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Re: OLTC Questions



Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Details on this are at:

http://hot-streamer-dot-com/temp/OLTC09-20-01.gif

http://hot-streamer-dot-com/temp/OLTCigbtC-8-12-02.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-12-03.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-12-04.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-12-05.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-12-06.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-12-07.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-12-08.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-13-01.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-13-02.jpg
http://hot-streamer-dot-com/temp/OLTCigbtC-8-13-03.jpg

Cheers,

         Terry




At 11:15 PM 1/19/2003 -0500, you wrote:
> >
> > 1. How do you make sure your IGBT switch turns off at a primary current
> > zero? I imagine that if you turned it off when the primary current was
> > high, it would blow up. Do you have some kind of current sense circuit or
> > are you just waiting until the ringdown is definitely over?
> >
>
>Terry uses a current sensing circuit to close the IGBTs when capacitor
>charging current is zero, and leave them closed for a set amount of time.
>-------------------------------------------
>Jonathon Reinhart
>hot-streamer-dot-com/jonathon