ダイポーラ変調における3レベルインバータの出力電圧高調波解析 Analysis of Output Voltage of Three-level Inverter Using Dipola Modulation

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Recently, a neutral point-clamped type inverter (three-level inverter) with large capacity has come to be used in a train, etc. for driving A. C. motor. The three-level inverter has an advantage of being low in harmonics unlike conventional two-level inverter. Moreover, if DC-voltage is at same voltage, a transistor or an IGBT whose switching frequency is high can be used as a substitute for high-voltage GTO thyristor, because the number of switching elements in one arm is double.<br>However, the three-level inverter has a drawback in that the output voltage is not controllable smoothly in the case of output voltage being low. It is because the switching element needs a minimum on-off time; this is especially remarkable with the GTO thyristor whose minimum on-off time is long. In order to avoid operation with this drawback, the three-level inverter frequently adopts a dipola modulation. The dipola modulation adds a bias component to the control signal of output voltage lest the control signal should become low-level, and it generates simultaneously a pulse voltage to cancel the bias component.<br>In this paper, first, the output voltage of a three-level inverter with single phase using dipola modulation is analyzed, then its characteristics of harmonics are made clear. Second, in the case of a three-level inverter with three phases, zero-phase sequence component of harmonics are described. Third, characteristics of harmonics are analyzed in the case of three-level inverter being multiply. Lastly, what are described above are verified by simulation.

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  • 電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society  

    電気学会論文誌. D, 産業応用部門誌 = The transactions of the Institute of Electrical Engineers of Japan. D, A publication of Industry Applications Society 117(5), 637-644, 1997-05 

    The Institute of Electrical Engineers of Japan

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各種コード

  • NII論文ID(NAID)
    10002724538
  • NII書誌ID(NCID)
    AN10012320
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09136339
  • NDL 記事登録ID
    4205173
  • NDL 雑誌分類
    ZN31(科学技術--電気工学・電気機械工業)
  • NDL 請求記号
    Z16-1608
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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