ZVS Flyback Driver - First tests!

This is a few clips of my first ZVS Driver running a flyback. Supply is 14v with 5+5 turn primary.

A few people have asked for the diagram. It is the Mazzilli Driver, here is the schematic: http://sparkie.ukdirt.com/hv/Flyback_driver.jpg

The 400+v fast diodes I used are UF4007. Here is a picture of my built unit: http://sparkie.ukdirt.com/hv/zvs_driver_new.jpg

Category:

Science & Technology

Tags:

• ZVS
• Flyback
• Driver
• High
• Voltage
• Arc
• Arcs
• Sparks

[Alex1M6]

You are getting some nice arcs there.

What are you using as your power supply (not driver)?

[sparkie21]

@Alex1M6 This was just an old 13.8V 5A power supply.

[Pyromadness]

hi would this 1N4937 diode from maplins work as the fast diode. 600v @ 30A surge

[sparkie21]

@Pyromadness It may well do, its listed as a 'fast' rectifier. The UF4007 is an 'ultra fast' rectifier.

It will probably work but not as well. The frequencies involved in flybacks is quite fast for any standard rectifier diode.

Good luck!

[morganhv]

where did you get the IRFP250s?

[sparkie21]

Farnell

[tesladude19]

@sparkie21 hi, this comment was a really long time ago but i feel i should say something. the 1n4937 has a max reverse recovery of 200 ns, meaning, in theory you could run frequencies up to 5 MHz through them. and with your average flyback being ran at around 100-200 KHz those diodes will be way more than enough :) just saying :p

[Arjoonmoal]

you could get  a better control if you made a variable inductor

[ubuntupokemoninc]

@morganhv

digikey.com

[AKZak08]

great setup. i think you would get a bigger ark by customizing your inductor. less inductance more current more inductance higher voltage

[lollinna]

What is the buzzing sound in the background at 2:07?Is it the transformer power supply?

[mumish13]

@codex653 when i used these Mosfets they work pretty good... at 12V with good heatsink