Decoupling Structure for Heteropolar Permanent Magnet Biased Radial Magnetic Bearing With Subsidiary Air-Gap
Decoupling Structure for Heteropolar Permanent Magnet Biased Radial Magnetic Bearing With Subsidiary Air-Gap
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DOI：
10.1109/tmag.2014.2312396
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发表时间：
2014-03
影响因子：
2.1
通讯作者：
Shilei Xu;Jinji Sun
中科院分区：
文献类型：
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作者：
Shilei Xu;Jinji Sun
现有的异极型永磁偏置径向磁轴承中，X、Y两个通道的磁路相互耦合，增加了控制系统的设计难度，影响了整个系统的控制精度。提出了一种新型的异极永磁偏置径向磁轴承。该轴承的X、Y磁路相互独立，大大降低了两个通道的磁场耦合。首先，提出的轴承的结构和工作原理进行了论证。利用等效磁路法和虚位移原理，推导出了该磁轴承磁力的解析计算公式。最后，用二维有限元法分析了所设计磁轴承的磁场分布、基本磁力特性和耦合特性。
For existing heteropolar permanent magnet (PM) biased radial magnetic bearing, magnetic circuits in X and Y channels are coupled with each other, which makes it more difficult to design the control system and influence control precision of the whole system. A new heteropolar PM biased radial magnetic bearing is proposed in this paper. The X and Y magnetic circuits of the presented bearing are independent of each other, which decreases the magnetic field coupling of the two channels significantly. First, the structure and working principle of the proposed bearing are demonstrated. Then, the analytical formulas for calculating the magnetic force of this magnetic bearing are deduced using the equivalent magnetic circuit method and virtual displacement principle. Finally, magnetic field distribution, basic magnetic force characteristics, and coupling characteristics of the designed magnetic bearing are analyzed by the 2-D finite-element method.