This paper presents a novel bearingless synchronous reluctance slice motor topology that contains no permanent magnets. The rotor with two iron poles and flux barriers is levitated and rotated through a stator winding system with six coils wired as two three-phase systems. A constant rotor-oriented magnetization current is applied to generate a magnetic bias flux. The system can be controlled similar to a bearingless permanent magnet synchronous slice motor and provides passive stabilization of axial and tilting movements of the rotor. The motor topology is discussed in detail and a prototype implementation is presented. Its performance with regard to passive properties, achievable torque, controllability, and wide air gap suitability is benchmarked against two other designs that contain permanent magnets either in the rotor or the stator. A loss analysis of all topologies is performed and suitable application areas are identified. The proposed design provides an interesting alternative to existing bearingless slice motor topologies in applications that require high rotational speeds, high process or ambient temperatures, or a disposable low-cost rotor with short exchange intervals.

中文翻译：

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新型无磁铁无轴承同步磁阻片式电动机的性能基准测试

本文提出了一种不包含永磁体的新型无轴承同步磁阻片式电动机拓扑。具有两个铁极和磁通屏障的转子通过一个定子绕组系统悬浮并旋转，该定子绕组系统具有六个以两个三相系统连接的线圈。施加恒定的转子定向磁化电流以生成磁偏磁通量。该系统可以像无轴承永磁同步片式电动机一样进行控制，并提供转子轴向和倾斜运动的被动稳定性。详细讨论了电机拓扑，并给出了原型实现。它在无源性能，可实现的扭矩，可控制性和宽气隙适用性方面的性能已与其他两种在转子或定子中均包含永磁体的设计进行了基准测试。对所有拓扑进行损耗分析，并确定合适的应用领域。所提出的设计为需要高转速，高过程或环境温度或具有短更换间隔的一次性低成本转子的应用提供了一种有趣的替代方法，可以替代现有的无轴承片式电动机拓扑。