| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power converter which can minimize drop in voltage utilization factor when the output of a failed converter out of multiple converters connected in multi-stage is short-circuited. <P>SOLUTION: The power converter comprises: a three-phase power conversion circuit 10 having three phase circuits each consisting of a multi-stage connection of voltage type converters for converting the output from an energy storage element into single-phase AC power; a voltage setting circuit 20 which sets the output voltages of the three-phase power conversion circuit 10, respectively; and a control circuit 30 which controls the voltage setting circuit 20 so that the output voltages of the three-phase power conversion circuit 10 are equalized by superimposing a fixed voltage corresponding to the number of voltage type converters having short-circuited output terminals on one output voltage having a magnitude different from other two output voltages of the three-phase power conversion circuit 10 when the output terminal of any voltage type converter is short-circuited. <P>COPYRIGHT: (C)2012,JPO&INPIT |
