A Novel Hybrid Analytical Model of Active Magnetic Bearing Considering Rotor Eccentricity and Local Saturation Effect

Zhi Cao, Yunkai Huang*, Baocheng Guo, Fei Peng, J. N. Dong, Ahmed Hemeida

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

To facilitate the active magnetic bearing (AMB) design and analysis, an accurate and fast model that considers both rotor eccentricity and the saturation effect is necessary. In this article, a novel hybrid analytical model (HAM) for effective calculation of the magnetic field of the AMB is proposed. Eccentricity and local saturation are considered in the proposed HAM. In the proposed HAM, the stator and rotor are modeled by elementary subdomains (ESDs) and the air-gap is modeled by magnetic equivalent circuit (MEC). Direct coupling between the solutions in the ESD regions with MEC completes the whole model matrices. Compared to the existing literature, the proposed model considers both the rotor eccentricity and material nonlinearity. The effectiveness and accuracy of the proposed HAM are validated by both the finite element model and experimental results. The results show that the proposed HAM can accurately predict the magnetic quantities of the AMB.

Original languageEnglish
Pages (from-to)7151-7160
Number of pages10
JournalIEEE Transactions on Industrial Electronics
Volume69
Issue number7
DOIs
Publication statusPublished - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • Active magnetic bearing (AMB)
  • analytical model
  • hybrid model
  • magnetic equivalent circuit (MEC)
  • material nonlinearity
  • rotor eccentricity
  • saturation
  • subdomain method

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