Re: three phase coiling

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Greg Leyh <lod-at-pacbell-dot-net> 

It's true that the 6500V-class IGBTs aren't cheap.  But a *triggered* 
sparkgap with the required RMS current capacity, rep rate, and quench time 
is not likely to be a walk-in-the-park engineering effort, either... which 
isn't to say it couldn't be done though.  ^_^


-GL


>Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
>
> > Original poster: Greg Leyh <lod-at-pacbell-dot-net>
> >
> > Solid-state primary switching might be the best way to get the timing
> > resolution you require for accurate 3-phase RF control.  I'll have a
>better
> > idea within a few weeks what degree of control such a 'phasing' knob has
>on
> > the output arcs of a twin coil.  The phasing control for the ALF prototype
> > will have a resolution of about 200nS, on a 16uS period Fo.
> >
> > -GL
> >
>
>But... I haven't seen many (inexpensive) solid state primary switches that
>can take the kilovolts at kiloamps kind of thing that a spark gap does so
>nicely.  However, maybe triggered spark gaps might be the ticket.