| 摘要 |
PURPOSE: A circuit for driving fan motor of automobile is provided to prevent flickering of headlamps by delaying driving of one of two condenser fan motors on starting of an air conditioner to prevent sudden descent of voltage of a battery. CONSTITUTION: A circuit includes a first condenser fan relay(31) supplying power of a battery(B+) to a first condenser fan motor(34) to drive; a second condenser fan relay(32) supplying power of the battery to a second condenser fan motor(35) to drive; a full automatic temperature control(FATC:10) supplying power for driving the second condenser fan relay and outputting air conditioner driving signal when an air conditioner switch is turned on; a drier pressure switch(37) turned on and off according to pressure of refrigerant of a drier to supply or intercept power supplied from the FATC to the second condenser fan relay; and an electronic control unit(ECU:20) connecting relay coils(31-1,32-1) of the first condenser fan relay and the second condenser fan relay to grounds to immediately drive the first condenser fan motor when the air conditioner driving signal is input and driving the second condenser fan motor according to condition of the drier pressure switch.
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