Sanity Check ZVS Induction Heater

Hi I just want a sanity check on this before I put it all together.
I am trying to control a ZVS Induction Heater both the power output and the time it is on. The design is based on this video I found: Controlling LM2596 buck-converter with microcontroller

I would like to control the heating output a little more than just on or off, from my research this seems the best way. The IH only gets used 1-2 a day maybe, for a couple of sec (~10?). I also want to have several heating profiles (time/power) that will be run when different buttons are pressed. I have tested manually tuning the pot on the buck converter and it seems the result based on the converter output voltage is as desired.

I have a Arduino pwm -> Low pass filter -> Op amp -> Resistor -> buck converter -> IH

LP Filter:
R = 10k Ohm
C = 2u F

IC 741

Resistor (calculated):
5.1k Ohm

R1 = 1.7k this is measured as the diagram is just "typical application"
R1 diagram = R_5 video

Buck Converter:

Generic ZVS Induction Heating Module 5V-12V

What is the power rating of the induction heater?
Can you please post a link to data/specs?
What are you going to use for your power supply to the DC-DC converter?

Thanks.. Tom... :smiley: :+1: :coffee: :australia:

I got the IH quite a while ago so I dont have the link to the exact item, but I think it was a knockoff/clone. This looks almost the same as the one I have with specs lower down:

I am using a basic AC-DC 12V 5A power supply (SP-1205). I have tested using the IH at 12V and the max I've seen it draw is 4.3A

Why do you think that? :face_with_raised_eyebrow:

I think you will find your induction heater is a very crude power oscillator, I have one and its pretty basic.
It may not run or start under reduced current.

Tom... :smiley: :+1: :coffee: :australia:

An example is the video that is in the original post. But if you think there is a better way, I am all ears

Thanks I will keep that in mind. It did seems to work in the specified ranges 5-12V, but if it stops this might be the reason

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