I have a H-Bridge based Inverter that modulates a 350VDC source into 220V RMS @ 50 Hz. Right now I'm working at just 70VDC but my output inductor is getting quite warm. Here is a schematic:
The output inductors, L1 and L2, both get quite warm when the DC source is at 70VDC. I haven't gathered the courage to go higher voltages. The switching frequency for my PWM is 16KHz. I have no load on the inverter. By adding a 1.95 Ohms shunt resistor I was able to measure the RMS (I assume mostly reactive) current, which was approximately 400mA. Note that the output waveform looks extremely good and relatively free of ripple, even under some load.
The particular inductor I'm using is 2320-V-RC. The DC Current rating is 3.8A. I don't have enough experience with filters meant for power to know if I should be using a different type of filter or a different sized inductor.