DIY Induction Heater Builds and References

[Dns18_05]

I have to try to measure it again but my multimeter couldn't measure the current draw of this circuit
I'd need to test what wattage is suitable for the Tempest since it has much more thermal mass

 

[Dns18_05]

I might just add a high power DC-DC converter and find a suitable voltage? Are there any other options besides changing the coil length again?

 

[TommyDee]

I really like this one: https://www.ebay.com/itm/396860428631?_skw=dc-dc+converters&itmmeta=01K0J3FNBK8456WVGN7MGEGX3G
I used it on an old 19V 4.5A laptop charger. These will convert voltage into current so you can produce up to 8 amps with it.

This DC-DC converter has a 12V max output switch that really helps a lot and the bonus of a remote potentiometer. This will make up for the coil wire, but not more than it will do at the full 12V.

 

[jackrod]

You can easily dial in the power using a variable voltage power supply. That can be a lab supply or adjustable DC-DC converter. Lab supply is nice since it allows constant current operation too, and will display voltage/current applied. Some show the power too. Like this one https://www.amazon.com/Jesverty-Adjustable-Switching-Regulated-Quick-Charge/dp/B0CZ92WTQ3 They are good for experimenting but big and bulky. You can get buck/boost converters, too, some of which can also display the power. Like https://www.amazon.com/SK-120-Converter-Display-Regulated-Laboratory/dp/B0D9H3Z637. But make sure they can supply enough current for an IH, that one is limited to 6A. Some more higher power options without display, like the one @TommyDee just posted.

If you are building a portable, though, neither of those options is great. A lab supply could let you tweak the coil until it operates in the proper range when running on your battery voltage.