| 摘要 |
PURPOSE:To perform a function of limiting a rush current with the minimum number of parts by providing a Zener diode which limits the rush current flowed to the coil of a DC motor when the motor is energized by a power source. CONSTITUTION:A rush current limiter 8 which clamps the base voltages of transistors Q1-Q4 which construct a voltage regulator 5 is provided. The base voltages of transistors Q5-Q8 of a DC motor current supply 6 are clamped to the prescribed potential by a Zener diode V'z of the limiter 8, and the current value decided by the potential difference of the emitter circuits of the transistors Q5-Q8 and the resistance value of a resistor R0 is suppressed to the prescribed value or lower. |
