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[AVR] AC Dimming of FAN making humming noise

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ajit5wadekar

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Hi Everyone,

I have achieved FAN Dimming using Phase chopping method, here I get smooth dimming on Incandescent Bulbs and I am also able to dim FAN using the same. But during FAN dimming it makes a lot of humming noise due to added harmonics. Can anyone explain this humming in detail and tell how to reduce this noise

Reagrds,
Ajit Wadekar
 

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