You might have noticed that the ceiling fan makes noise when the power supply is supplied by an Inverter compared to the fan running when the power supply is provided by the mains. That’s an interesting question one may have in their mind. The reason why fans make noise on inverter is the harmonics present in the power supply provided by the inverter.
The ceiling fan is designed to run on a sinusoidal AC wave supply. The power supply from the electric utility is sinusoidal in nature. Hence the ceiling fan does not make noise. The power supply from the inverter is not pure sinusoidal in nature. The inverter can’t synthesize pure sinusoidal AC from DC. The DC supply is provided by the batteries.
The conversion of DC to AC is not perfect sinusoidal in the inverter. This limitation causes harmonics in the power supply. When this non-sinusoidal AC supply feed to the ceiling fan, it makes noise. That all of you have noticed in your room.
How do I eliminate the buzzing noise in a ceiling fan when it runs on inverter?
Well, buzzing noise in a ceiling fan is common. It does not cause any problem to any individual. But if you are uncomfortable listening to that buzzing noise, you can try to replace your inverter with a better inverter that provides better quality near sinusoidal AC supply. The ceiling fan noise will be lesser but can’t be avoided.
very informative