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首页> 外文期刊>Magnetics, IEEE Transactions on >A New Structure for Permanent-Magnet-Biased Axial Hybrid Magnetic Bearings
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A New Structure for Permanent-Magnet-Biased Axial Hybrid Magnetic Bearings

机译：永磁偏置轴向混合电磁轴承的新结构

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摘要

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 $hbox{N}!cdot!hbox{m}!cdot!hbox{s}$ 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.
机译：我们提出了一种用于永磁偏置轴向混合磁轴承的新结构。从常规轴向磁性轴承的内部空气间隙和外部空气间隙开始，我们首先在永磁体和外壳之间构造一个新颖的空气间隙，我们将其称为第二空气间隙，将偏置磁通路径与控制磁通分开路径。结果，控制磁通路径将具有较低的磁阻，并且轴向磁轴承的功率损耗将较低。接下来，我们对该轴向混合磁轴承建模，并使用等效磁路法，2-D有限元法（FEM）和3-D FEM对其进行了分析。我们已经为反飞轮系统设计并组装了一个轴向混合电磁轴承原型，该反飞轮系统的角动量为15 $ hbox {N}！cdot！hbox {m}！cdot！hbox {s} $，转速为5000 r / min。理论分析和样机实验表明，具有结构简单，受力电流和受力位移好，工作可靠性高等优点。

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