| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the following problem: Using a power supply with a different voltage magnitude, it is necessary to identify which power supply is connected in charging external storage means, and conventionally a method for adding an auxiliary control wire for power type detection to each of power connectors and reading it on the electric power conversion system side, and a method for consuming charges of a DC intermediate circuit with an AC motor winding when stopping the electric power conversion system have been used; however the former causes a cost increase and the latter requires to control an AC motor so that the motor does not rotate and causes technical difficulty, which goes against further high operation efficiency. <P>SOLUTION: In stopping running of a power phase converter, charges stored in a DC intermediate circuit are discharged to an external storage device via a step-up/down DC-DC converter circuit. Thus, even when a different voltage from a power supply during stopping is applied at the next running start, power supply type is completely identified to prevent generation of wasteful discharging. <P>COPYRIGHT: (C)2013,JPO&INPIT |
