I'm trying to design a very low power (<=10W) inductive heating circuit that will heat the work material to 40-50degC. I've seen plenty of Royer Oscillator circuits online (see here: http://www.rmcybernetics.com/images/induction-heater-schematic.jpg) but how can the temperature output be configured in the circuit? Also, I want to make the power draw as low as possible. What are some parameters I can play with to achieve these design constraints?
Well, the power draw will be pretty dependent on how much power you're dumping into your load, varying the supply voltage would be a pretty simple way of regulating the power output of a resonant circuit.