Voltage stresses on stator windings of induction motors driven by IGBT PWM inverters

38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003. Pub Date : 2003-10-12 DOI:10.1109/IAS.2003.1257537

D. Hwang, Ki-Chang Lee, YongJun Kim, Sungwoo Bae, Dong-Hee Kim, Chae-Gyun Ro

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引用次数: 18

Abstract

In the IGBT PWM inverter, insulation breakdown and irregular voltage distribution on stator winding due to high rate of voltage rise (dv/dt) caused by high-frequency switching and impedance mismatches between inverter and motor have been treated as the main consideration. This paper describes the distribution characteristics of switching the surge voltage in the stator windings of an induction motor driven by IGBT PWM inverter. To analyze the voltage distribution between turns and coils of the stator winding, an equivalent circuit model of the induction motor including feeder cable is proposed and high frequency parameters are computed by finite-element analysis. From the electro-magnetic transient program (EMTP) simulation of the entire system, which consists of induction motor, feeder cable, and PWM inverter, the effects of rising time of the inverter output voltage, cable length, and switching frequency on the voltage distribution are also presented. A 380 V, 50 HP three phase induction motor with taps from the first through fifth turns has been built in order to experimentally measure the turn voltage and it provides informative experimental results.

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IGBT PWM逆变器驱动感应电动机定子绕组的电压应力

在IGBT PWM逆变器中，主要考虑了高频开关引起的高电压上升速率(dv/dt)和逆变器与电机之间的阻抗不匹配导致的定子绕组绝缘击穿和不规则电压分布。本文研究了IGBT型PWM逆变器驱动的异步电动机定子绕组中浪涌电压开关的分布特性。为了分析定子绕组匝间和线圈间的电压分布，建立了含馈线电缆的异步电动机等效电路模型，并通过有限元分析计算了高频参数。通过对由感应电动机、馈线电缆和PWM逆变器组成的整个系统的电磁暂态程序仿真，给出了逆变器输出电压上升时间、电缆长度和开关频率对电压分布的影响。本文建立了一种380 V、50 HP的三相感应电动机，采用第一匝至第五匝抽头进行了匝电压的实验测量，并提供了丰富的实验结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003.

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