Usefulness: power,heater,smelting,quench,sinter or other it has put forth full series of IGBT and Recifiertype IF and Ultrasonic Power Supplies.Moreover,new breakthrongh has been achiev- ed in their power,so that power of single set furnace can reach 12000Kw and frenquency range can be 0.25KHz~60KHz,which can fully meet requirements of application in all kinds of heating conditions,such as smelting,inductive heating,quench and so on.