| 摘要 |
PURPOSE:To enable response at high speed by mounting a transistor for absorbing fly-back currents, a resistor for absorbing surge currents and a Zener diode for controlling constant voltage. CONSTITUTION:A solenoid 3 is driven by a driving circuit A consisting of transistors 5, 6, etc. Fly-back currents IF generated in the solenoid 3 are consumed by a resistor 13, etc. A Zener diode 11 controlling constant voltage by ON-OFF control of an N-P-N transistor 12 for absorbing fly-back currents IF and the resistor 13 for absorbing surge currents, etc. are fitted at the time. Accordingly, fly-back currents IF flow by the OFF of the transistor 6, the N-P-N transistor 12 is turned ON so that the fly-back currents IF are constant-voltage controlled by the Zener diode 11 and a resistor 10, and fly-back currents IF are consumed while being returned to the power supply side.
|
