| 摘要 |
PURPOSE:To eliminate the overshoot of a speed and a vibrating torque by setting a speed amplifier to a proportional operation mode when a step signal is input. CONSTITUTION:When a step signal is input as a speed command value, the output C of a comparator 13 becomes H level. An analog switch 24 is closed, an integrating capacitor 23 is shortcircuited, and a speed amplifier 1 becomes a proportional operation mode. When a motor speed rises to approach a command value, the output C of the comparator 13 becomes L level, the switch 24 is opened, and the amplifier 1 becomes a proportional integrating mode. Thus, the detrimental overcharge of the condenser 23 can be effectively suppressed. |
