Support Stiffness of Magnetic Bearing Based on Unequal Magnetic Circuit Area Design Method

被引：0
|
作者：
Hu Y. [1 ,2 ]
Li L. [1 ]
Guo W. [2 ]
Li X. [2 ]
机构：
[1] Deptment of Electrical Engineering, Harbin Institute of Technology, Harbin
[2] Gree Electric Appliance Inc. of Zhuhai, Zhuhai
来源：
Xinan Jiaotong Daxue Xuebao/Journal of Southwest Jiaotong University | 2022年 / 57卷 / 03期
关键词：
Magnetic bearing; Structure optimization; Support stiffness; Unequal magnetic circuit area;
D O I：
10.3969/j.issn.0258-2724.20210888
中图分类号：
学科分类号：
摘要：
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. Copyright ©2022 JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY. All rights reserved.
引用
收藏
页码：648 / 656
页数：8
相关论文
共 13 条
  • [1] XU Y P, SHEN Q, ZHANG Y, Et al., Dynamic modeling of the active magnetic bearing system operating in base motion condition, IEEE Access, 8, pp. 166003-166013, (2020)
  • [2] KIM C S, JUNG H H, PARK B K., A study on the optimal design for a magnetic bearing-rotor with maximum stiffness using a genetic algorithm, Journal of the Korean Society of Manufacturing Process Engineers, 12, 6, pp. 167-174, (2013)
  • [3] YANG G J, XU Y, SHI Z G, Et al., Characteristic analysis of rotor dynamics and experiments of active magnetic bearing for HTR-10GT, Nuclear Engineering and Design, 237, 12, pp. 1363-1371, (2007)
  • [4] JUNG H H, KANG S H, CHO B H, Et al., A design technique for a magnetic bearing-rotor in a turbo blower considering critical speeds, Advanced Materials Research, 569, pp. 564-567, (2012)
  • [5] FUJIWARA H, YANAGIHARA K, MATSUSHITA O, Et al., Design of active magnetic bearing rotors and their control method for passing through fourth bending critical speed, Mechanical Engineering Journal, 6, 3, pp. 004811-0048111, (2019)
  • [6] REN Zhengyi, ZHU Jianguo, YANG Liping, Calculation and analysis on critical speed of flywheel rotor based on ANSYS workbench, Mechanical Engineer, 9, pp. 23-24, (2019)
  • [7] JIANG Qilong, HU Zhenqiu, Improved incomplete derivative PID control of axial active magnetic bearing, Journal of Southwest Jiaotong University, 50, 2, pp. 241-246, (2015)
  • [8] LI Songqi, ZHANG Kunlun, Self-excited vibration of single-magnet suspension system: stability analysis and inhibition, Journal of Southwest Jiaotong University, 50, 3, pp. 410-416, (2015)
  • [9] CHITTLANGIA V, LIJESH K P, AKASH K, Et al., Optimum design of an active magnetic bearing considering the geometric constraints, Technology Letters, 1, 3, pp. 23-30, (2014)
  • [10] LIJESH K P, HIRANI H., Optimization of eight pole radial active magnetic bearing, Journal of Tribology, 137, 2, (2015)
12