zvs driver error

Ambar, Mon Mar 26 2007, 11:07PM

I make the zvs driver, but it did not function, when I bind to PC PSU it disconnect yourself, as if he stows myself in short. I changed the fast diodes of 400V+ for the diode of 1N4148 for 100V, the MOSFETS I am the IRFP250, the capacitor is of 2uF/250V and the inductor is not toroid and has 10-20 turns. Pictures from my zvs to driver…

1174950366 549 FT0 Zvs04

1174950366 549 FT0 Zvs03

1174950366 549 FT0 Zvs02

1174950366 549 FT0 Zvs01
Re: zvs driver error
Marko, Mon Mar 26 2007, 11:17PM

Your diodes are not connected properly, you put them across drain and gate of the same mosfet.

Take another look at schematic.
Re: zvs driver error
..., Mon Mar 26 2007, 11:39PM

I am also a little worried about you inductor, is it on any kind of core? An air cored inductor of that size is much to small... The best thing is to rip the yellow core out of a computer PSU and wind ~40-100 turns of wire in it (or buy a premade one from my sale/trade thread for $10 shipped anywhere in the world.)
Re: zvs driver error
Ambar, Mon Mar 26 2007, 11:48PM

I received the MOSFETS today, I would have some possibility of them already to have come burnt? Although I to find that it is not burnt, because when the tension in the base is on or when the anodes of the fast diodes are only on in the Drain that PC PSU enters in short.
Re: zvs driver error
ragnar, Tue Mar 27 2007, 01:07AM

The black Zener diodes are connected correctly, but you should rearrange those signal diodes:

Try UF4007s instead of 1N4148s, connect the CATHODE (stripe) to the transistor's drain (middle pin) and the ANODE to the OTHER transistor's gate.
Re: zvs driver error
Electroholic, Tue Mar 27 2007, 04:37AM

uf4007 used in this one.

1174970261 191 FT22527 Zvs
Re: zvs driver error
Ambar, Tue Mar 27 2007, 03:56PM

I was irritated for zvs I do not catch and I found that mosfet could be some, in this history I finished burning one of them. Then I will have that to ask for to another one mosfet and already I will include the UF4007. The Anode of the UF4007 must be on in the Gate of first mosfet and the Cathode must be on in the Drain of as mosfet?
Re: zvs driver error
Dr. Shark, Wed Mar 28 2007, 05:06PM

Wow, that's a nice, clean and compact layout you have there, Electroholic.

Ambar, maybe you can ask your question in Spanish, I am sure a bunch of people here would understand you a lot better that way. I kind of have the feeling you do not understand the suggestions people are making.
Re: zvs driver error
Ambar, Fri Apr 13 2007, 12:30AM

zvs it´s running amazed , sparks very nice, running at 34V and 10-8A, picture and movie:
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