Re: RE: [TCML] DRSSTC weird waveform behavior

[Michael Twieg <mdt24@xxxxxxxx>]

Out of curiosity Steve, why are you still sticking with single supply op
amps and comparators?  I would be really worried about errors in the DC
biasing causing weird stuff on the zero crossing detection.  Mainly, if
there's any difference in the DC biases established by R3/R4 and R5/R6, the
duty cycle of your comparator output wouldn't be 50% and you'd end up
getting different lead/lag on falling and rising current edges.

-Mike

After seeing Finn's "Prediktor" controller use the lead compensator so
> nicely, i developed my own, though have yet to publish it in any formal
> way:
>
> http://www.stevehv.4hv.org/leadcomp/UD2_1revB/
>
> And now the switch timing can be controlled much better, allowing the IGBT
> turn on to happen really at zero current, which keeps the wheeling diode
> recovery from causing big voltage transients.
>
> Steve
>
>
>
>
> > >
> > > > Fra: Justin B <boshjack@xxxxxxxxxxx>
> > > > Til: TCML <tesla@xxxxxxxxxx>
> > > > Dato: Lør, 02. jul 2011 22:49
> > > > Emne: RE: [TCML] DRSSTC weird waveform behavior
> > > >
> > > >
> > > > Just giving an update to progress.
> > > >
> > > > currently, I have an inductor and resistor (1ohm - 100K) in parallel
> > > > with my CT. Turning the potentiometer, does nothing at all. However,
> > > > the inductor has helped. If any one can give feedback as to what im
> > > > doing wrong with this POT, please let me know. because it does
> > > > NOTHING. The pot is in working condition.
> >
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