| 逆变器驱动电动机系统中轴承电流产生的机理研究 |
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| 引用本文： | 幸善成,吴正国. 逆变器驱动电动机系统中轴承电流产生的机理研究[J]. 电气应用, 2005, 24(11): 66-68 |
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| 作者姓名： | 幸善成 吴正国 |
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| 作者单位： | 海军工程大学电气工程系,430033;海军工程大学电气工程系,430033 |
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| 摘 要： | 分析了三相逆变器共模电压及感应电动机内部的寄生耦合效应,基于共模电压和共模耦合效应的概念,解释了PWM逆变器产生轴承电流的机理。
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| 关 键 词： | 寄生耦合效应 轴承电流 共模电压 |
| 修稿时间： | 2005-03-03 |
Generation Mechanism of Bearing Currents in PWM Drive System |
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| Xing Shancheng. Generation Mechanism of Bearing Currents in PWM Drive System[J]. Electrotechnical Application, 2005, 24(11): 66-68 |
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| Authors: | Xing Shancheng |
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| Affiliation: | Navy University of Engineering |
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| Abstract: | Why a PWM inverter can cause a motor bearing current is explained.It is based on the conception of common mode voltage in all power electronic converters and the recognition of parasitic capacitive coupling in drive systems.The conception of common mode voltage and the principle of its generation are explained.The common mode voltage of a three phase inverter is presented.The parasitic capacitive couplings of an induction motor are discussed.Common mode voltages together with parasitic coupling effects are combined to give a theoretical prediction of possible currents into motor bearings. |
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| Keywords: | parasitic coupling effect bearing current common mode voltage |
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