| 摘要 |
PURPOSE:To reduce a current command ripple by shortening a sampling period Ts, and inputting a filter circuit command generator. CONSTITUTION:Filter circuits 32a, 32b which have resistors 29a, 29b, a capacitor 30, and an operational amplifier 31 are provided at the outputs of D/A converters 18a, 18b, and the output is current commands i*U, i*. The time constants Tt of the filter circuits 32a, 32b is smaller than the period Ts. Thus, since the current command ripple is reduced, motor noise decreases, and since the gain of a speed control system can be increased, the speed response can be accelerated. |
