... parts to quenching,anneal 2.Adopts Siemens IGBT,MOSFET Copper induction coil contain four types (Medium frequency,High frequency,Ultrahigh frequency, ... field and with CE predominance as belows: 1.The induction heating equipment mains circuit adopts Siemens IGBT,MOSFET and any ... other new type induction heating machine. 2.Fast speed,low power consumption,small ...