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Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
You can do a simple test by removing the current transformer and driving the CT pins with a 250KHz sine wave, while the interrupter is installed. If the signal at each IGBT gate is a reasonably nice 0-15V square-wave, then you can assume the signal pathway is intact and you did something silly on the power end of things.
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
teravolt wrote ...
that is ia nice setup, is that little ciol working with your new board?
Yep, the new board adds a few little features such as a MIDI-signal-present indicator lamp and a fuse. It also tightens up the layout of the controller.
teravolt wrote ...
have you thought of selling that coil in your last video as a kit.
This has been in the works for a while; expect to see kits for sale soon, complete with laser-cut acrylic components and (cheap) optional pre-wound secondary. For now, as usual, if you want a board you can PM me. New pics
Registered Member #4362
Joined: Sat Jan 21 2012, 03:44AM
Location: Texas
Posts: 98
Dr. ISOTOP wrote ...
You can do a simple test by removing the current transformer and driving the CT pins with a 250KHz sine wave, while the interrupter is installed. If the signal at each IGBT gate is a reasonably nice 0-15V square-wave, then you can assume the signal pathway is intact and you did something silly on the power end of things.
Ok, with the CT out of the circuit and a 200 khz (my signal generator only goes up to 200khz) signal substituted both my igbt gates are still not square. The signal going into the gate transformer is also not square.
I think im done with this circuit. It looks nice and I beleive you guys did a good job with it but Ive blown way to many parts and money.
As far as the board and traces go they are in poor shape. This pcb was not designed to handle any repairs. Desoldering with the correct tool still pulls traces up.
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
E.TexasTesla wrote ...
Dr. ISOTOP wrote ...
You can do a simple test by removing the current transformer and driving the CT pins with a 250KHz sine wave, while the interrupter is installed. If the signal at each IGBT gate is a reasonably nice 0-15V square-wave, then you can assume the signal pathway is intact and you did something silly on the power end of things.
Ok, with the CT out of the circuit and a 200 khz (my signal generator only goes up to 200khz) signal substituted both my igbt gates are still not square. The signal going into the gate transformer is also not square.
I think im done with this circuit. It looks nice and I beleive you guys did a good job with it but Ive blown way to many parts and money. If someone wants this for parts I will put it on ebay or trade for something.
As far as the board and traces go they are in poor shape. This pcb was not designed to handle any repairs. Desoldering with the correct tool still pulls traces up.
The IGBT's don't particularly enjoy being desoldered. The IC's should be socketed; desoldering a 14-pin package is nearly impossible even with proper tools.
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oneTesla - a small single-board DRSSTC
