| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor power converter capable of suppressing harmonics contained in AC current.SOLUTION: A semiconductor power converter is equipped with a harmonic compensation controller 7 including: a current detector 11 for detecting AC current signals in respective power converters 31, 32... 3N or a voltage detector 12 for detecting AC voltage signals or gate signal detectors 131, 132... 13N for detecting respective gate signals; a harmonic component extractor 8 for extracting harmonic components contained in a detection value of the current detector 11 or the voltage detector 12 or the gate signal detectors 131, 132... 13N; a compensator 9 for acquiring a compensation voltage command value for minimizing the harmonics component extracted by the harmonic component extractor 8; and adders 101, 102... 10N which take a sum obtained by adding the compensation voltage command value obtained with the compensator to the voltage command value from voltage command value generators 41, 42... 4N as voltage command values of gate controllers 51, 52... 5N. |
