Reduction of force interference and performance improvement of a consequent-pole bearingless motor
Reduction of force interference and performance improvement of a consequent-pole bearingless motor
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DOI：
10.1016/j.precisioneng.2011.05.002
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发表时间：
2012-01-01
影响因子：
3.6
通讯作者：
Chiba, Akira
中科院分区：
文献类型：
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作者：
Asama, Junichi;Kawata, Ryo;Chiba, Akira
无轴承电机将磁悬浮和扭矩产生的功能结合在一个电机中。结果极型无轴承电机已经被提出。与传统的无轴承电机相比，它不需要在悬挂力和扭矩之间进行权衡。此外，在不检测旋转角度的情况下，可以实现稳定的悬挂。然而，x轴电流的一部分在y轴上产生了不希望的力。这种力干涉影响无轴承电机的性能，因此应消除这种干涉。在本文中，作者提出了一种优化的结果极无轴承电机绕组设计，以减少悬架力的干扰。利用无轴承电机的磁动势分布，对径向悬架力进行了数值计算，并与有限元分析结果进行了比较。为了验证该理论，进行了静态和动态性能试验。结果表明，改进后的绕线结构与之前的绕线结构相比，悬架力干扰降低了90%。还发现径向轴振动和功耗显著降低，分别降低了约16%和44%。(C) 2011爱思唯尔公司版权所有。
A bearingless motor combines the functions of both magnetic suspension and torque generation together in a single motor. A consequent-pole type of bearingless motor has already been proposed. In contrast to conventional bearingless motors, it is free from the trade-off between suspension force and torque. In addition, stable suspension can be achieved without detecting the rotational angle. However, a part of the X-axis current generates undesirable force in the Y-axis. This force interference influences the performances of bearingless motors: thus, the interference should be eliminated. In this paper, the authors propose an optimal winding design of the consequent-pole bearingless motor to minimize the suspension force interference. Here, the suspension forces in the radial direction are numerically calculated using the magneto-motive force distribution of the bearingless motor, and are compared with the analytical results of finite element method. To verify the theory, static and dynamic performance tests were carried out. It was found that the improved winding configuration significantly reduced the suspension force interference by 90% compared with the previous winding configuration. It was also found that the radial shaft vibration and the power consumption were considerably decreased, by approximately 16% and 44%, respectively. (C) 2011 Elsevier Inc. All rights reserved.