More Induction Heating

A tour of my new induction heater. This is a work-in-progress between two designs, a low power unit which can run from 120V, and a high power unit good for 10kW or so. The control circuit is well overbuilt in comparison to the output stage, because I'm testing pieces as I build them.

The major difference between this and previous models is the output network, which is series resonant, driven through a power transformer. The network response is so much nicer now, and inverter power factor is actually usable. Power output is already more than I've ever had before, especially from a 120V test. Compare the last section of this clip to my previous test.

Category:

Science & Technology

Tags:

• induction
• heating

[UltraDavidson37]

What is the current shown in the second channel of the oscilloscope?

[T3sl4]

@UltraDavidson37 Inverter current. If I recall correctly... 20A/div scale?

[patnor1011]

Love this. Good job. Is there any chance that you can build that for in some box and put that for sale? I will be interested to buy something like that. pat.

[T3sl4]

@patnor1011 Check my newest video to see this installed in a professional box (not to mention a working control circuit!).

[biowerks]

This may be a stupid question but is the coil only able to heat up metallic objects? For example can you put your finger in there and burn it?

[T3sl4]

No, a finger isn't conductive enough to feel anything from this heater (but do beware of rings!).

RF heaters (running at 10MHz+) generate enough voltage to be dangerous by electric shock, RF burns and induction.

[nathan5647]

burning galvanized metel can kill you

[GunClingingPalin]

@mrhockey50 yeah 1 whiff could kill you.

[mrhockey50]

heating up galvanized zinc i dont think is very good for you

[UltraDavidson37]

Then according to this, what is the best configuration for the output stage as the tank circuit? a series or parallel.

¿How these settings affect the impedance matching?

Tanks

[xXLoVeRandHaTeRXx]

im only 13 but im good at electronics kind of..... this is way to complicated for me how long were you into electronics???

[GunClingingPalin]

zinc fumes kill bro

[themainproblem]

For example..... The signal starts here at the PWM chip and then it goes here and this happens. 

[themainproblem]

Tim, your efforts are are very impressive and you are a super sharp guy but I think that a lot of these people looking at your stuff would like a very clear explaination on the basics of how it works. From begininning to end. Make it easy to understand for someone like me who has no grasp of induction heating.