A New Structure for Permanent-Magnet-Biased Axial Hybrid Magnetic Bearings
A New Structure for Permanent-Magnet-Biased Axial Hybrid Magnetic Bearings
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DOI：
10.1109/tmag.2009.2024687
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发表时间：
2009-12-01
影响因子：
2.1
通讯作者：
Xi, Wang
中科院分区：
文献类型：
--
作者：
Jiancheng, Fang;Jinji, Sun;Xi, Wang
提出了一种永磁偏置轴向混合磁轴承的新结构。从传统轴向磁轴承的内部气隙和外部气隙开始，我们首先在永磁体和外壳之间构建了一个新的气隙，我们称之为第二气隙，将偏压磁通路径与控制磁通路径分开。因此，控制磁通路径将具有较低的磁阻，轴向磁轴承的功率损耗将较低。其次，采用等效磁路法、二维有限元法和三维有限元法对轴向混合磁轴承进行了建模和分析。我们设计并组装了一个用于反应飞轮系统的轴向混合磁轴承原型，其角动量为15 N.m.s，速度为5000 r/min。理论分析和样机实验表明，该装置结构简单，力电流和力位移好，运行可靠性高。
We propose a new structure for a permanent-magnet-biased axial hybrid magnetic bearing. Starting with the inner air gap and the outer air gap of conventional axial magnetic bearings, we first construct a novel air gap between the permanent magnet and the outer housing, which we call the second air gap, separating the bias flux paths from the control flux paths. As a result, the control flux paths will have lower reluctance, and the power loss of the axial magnetic bearing will be lower. Next, we modeled this axial hybrid magnetic bearing and analyzed it using the equivalent magnetic circuit method, 2-D finite element method (FEM), and 3-D FEM. We have designed and assembled an axial hybrid magnetic bearing prototype for a reaction flywheel system with angular momentum of 15 N.m.s at a speed of 5000 r/min. The theoretical analysis and the prototype experiments show such advantages as simple structure, good force current and force displacement, and high operating reliability.