US 11,855,488 B2
Motor rotor structure and permanent magnet motor
Min Wang, Zhuhai (CN); Bin Chen, Zhuhai (CN); and Yong Xiao, Zhuhai (CN)
Assigned to GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Zhuhai (CN)
Appl. No. 17/277,730
Filed by GREE ELECTRIC APPLIANCES, INC. OF ZHUHAI, Zhuhai (CN)
PCT Filed Sep. 2, 2019, PCT No. PCT/CN2019/103974
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/093773, PCT Pub. Date May 14, 2020.
Claims priority of application No. 201811324647.4 (CN), filed on Nov. 8, 2018.
Prior Publication US 2021/0351646 A1, Nov. 11, 2021
Int. Cl. H02K 1/276 (2022.01)
CPC H02K 1/276 (2013.01) [H02K 2213/03 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A motor rotor structure, comprising: a rotor core, wherein:
at least two first permanent magnet slots are disposed in the rotor core in a circumferential direction;
at least one second permanent magnet slot is disposed between every two adjacent first permanent magnet slots ; each of the first permanent magnet slots and an adjacent second permanent magnet slot thereof are spaced a preset distance apart; and
between two kinds of permanent magnets having different coercivities, a first kind of permanent magnet is mounted in each of the first permanent magnet slots , and a second kind of permanent magnet is mounted in the second permanent magnet slot;
when identical polarities of adjacent two kinds of permanent magnets having different coercivities face each other, the rotor core is in a more-magnetic-pole state; and
when contrary polarities of adjacent two kinds of permanent magnets having different coercivities face each other, the rotor core is in a fewer-magnetic-pole state.