- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | HU Yusheng, LI Liyi, GUO Weilin, LI Xin. Support Stiffness of Magnetic Bearing Based on Unequal Magnetic Circuit Area Design Method[J]. Journal of Southwest Jiaotong University, 2022, 57(3): 648-656. doi: 10.3969/j.issn.0258-2724.20210888
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The magnetic suspension rotor needs to meet the requirements of anti-interference and resonance isolation at the same time, in order to lay the design foundation from the perspective of magnetic bearing structure, the design method of high stiffness magnetic bearing is studied based on the influence of magnetic bearing structural parameters on support stiffness. Firstly, through the derivation of the analytical formula of the stiffness of the magnetic bearing, the influencing factors of the structural parameters on the support stiffness are analyzed, and the optimization direction of the support stiffness is determined; Secondly, the design method of high stiffness magnetic bearing is proposed, and the optimization effect of support stiffness is analyzed; Finally, the feasibility of the proposed method is verified by rotor natural frequency test and compressor frequency rise experiment. The results show that in the compressor prototype, when the magnetic bearing adopts the structure of unequal magnetic circuit area with the tooth yoke width ratio 1.2, the support stiffness of the magnetic bearing under the worst working condition, that is, the maximum control current, can improve by 25% compared with the equal magnetic circuit area, and the compressor can effectively avoid resonance in the operating range, which provides a reference for the optimization design of the support stiffness of magnetic bearing in engineering application.
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