400 Hz transformer
400 Hz transformer
(OP)
Can I use a 60 Hz dry type transformer for 400 Hz power? What if I derate the transformers? What would happen?
We are a testing lab that typically sets up equipment for a week and monitors operation continuously.
We are a testing lab that typically sets up equipment for a week and monitors operation continuously.






RE: 400 Hz transformer
Flux will be about 1/7th of nominal flux and since iron losses are proportional to flux squared, they will be quite low - despite the fact that eddy currents increase with flux suared. The reason is that the hysterisis losses will be lower so that the total iron losses go down.
Copper losses can go up if this is a large transformer (skin effect is noticable at 400 Hz and large counductors).
What power levels are we talking about?
Gunnar Englund
www.gke.org
RE: 400 Hz transformer
RE: 400 Hz transformer
Gunnar Englund
www.gke.org
RE: 400 Hz transformer
Steve
RE: 400 Hz transformer
You can use voltages of 6 or 7 times rated voltage without saturation if the insulation will withstand the higher voltage.
However you may not be able to find standard transformers at usable voltages.
A 480:120 volt transformer may be replaced by a 80:20 volt transformer if you can find one.
respectfully
RE: 400 Hz transformer
None of these solutions is ideal, but monitor core temperature (not windings) and switch off if it gets nasty.
Gunnar Englund
www.gke.org