Fan motor driving circuit

  
Fan motor driving circuit Shown as a simple fan motor driving circuit, which is mainly from the power circuit, the motor drive circuit portion constituted. The power supply cir
Fan motor driving circuit - schematic

cuit mainly by the power switch SI, capacitor cJ, resistors Rl, Zener diode vs, rectifier diode VD and filter element capacitor C2 and the like; and a control circuit mainly by the transistor VTI, timing selector switch S2 test machine integration. circuit lC (NE555) and related peripheral element composition. AC 22V voltage through C1 buck, VD rectifier, q filter, vS regulated output DC voltage of about 12 V. When the power is turned on, 1V to charge the capacitor C3, c3 ends when the voltage rises to the set value, VT1 conduction, the integrated circuit IC pin goes low, the pin output high, so rr2 turned on, the motor M is energized to rotate.




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