Salvador12
Full Member level 4
I'm helping out a friend who is a metal worker, thing is he would need an induction heater but he would need to heat both large pieces as well as smaller individual ones like parts of a single shaft or gear.
My idea is then this, in order to make this safe both for the worker and for the electronics involved I would get a 3 phase mains transformer make a secondary and rectify that secondary so that I get somewhere around 100 volts DC. then use either an half bridge or rather a H bridge to drive the work coil.
Normally I see some resonant circuit being used for the work coil in order to minimize current and increase impedance for the switches but in my case it would be ideal if I could simply have a H bridge with a big enough dead time between pulses and capable of powering multiple work coils from small ones to large ones so that he can swap them as he needs when working with different pieces.
In other words have some brute large current IGBT's being powered from a rectified 3 phase DC source with modest voltage being able to drive various loads both small and very large ones.
Any advice or possible schematics would be much appreciated as well as critique of my plans, thanks.
My idea is then this, in order to make this safe both for the worker and for the electronics involved I would get a 3 phase mains transformer make a secondary and rectify that secondary so that I get somewhere around 100 volts DC. then use either an half bridge or rather a H bridge to drive the work coil.
Normally I see some resonant circuit being used for the work coil in order to minimize current and increase impedance for the switches but in my case it would be ideal if I could simply have a H bridge with a big enough dead time between pulses and capable of powering multiple work coils from small ones to large ones so that he can swap them as he needs when working with different pieces.
In other words have some brute large current IGBT's being powered from a rectified 3 phase DC source with modest voltage being able to drive various loads both small and very large ones.
Any advice or possible schematics would be much appreciated as well as critique of my plans, thanks.