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what will happen if we double the input frequency of a
transformer keeping the voltage constant?
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Answer Posted / dinesh b.e
The same current will flow for both 50 and 100Hz frequency.The Only difference is hysteresis losses will be more if 100Hz given as input. .Which only used to test the transformer's for 60second to check insulation withstand capability. .Generally hysteresis losses will be there in transformers which depends upon core quality. .Magnetising and Demagnetizing of core for 100cycles leads to increase in hysteresis loss.That is losses in form of heat .Which gives raise to increase the oil temperature.Due to this effect , chemical reaction Will take place between copper and sulfur content in oil.finally formation of copper sulphate,which acts as a conductor and settled upon windings . circulating current Will be there due to mmf.which leads to heat and damages the windings dielectric strength.
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