Research on Non-directional Differential Control Strategy of Active Magnetic Bearing

doi:10.3901/JME.2022.21.161

Abstract

Abstract: A non-directional differential control method is proposed. By independently controlling each differential magnetic pole pair, the minimum number of differential magnetic pole pairs participating in the control is increased to improve the bearing capacity of the active magnetic bearing. Taking 16-pole radial magnetic bearing as an example, the non-directional differential control method and the conventional differential control method are introduced in detail, and supporting performance such as the equivalent stiffness and equivalent damping, complex stiffness and complex damping, and nominal bearing capacity of the two control methods are compared. Verify the control performance of the system under the two control modes through high-speed rotation test. Theoretical analysis results show that when the non-directional differential control method is adopted, the bearing capacity of the magnetic bearing is increased by 8.24%, and the maximum bearing capacity is increased by 30.657%. The test results show that when the non-directional differential control mode is adopted, the system has a better control effect.

Key words: active magnetic bearing, non-directional differential control, carrying capacity

CLC Number:

TH133

LI Chao, XIE Zhengyu, WU Chuanxiang, WANG Yijian. Research on Non-directional Differential Control Strategy of Active Magnetic Bearing[J]. Journal of Mechanical Engineering, 2022, 58(21): 161-170.

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