I really want to build a simple but powerful induction heater for hobby blacksmithing.
Metal shaping and the design of the cooling system within the coils are not a problem.
I need help understanding the electronics
Obviously I must first use a transformer as a safety against "backlash" to the grid and my house. So I might as well change the amount of current and voltage.
1st question: What are the optimal values for both voltage and current? Let's say I want to heat a 250mm long steel bar, roughly 25mmx25mm cross section. I need 1300 degrees celsius or more.
Max. amp at the wall: 16A. 220V to 230V
(Should I max out the voltage or the current? same as in the wall? etc.)
2nd. question: What is the optimal frequency on the AC for such a device? Does it change a lot based on the shape/size of the bar? (materials?) Is there a safe/reasonable/affordable way to modulate frequency for a layman like myself? It would be nice if I could set it and forget it. The size of the coil is finite anyway.
3rd. question: If i manage to install three-phase power in my house, does that change any of the other answers?
4th. question: Are there any other electric properties I have not considered, which are important to get this to work properly?