New methods to suppress EMI noises produced in the motor drive system

Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579) Pub Date : 2002-08-07 DOI:10.1109/PCC.2002.998123

N. Mutoh, M. Ogata, K. Gulez, F. Harashima

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引用次数: 3

Abstract

A method is studied which suppresses common mode currents flowing in a motor drive system. The method is based on the analyses of EMI noises at high frequencies. EMI noises are analyzed using the FFT method, and separating the motor drive system into three parts: the source (ACL) side, the power converter side and the load (motor) side. It is found through these analyses that there are four resonance frequency components having a strong influence on common mode currents appearing in the motor drive system. Three components of them are generated in power converters (rectifier and inverter); i.e. the two resonance components are produced by switching operations of power converters, and the third component is produced by DC voltage fluctuations superposing on P (or N)- power transmission lines of the converter (rectifier) and inverter. The fourth one is produced by a micro-surge occurring at the terminals of the motor. A method is proposed that controls these resonance components, separating the motor drive system into the three sides. The effectiveness of the proposed method is verified through simulations and experiments.

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抑制电机驱动系统电磁干扰噪声的新方法

研究了一种抑制电机驱动系统共模电流的方法。该方法基于对高频电磁干扰噪声的分析。利用FFT方法对电机驱动系统的电磁干扰噪声进行分析，将电机驱动系统分为源侧、功率变换器侧和负载侧三部分。通过这些分析发现，在电机驱动系统中有四个共振频率分量对共模电流有很大的影响。它们的三个组成部分在功率变换器(整流器和逆变器)中产生;即两个谐振分量是由功率变流器的开关操作产生的，第三个谐振分量是由叠加在变流器(整流器)和逆变器的P(或N)-输电线路上的直流电压波动产生的。第四个是由发生在电机端子处的微浪涌产生的。提出了一种控制这些共振分量的方法，将电机驱动系统分成三面。通过仿真和实验验证了该方法的有效性。

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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Proceedings of the Power Conversion Conference-Osaka 2002 (Cat. No.02TH8579)

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