i built this circuit http://kipdev.nl/labs/wp-content/images/zvs_driver.png for a flyback driver and it works great! i can pull some wicked arcs with it. the mosfets dont even get remotely warm. ive been researching online about using the same circuit for an induction heater. i tried it for about a 10 second run as induction heater. the screwdriver got to hot to touch, but the MOSFETs got smoking hot. I tried it from 4+4 turns upto 7+7 turns. am i missing something or is there something i can do to modify the circuit so the FETs dont burn up?does the guage of the wire matter? thank you in advance

 

anyone have any ideas?

 

i hope we get some answers i have same question as the tread starter

any answers

Regards

 

i built this circuit http://kipdev.nl/labs/wp-content/images/zvs_driver.png for a flyback driver and it works great! i can pull some wicked arcs with it. the mosfets dont even get remotely warm. ive been researching online about using the same circuit for an induction heater. i tried it for about a 10 second run as induction heater. the screwdriver got to hot to touch, but the MOSFETs got smoking hot. I tried it from 4+4 turns upto 7+7 turns. am i missing something or is there something i can do to modify the circuit so the FETs dont burn up?does the guage of the wire matter? thank you in advance

Induction heaters use VAST amounts of current. Your flyback device is a high VOLTAGE system.....great for DIELECTRIC heating, not induction heating!

YOu need a stepdown transformer at the very least....to a mere fraction of an ohm.

eric

 

im using a zvs flyback DRIVER not driving a flyback but instead just the primary coil and as core the pice to be induction heated.

please advice

 

Perhaps you could post the circuit.

 

you need to take the core from a flyback wrap a 5+5 winding on it and then wrap about 5 to 8 turns of think gage wire on the other side. that gives you AC at a low voltage but at high amp

 

Maybe it's caused by your diodes...
At least, that what's happened to me before.

Use a faster diode...