Performance comparison of analytical models for rotor eccentricity

A case study of active magnetic bearing

Journal Article (2020)
Author(s)

Zhi Cao (Southeast University)

Yunkai Huang (Southeast University)

Baocheng Guo (Hebei University of Technology)

J. Dong (TU Delft - DC systems, Energy conversion & Storage)

Fei Peng (Southeast University)

Research Group
DC systems, Energy conversion & Storage
Copyright
© 2020 Zhi Cao, Yunkai Huang, Baocheng Guo, J. Dong, Fei Peng
DOI related publication
https://doi.org/10.4283/JMAG.2020.25.2.285
More Info
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Publication Year
2020
Language
English
Copyright
© 2020 Zhi Cao, Yunkai Huang, Baocheng Guo, J. Dong, Fei Peng
Research Group
DC systems, Energy conversion & Storage
Issue number
2
Volume number
25
Pages (from-to)
285-292
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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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