Re: [TCML] Re:Interrupter Question

[Steve Ward <steve.ward@xxxxxxxxx>]

Sounds like your tesla coil is not designed properly.  Can you supply some
specs on the primary/secondar Ls and Cs?

Steve

On Tue, Sep 1, 2009 at 12:21 PM, Brian <brianv@xxxxxxxx> wrote:

> Steve,
>
>
>
> The diode is rated 600V @ 20 amps, I have good rail voltages and both
> diodes
> are heatsinked. Yes it is switching ok on the gate drives why it is having
> fits I am just not sure, I originally thought I had one of the doubler caps
> failing but after replacing them with different caps there was no change. I
> am using 3500uF 450V caps in the doubler circuit. But now is as good a time
> as any to give those CM300 blocks a try and see how they perform they are
> rated at 70 KHz and as compared to 20KHz on the ones I am using my Fres is
> around 75KHz.  It just has me a little perplexed as all the signals look
> really good and yet the silly thing just does not put out a spark longer
> than 1 to 2 feet in length.  I tried changing the coupling and it seems I
> have it about where it should be any change and it seems to deteriorate it
> more. I did change tap positions and it seems to be correct as well because
> any change also deteriorates it. So I guess trial and error will figure
> this
> out. I am not sure how well those FGA40N60 IGBT work in this application I
> have only heard of couple of people that have used them and maximum spark
> length seem to be about what I am getting so maybe it is just too much for
> them at the Fres. Not sure. but I will see what the CM300 blocks do.
>
>
>
> --Brian
>
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