Magnetic force characteristics of a novel permanent magnet biased axial magnetic bearing

被引：0
|
作者：
Liu H. [1 ,2 ]
Fang J. [1 ,2 ]
机构：
[1] School of Instrument Science and Opto-electronics Engineering, Beihang University
[2] Key Laboratory of Fundamental Science for National Defense, Beihang University
来源：
Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2010年 / 46卷 / 08期
关键词：
Axial magnetic bearing; Equivalent magnetic circuit; Integral method; Magnetic force characteristic; Permanent magnet bias;
D O I：
10.3901/JME.2010.08.167
中图分类号：
学科分类号：
摘要：
To solve the contradiction between axial dimension and precision of magnetic bearing system, the magnetic force characteristics of a novel permanent magnet biased axial magnetic bearing which integrates rotor radial torsion with axial translation control function is researched. Equivalent magnetic circuit method is used to carry out modeling of magnetic circuit of magnetic bearing. Integral calculation formula of magnetic force of magnetic bearing is given on the basis of the magnetic circuit model, the magnetic force characteristic curve of the closed-loop system of magnetic bearing is obtained. The analysis on the magnetic bearing used on a flywheel shows that there exists good relationship between the magnetic force of magnetic bearing and the magnetic pole air gap and control current, and all the control channels are approximately decoupled. Compared to the typical magnetic bearing structure, the proposed one helps to improve the control accuracy and reduce the axial dimension of the magnetic bearing system. It is suitable for magnetic suspension flywheel system. © 2010 Journal of Mechanical Engineering.
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页码：167 / 174
页数：7
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