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Antonio

Sun Jun 10 2012, 06:14PM

Registered Member #834 Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644

Dri0m wrote ...

That's a good little unit you must have used 260's?

I used IRFP250N. But zener diodes in this ZVS are probably too weak (lol 5W :D), they can't handle voltage peaks and ZVS is now dead :D i will put there some neon glows, it will help :)

Your first construction technique is much better than the (sorry) mess of the second.

Antonio

Sun Jun 10 2012, 06:16PM

Registered Member #834 Joined: Tue Jun 12 2007, 10:57PM
Location: Brazil
Posts: 644

zippotix wrote ...

But does anybody know the answer to my original question :)?

Without a complete schematic there is no way to say anything.

zippotix

Mon Jun 11 2012, 08:24AM

Registered Member #5208 Joined: Thu Jun 07 2012, 06:12PM
Location:
Posts: 86

I can't find any schematic of it. Would a photo of the circuit do?

Dri0m

Mon Jun 11 2012, 12:42PM

Registered Member #4497 Joined: Thu Apr 19 2012, 12:53PM
Location: Behind you
Posts: 62

Antonio wrote ...

Dri0m wrote ...

That's a good little unit you must have used 260's?

I used IRFP250N. But zener diodes in this ZVS are probably too weak (lol 5W :D), they can't handle voltage peaks and ZVS is now dead :D i will put there some neon glows, it will help :)

Your first construction technique is much better than the (sorry) mess of the second.

yep, it is, and ZVS V will look the as ZVS II, because i will make it run for 350VDC from outlet with IGBTs, and i don't need that thick cables for higher voltage, but i need massive heatsinks, just like on ZVS I and II :)

Dri0m

Mon Jun 11 2012, 12:44PM

Registered Member #4497 Joined: Thu Apr 19 2012, 12:53PM
Location: Behind you
Posts: 62

zippotix wrote ...

I can't find any schematic of it. Would a photo of the circuit do?

I recommend to use 15V 5W zeners, 5W 470R resistors, 1W 10k resistors, UF5408 fast diodes, and 5x220n >250V capacitors.

Patrick

Mon Jun 11 2012, 02:02PM

Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639

if you cant find a schematic, you shoud be able to draw a schematic of your own, as built.

Newton Brawn

Tue Jun 12 2012, 03:00AM

Registered Member #3343 Joined: Thu Oct 21 2010, 04:06PM
Location: Toronto
Posts: 311

Hi Zippotrix !

These guys are sad !

Let me try to answer your qestios:

1- the assembling lay out posted by DriOn is very apropriate for you . _My only comment is to put one heat sink on each IRFP. It could be a alumminun plate 100x100x1.0 mm ( or a stack of several 100x100mm plates taken from bier can ).

2- No, it is not nescessary to be a toroid. The coil in the botton is a inductor, It is a ferrite rod coilled with several turns of wire. The inductor could be done indindg some wire in a ferrite toroid . Or even 100 turns of wire in a 25 mm PVC water pipe. I love air core indictors, as wire coiled in pvc pipe because it is very simple to calculate and no saturation of core.

In order to you to assembly and understand the circuit you need the a circuit schematic that show the electrical relationship between the conponents. The suggestion offered by DriOn on Mon Jun 11 2012, 08:44AM is ok.

The lay out or picture as shown Sat Jun 09 2012, 09:46AM just show the position of the components in the space, some wiring between the components.

Of course the connections in the lay out are to follow 100% the circuit squematic.

Regards

Newton

P.S Dont be surprized that Your 11V 200W halogen transformer to drive a flyback is almost the same that a good ZVS !

zippotix

Tue Jun 12 2012, 12:23PM

Registered Member #5208 Joined: Thu Jun 07 2012, 06:12PM
Location:
Posts: 86

Hello Newton, many thanks for your answer :). I decided to give it a shot, ZVS I mean. The halogen transformer I'm using is pretty strong (for me anyways:P, certainly stronger than 3055 loaded with 12V). Arcs strike at about 3cm, and can be stretched to about 5-6cm. They're not purple, but yellowish, but not as hot as ZVS. My only problem right now is getting something to power the ZVS. As I understood, it needs minimum of 12V/10A?

brandon3055

Tue Jun 12 2012, 12:59PM

Registered Member #4548 Joined: Mon Apr 23 2012, 03:52AM
Location: tasmania
Posts: 271

You could use a boost converter to give you between 15v-20v from your halogen transformer or you could rewind an MOT

Dri0m

Tue Jun 12 2012, 02:06PM

Registered Member #4497 Joined: Thu Apr 19 2012, 12:53PM
Location: Behind you
Posts: 62

zippotix wrote ...

As I understood, it needs minimum of 12V/10A?

sometimes, when my batteries are extremely overloaded, ZVS ran for 7V, and it was fine, so, you transformer is OK :)

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