Effects of the randomness of winding distribution in slot on the bearing voltage and the electric discharge machining bearing current
Effects of the randomness of winding distribution in slot on the bearing voltage and the electric discharge machining bearing current
复制标题
槽内绕组分布的随机性对轴承电压和放电加工轴承电流的影响
DOI：
10.1049/icp.2022.1131
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Zhu W
中科院分区：
文献类型：
--
作者：
Zhu W
三相PWM逆变器产生的高频开关电压波形在机器绕组中产生共模电压。这种共模电压对轴承有潜在的危害，并可能导致通过机器中的寄生电容产生放电加工（EDM）轴承电流。本文提出了一种计算随机绕组寄生电容的详细模型。对均匀放置绕组和随机放置绕组的轴承电压和电火花加工轴承电流进行了比较。该详细的绕组模型的优点是考虑了端部绕组效应、匝间电容和绕组分布的随机性，提高了精度，因此适用于研究机械传动中的其他高频现象，如沿绕组的电压应力和电磁干扰。
High frequency switching voltage waveforms from three-phase PWM inverters generate common mode voltage in machine windings. This common mode voltage is potentially harmful to the bearings and can lead to electric discharge machining (EDM) bearing current through the parasitic capacitance in the machine. This paper presents a detailed model to calculate the parasitic capacitance in random wound windings. Comparison has been made with the uniform placed winding and the random placed winding in terms of both the bearing voltage and the EDM bearing current. The advantage of this detailed winding model is that it takes the end-winding effect, the turn-to-turn capacitance, and the randomness of winding distribution into account, which improves the accuracy and hence it is suitable for other studies of high frequency phenomenon in machine drives such as the voltage stress along the windings and the electromagnetic interference.