变频技术对交流电动机轴电流的影响与预防  

The Influence and Prevention of AC Motor Bearing Current in Variable-Frequency Application

作　　者：郭程[1] 

机构地区：[1]中国铝业公司山东分公司热电厂,山东淄博255061

出　　处：《大电机技术》2008年第3期23-25,30,共4页Large Electric Machine and Hydraulic Turbine

摘　　要：阐述了变频电源中的高频谐波增大了大中型电机的轴电流,分析了高频轴电流的产生机理,提供了轴电流烧损轴承的判断方法。为减少轴电流的危害,提出了转轴绝缘、轴承绝缘和均衡接地电压等防止变频电动机轴电流危害的具体措施。This paper discussed that high-frequence pulses in variable-frequence power increased bearing current of high-power motor, analyzed the appearance of high-frequency bearing current, introduced the method to judge burnt bearing due to bearing current. In order to decrease the harm of bearing current, this paper put forward some measures to prevent the harm such as rotor insulation, bearing insulation and poising earthing-volatge.

关 键 词：变频技术 轴电流 预防 

分 类 号：TM34[电气工程—电机]