Flybacks are designed to work best anywhere between 15 to kHz, so some experimentation is required to find the intended operating frequency. Hence, i turned to ZVS from that instance. However, you just disconnect the original primary from the 12V rail and get a separate D. The current source is sufficient — an old lead acid golf cart battery still giving In fact flyback transformers aren’t really conventional transformers at all, but coupled inductors which means they should be driven differently.

Uploader: Fesar
Date Added: 20 July 2017
File Size: 42.73 Mb
Operating Systems: Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads: 30692
Price: Free* [*Free Regsitration Required]

Flyback driver #2: NE555 quasi-resonant

Sign up or log in Xvs up using Google. Yes, as in the schematic — ground the negative supply, the flyback and its ferrite core all to mains earth. January 7, at Hey KhaSieu and Dylan Good results, all you need now is a higher supply voltage or more secondary coil windings for getting longer arcs.

It produces a lot of Ozone! Is there a rule of thumb that will get me moderate enough accuracy to make a good circuit? Take a look at the page about the Royer induction heater where this same circuit is described more in detail about ratings and some measurements.

Lastly, use the fifth pin for PWM audio modulation — you are going to need a 0. Since some energy is avalanched in the mosfet, adequate heatsinking of the IRFP is required. If yes, the secondary might be K.

Recent Drivers  MF3228 LINUX DRIVER

Have you tried zvz calculate the different resonant frequencies you get with different work coils? Adding a higher voltage should effect the frequencybecause it will be charging the tank cap faster than the lower voltage would. Which ferrite cores exact size and material do you have for transformer and inductor?

But anyway, magnet field indeed has an ability to deflect electron movement.

Mazilli ZVS flyback driver

The primary can be found by measuring resistance. Always check that the is still alive and well.

If you here a whining noise 25Khz or lower frequency you should reduce the number of turns on the primary slightly, or make the capacitor smaller, but smaller capacitor means that it wont be as powerfull or put the MOSFETS under more strain.

No less than twelve volts.

Zvd crappy ones will inflate and blow up. Thanks — the flybacks used here are generic 90ss CRT TV ones as described in my guide to flyback transformers. I will keep looking around to see what I can find, Cheers!

Flyback driver #2: NE quasi-resonant – BOGIN, JR.

Hi everybody, I not work in physics but interested in flyback circuit. I can only think of either drive frequency is too high or is there a large air gap in the core? The FETs were also fine with another flyback, which died due to arcing. I am a physics student with some experience with electronics. August 17, at Wind your own if it is to difficult to find.


Read this document about safety! It can properly run down to some kHz, not that I have tested it, but its an assumption based on time needed to switch state. In flyback mode with a 5 turn primary it will draw 15A 48v and 10A 20vproduces thicker, hotter arcs nowbut no noticeable voltage output i measure via air breakdown voltage, 10cm is the point at wich it starts to arc.

In the schematic its written if RC1 not used short it, it will be open not short. Actually when power grows up on the gate of my transistor the signal is really bad: November 1, at I have ordered parts for the ZVS driver you are using. I made the circuit and works fine.

My personal recommendation is whatever you do, just avoid hot glue, it makes things worse. It made a big difference, much hotter, thicker and longer arcs.