Thanks for the answers.
>I can't advise what control IC can accomplish this.
LM5145 have synchonisation I/O anm is possible synchronise more Power supply.
>I doubt that the output filters are suited for pulsed operation
That is a question :sad:
However 250kHz and high frequency sources have a lower L C at the output than common welder machine, I think.
I have come across another thing
TIG welding machine have HF high voltage ignition.
HF generato on output high frequence high voltage ignition voltage for example 6k V
In welding machine is on output big col working as transformer see picture over lagre 2x8mm coil going welding large DC current and over secundar winding going HF voltage for example 15kV and this volta is the result is on a big coil, large DC welding current and large AC voltage for ingition.
But I do not understand how high the voltage will not damage C and Q before the coil