PWM驱动感应电机轴电压轴承电流

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摘要文中建立了PWM驱动感应电机系统的集总参数共模等效电路模型,并给出了等效电路关键参数的计算公式。以3kW变频电机为研究对象,通过仿真和实验验证了PWM驱动感应电机的共模等效电路和关键参数计算值的正确性。分析了轴电压、轴承电流的产生机理与共模电压的关系,同时研究了载波频率和电机运行频率对PWM驱动感应电机的共模电压、轴电压、轴承电流的影响。为研究轴承电流的抑制措施,提高PWM驱动感应电机轴承运行寿命提供理论依据。

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	白保东
	刘威峰
	王禹
	张剑

关键词 ：共模等效电路, 轴承电流, 轴电压, 共模电压

Abstract：In this paper, a lumped common mode equivalent circuit model of a variable frequency motor driven by PWM inverter is proposed and the formulas of the key parameters in the equivalent circuit are presented. By researching a 3kW variable frequency motor, the simulation results and the experiment results provide the feasibility of the equivalent circuit and the parameters of the inverter fed induction motor. Base on the relationship between the common mode voltage and the generation mechanism of shaft voltage and bearing current, the impact of the carrier frequency and the motor running frequency to common mode voltage, shaft voltages and bearing currents is studied, which provides a theoretical basis for further studying of the suppression measures of bearing currents and increasing the life of a the inverter fed induction motor.

Key words： Common mode equivalent circuit bearing current shaft voltage common mode voltage

收稿日期: 2013-10-11 出版日期: 2014-05-22

PACS:

TM346+.2

基金资助:国家自然科学基金（51277122）, 教育部创新团队（IRT1072）和教育部博士点基金（20122102130001）资助项目

作者简介: 白保东男 1955年生, 教授, 博士生导师, 主要研究方向为特种电机及其控制和大型电力变压器直流偏磁问题。刘威峰男 1989年生, 硕士研究生, 主要研究方向为特种电机及其控制系统。

引用本文:

白保东, 刘威峰, 王禹, 张剑. PWM驱动感应电机轴电压轴承电流[J]. 电工技术学报, 2013, 28(2增): 434-440. Bai Baodong, Liu Weifeng, Wang Yu, Zhang Jian. Research on Shaft Voltage and Bearing Current of Induction Motor Driven By PWM Inverter. Transactions of China Electrotechnical Society, 2013, 28(2增): 434-440.

链接本文:

http://dgjsxb.ces-transaction.com/CN/Y2013/V28/I2增/434

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