Performance comparison of analytical models for rotor eccentricity: A case study of active magnetic bearing

Zhi Cao, Yunkai Huang, Baocheng Guo, Jianning Dong, Fei Peng

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
16 Downloads (Pure)

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.

Original languageEnglish
Pages (from-to)285-292
Number of pages8
JournalJournal of Magnetics
Volume25
Issue number2
DOIs
Publication statusPublished - 2020

Keywords

  • Active magnetic bearing (AMB)
  • Analytical models
  • Perturbation method
  • Sub-domain method
  • Superposition method

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