Transformer and input signal frequency

[aasif]

Can any transformer designed for 50hz input signal freqency be used for 300hz input signal frequency? Is the change in input signal freqency effects the transformer? How can we relate the transformer with its frequency?

 

[IanP]

Most of mains transformers will operate as high as 400Hz.
"If the frequency applied to a transformer is increased, the inductive reactance of the windings is increased, causing a greater ac voltage drop across the windings and a lesser voltage drop across the load. However, an increase in the frequency applied to a transformer should not damage it. But, if the frequency applied to the transformer is decreased, the reactance of the windings is decreased and the current through the transformer winding is increased. If the decrease in frequency is enough, the resulting increase in current will damage the transformer. For this reason a transformer may be used at frequencies above its normal operating frequency, but not below that frequency"

 

[nicleo]

When the frequency increases, the eddy current loss increases too.

 

[cesare]

If you run a 50 hz transformer at higher frequency you will get more loss.

At every cycle some energy is stored in the "Iron" and dissipated. If there are more cycles in the time unit more power is wasted as heat.

At higher frequencies the transformer core is realized with ferrites to minimize loss.

 

[DrDolittle]

Your question has lot to convey.just by increasing frequency eddy current loss,magnetising current leading to it's own effect doen not alone should be taken into account.This question is dealing with HIGH VOLTAGE ENGINEERING.



This book is putatively the best for this topic.

Regards
drdolittle

 

[epp]

It is much better to design a new transformer for desired working frequency. It doesn't pay if you use a 50 Hz one for greater frequencies. A 400 Hz one is usually used in navy and aircrafts.

 

[barrybear]

Many of the comments here are true. If you are intent on using a diferent frequency than the mains you must design a transformer for that purpose, our buy one. If you where to use a mains transformer at a higher frequency then here are a few problems you will have to deal with .

1 Overheating as the eddy currents will be more prevolent.
2 Less stability under load conditions.
3 Breakdown of the windings due to vibration.
4 Noise due to coil lamination stability.

Barrybear