Frequency Doubling Power Supply for Induction Heating Based on Center-Tapped Transformer
Lu Hua1, Hu Jingang1, Bi Chuang2, Xiang Yong1
1. School of Energy Science and Engineering University of Electronic Science and Technology Chengdu 611731 China; 2. School of Aeronautics and Astronautics University of Electronic Science and Technology of China Chengdu 611731 China
Abstract A novel multiple-frequency power supply is proposed for high frequency high power induction heating appliances based on center-tapped transformer. Its output frequency is as twice as the device frequency, by using two symmetrical half bridges, sharing two equal resonant capacitances and coupling with center-tapped transformer. Each power switch has zero voltage switch (ZVS) soft switching characteristic, and its conduction time is only a quarter of switching cycle. Thus the power consumption of the switches decrease significantly compared with the traditional inverter. The eight operation modes are analyzed, and the design methods of circuit parameters are also present. Taken IGBT as power switches, a prototype is designed to verify the power supply topology, the theoretical analysis and the circuit parameter selection method.
Lu Hua,Hu Jingang,Bi Chuang等. Frequency Doubling Power Supply for Induction Heating Based on Center-Tapped Transformer[J]. Transactions of China Electrotechnical Society, 2016, 31(24): 188-194.
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2016, Vol. 31 
