Evaluation of Magnetic Suspension Performance in a Multi-Consequent-Pole Bearingless Motor
Evaluation of Magnetic Suspension Performance in a Multi-Consequent-Pole Bearingless Motor
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DOI：
10.1109/tmag.2011.2158076
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发表时间：
2011-09
影响因子：
2.1
通讯作者：
J. Asama;R. Nakamura;H. Sugimoto;A. Chiba
中科院分区：
文献类型：
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作者：
J. Asama;R. Nakamura;H. Sugimoto;A. Chiba
无轴承电机在单个电机单元中结合了非接触式磁悬浮和扭矩产生的功能。因此，它具有无需油脂润滑、无污染、免维护等优点。针对低速旋转和摆动工作台(或平台)，作者研制了一种多轴无轴承电机。它有40个极和48个槽，采用双极环形悬浮绕组。与其他低极数无轴承电机相比，多极无轴承电机的优点是悬浮力变化较小。本文的目的是评价无轴承电机的悬浮力性能。悬浮力的实测值与三维有限元计算结果相差21%。结果表明，这种差异是由三维有限元计算中的网格单元个数、制造和装配误差以及铁堆填充系数引起的。
A bearingless motor combines the functions of both noncontact magnetic suspension and torque generation in a single motor unit. Therefore, it offers advantages such as no grease lubrication, no contamination, and can be maintenance free. For low speed rotating and swinging stages (or platforms), the authors have developed a multi-consequent-pole bearingless motor. It has 40 poles and 48 slots with two-pole toroidal suspension windings. The advantage of the multi-pole bearingless motor is its low suspension force variation compared with other bearingless motors with low pole numbers. The aim of this paper is to evaluate the suspension force performance of the bearingless motor. The measured suspension force differed by 21% from the calculated three-dimensional finite element method (3D-FEM) results. It was found that the discrepancy is caused by the number of mesh elements in the 3D-FEM calculation, manufacturing and assembly errors, and the iron stack fill factor.