Abstract
Electromagnetic heating stove is used induction heating technology.The Intermediate Frequency Induction Heating has been widely applied in melting,casting,bend,hot forging,welding.Surface Heat Treatment due to its advantages of high heating efficiency、Improving rapidly、easily controlled、easily being mechanized and automated. IGBT electromagnetic heating boiler used as switching devices, which can work in 10 Hz - 10 kHz frequency band.It consists of rectifier,filter,and the inverter components.Controlled Rectifier is not used the entire three-phase bridge rectifier circuit.Filter is used by an electrolytic capacitor and inductor components II-type filter and passive PFC.Inverter control mainly used by the MCU 74 LS686 generated wave PWM control for the opening four and IGBT turn-off.The main chip microcontroller 89C52 tents and 74LS686PWM wave generator is used in this design.As EXB841 with fast switching speed (500ns),optical isolator,fault state feedback.It can automatically reset, shut down automatically,and other functions,so as to choose their IGBT driver.Design process takes full advantage of the 89C52 tents control performance,control system is not only fast response but also has the ideal control accuracy.