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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奇偶极对数宽气隙磁通切换无轴承电机


本文介绍了一种带有无磁转子的无轴承电机拓扑，与之前发布的拓扑相比，该拓扑可提供更高的转子扭矩密度和更宽的磁气隙。通过使用仅包含永磁体的镜腿配置中只有八个齿的定子，可以最大限度地减少杂散磁通。电机性能基于实验原型进行分析，该实验原型是使用 3D FEM 仿真设计的，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。所实施的原型达到了 2000 rpm 的转速和 8 Nm 的最大扭矩。