transformer heating

i made a transformer of 450 v and 70 A out put for battery plates chgarging...
As this is a continuous load of charging the transformer getting heated , both core and winding..primary and secondary are of good quality copper wire and guage are 10 no and 11 no...Can u pl. advise what to do for less heating...

Well if the transformer is getting too hot you didn't spec it correctly for the load, it's under designed or it wouldn't get too hot. How hard is that to figure out. So you can do the spec all over and get a higher rated transformer or put forced air on it to keep it cool.

So this battery charger, is it buy any chance creating harmonics, i.e., is the load non-liner in that it only conducts on portions of the cycle, like a bridge rectifier? What is the power factor of the load? Harmonics can cause eddy current losses in the transformer as well as additional hysteresis losses in the core. Check that as well.

Good luck.

thnks Mr.albinn,

I have already taken spcs higher side then required..The charger is made for constant current means as the volts of batteries goes higher the current decreases but we need to current constant..so it will save time...

Then you are going to have to get test equipment out and look at the current and the harmonics and do your own analysis, or share with this group. We have nothing to go on because you have shared NO, NO data. Still too hot, then you have simply undersized it for the load, that simple, ot the transformer is defective.

Good luck.

HI made a transformer of 450volts Is this secondary output, primary input Which one? Operating at what frequency? providing 70amps output, no idea of what the voltage is at 70 amps either, and used this for charging battery plates,

What voltage are the batteries? What is the amp hour rating ? What type of batteries ? , where is the circuit diagram? What type of matarial did you conystruct the core from? Eddy currents preventative measue to reduce eddy current? Temparature measurements and if so over what time period? at what current? What gauge copper wire did you How did you calculate this Number in turns in primary? Number of turns in secondary? Harmonic tuning if any?


I MADE A TRANSFORMER hmmmm Indeed! !
Incredible? ABSOLUTLEY INCREDIBLE!!

How can anyone even begin to answer a question like this unless you have all the facts

Well Mrudul..
First question is, did you check the specs for the load you are feeding " second" believe it or not, try to connect a scope on the output of the transformer and load and see if there is any noise between them...

What temperature is the transformer?