US 12,463,478 B2
Rotor, permanent-magnet motor, motor drive system, and vehicle
Xin Huang, Shanghai (CN); Mengde Li, Shanghai (CN); Hui Yang, Nanjing (CN); and Heyun Lin, Nanjing (CN)
Assigned to Shenzhen Yinwang Intelligent Technologies Co., Ltd., Shenzhen (CN)
Filed by Shenzhen Yinwang Intelligent Technologies Co., Ltd., Shenzhen (CN)
Filed on Oct. 20, 2022, as Appl. No. 18/048,424.
Application 18/048,424 is a continuation of application No. PCT/CN2020/088525, filed on Apr. 30, 2020.
Prior Publication US 2023/0108575 A1, Apr. 6, 2023
Int. Cl. H02K 1/27 (2022.01); B60K 1/00 (2006.01); H02K 1/02 (2006.01); H02K 1/276 (2022.01)
CPC H02K 1/2773 (2013.01) [B60K 1/00 (2013.01); H02K 1/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotor of a permanent-magnet motor, comprising:
a rotating shaft;
a rotor iron core sleeved on the rotating shaft; and
several first permanent-magnet structures distributed on the rotor iron core in a circumferential direction of the rotor iron core, wherein each first permanent-magnet structure comprises a first permanent magnet and a second permanent magnet that are disposed in a radial direction of the rotor iron core, and are configured to generate coercive forces such that a coercive force of the first permanent magnet is less than coercive force of the second permanent magnet,
wherein a first line connecting two ends of the first permanent magnet, when extended, passes through the rotating shaft, and a second line connecting two ends of the second permanent magnet, when extended, passes through the rotating shaft;
wherein the first permanent magnet and the second permanent magnet are non-contacting and parallel to each other; and
wherein a magnetization degree and a demagnetization degree of the first permanent magnet are used to control and regulate main flux of an air gap, so that a part of main flux generated by the second permanent magnet is short-circuited.