A passive EMI filter for preventing high-frequency leakage current from flowing through the grounded inverter heat sink of an adjustable-speed motor drive system
A passive EMI filter for preventing high-frequency leakage current from flowing through the grounded inverter heat sink of an adjustable-speed motor drive system
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DOI：
10.1109/tia.2005.853391
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发表时间：
2004-11
影响因子：
4.4
通讯作者：
Hirofumi Akagi;T. Doumoto
中科院分区：
文献类型：
--
作者：
Hirofumi Akagi;T. Doumoto
研究了电压型脉宽调制(PWM)逆变器在变速电机驱动系统中接地散热器的高频泄漏电流。提出并设计了一种无源电磁干扰(EMI)滤波器，用于200V 3.7kW驱动系统，并进行了测试。该过滤器不需要接触不接地的电机中性点。根据实验波形和理论讨论，推导出了带有EMI滤波器的驱动系统的等效共模电路。实验结果验证了EMI滤波器在消除驱动系统散热片和电机机架泄漏电流方面的可行性和有效性。
This paper focuses on the high-frequency leakage current flowing through the grounded heat sink of a voltage-source pulsewidth-modulation (PWM) inverter in an adjustable-speed motor drive system. A passive electromagnetic interference (EMI) filter is proposed, designed, and tested for a 200-V 3.7-kW drive system. This filter does require access to the ungrounded motor neutral point. An equivalent common-mode circuit for the drive system equipped with the EMI filter is derived from experimental waveforms along with theoretical discussions. Experimental results verify that the EMI filter is viable and effective in eliminating both heat-sink and motor-frame leakage currents from the drive system.