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Conductive Noise Suppression with Cancelling for Miniaturization of EMI Filters in PFC Converter

Conductive Noise Suppression with Cancelling for Miniaturization of EMI Filters in PFC Converter

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カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門(英文)

発行日: 2021/11/01

タイトル(英語): Conductive Noise Suppression with Cancelling for Miniaturization of EMI Filters in PFC Converter

著者名: Ryuji Yamada (Fuji Electric Co., Ltd.), Ryunosuke Araumi (Fuji Electric Co., Ltd.), Satoru Fujita (Fuji Electric Co., Ltd.), Keiji Wada (Tokyo Metropolitan University)

著者名(英語): Ryuji Yamada (Fuji Electric Co., Ltd.), Ryunosuke Araumi (Fuji Electric Co., Ltd.), Satoru Fujita (Fuji Electric Co., Ltd.), Keiji Wada (Tokyo Metropolitan University)

キーワード: conductive noise,EMI,Noise-cancelling,PFC,spread spectrum

要約(英語): This paper proposes a combination of two methods to reduce the conductive noise in power factor correction (PFC) circuits. The two methods do not involve large additional components.The first method achieves noise cancellation with an additional circuit using general-purpose transistors. It reduces the noise voltage by injecting a current of equal magnitude and opposite polarity to the leakage current generated by the switching device, which is the noise source, according to its operation. This is effective for not only average (AV) values but also quasi-peak (QP) values since the changes in the noise waveform are tracked.The second method applies a control signal with a spread spectrum. The application of the spread spectrum for PFC has conventionally been effective only for AV values. This paper shows the conditions required to be effective for QP values as well.The combination of these methods is confirmed to reduce the conductive noise by about 30dB in the frequency range below 1MHz, which is the dominant factor affecting sizing of EMI filters. This is equal to the attenuation achieved by a single LC filter stage.

本誌: IEEJ Journal of Industry Applications Vol.10 No.6 (2021) Special Issue on “ICEMS 2020-Hamamatsu”

本誌掲載ページ: 700-707 p

原稿種別: 論文/英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/10/6/10_21000945/_article/-char/ja/

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