| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide inverter current limit control for sustaining power supply to a load, by preventing overcurrent due to the delay in synchronous control, when the voltage phase of each auxiliary power supply differs at the time of starting. <P>SOLUTION: In a parallel system with the outputs of a plurality of auxiliary power supplies each performing phase synchronization control connected, effective component and reactive component of an inverter current are determined by performing coordinate transformation of a detected inverter current. When the effective component and reactive component of the inverter current reach arbitrarily set conditions, an output voltage command value containing phase synchronization control is increased/decreased, depending on that value, thus limiting an output control command while sustaining phase synchronization control. <P>COPYRIGHT: (C)2008,JPO&INPIT |
