... IGBT,MOSFET Copper induction coil contain four types (Medium frequency,High frequency,Ultrahigh frequency,Double frequency) it is appliying forclasses of machine parts to heat ... adopts Siemens IGBT,MOSFET and any other new type induction heating machine. 2.Fast speed,low power consumption,small volume,light ... current,over voltage,lack of water,phase fail,over hot,etc. 3.It has the function of manual, ...