| 摘要 |
PROBLEM TO BE SOLVED: To provide a conversion device which achieves high conversion efficiency by reducing a switching loss and is capable of effectively utilizing a plurality of DC power sources.SOLUTION: The conversion device which converts DC power of the plurality of DC power sources into AC power and supplies the AC power to a load comprises: a filter circuit 21 including an AC reactor 22 and a first capacitor 23; a DC/AC inverter 11 which is connected with the load via the filter circuit 21; DC/DC converters 10 and 41 which are provided between each of the plurality of DC power sources and the DC/AC inverter 11; a second capacitor 19 which is provided between the DC/AC inverter 11 and the DC/DC converters 10 and 41; and a control part 12 which sets current target values of the DC/DC converters 10 and 41 synchronously with a current of the AC power on the basis of a voltage of the AC power, a voltage change caused by a current that flows in the AC reactor 22, and impedance, ineffective currents which flow in the first capacitor 23 and the second capacitor 19 and voltage of each of DC power.SELECTED DRAWING: Figure 2 |
