Chuck norris flyback driver / High Voltage / Forums

Forums

4hv.org :: Forums :: High Voltage

« Previous topic | Next topic »

Chuck norris flyback driver

previous 1 2 3 4 next

Move Thread

LAN_403

Dr. Dark Current

Tue Jan 18 2011, 09:27PM

Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384

Arcstarter: You are right... but here in a 230 V land, it is almost impossible to make this driver mains powered

Arcstarter

Tue Jan 18 2011, 10:28PM

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

Ahh, i gotcha Dr KV

Though, IGBT's do come in two flavors, 600v and 1200v, which 1200v would be perfect for mains in your corner of the earth

.

Now that i saw this thread, i am going to attempt to make what seems to be the world's strongest 'ZVS' driver. Then again, it's not that hard to do, considering this very circuit has only been seen by a few thousand 4hv members and visitors, and some other enthusiasts around the web. Here is a huge hint, the switching devices with have a dissipation of 1130 watts in all. I will make it for proof of concept, not practicality, but i should be able to run around 500w-1kw 24/7 with no heatsink!

ubuntupokemoninc

Tue Jan 18 2011, 10:30PM

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

Now what rules did i break?! you seem oblivious to the fact that I'M 14 YEARS OLD!!!!! Go ahead and ban me!

I need mega help with this stuff no one around me has a clue about any of this stuff i learned everything on my own!

Turkey9

Tue Jan 18 2011, 11:30PM

Registered Member #1451 Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661

There are a lot of us here that are really young. Strive to be mature and post at the level of the other users.

On the topic of this thread... Won't there be huge losses dealing with core saturation when you try to push such large currents through it? As I understand it the air gap is there to fight this, but won't there still be a point where all the extra energy put in is wasted as heat in the core?

Bjørn

Tue Jan 18 2011, 11:34PM

Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058

1. "Do not type ALL IN CAPS"
2. "punctuation"
3. "Do your own research."
4. "Stay on topic."
5. "Do not back-talk or debate the intent of a rule in a thread"

This is a grown-up forum but we let everyone play along independent of age, the only requirement is that people respect the rules and our way of doing things. For example the "Chuck Norris" internet meme is not appropriate on the High Voltage forum. The reason it is not appropriate is that it is off topic, it has nothing to do with high voltage.

There are lots of people ready to help you but in return you have to be patient and show some respect. Learning these things will take time and work, there is no short cut.

Try to observe how the old members do things around here and try to go with the flow, it will make it easier for everyone.

Ash Small

Wed Jan 19 2011, 05:42AM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

Pokemon, you may want some of these for switching 960 Volts:

800Amp, 3300Volt IGBTs (DIM800NSM33-F000) Â£1,892.52 (around 3000 Dollars each, from eBay)

Matt Edwards

Wed Jan 19 2011, 05:55AM

Registered Member #2838 Joined: Fri Apr 30 2010, 07:55PM
Location: tehachapi, CA
Posts: 333

Aside from the obvious credit should always be given for thinking outside of the box

Filip Kofron

Wed Jan 19 2011, 07:06AM

Registered Member #2869 Joined: Thu May 20 2010, 05:31PM
Location: Czech Republic
Posts: 1

Here in 230v land, we can hook up a step-down transformer YT
I think it's better to use a simple half bridge driver instead. That can work
on 325v well and when well designed it can bring much more power
than a ZVS driver.

Do you know of any flyback core that can stand the full potential
of mains (3680W) ? Connecting more flybacks in parallel didn't
work well for me..

Arcstarter

Thu Jan 20 2011, 01:40AM

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

Filip Kofron wrote ...

Here in 230v land, we can hook up a step-down transformer YT
I think it's better to use a simple half bridge driver instead. That can work
on 325v well and when well designed it can bring much more power
than a ZVS driver.

Do you know of any flyback core that can stand the full potential
of mains (3680W) ? Connecting more flybacks in parallel didn't
work well for me..

A typical medium sized flyback's core can pass at least 1kw according to my measurements. The most i have put through one of the cores was 1.3kw with a fullbridge, but it may go even higher.

Stacking cores should work. An 8kw ferrite transformer i have is made from 5 pairs of E cores stacked together.

Also, some people have used two of the cores 'back to back', which forms a faux-E core. They wind the primary on the 'middle leg' and leave the secondaries on, and parallel them. I cannot find a picture of this, but say the character U is one half of a flyback's core, UU is how the flybacks are placed, and held together with the single primary. Sort of like an NST, if you grounded the two ground leads.

James

Thu Jan 20 2011, 01:41AM

Registered Member #3610 Joined: Thu Jan 13 2011, 03:29AM
Location: Seattle, WA
Posts: 506

You can already put more power into a flyback at a far lower voltage than the core can handle without saturating. To increase the input voltage you will need to increase the primary turns in order to limit the amps per turn through the primary. Rectified mains is certainly possible with sufficiently rated components. I have some electronic neon "transformers" that rectify and double (120V land) the input to a 330VDC bus and then drive a transformer with a ~70 turn primary winding using a circuit very similar to the Mazzilli driver.

The output voltage depends on the volts per turn and the ratio between the number of turns on the primary and the number on the secondary. Core saturation depends on the amp-turns in the primary.

It goes without saying that you need to be careful with this stuff. It's fun, but the output of one of these drivers can easily kill you.

previous 1 2 3 4 next

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