US 12,476,564 B2
Low-vibration fault-tolerant current algorithm for open-phase faults of six-phase permanent magnet motors
Jinghua Ji, Zhenjiang (CN); Yunhan Zhou, Zhenjiang (CN); Wenxiang Zhao, Zhenjiang (CN); Tao Tao, Zhenjiang (CN); and Shengdao Zhu, Zhenjiang (CN)
Assigned to JIANGSU UNIVERSITY, Zhenjiang (CN)
Appl. No. 18/271,239
Filed by JIANGSU UNIVERSITY, Zhenjiang (CN)
PCT Filed Nov. 10, 2022, PCT No. PCT/CN2022/131129
§ 371(c)(1), (2) Date Aug. 2, 2024,
PCT Pub. No. WO2024/087255, PCT Pub. Date May 2, 2024.
Claims priority of application No. 202211301717.0 (CN), filed on Oct. 24, 2022.
Prior Publication US 2025/0323590 A1, Oct. 16, 2025
Int. Cl. H02P 21/05 (2006.01); H02P 21/14 (2016.01); H02P 25/22 (2006.01)
CPC H02P 21/05 (2013.01) [H02P 21/14 (2013.01); H02P 25/22 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A low-vibration fault-tolerant current algorithm for open-phase faults of six-phase permanent magnet motors, comprising specific steps as follows:
step 1: establishing an electromagnetic simulation model of the motor and simulating a torque, magnetomotive force distribution, and radial force distribution of the six-phase permanent magnet motor under a healthy operation, and measuring a vibration response of the motor;
step 2: dividing different types of open-phase faults of the six-phase permanent magnet motor, simulating the torque and magnetomotive force distribution under different open-phase faults, and simulating the radial force distribution and vibration response under different open-phase faults;
step 3: based on a difference in magnetomotive force distribution under different open-phase faults, designing a synthetic magnetomotive force of remaining phase windings under different open-phase faults;
step 4: according to a reconfiguration scheme of the synthetic magnetomotive force of the remaining phase windings, determining a phase angle of a remaining phase current, and solving for an expression for low-vibration fault-tolerant current; and
step 5: substituting the calculated expression for low-vibration fault-tolerant current into the simulation model and simulating the radial force distribution under a fault-tolerant operation, and verifying an improvement in the vibration response under the fault-tolerant operation.