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    • 2. 发明公开
    • 전력 변환 장치 및 전력 변환 방법
    • 电力转换装置和功率转换方法
    • KR1020080001642A
    • 2008-01-03
    • KR1020070063724
    • 2007-06-27
    • 가부시키가이샤 히타치세이사쿠쇼
    • 아끼따요시또시시교우마사까네나가따히로시
    • H02M7/48H02M7/12
    • H02M5/4585H02M7/487H02M7/493H02M2001/0009H02M2001/008Y02B70/145
    • A power conversion device and a power conversion method are provided to prevent an excessive current from flowing through a resonance suppressing resistor by preventing a variation of a DC neutral point voltage. A power conversion device includes a converter(2), a low voltage conductor, a high voltage conductor, a middle voltage conductor, and an inverter(31). The converter converts an AC voltage to a high voltage or a middle voltage. A low voltage is applied to the low voltage conductor. The high voltage is applied to the high voltage conductor. The middle voltage is applied to the middle voltage conductor. The inverter converts the voltage from the conductors to the AC voltage. A first controller(5) controls the converter, so that the voltage of the middle voltage conductor is maintained at a constant value. A second controller(6) controls the inverter, so that the voltage of the middle voltage conductor is maintained at a constant value.
    • 提供电力转换装置和电力转换方法,以通过防止DC中性点电压的变化来防止过大的电流流过谐振抑制电阻器。 电力转换装置包括转换器(2),低压导体,高压导体,中间电压导体和逆变器(31)。 该转换器将交流电压转换成高电压或中间电压。 低电压被施加到低电压导体。 高压被施加到高压导体。 中间电压施加到中间电压导体。 逆变器将电压从导体转换为交流电压。 第一控制器(5)控制转换器,使得中间电压导体的电压保持在恒定值。 第二控制器(6)控制逆变器,使得中间电压导体的电压保持在恒定值。