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Re: electronic PWM variac



Original poster: Brady Hauth <bhauth@xxxxxxxxx>

Right. I was coming up with a way to use one IGBT as both a SSTC core
and a PWM power control with soft switching only. I drew up some
schematics; I may post them here once they're on my computer and see
if anybody will help me with the values.

> If you think about it. The series element must chop up the current
> symmetrical so it has no DC component. Then it can be applied to an
> inductor.
>.......
> If we assume the H bridge is operating at 60kHz its inductor load only
> requires 1/1000 (first guess) of the inductance that would be required
> to be put in series with the load to control it at 60Hz.