Re: [TCML] SSTC help

[DC Cox <resonance@xxxxxxxxxxxx>]

If your igbts are not phased properly one may be slightly turned on while
the other is slightly off.  If you don't phase them properly they will blow
is short order.

Also, check for high frequency ringing which is a killer.  Proper filtering
with inductors or caps can eliminate this problem.

The system of feedback you use to keep the pri circuit in tune with the sec
circuit is also critical.  Solid state components work great but will
absolutely not tolerate much range as will the spark gap type oscillators.

I hope to have a set of boards populated and ready for sale this winter.
Right now they are working great running with Powerex CM300s on our test
coils.

Dr. Resonance




On Mon, Oct 12, 2009 at 9:13 PM, Rob Byron <mustang_5l87@xxxxxxxxxxx> wrote:

> Hello, I have been working on my first solid state coil for a good part of
> a year and after many blown components and hours searching the net, I am
> stumped. The coil I am working on is of Steve Ward's mini sstc. I used eagle
> to etch a board to replace the crappy proto type board. This gave me better
> results ( my UCC's don't fry anymore :) I put an LED on the output of the
> interruper to make sure that works. My gate drive IC's make a high frequency
> buzz. Not sure if I should be able to hear that? But it leads me to believe
> they work. My half bridge is on a variac, rectified and filtered. I get
> 170VDC at full power on the bridge. But I can't get breakout?? I did try
> swapping the primary leads to get 180* out of phase. Here is a link to
> video.     http://www.youtube.com/watch?v=kX7oV9iC0Jo
>
> Thanks in advance for any help.
>
> Rob.
>
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