... 25KHZ, with built-in IGBT and the application of PWM technique, and reduces voltage, rectifies current and outputs a high DC power ... down electrode .Characteristics:Adopt advanced inverter technology and IGBT switch element, high efficient and save power .Adopt PWM pulse modulating technology, ... of carbon steel, iron, stainless steel, copper, titanium and other alloys.b. It can be widely used in ...