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

Journal article (2022)

Authors

Zhi Cao Southeast University
Yunkai Huang Southeast University
Baocheng Guo Nanjing Normal University
Fei Peng Southeast University
J. Dong DC systems, Energy conversion & Storage - EEMCS
Ahmed Hemeida Cairo University
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
Copyright: © 2022 Zhi Cao, Yunkai Huang, Baocheng Guo, Fei Peng, J. Dong, Ahmed Hemeida
DOI: https://doi.org/10.1109/TIE.2021.3102396
Saturation Analytical model Hybrid model Active magnetic bearing (AMB) Magnetic equivalent circuit (MEC) Material nonlinearity Rotor eccentricity Subdomain method
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Published Date

2022

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

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.