US 11,689,071 B2
Rotor structure, permanent magnet auxiliary synchronous reluctance motor, and electric vehicle
Yusheng Hu, Zhuhai (CN); Tong Tong, Zhuhai (CN); Suhua Lu, Zhuhai (CN); Yong Xiao, Zhuhai (CN); and Bin Chen, Zhuhai (CN)
Assigned to GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong (CN)
Appl. No. 16/975,083
Filed by GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Guangdong (CN)
PCT Filed Dec. 7, 2018, PCT No. PCT/CN2018/119793
§ 371(c)(1), (2) Date Aug. 21, 2020,
PCT Pub. No. WO2019/174317, PCT Pub. Date Sep. 19, 2019.
Claims priority of application No. 201810218942.5 (CN), filed on Mar. 16, 2018.
Prior Publication US 2021/0091615 A1, Mar. 25, 2021
Int. Cl. H02K 1/27 (2022.01); B60K 1/00 (2006.01); H02K 1/276 (2022.01)
CPC H02K 1/276 (2013.01) [B60K 1/00 (2013.01); H02K 2213/03 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A rotor structure, comprising a rotor body provided with permanent magnet slot groups, wherein the permanent magnet slot groups each comprises:
an outer layer permanent magnet slot;
an inner layer permanent magnet slot, wherein the outer layer permanent magnet slot and the inner layer permanent magnet slot are arranged to be adjacent to each other, and a magnetic conduction path is formed between the outer layer permanent magnet slot and the inner layer permanent magnet slot;
the outer layer permanent magnet slot comprises: a first slot bent relative to the outer layer permanent magnet slot, wherein a first end of the first slot is in communication with the outer layer permanent magnet slot, and a second end of the first slot extends towards an outer edge of the rotor body and spreads gradually away from a direct axis;
a third slot bent relative to the inner layer permanent magnet slot, wherein, a first end of the third slot is in communication with the inner layer permanent magnet slot; the third slot is arranged to be adjacent to the first slot, wherein the third slot is defined by a first side and a second side, the first side being parallel to the first slot and a portion of the second side arranged such that the portion is non-parallel with the first side; and a second end of the third slot extends towards the outer edge of the rotor body and spreads gradually away from the direct axis;
a first outer layer permanent magnet slot segment, wherein, a first end of the first outer layer permanent magnet slot segment extends towards a rotation shaft hole of the rotor body; a second end of the first outer layer permanent magnet slot segment extends towards the outer edge of the rotor body and spreads gradually away from the direct axis; the first slot is in communication with the second end of the first outer layer permanent magnet slot segment; and a first flux barrier is formed between the second end of the first slot and the outer edge of the rotor body; and
a second outer layer permanent magnet slot segment, wherein, a first end of the second outer layer permanent magnet slot segment extends towards the rotation shaft hole; a second end of the second outer layer permanent magnet slot segment extends towards the outer edge of the rotor body and spreads gradually away from the direct axis; the first outer layer permanent magnet slot segment and the second outer layer permanent magnet slot segment are arranged symmetrically relative to the direct axis; and a second flux barrier is formed between the second end of the third slot and the outer edge of the rotor body;
the permanent magnet slot groups each further comprises a second slot, wherein
a first end of the second slot is in communication with the second end of the second outer layer permanent magnet slot segment; the second end of the second slot extends towards the outer edge of the rotor body and spreads gradually away from the direct axis; an angle is formed by a length directional geometric center line of the first slot, and a length directional geometric center line of the second slot; and the first slot and the second slot are arranged symmetrically relative to the direct axis;
A1 denotes a central angle corresponding to an arc of a connection line between a point, at which an extension line of a side wall of the first slot proximate to the direct axis and the outer edge of the rotor body intersect, and a point, at which an extension line of a side wall second slot proximate to the direct axis and the outer edge of the rotor body intersect, and A1>0.63×360°/p, wherein p denotes a number of poles.