X-Mailer: Mozilla 4.79 [en] (Win98; U)
Subject: Re: Solid State Tesla Coil Success!
NNTP-Posting-Date: Wed, 25 Dec 2002 08:30:28 GMT
Organization: AT&T Broadband
Date: Wed, 25 Dec 2002 08:30:28 GMT
Mike Poulton wrote:
> Awhile ago I started a thread asking for various bits (and some large
> chunks) of information on solid state Tesla coil design. I was building a
> coil to run from rectified 208V 3-phase power, hoping for somewhere around
> 3-4kW input. Well, it finally works well. I have not run it from 3-phase
> yet, but running from 120V at 12A, I got really big sparks and no smoke
> from the semiconductors. I ran it at reduced power (120V, 6A) for a few
> hours with no problems. The input impedance is rather unusual -- it seems
> to draw almost constant current regardless of voltage, and the current can
> be varied by changing the number of primary turns. I haven't blown any
> mosfets with my present configuration. However, I did burn the secondary
> with a 24" arc down through the center. So, as soon as I wind a new one I
> will try it with a 240V input and see how it does. When I get back to the
> university after winter break I will be able to try the 3-phase input.
> Thanks again to Win and all the others who helped with this project -- I
> couldn't have done it without you guys!
Good for you, Mike. Is your coil running open loop or under closed loop
control with feedback? And how about the drive? What did you end up
with there? -- analog