A Review of Modeling and Mitigation Techniques for Bearing Currents in Electrical Machines With Variable-Frequency Drives
A Review of Modeling and Mitigation Techniques for Bearing Currents in Electrical Machines With Variable-Frequency Drives
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DOI：
10.1109/access.2022.3225119
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发表时间：
2022
期刊：
影响因子：
3.9
通讯作者：
Wenjun Zhu;D. De Gaetano;Xiao Chen;G. Jewell;Yihua Hu
中科院分区：
文献类型：
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作者：
Wenjun Zhu;D. De Gaetano;Xiao Chen;G. Jewell;Yihua Hu
变频器在变频器中的切换会在电机绕组和变频器接地之间产生高频共模电压，导致高频寄生电流流过机器轴承，除非在设计和安装时采取预防措施。轴承中的这些寄生和意外电流会导致润滑膜的劣化和轴承滚动元件的表面损坏。随着开关上升时间更快的宽禁带半导体开始在变频驱动器中变得更加普遍，这些问题将会加剧。本文综述了逆变器供电交流传动系统中高频轴承电流的建模和抑制技术。它旨在为研究界进一步了解轴承电流现象提供坚实的基础，并帮助找到新的改进技术来缓解和测量轴承电流现象。
The converter switching in variable-frequency drives can generate high frequency common mode voltage between the machine winding and the converter ground, leading to high frequency parasitic currents which can flow through the machine bearings unless precautions are taken in design and installation. These parasitic and unintended currents in the bearings cause deterioration of the lubrication film and surface damage to the rolling elements of the bearings. These problems will be exacerbated as wide-bandgap semiconductors with faster switching rise times start becoming more widespread in variable-frequency drives. This paper reviews the modelling and mitigation techniques of high frequency bearing currents in inverter fed AC drives. It aims to provide a solid base for the research community to further understanding the bearing currents phenomenon and helping to find novel improved technique for their mitigation and measurement.