I'm looking for a voltage regulator for an AC welding machine I made. It is like the voltage regulators in welding machines, is the one I'm looking for. I need it for 50 volts at around 500 amps. 50 volts is the highest rms voltage it'll see. It'll settle around 42 to 44 volts rms. Does anyone know where I can get a voltage regulator for 500 amps 50 volts AC?