A Novel Power Control Technique for Series Resonant Inverter-Fed Induction Heating System with Fuzzy-Aided Digital Pulse Density Modulation Scheme

The research on Induction heating aided by power electronic control system is so vivacious in recent past. The selection of switching techniques remains to be the bottleneck for power engineering research as inappropriate selection may result in relentless switching loss, conduction loss, high current ripple, and lower power density. Therefore, modern design emphasizes multi-output resonant inverters, which not only have high efficiency but also facilitate resonant switching. This work proposes a single-stage ac-ac dual half-bridge series resonant inverter, with reduced number of switching devices. The proposed converter is controlled with fuzzy logic-aided digital pulse density modulation technique which aids in power control task. This intelligent power control scheme improves the system efficiency with less time-domain specifications. The simulation of the work is realized in MATLAB/Simulink arena, and hardware circuits are validated using dsPIC30F4011 microcontroller. The results reveal that the proposed schemes are highly viable and effective for the rendered application.