| 摘要 |
PROBLEM TO BE SOLVED: To improve the efficiency of a conversion device with a low distortion in an AC waveform.SOLUTION: A conversion device for converting DC power supplied from a DC power supply into AC power to feed the DC power to a load, includes: a filter circuit 21 connected to the load and including an AC reactor 22 and a first capacitor 23; a DC/AC inverter 11 connected to the load through a filter circuit 21; a DC/DC converter 10 disposed between the DC power supply and the DC/AC inverter 11; a second capacitor 19 disposed between the DC/AC inverter 11 and the DC/DC converter 10; and a control unit 12 for setting a current target value of the DC/DC converter 10 in a manner to be synchronized with the current of AC power, on the basis of the voltage of the AC power, a voltage change caused by a current which flows through the AC reactor 22 and an impedance, reactive currents which respectively flow through first capacitor 23 and the second capacitor 19, and the voltage of the DC power. |
