SOLENOID-OPERATED VALVE-DRIVING CIRCUIT AND SOLENOID-OPERATED VALVE-DRIVING METHOD

摘要

When the power supply voltage is applied to the switch control unit, control signals are supplied from the control unit to switch the transistor. The transistor is placed in a breeding ground for a time corresponding to the pulse width of the control signal. Supply voltage is applied to the first voltage to the solenoid coil. Chumyeon the other hand, stops the supply of the control signal for the transistor, the transistor is placed in the off state. It generates a low voltage AC voltage than the power supply voltage generating section. Transistor applies a DC voltage as the second voltage to the solenoid coil. ; Solenoid coils, a counter electromotive force, the pulse signal, the diode