Re: [CAD_CAM_EDM_DRO] Re: VFD for series 1 bridgeport

On Sun Dec 23 21:14:00 2001, Raymond Heckert, <jnr@...> wrote:

>Does anybody have any plans to make a high-power 3-phase inverter? I'm
>thinking about charging a couple of BIG juicy capacitors through a
>full-wave bridge, and use a sinewave synthesizer (3 of them timed 16666
>microseconda apart) to feed a husky set of TRIAC's. I want about 15KVA at
>230 VAC 3-phase. Any help would be appreciated.
>
>Best Wishes for safe & Happy Holidays!
>
>RayHex at jnr@...

Well, not precisely, and I'm not sure how much help this might be, but I have a
cookbook circuit that will take a 6 F clock and give you all 6 phases, (3 phases
and their complements). It's square wave though, not sine. For the high power
end the best I can come up with at the moment would be a MOSFET that'll do
1.2KV at 3 Amps 150Watts with a 4 Ohm on resistance. I suppose one could use a
bunch of them to feed caps that then feed into a string of caps, but what kind
of motor are you using that needs 15,000 Volts?


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