| 摘要 |
A power conversion device (10) of the present invention comprises: a cascaded three-level inverter group in which 2n three-level inverters (10a, 10b) are connected in series; and at least one switching circuit (11) for selecting the outputs of the two three-level inverters in the cascaded three-level inverter group. 2n-1 switching circuits (11) are connected so as to make it possible to select either one of the outputs of adjacent two three-level inverters (10a, 10b) in the cascaded three-level inverter group. In the case of two or more switching circuits, next stage switching circuits are sequentially connected so as to make it possible to select either one of the outputs of two switching circuits connected at the previous stage, thereby obtaining one output. |
