Performance Benchmarking of a Novel Magnet-Free Bearingless Synchronous Reluctance Slice Motor
Performance Benchmarking of a Novel Magnet-Free Bearingless Synchronous Reluctance Slice Motor
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DOI：
10.1109/ojies.2020.3011926
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发表时间：
2020-01-01
影响因子：
8.5
通讯作者：
Kolar, Johann W.
中科院分区：
文献类型：
--
作者：
Holenstein, Thomas;Schuck, Marcel;Kolar, Johann W.
提出了一种不含永磁体的无轴承同步磁阻片电机拓扑结构。具有两个铁极和磁通屏障的转子悬浮并通过由六个线圈组成的两个三相系统的定子绕组系统旋转。施加恒定的转子定向磁化电流以产生偏磁通。该系统可以控制类似于无轴承永磁同步片电机，并提供转子轴向和倾斜运动的被动稳定。详细讨论了电机的拓扑结构，并给出了一个原型实现。它在被动特性、可实现扭矩、可控性和宽气隙适用性方面的性能与转子或定子中包含永磁体的其他两种设计相比较。执行所有拓扑的损耗分析，并确定合适的应用领域。所提出的设计为需要高转速，高工艺或环境温度或短交换间隔的一次性低成本转子的应用提供了现有无轴承切片电机拓扑的有趣替代方案。
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.