2. The rotor punching sheet according to claim 1, characterized in that two second auxiliary grooves (4) are formed at the outer circle of each magnetic pole unit, and the two second auxiliary grooves (4) are symmetrical with respect to the central axis of the outer magnetic steel groove group (2); The included angle between two end points of the outer magnetic steel groove group (2) in the circumferential direction of the punching body and the circle center is alpha, wherein the included angle between the connecting line of one second auxiliary groove (4) and the circle center of the punching body and the connecting line of the other second auxiliary groove (4) and the circle center of the punching body is phi 1 , and the included angle between 0.5alpha is less than or equal to phi 1 and less than or equal to 0.95 alpha.
  3. 3. The rotor punching sheet according to claim 2, characterized in that the number of the magnetic pole units is N, wherein, And (2) and 。
  4. 4. The rotor punching sheet as claimed in any one of claims 1 to 3, characterized in that the V-shaped included angle of the outer layer magnetic steel groove set (2) is theta 1 , and the V-shaped included angle of the inner layer magnetic steel groove set (1) is theta 2 , wherein theta 1 is 155 DEG or more and 175 DEG or less, and theta 2 is 80 DEG or more and 100 DEG or less.
  5. 5. The rotor punching sheet as claimed in claim 2, characterized in that the first auxiliary groove (3) and the second auxiliary groove (4) have a depth of 0.5mm-1.2mm.
  6. 6. The rotor punching sheet as claimed in claim 5, characterized in that the first auxiliary groove (3) and the second auxiliary groove (4) are semicircular, semi-elliptical, triangular or polygonal.
  7. 7. The rotor punching sheet according to claim 1, characterized in that the inner layer magnetic steel groove group (1) comprises two inner layer grooves, one permanent magnet is respectively arranged in the two inner layer grooves, the outer layer magnetic steel groove group (2) comprises two outer layer grooves which are symmetrically arranged, and one permanent magnet is respectively arranged in the two outer layer grooves.
  8. 8. The rotor punching sheet as claimed in claim 7, characterized in that a magnetism isolating hole (5) is arranged between the two inner layer grooves, and a magnetism isolating bridge (6) in an eight shape or a herringbone shape is formed between the magnetism isolating hole (5) and the two inner layer grooves.
  9. 9. A drive motor comprising a rotor blade according to any one of claims 1-7.
  10. 10. A vehicle comprising the drive motor according to claim 9.

Description

Rotor punching sheet, driving motor and vehicle Technical Field The utility model relates to a new energy automobile, in particular to a rotor punching sheet, a driving motor and a vehicle. Background The new energy automobile is taken as the mainstream trend of the development of the automobile industry, and the performance optimization of a core component, namely a driving motor system, is particularly important. Among these, NVH (Noise, vibration, harshness, i.e., noise, vibration, and harshness) characteristics are one of the key indicators for measuring the quality of the driving motor system, and are directly related to the driving and riding comfort experience of the driver and passengers. If the NVH control of the driving motor is not proper, bad phenomena such as motor squeal, vibration transmission to the car body, etc. may occur, which may seriously reduce the riding comfort of passengers, and may even cause intense dissatisfaction and frequent complaints of customers, thereby affecting the market public praise and competitiveness of the product. Therefore, in the design process of the power assembly of the new energy automobile, the NVH characteristic of the driving motor is deeply optimized, which becomes an indispensable important link. The prior art adopts a short-distance double-layer winding mode, can improve the waveform of electromotive force and magnetomotive force so as to reduce NVH of the motor, but has no obvious effect, and adopts a sloping pole or a chute so as to reduce electromagnetic force, but increases the process difficulty of the motor, reduces the output torque of the motor and influences the performance of the whole vehicle. Disclosure of utility model In view of the above, the present utility model aims to provide a rotor punching sheet, a driving motor and a vehicle, which can optimize a magnetic circuit structure for improving a magnetic flux path, thereby reducing torque pulsation of the motor, improving sine degree of counter-potential wave type of the motor, reducing electromagnetic force of the motor, and improving NVH of the motor. The rotor punching sheet comprises a punching sheet body, wherein a plurality of magnetic pole units are arranged on the punching sheet body along the circumferential direction, an inner magnetic steel groove group and an outer magnetic steel groove group are arranged on each magnetic pole unit, and the outer magnetic steel groove group is arranged on the outer side of the inner magnetic steel groove group in the radial direction of the punching sheet body; The punching sheet body is provided with a circle center, the included angle between two end points of the inner magnetic steel groove group in the circumferential direction of the punching sheet body and the circle center is beta, the included angle between the connecting line of one first auxiliary groove and the circle center of the punching sheet body and the connecting line of the other first auxiliary groove and the circle center of the punching sheet body is phi 2, and the included angle between 0.5beta is less than or equal to phi 2 and less than or equal to 0.95beta. Further, two second auxiliary grooves are formed in the outer circle of each magnetic pole unit, and the two second auxiliary grooves are symmetrical to the central axis of the outer magnetic steel groove group; The included angle between two end points of the outer magnetic steel groove group in the circumferential direction of the punching sheet body and the circle center is alpha, the included angle between the connecting line of one second auxiliary groove and the circle center of the punching sheet body and the connecting line of the other second auxiliary groove and the circle center of the punching sheet body is phi 1, and the included angle between 0.5alpha is less than or equal to phi 1 and less than or equal to 0.95 alpha. Further, the number of the magnetic pole units is N, wherein,And is also provided with Further, the V-shaped included angle of the outer layer magnetic steel groove group is theta 1, the V-shaped included angle of the inner layer magnetic steel groove group is theta 2, wherein theta 1 degrees are more than or equal to 155 degrees and less than or equal to 175 degrees, and theta 2 degrees are more than or equal to 80 degrees and less than or equal to 100 degrees. Further, the first auxiliary groove and the second auxiliary groove have a depth of 0.5mm to 1.2mm. Further, the first auxiliary groove and the second auxiliary groove are semicircular, semi-elliptical, triangular or polygonal. Further, the inner layer magnetic steel groove group comprises two inner layer grooves, one permanent magnet is respectively arranged in the two inner layer grooves, the outer layer magnetic steel groove group comprises two outer layer grooves which are symmetrically arranged, and one permanent magnet is respectively arranged in the two outer layer grooves. Further, a magnetism isolating hole is arrange