Approximate transformer model of electromagnetic  induction heating system

CONG Zhi-peng， QIN Hui-chang， WANG Hong-guang， YAN Xiao-song
（Yantai Power Supply Company， Yantai 264001， China）

Abstract： To solve the problem of estimating the controlling voltages of certain temperature distribution，an approximate transformer model was introduced to electromagnetic induction heating. The heating coils and heating object were firstly equivalent as 3 inductance coils respectively as approximate transformer model's primary and secondary coils. Secondly，the resistance and inductance parameters and secondary coils' currents were calculated. An equation involving primary coils' controlling voltages and secondary coils' currents was deduced according to all the coils' mutual inductances. The controlling voltages were estimated by the equation. The temperature distribution corresponding to the estimated controlling voltages was simulated by ANSYS software. The research results indicate that the controlling by the approximate transformer model meets the need of target temperature distribution.
Key words： equivalent coils； voltage estimation； numerical calculation