This paper introduces a bearingless motor topology with a magnet-free rotor that provides a higher rotor torque density and wider magnetic air gap compared to previously published topologies. The stray flux is minimized by using a stator with only eight teeth in temple configuration that contain permanent magnets. The motor performance is analyzed based on experimental prototypes, that were designed using 3D FEM simulations, for even and odd rotor pole pair numbers of six and nine, respectively. Control schemes that compensate parasitic radial forces to achieve stable magnetic levitation of the rotors are presented. The implemented prototypes reached a rotational speed of 2000 rpm and a maximum torque of 8 Nm.

中文翻译：

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奇偶极数的宽气隙磁通开关无轴承电动机

本文介绍了一种无轴承电机拓扑结构，该结构具有无磁铁转子，与先前发布的拓扑结构相比，该拓扑结构提供了更高的转子转矩密度和更宽的磁性气隙。通过使用仅带有八个齿的定子定子，杂散磁通量在边撑结构中包含永久磁铁，从而使杂散磁通最小。基于实验原型对电机性能进行分析，该实验原型是使用3D FEM仿真设计的，分别针对偶数和奇数转子极对数分别为6和9。提出了补偿寄生径向力以实现转子稳定磁悬浮的控制方案。实施的原型机达到2000 rpm的转速和8 Nm的最大扭矩。