| 摘要 |
A motor control devivce is equipped with: a converter circuit unit (11); a DC circuit unit (12); an inverter circuit unit (13); a bus line voltage detection unit (14); a frequency command generation unit (16) that outputs a frequency command (f1); a voltage control unit (15) that outputs a frequency correction value (Δf) on the basis of a bus line voltage detection signal Vdc; a voltage command generation unit (17) that outputs a voltage command (V1) from the frequency command, or from a corrected frequency command (f2) obtained by correcting the frequency command (f1) with the frequency correction value (Δf); and an inverter driving unit (20) that, on the basis of a voltage command (V2), outputs an output voltage command which is a voltage value necessary for driving a motor (3). When the frequency of the AC power output to the motor (3) is lowered and the speed of the motor (3) is reduced, the inverter circuit unit (13) outputs to the motor (3), in accordance with the output voltage command, AC power with a frequency corresponding to the frequency command (f1) or the corrected frequency command (f2). |
