OUTPUT VOLTAGE DETECTION ERROR CORRECTION METHOD FOR INVERTER AND ERROR CORRECTION CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide an output voltage detection error correction method for inverter, and an error correction circuit, which detects output voltage with high precision.;SOLUTION: Prior to operation of an inverter 1, a control circuit 3 outputs (0, 0, 0) vector command to turn ON main circuit elements 12, 14, and 16. A correction amount calculation part 23 detects the signal from an output voltage sensor 21 at that time, and stores it in a first memory 231 in the correction amount calculation part 23 as an offset voltage value. Then, the control circuit 3 outputs (1, 1, 1) command to turn ON main circuit elements 11, 13, and 15. The correction amount calculation part 23 detects the signal from the output voltage sensor 21 at that time, and calculates a gain correction value based on the signal and the offset voltage value in the first memory 231.;COPYRIGHT: (C)2009,JPO&INPIT