The circuit diagram provided is a triac - diac electronic fan regulator that would reduce your power usage of electric fans even in slow speeds. A normal resistor-inductor fan regulator heats up to waste eneegy when the fan is running with lowers speeds or it controls motor speed via applying resistance between fan and power supply.
This light dimmer/fan regulator circuit uses the principle of power control using a Tric. The triac turns On and Off varying the firing angle of the Triac. This can be done by a diac oscillator circuit. The diac oscillator consists of D-32 diac, R1, RV1, R2 resistors, a 0.1uF 400V capacitor. The time period of this diac oscillator can be controlled by adjusting RV1. By doing this we can vary the firing angle of the triac thus the speed of the fan motor.
Note
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| Circuit Diagram of Electronic Fan Regulator: Click to enlarge |
This light dimmer/fan regulator circuit uses the principle of power control using a Tric. The triac turns On and Off varying the firing angle of the Triac. This can be done by a diac oscillator circuit. The diac oscillator consists of D-32 diac, R1, RV1, R2 resistors, a 0.1uF 400V capacitor. The time period of this diac oscillator can be controlled by adjusting RV1. By doing this we can vary the firing angle of the triac thus the speed of the fan motor.
Note
- Assemble the circuit on a general purpose PCB.
- Use potentiometers with plastic shafts to avoid electric shock.
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