Performance comparison of analytical models for rotor eccentricity

A case study of active magnetic bearing

Journal article (2020)

Authors

Zhi Cao Southeast University
Yunkai Huang Southeast University
Baocheng Guo Hebei University of Technology
J. Dong DC systems, Energy conversion & Storage - EEMCS
Fei Peng Southeast University
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
Copyright: © 2020 Zhi Cao, Yunkai Huang, Baocheng Guo, J. Dong, Fei Peng
DOI: https://doi.org/10.4283/JMAG.2020.25.2.285
Analytical models Active magnetic bearing (AMB) Perturbation method Sub-domain method Superposition method
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Published Date

2020

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

This paper applies two different analytical methods, i.e., the perturbation method and superposition method, to calculate the magnetic flux density distribution and the magnetic force of the active magnetic bearing (AMB) with the rotor eccentricity. These two methods are thoroughly analyzed, compared and validated by the finite element model (FEM). The perturbation method is theoretically complex while the superposition method is intuitive. The valid range of the superposition method is larger than the perturbation method. However, the superposition method requires longer computation time. The main contribution of this paper is assessing the effectiveness of two analytical methods for predicting the AMB performance with the rotor eccentricity and giving a comprehensive guideline for engineers to choose the proper analytical method to design AMB.

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