A novel six-pole five degrees of freedom (5-DOF) ac hybrid magnetic bearing (HMB) is put forward in this article, which can obtain large suspension force density, high critical speed, and reduce the nonlinearity of radial suspension force. First, the structure and suspension principle are introduced in detail and then the mathematical models of the radial and axial suspension force are derived based on the equivalent magnetic circuit analysis. Second, the main parameters are designed according to the given maximum radial and axial bearing capacities. Finally, the prototype of the six-pole 5-DOF ac HMB is established by the 3-D finite-element analysis software Magnet. Moreover, the electromagnetic analysis is carried out to verify the rationality of the magnetic circuits and suspension mechanism. Furthermore, the force-current relationships are calculated. The research results have shown that the proposed six-pole 5-DOF ac HMB has reasonable structure and good suspension performances.

中文翻译：

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六极五自由度交流混合磁力轴承结构及悬挂力分析


本文提出了一种新型六极五自由度（5-DOF）交流混合磁轴承（HMB），可以获得大的悬浮力密度、高的临界转速，并降低径向悬浮力的非线性。首先详细介绍了其结构和悬挂原理，然后基于等效磁路分析推导了径向和轴向悬挂力的数学模型。其次，主要参数根据给定的最大径向和轴向承载能力进行设计。最后，利用3D有限元分析软件Magnet建立了六极五自由度ac HMB的原型。此外，还进行了电磁分析，验证了磁路和悬挂机构的合理性。此外，还计算了力-电流关系。研究结果表明，所提出的六极五自由度交流HMB具有合理的结构和良好的悬架性能。