An EMI-less full-bridge inverter for high speed SiC switching devices

Jun Sakata, Masao Taguchi, Shoichi Sasaki, Tadahiro Kuroda, Keiji Toda

    研究成果: Conference contribution

    6 被引用数 (Scopus)

    抄録

    To improve the efficiency of inverters used in hybrid cars and electric vehicles (EVs), SiC-MOSFET transistors are used to minimize the switching losses by high-speed switching. However, as the speed increases, surges and ringing occur in the output voltage, and these can cause electromagnetic interference (EMI). In this paper, we study how this issue can be addressed by using a full bridge inverter to suppress common-mode voltages and cancel ringings currents with opposite phase that are generated when driving at high speed. In most cases, one should assume that transistors that are driven simultaneously have slightly different I-V characteristics. Due to this variation, the ringing cannot be completely canceled, resulting in a common-mode voltage. Although this is liable to cause EMI, we also found that if the two transistors are operated close to the point where the maximum switching current occurs, the common-mode voltage fluctuation can be sufficiently suppressed at any current. We analyzed these characteristics in a simulation using a SiC-MOSFET transistor model, and experimentally verified its behavior in a prototype inverter.

    本文言語English
    ホスト出版物のタイトルAPEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
    出版社Institute of Electrical and Electronics Engineers Inc.
    ページ2570-2576
    ページ数7
    ISBN(電子版)9781538611807
    DOI
    出版ステータスPublished - 2018 4月 18
    イベント33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States
    継続期間: 2018 3月 42018 3月 8

    出版物シリーズ

    名前Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC
    2018-March

    Other

    Other33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
    国/地域United States
    CitySan Antonio
    Period18/3/418/3/8

    ASJC Scopus subject areas

    • 電子工学および電気工学

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