Simple Fan Regulator Using Triac
Introduction
In this project, we have designed a Simple Fan Regulator Circuit, which can be used to regulate the speed of a fan. This simple fan regulator circuit is implemented using very simple components.
Have you ever come across using a conventional fan voltage regulator to control the speed? Such type of regulator is called as Resistance Regulator, which works on the principle of a rheostat or a resistance potential divider arrangement.
As the steps (of the knob on a regulator box) are decreasing, this means that you are actually increasing the resistance of the circuit and hence the lower power is applied to the fan so that it becomes slower.
Obviously the power consumption by the fan will be less at lower speeds by this arrangement, but this is not an energy saving method. The voltage drop across the resistance is converted into heat losses (I2R), so the energy is dissipated in the form of heat.
This wastage of energy is more at high resistance or lower speed condition. Therefore, conventional fan voltage regulators have more energy losses.
Have you ever come across using a conventional fan voltage regulator to control the speed? Such type of regulator is called as Resistance Regulator, which works on the principle of a rheostat or a resistance potential divider arrangement.
As the steps (of the knob on a regulator box) are decreasing, this means that you are actually increasing the resistance of the circuit and hence the lower power is applied to the fan so that it becomes slower.
Obviously the power consumption by the fan will be less at lower speeds by this arrangement, but this is not an energy saving method. The voltage drop across the resistance is converted into heat losses (I2R), so the energy is dissipated in the form of heat.
This wastage of energy is more at high resistance or lower speed condition. Therefore, conventional fan voltage regulators have more energy losses.
Due to the advancement in power electronic technology, the alternative design of fan regulator (voltage regulator) can be easily implemented to reduce the energy losses that are caused by conventional voltage regulators.
This type of voltage regulator is an energy saving device which uses TRIAC, DIAC and potentiometric resistance. This method provides the step less control of the fan speed by deriving the required amount of power from the main supply at a given instant.
This type of voltage regulator is an energy saving device which uses TRIAC, DIAC and potentiometric resistance. This method provides the step less control of the fan speed by deriving the required amount of power from the main supply at a given instant.
Circuit diagram
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| Simple fan regulator using triac |
Components required
• TRIAC – BT136 – 1no
• DIAC– DB3 – 1no
• Resistor – 100k – 1no
• Variable resistor – 1M ohm– 1no
• Capacitor – 0.22uf – 1no
• Fan – 230v,60w – 1no
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