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H bridge, toolmaker style!

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Daniel Uhrenholt
Fri Feb 09 2007, 10:14PM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Hi all.

It`s been a while since I`ve been here, im still looking for a new job, and I just started getting a driver`s licence amazed

I want to try my bridge on a SSTC sometime tomorrow, and I will post the results here.

The driver I will use is Steve Conner`s DWSSTC PLL, and half wave rectified mains, so the filtercap is replaced with some snubbers.

but is there any driver schematics for a simple ISSTC driver out there? I can`t find any confused

It would be neat to control the breakrate on it....

This SSTC thing is quite new for me, but I have a working one with a H-bridge of IRFP460`s.

Cheers, Daniel



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Daniel Uhrenholt
Mon Feb 12 2007, 08:08PM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
It works amazed

This little coil spits out about 400mm of sparks at 220VAC amazed

The secondary height is just 410mm with toroids, and the resonance frequency is about 203kHz. It draws about 4 Amps from the wall, and have 42A Pk-Pk in the primary coil.

A picture of the setup is here:
Link2

And a little movie with the coil:
Link2

The next thing is to add an interrupter, full wave rectified and smoothed mains.

I still have 12 extra FET`s, and I have not blown a single one yet cheesey
This is my second attemp to make a SSTC, and i still have A LOT to lern...

Cheers, Daniel
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Marko
Mon Feb 12 2007, 08:32PM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
It is beautiful! And performance is actually pretty good considering it's not interrupted.
Such coils are real power suckers!

With interrupted coil you may get something more, maybe then you can use fewer primaryy turns to get more peak power..

What's that small toroid? You bought it ready-made? smile
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Daniel Uhrenholt
Mon Feb 12 2007, 09:03PM
Daniel Uhrenholt Registered Member #125 Joined: Fri Feb 10 2006, 01:52PM
Location: Aalborg, Denmark
Posts: 155
Hi Firkragg

Yes the toroid is ready-made, I bought it from John Freau 2 years ago.

I just tried the coil with full wave rectification with no smoothing, and the current draw rise to 8.5A!! The sparks became more like a flame about 250mm long, really hot and evil!!! And i was able to fry my breakout point amazed

I hope I`ll get the coil interrupted tomorrow.

Daniel
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