... parts to quenching,anneal 2.Adopts Siemens IGBT,MOSFET Copper induction coil contain four types (Medium frequency,High frequency,Ultrahigh frequency ... smelting, other field and with CEpredominance as belows: 1.The induction heating equipment mains circuit adopts Siemens IGBT,MOSFET and any ... fail,over hot,etc. 3.It has the function of manual,semi-automatic,full-automatic and divide period to control, it ...