Eddy current effect in a magnetic bearing model
Eddy current effect in a magnetic bearing model
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DOI：
10.1109/tmag.1983.1062684
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发表时间：
1983-09
影响因子：
2.1
通讯作者：
T. Yoshimoto
中科院分区：
文献类型：
--
作者：
T. Yoshimoto
本文讨论了一个简单磁轴承模型中的涡流问题。在使用实心钢作为轴材料的情况下，这样的问题非常重要。本文对一个假想的简化模型，用有限元法进行了涡流效应的计算。在不同的转子转速下，气隙和轴材料中的磁通分布图。我们可以清楚地看到轴中感应的涡流如何影响电磁铁的主磁通。产生电磁铁主磁通的电流分布形式为正弦和矩形两种。我们还计算了吸引力和反转矩与转子速度的特性。该模型适用于检验各种参数的影响。在我们的计算结果中没有发现可疑的坚固方面。这证实了我们的细分方法是好的。我们的研究结果可以预测实际的性能趋势，并知道受涡流影响较小的工作区域。
Eddy current problem in a simple magnetic bearing model is treated. Such a problem is very important in the case when solid steel is used as a shaft material. We have made the calculation about eddy current effect on a hypothetical, simplified model by finite element method. Diagrams of flux distribution in both the airgap and the shaft material are obtained at various rotor speeds. We can clearly see how eddy current induced in a shaft affects main flux of electromagnets. The form of current distribution for producing main flux of electromagnets is taken as both sinusoidal and rectangular. We have also calculated the characteristics of attractive force and counter torque vs. rotor speed. This model is suitable for examining effects of various parameters. No suspicious rugged aspects were perceived in our calculation results. This confirms that our way of making subdivision is good. Our results make it possible to predict the realistic performance tendency and to know the working region less affected by eddy current.