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Answer Posted / bhanu gupta
Fan regulator working based on the principle of power control using a Triac.The circuit works by varying the firing angle of the Triac . Resistors and capacitor are associated with this. The firing angle can be varied by varying the value of any of these components. Here register is selected as the variable element . By varying the value of register the firing angle of Triac changes (in simple words, how much time should Triac conduct) changes. This directly varies the load power, since load is driven by Triac. The firing pulses are given to the gate of Triac using Diac.
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