Water cooled Royer induction heater
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Previously, I showed an induction heater circuit I built. It worked well but was bulky and the heating coil tended to get hot since it was not water cooled.
So I tried using litz wire but that didn't seem to help with coolness, so I tried using copper tubing with water flowing through it.
This runs much much cooler, although in either case the capacitors get hot. B
Due to the larger diameter of the copper tubing, my turns are spread out, which seems to reduce the magnetic field density inside the coil, so it doesn't seem to heat the nail as fast or as hot.
But at least it seems to be able to run continuous duty without getting hot.