| 摘要 |
PROBLEM TO BE SOLVED: To provide a power conversion apparatus capable of supplying power to a standby unit or to a standby battery while a bidirectional converter is stepped up or stepped down, and capable of efficiently discharging electric charges of a smoothing capacitor. SOLUTION: The power conversion apparatus comprises a battery 2, a main contactor 4 for supplying power/interrupting supply of power of the battery 2, a smoothing capacitor C1, a transformer 8, a first switching element Q1, a first diode D1 connected in reverse parallel to the first switching element Q1, a second switching element Q2, a second diode D2 connected in reverse parallel to the second switching element Q2, a smoothing capacitor C2, a rectifier circuit 11, and a smoothing circuit 12 for smoothing an output of the rectifier circuit 11. It also comprises a first discharge control means which turns OFF the main contactor 4 and also turns the first switching element Q1 ON/OFF at a specified duty ratio so that the electric charge of the smoothing capacitor C1 is discharged and a wanted voltage is output from the smoothing circuit 12. COPYRIGHT: (C)2009,JPO&INPIT
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