PROBLEM TO BE SOLVED: To provide a technology capable of suppressing heat generation, in a voltage converter comprising an RC-IGBT.SOLUTION: A voltage converter 12 comprises: two RC-IGBTs connected in series to each other; a reactor 7 whose one end is connected with a midpoint of the series connection of the two RC-IGBTs, and whose the other end is connected with a high-potential end at a battery 81 side; and a controller 10 that switches conduction and non-conduction of the respective IGBTs of each of the two RC-IGBTs. The controller, in a case where a restriction value of a regenerative electric power sent from an inverter is set to a first restriction value in a step-down operation, switches conduction and non-conduction of the IGBT at a first frequency, and in a case where an absolute value of the restriction value of the regenerative electric power sent from the inverter is set to a second restriction value larger than an absolute value of the first restriction value in the step-down operation, switches conduction and non-conduction of the IGBT at a second frequency lower than the first frequency.SELECTED DRAWING: Figure 1

    【課題】RC−IGBTを備える電圧コンバータにおいて、発熱を抑える技術を提供する。【解決手段】電圧コンバータ12は、互いに直列に接続されている2個のRC−IGBTと、2個のRC−IGBTの直列接続の中点に一端が接続されており、他端がバッテリ81側の高電位端に接続されているリアクトル7と、2個のRC−IGBTのそれぞれのIGBTの導通と非導通とを切り替えるコントローラ10と、を備える。コントローラは、降圧動作において、インバータから送られる回生電力の制限値が第1制限値に設定されている場合に、IGBTの導通と非導通とを第1周波数で切り替え、降圧動作において、インバータから送られる回生電力の制限値の絶対値が第1制限値の絶対値よりも大きい第2制限値に設定されている場合に、IGBTの導通と非導通とを前記第1周波数よりも小さい第2周波数で切り替える。【選択図】図1


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    Title :

    VOLTAGE CONVERTER


    Additional title:

    電圧コンバータ


    Contributors:
    GOTO KENJI (author)

    Publication date :

    2017-07-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen




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