ZVS Induction Heater
H8erade, Mon Jan 09 2012, 09:56PMHey, everyone. I'm making a low-power induction heater based on the ZVS circuit, but there is a problem.
The actual oscillator is functional, but my workpiece (a small nail) doesn't appear to... change temperature. The inductors make a high-pitched squeal, like normal.
This modified image shows my component specifications:
I think the current might be too low... any ideas? Thanks.
Re: ZVS Induction Heater
Platinum, Mon Jan 09 2012, 10:17PM
I used a old flyback core, because I though I'd damage my ZVS (IRFP250's) and I used 6+6 on the flyback core (my PSU si crap, it will short if less than 6+6) and 8 on the secondary, and a work coil made from an inductor from a PC motherboard and at 65W I can turn a screwdriver red hot.
Platinum, Mon Jan 09 2012, 10:17PM
I used a old flyback core, because I though I'd damage my ZVS (IRFP250's) and I used 6+6 on the flyback core (my PSU si crap, it will short if less than 6+6) and 8 on the secondary, and a work coil made from an inductor from a PC motherboard and at 65W I can turn a screwdriver red hot.
Re: ZVS Induction Heater
H8erade, Mon Jan 09 2012, 11:11PM
Thanks for the reply, Platinum.
I did as you suggested, but there was no improvement. Also, the inductor (center-tap ZVS, so just one) only squealed when the battery's positive terminal was connected in a certain position.
H8erade, Mon Jan 09 2012, 11:11PM
Thanks for the reply, Platinum.
I did as you suggested, but there was no improvement. Also, the inductor (center-tap ZVS, so just one) only squealed when the battery's positive terminal was connected in a certain position.
Re: ZVS Induction Heater
Platinum, Mon Jan 09 2012, 11:56PM
Can it drive a flyback?, check that, if it can't somethings wrong.
Btw in your schematic you are using a 12v 1.3Ah battery. That's 15~watts, you need atleast 100watts for a even working heater.
That will bearly even drive a flyback, I've tried 12v at 1A for fun, and I can shock my self with it.
I can get a screwdriver red with 65Watts, but it takes a while.
Platinum, Mon Jan 09 2012, 11:56PM
Can it drive a flyback?, check that, if it can't somethings wrong.
Btw in your schematic you are using a 12v 1.3Ah battery. That's 15~watts, you need atleast 100watts for a even working heater.
That will bearly even drive a flyback, I've tried 12v at 1A for fun, and I can shock my self with it.
I can get a screwdriver red with 65Watts, but it takes a while.
Re: ZVS Induction Heater
H8erade, Tue Jan 10 2012, 12:31AM
H8erade, Tue Jan 10 2012, 12:31AM
wrote ...
Can it drive a flyback?, check that, if it can't somethings wrong.
It can, but the sparks aren't that great.Can it drive a flyback?, check that, if it can't somethings wrong.
wrote ...
Btw in your schematic you are using a 12v 1.3Ah battery. That's 15~watts, you need atleast 100watts for a even working heater.
How do you find the watts based on ampere-hours and voltage? Did you just multiply 12 by 1.3?Btw in your schematic you are using a 12v 1.3Ah battery. That's 15~watts, you need atleast 100watts for a even working heater.
Re: ZVS Induction Heater
Platinum, Tue Jan 10 2012, 12:39AM
Yes, it should be 15.6watt/H...
That's really bad power get a better PSU, or battery, alot of people use 12V SLA's, like 12v 7aH.
With the power you have you won't be able to make a induction heater, maybe a capacitor bank charger, but that's it, and also a lifter.
Platinum, Tue Jan 10 2012, 12:39AM
Yes, it should be 15.6watt/H...
That's really bad power get a better PSU, or battery, alot of people use 12V SLA's, like 12v 7aH.
With the power you have you won't be able to make a induction heater, maybe a capacitor bank charger, but that's it, and also a lifter.
Re: ZVS Induction Heater
H8erade, Tue Jan 10 2012, 12:42AM
H8erade, Tue Jan 10 2012, 12:42AM
Platinum wrote ...
Yes, it should be 15.6watt/H...
That's really bad power get a better PSU, or battery, alot of people use 12V SLA's, like 12v 7aH.
With the power you have you won't be able to make a induction heater, maybe a capacitor bank charger, but that's it, and also a lifter.
Thanks! You probably saved me a lot of unrelated troubleshooting. I should probably get started on that new power supply.Yes, it should be 15.6watt/H...
That's really bad power get a better PSU, or battery, alot of people use 12V SLA's, like 12v 7aH.
With the power you have you won't be able to make a induction heater, maybe a capacitor bank charger, but that's it, and also a lifter.
Re: ZVS Induction Heater
Platinum, Tue Jan 10 2012, 02:16AM
No problem, for the ZVS 3 12v SLA's in series work well, I'm trying to get PC PSU's for 24v at 15A~, that will make a excellent induction heater, and my spark gap Tesla coil will be on steroids, 65w is fail...
Have fun anyway!
Platinum, Tue Jan 10 2012, 02:16AM
No problem, for the ZVS 3 12v SLA's in series work well, I'm trying to get PC PSU's for 24v at 15A~, that will make a excellent induction heater, and my spark gap Tesla coil will be on steroids, 65w is fail...
Have fun anyway!
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