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Re: [TCML] SSTC help

Show me the sparks!

H

-----Original Message-----
>From: DC Cox <resonance@xxxxxxxxxxxx>
>Sent: Oct 13, 2009 4:59 PM
>To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
>Subject: Re: [TCML] SSTC help
>
>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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>>
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