Hi All,
I've got a question regarding the physical size of transformers.
I have a transformer configured as an oscillator that is driving a load that is mostly capacitive but has some resistance. The max output voltage is 100V AC, and the max current is 0.7A AC, at 300Hz. So the VA value is 70 VA. The real power delivered is 25W.
I need this transformer to be as small as possible, so I'm wondering what the main factor is in determining its physical size. Is it resistive losses in the windings heating up the transformer which it needs to dissipate to remain cool enough to run, or is it core size needed to store the energy per cycle, or core losses heating it up?
I am actually thermally bolting the whole thing to a very large heatsink which is fan cooled, so this would increase the heat the tranformer could generate while still maintaining a working temperature. In that case, is it simply down to the core size needed to store the energy transferred per cycle which will determine its size?
Thanks!
Mark.