An evaluation of the electrostatic shielded induction motor: a solution for rotor shaft voltage buildup and bearing current
An evaluation of the electrostatic shielded induction motor: a solution for rotor shaft voltage buildup and bearing current
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DOI：
10.1109/ias.1996.557099
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发表时间：
1996-10
期刊：
影响因子：
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通讯作者：
Doyle F. Busse;Jay Erdman;R. Kerkman;D. Schlegel;G. Skibinski
中科院分区：
文献类型：
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作者：
Doyle F. Busse;Jay Erdman;R. Kerkman;D. Schlegel;G. Skibinski
本文对一种新型感应电机——静电屏蔽感应电机（ESIM）进行了评价。ESIM将转子轴电压降低到低于轴承润滑油电场强度击穿水平的水平，并为脉宽调制（PWM）逆变器引起的凹槽引起的轴承加速磨损提供了一种解决方案。本文首先回顾了在PWM电压源逆变器上运行时的轴电压和产生的轴承电流。给出了一个轴承槽的实例，并对系统模型进行了讨论。介绍了几种esim的结构细节和测试结果。实验结果表明，该方法在不降低电机电磁性能的前提下，解决了静电感应转子轴电压和轴承问题。
This paper evaluates a new induction motor, the electrostatic shielded induction motor (ESIM). An ESIM reduces rotor shaft voltages to levels below the bearing lubricant's electric field intensity breakdown level and offers one solution to accelerated bearing wear caused by fluting induced by pulse width modulated (PWM) inverters. The paper begins by reviewing shaft voltages and the resulting bearing currents when operated on PWM voltage source inverters. An example of bearing fluting is shown and system models are presented and discussed. The construction details and test results for several ESIMs are presented. Experimental results show the ESIM solves the electrostatically induced rotor shaft voltage and bearing problem without degrading the electromagnetic performance of the motor.