容错控制下电磁轴承磁极故障磁场解析

doi:10.16180/j.cnki.issn1007-7820.2021.11.013

Abstract

Abstract:

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

WANG Jialiang,JIANG Kejian,ZHU Fangfu. Magnetic Field Analysis of Magnetic Bearing Pole Fault under Fault-Tolerant Control[J].Electronic Science and Technology, 2021, 34(11): 81-87.

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References 18

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磁极数量	磁通密度/mT	电流利用率/%
4极	301.865	97.21
6极	304.272	97.99
8极	305.712	98.45
10极	307.158	98.92
12极	308.326	99.29
14极	308.878	99.47

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

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