频率调制对准谐振DC-DC变换器传导EMI的抑制

IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting Pub Date : 1996-10-06 DOI:10.1109/IAS.1996.560219

D. Jun-hong, M. Vilathgamuwa, T. K. Jet

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引用次数: 0

摘要

本文描述了准谐振DC-DC功率变换器(QRC)中传导电磁干扰的产生。提出了一种基于调频的电磁干扰抑制技术，并进行了实验验证。为了量化在一定频率范围内共模和差模电磁干扰的量，在频域对开关电压和输入电流的谐波谱进行了建模。由于开关频率调制，开关电压和输入电流的谐波谱明显降低。

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Mitigation of conducted EMI in quasi-resonant DC-DC converters by frequency modulation

This paper describes the generation of conducted electromagnetic interference (EMI) in quasi-resonant DC-DC power converters (QRC). An EMI mitigation technique using frequency modulation is proposed along with experimental verification. The switching voltage and input current harmonic spectra are modelled in the frequency domain in order to quantify the amount of common mode and differential mode EMI at certain range of frequencies. The switching voltage and input current harmonic spectra are shown to be significantly depressed as a result of switching frequency modulation.

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IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting

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