Electronic Science and Technology ›› 2021, Vol. 34 ›› Issue (11): 81-87.doi: 10.16180/j.cnki.issn1007-7820.2021.11.013

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Magnetic Field Analysis of Magnetic Bearing Pole Fault under Fault-Tolerant Control

WANG Jialiang,JIANG Kejian,ZHU Fangfu   

  1. School of Information Science and Technology,Zhejiang Sci-Tech University,Hangzhou 310018,China
  • Received:2020-07-17 Online:2021-11-15 Published:2021-11-16
  • Supported by:
    National Natural Science Foundation of China(11272288);Natural Science Foundation of Zhejiang(LY18E050017)


When an AMB has a magnetic pole failure under fault-tolerant control, the magnetic coupling between the magnetic poles and the nonlinearity of the electromagnetic force make it impossible to generate the required electromagnetic force on the magnetic pole surface, which will has a greater impact on the suspension of the rotor. To solve this problem, in this study, finite element software is used to simulate and analyze the magnetic field distribution of the AMB with strong coupling and weak coupling structure when single and two magnetic pole failures occur, and the influence of these two structures on the suspension of the rotor is compared and analyzed from the perspective of the magnetic field. In view of the fact that there is more magnetic flux leakage in the gap between the two magnetic poles of 8-pole radial AMB, the AMB generally can only control the magnetic flux on the magnetic poles, the magnetic flux density of the air gap between the rotors is simulated and analyzed. The simulation results show that the current utilization rate of the 12-pole AMB exceeds 99%, which effectively reduces the magnetic flux leakage.

Key words: active magnetic bearing, fault-tolerant, pole failure, magnetic field, topology, simulation analysis

CLC Number: 

  • TN99