Modeling and measurement of capacitive and inductive bearing current in electrical machines
Modeling and measurement of capacitive and inductive bearing current in electrical machines
复制标题
电机中电容性和电感性轴承电流的建模和测量
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
R. D. De Doncker
中科院分区：
文献类型：
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作者：
Andreas Bubert;Jiakun Zhang;R. D. De Doncker
轴承电压是轴承上的电压，端对端轴电压是机器轴两端之间的电压。它们都是由基于逆变器的系统引起的，并且可能导致严重的轴承故障和电磁干扰（EMI）问题。在本文中，一个综合的高频（HF）模型的电动汽车感应电机高达10兆赫，同时计算这两个电压，建立的基础上的物理意义和涡流模型。寄生电容的计算采用三维有限元法（FEM），而其他参数则由阻抗曲线导出。仿真结果与实测信号接近，验证了模型的正确性。
Bearing voltage is the votlage over bearings and end-to-end shaft voltage is the voltage between two ends of the machine shaft. They are all induced by inverter based systems and may cause severe bearing failures and electromagnetic interference (EMI) problems. In this paper a comprehensive high frequency (HF) model of an induction machine for electric vehicles up to 10 Mhz, which simultaneously calculates these two voltages, is established based on physical meaning and eddy-current model. The parasitic capacitances are calculated by 3D Finite Element Method (FEM) while other parameters are derived from impedance curves. The simulation results are close to the measured signals, which validates the model.