Evaluation of a Bearingless PM Motor With Wide Magnetic Gaps
Evaluation of a Bearingless PM Motor With Wide Magnetic Gaps
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DOI：
10.1109/tec.2010.2040828
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发表时间：
2010-03
影响因子：
4.9
通讯作者：
J. Asama;M. Amada;N. Tanabe;N. Miyamoto;A. Chiba;S. Iwasaki;M. Takemoto;T. Fukao;M. A. Rahman
中科院分区：
文献类型：
--
作者：
J. Asama;M. Amada;N. Tanabe;N. Miyamoto;A. Chiba;S. Iwasaki;M. Takemoto;T. Fukao;M. A. Rahman
提出了一种新型的无接触驱动系统，该系统采用了一种顺极式无轴承永磁电动机和一种推力磁轴承。这种无轴承电动机具有宽的磁隙。由于磁阻的增加，宽磁隙可能导致径向磁悬浮力的减小。由于离心泵应用中存在很强的推力，因此在轴的端部安装了推力磁轴承。在本文中，磁悬浮力和旋转特性的实验样机进行评估，而转子磁悬浮。实验结果也进行了比较，使用有限元方法的计算。结果表明，所研制的顺极式无轴承永磁电机具有足够的磁悬浮力实现无接触运行。
A new noncontact drive system has been developed employing a consequent-pole-type bearingless permanent magnet (PM) motor and a thrust magnetic bearing. This bearingless motor has a wide magnetic gap. The wide magnetic gap may cause a decrease in radial magnetic suspension force because of an increase in magnetic reluctance. A thrust magnetic bearing is installed at the end of the shaft because strong thrust force exists in centrifugal pump applications. In this paper, the magnetic suspension forces and rotation characteristics of the experimental prototype are evaluated while the rotor is magnetically suspended. Experimental results are also compared to the calculated ones using the finite-element method. It is demonstrated that the developed consequent-pole-type bearingless PM motor possesses sufficient magnetic suspension force for noncontact operation.