| 摘要 |
PURPOSE:To save the consumption of electric current under a steady state and to suppress a heating-up, by increasing a solenoid electric current only for the time required for a head load. CONSTITUTION:The circuit is provided with a timer 22 to turn on for a certain period of time in comply with a head load signal 11 inputted from the exterior, a 1st transistor 17 for driving a solenoid coil 20 in accordance with the output of the timer 22, and a 2nd transistor 18 for driving the solenoid coil 20 via a resistance based on the head load signal 11. When the head load signal 11 is inputted, the solenoid electric current is then increased so far as the time is required for the head load. Thus, the consumption of electric current can be reduced in the steady condition, reducing the heating-up and magnetic leakage as well.
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