| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power converter capable of outputting approximate sine waves reduced in waveform distortion even if a DC voltage drops, relating to a power conversion system in which two or more power converters are connected in parallel with each other. <P>SOLUTION: The system is composed of at least two power converters connected in parallel with each other that comprise a means for controlling an output voltage based on an output voltage command. The system comprises a DC voltage detecting means 4 for detecting DC voltages of power converters 100 and 200, a comparing means 11 which detects the fact that a DC voltage value has dropped to a set voltage or below, and an output voltage reduction commanding means 13 which detects the fact that either of the DC voltages of the power converters connected parallel with each other has dropped to a set voltage or lower, and supplies an output voltage reduction amount to each of power converters. <P>COPYRIGHT: (C)2008,JPO&INPIT |
