POWER CONVERSION DEVICE

To provide a power conversion device capable of suppressing vibration of a load device connected with a motor.SOLUTION: A power conversion device is provided with a control part 40 by which control for periodically varying output torque of a motor of which the load torque periodically varies is performed. The control part 40 performs at least one of first control for generating output torque having a waveform including a reference wave frequency component of a load torque using a frequency according to a fluctuation period of the load torque as a reference wave frequency and at least one of a four-times component and a six-times component of a power supply frequency of an AC power supply and second control for generating output torque having a waveform including at least one of a two-times component and a three-times component of the reference wave frequency of the load torque and a two-times component of the power supply frequency of the AC power supply in order to increase a vibration suppression component in a direct type power conversion device.SELECTED DRAWING: Figure 2 【課題】モータに接続された負荷装置の振動を抑制可能な電力変換装置を提供する。【解決手段】電力変換装置は、周期的に負荷トルクが変動するモータの出力トルクを周期的に変化させる制御が行われる制御部４０を備える。制御部４０は、直接形の電力変換装置で振動抑制成分を増加するために、負荷トルクの変動周期に応じた周波数を基本波周波数とする負荷トルクの基本波周波数成分と交流電源の電源周波数の４倍成分及び６倍成分のうち少なくとも一方とを含む波形を有した出力トルクを生成する第１制御と、負荷トルクの基本波周波数の２倍成分及び３倍成分のうち少なくとも一方と交流電源の電源周波数の２倍成分とを含む波形を有した出力トルクを生成する第２制御と、の少なくとも一方を行う。【選択図】図２