BEST FLYBACK DRIVER / High Voltage / Forums

Forums

4hv.org :: Forums :: High Voltage

« Previous topic | Next topic »

BEST FLYBACK DRIVER

1 2 next

Move Thread

LAN_403

Fabi

Mon Dec 20 2010, 09:39PM

Registered Member #3510 Joined: Mon Dec 13 2010, 08:31AM
Location: western germany
Posts: 19

Hi,

I found servral circuits in the internet...
So. whats the most powerful one?

The Royer driver aka Mazzili driver

Or a PWM driver with some ICs
(...TL494...IGBTs and driver...)

or whatever

The complexity dosen't play a role

If you think you have THE DRIVER please post it

greets

Fabian

U4R1A

Mon Dec 20 2010, 09:43PM

Registered Member #3505 Joined: Sun Dec 12 2010, 06:03AM
Location: Albuquerque NM
Posts: 108

I think the ZVS is the best check out this vid http://www.youtube.com/watch?v=sxmI7QPC4Uk

Dr. ISOTOP

Mon Dec 20 2010, 10:05PM

Registered Member #2919 Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652

I second U4R1A; ZVS is definitely the best driver out there.

Fabi

Mon Dec 20 2010, 10:14PM

Registered Member #3510 Joined: Mon Dec 13 2010, 08:31AM
Location: western germany
Posts: 19

WOOOOW
thats MAD!!

I agree with you guys!

So I've no sound... seems to be the royer one, huh? ;)

U4R1A

Mon Dec 20 2010, 10:26PM

Registered Member #3505 Joined: Sun Dec 12 2010, 06:03AM
Location: Albuquerque NM
Posts: 108

Yea the vid you watched was with a dual primary I was trying out. Make sure if you use the dual primary you add the resistors in there or you will fry your primary.

Fabi

Mon Dec 20 2010, 11:03PM

Registered Member #3510 Joined: Mon Dec 13 2010, 08:31AM
Location: western germany
Posts: 19

gosh.. i saw it again ;)

well the next days I'm gonna try that.

Just have to wait for the parts (5W resistors...)

I'll post my experience

quicksilver

Mon Dec 20 2010, 11:23PM

Registered Member #1408 Joined: Fri Mar 21 2008, 03:49PM
Location: Oracle, AZ
Posts: 679

I think if you are realistically going to answer that question here are some issues that should be discussed or at minimum thought honestly about.... Yes the ZVS will get some damn fine arcs, so will a MOT and a MOC. That does not make them the best choice for learning the elements of an HV hobby.

What is your level of experience with HV? The level of energy produced by a well functioning, well supplied ZVS can easily be lethal. because you understand the type elements; I am making an assumption you know some of the issues involved but assumptions can be a bad thing; so for the sake of your welfare & my conscience I would outline a few other issues.

What is your power supply? If you do NOT have a high current PSU the ZVS is really not the best choice. The actual design was made for a (relativity) higher current input. In fact pushing less than 5A into the classic Mazilli schematic won't give much more than many rudimentary designs.

What quality / construction and size of of LOPT do you plan to use? There are some that simply cannot handle the current from a ZVS / Royer; thus giving you a driver that kills your transformers (not too likely but possible).

Finally, (of course, this is all opinion only) if you do not have experience enough to make a ZVS in a safe manner and or do not have the parts available to make and (occasionally replace) the MOSFETs in a ZVS under learning conditions, you should make an effort to have at least a back-up of those parts & a complete understanding of the safety issues involved. Stringing wires about on a table can be a very unsafe practice for those who do not really check their work, understand the inherent dangers or create an unsafe condition by a complexity of hot leads in a confusing manner.
YES a Royer-type driver will get you some damn fine arcs but without the experience to draw and arc safely and shut down the componentry, even a hot cap can bring some serious problems.
Getting shocked is not the only way a person can get hurt. Getting zapped and being thrown into something whereby you crack your head open is not a good thing either. Just as starting a fire can be very serious etc, etc.

There are unanswered questions that lead one to a responsible series of further questions without simply going for the gold. No one wants to see a fellow hobbyist getting hurt. The majority of people I know who drive well started slowly. If all of this is old news to you then please excuse the whole thing as it was written in an element of concern so that you could enjoy the hobby & in NO MANNER to diminish your knowledge.

Arcstarter

Tue Dec 21 2010, 12:31AM

Registered Member #1225 Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253

I basically agree with Quicksilver. The word 'best' can mean many things, be it efficiency, reliability, availability of parts, power output, size efficiency, the level of experience required etc.

But, like everyone else said, the Royer driver is a great compromise between all the above.

Dr. ISOTOP

Tue Dec 21 2010, 12:34AM

Registered Member #2919 Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652

If you've never worked with high voltage before, a single-transistor flyback driver is a good way to start. Sure, its inefficient and kills transistors, but its easy to build, safe-ish, and the power transistor can be harvested from a CRT or TV.

ubuntupokemoninc

Tue Dec 21 2010, 12:50AM

Banned on 1/22/2011 for repeated rule violations after multiple warnings.
Registered Member #3299 Joined: Sat Oct 09 2010, 08:11PM
Location: Bantown, USA
Posts: 220

that is the best ever! 100kv from a flyback

1 2 next

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob