Martin A Flynn wrote:
>
> AC is easy - Think variable frequency motor drive. Easy contol of V, I,
> and E with ramp up and down.
*** OK, as long as it doesn't have to be sine-wave AC, it's easy. Guess
square waves are
OK... How about the PWM output off a PIC?
- Jerry
>
> On 6/16/2012 12:10 PM, Jerry Kaidor wrote:
> > Regulating AC OTOH is hard. Techniques I can think of off the top of
> > my head include - special transformers with IIRC air gaps that are
> > controlled with DC windings that partially saturate them - transformers
> > with multiple
> > primaries or secondaries chosen by Triacs or SCR's - small motor-controlled
> > variacs - powerful AC amplifiers with gain feedback...
> >
>
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