Patent ID: 8188701

Claim:
A power regenerative converter comprising: a smoothing capacitor for storing an induced electromotive force generated by a three-phase induction motor; a regenerative transistor for switching a terminal voltage of the smoothing capacitor to carry out a power regenerating operation over a three-phase AC power supply; a line voltage detecting portion for detecting a line voltage of the three-phase AC power supply; a fundamental waveform generating portion for generating, from a signal output from the line voltage detecting portion, a fundamental waveform defined to be a line voltage waveform of the three-phase AC power supply in which a source voltage distortion component is not mixed; a base driving signal creating portion for creating a base driving signal to be used for an ON/OFF control of the regenerative transistor based on a signal output from the fundamental waveform generating portion; and a base driving signal output portion for outputting the base driving signal.