| 摘要 |
Provided are: a smoothing capacitor connected in parallel to the DC power source; a bridge circuit including switching elements for converting DC power to AC power, flywheel diodes connected in reversely parallel, and flywheel-and-separation diodes connected in series to the flywheel diodes and serving concurrently as flywheel and separation diodes; an interconnection reactor on an output side, provided on AC output lines connecting the bridge circuit and an AC power source; and a separation circuit for separating the smoothing capacitor and the interconnection reactor from each other during a flywheel period of the flywheel diodes. The separation circuit includes separation switching elements and the flywheel-and-separation diodes. The separation switching elements are respectively connected between the two AC output lines and two series connection points between the flywheel diodes and the flywheel-and-separation diodes, so as to short-circuit the AC output lines. |
