Suspension Force-Coupling Analysis of Flux-Reversal Bearingless Slice Motor Based on Advanced Magnetic Field Model

Liu, Jiayun; Qu, Ronghai; Li, Dawei; Kong, Wubin; Zou, Tianjie; Sun, Xiaodong

Abstract

Flux-reversal bearingless slice motor with direct suspension current (DC-FRBLM) is a novel slice bearingless motor. The robust rotor structure of the DC-FRBLM brings benefits including high compactness and ease of manufacturing. However, the disparate frequencies of torque current and suspension currents cause undesirable suspension force-coupling in different radial directions. This feature leads to rotor vibrations and poses challenges for suspension control. To addresses these issues, an advanced magnetic field model and a suspension decoupling control strategy based on this model are proposed in this paper. The proposed model incorporates a precise double-salient permeance model, accounting for variations in rotor magnetic potential and leakage flux. The accurate calculation of the active radial force is achieved using the Maxwell stress tensor method, which agrees well with the finite element analysis (FEA) results. Then an analysis is conducted to identify the magnetic field components responsible for suspension force-coupling. Furthermore, the decoupling strategy based on the proposed analytical model effectively reduces force fluctuation and mitigates rotor vibrations. Experimental results on a prototype of DC-FRBLM validate the improved levitation performance achieved by the proposed decoupling strategy.

Citation

Liu, J., Qu, R., Li, D., Kong, W., Zou, T., & Sun, X. (2024). Suspension Force-Coupling Analysis of Flux-Reversal Bearingless Slice Motor Based on Advanced Magnetic Field Model. IEEE Transactions on Transportation Electrification, 10(4), 8189-8198. https://doi.org/10.1109/TTE.2024.3370242

• Journal Article Type: Article
• Acceptance Date: Feb 26, 2024
• Online Publication Date: Feb 26, 2024
• Publication Date: 2024-12
• Deposit Date: May 27, 2024
• Publicly Available Date: May 30, 2024
• Journal: IEEE Transactions on Transportation Electrification
• Electronic ISSN: 2332-7782
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 4
• Pages: 8189-8198
• DOI: https://doi.org/10.1109/TTE.2024.3370242
• Keywords: Electrical and Electronic Engineering, Energy Engineering and Power Technology, Transportation, Automotive Engineering
• Public URL: https://nottingham-repository.worktribe.com/output/32450584
• Publisher URL: https://ieeexplore.ieee.org/document/10445346
• Additional Information: © 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.