| 摘要 |
PURPOSE:To prevent the flickering of lighting equipment having the same power source, by a method wherein the supply of current to a servomotor is interrupted when the voltage drop of the power source is generated upon the sudden acceleration of the servomotor. CONSTITUTION:When a pedal is treaded suddenly to accelerate a servomotor 5 quickly, the voltage of a power source is dropped. The potential of a terminal Y is reduced in accordance with the change of the power source. The fluctuation of the potential of another terminal X is mitigated by the discharge current of a capacitor C and becomes a small change, therefore, the initial potential thereof may be kept substantially. Accordingly, the level of the terminal Z of a comparator 3 becomes H level when the potential of the terminal Y has become lower than the potential of the terminal X whereby a control circuit 4 interrupts current for the servomotor 5. |
