Fuzzy phase-lock-loop for a two-output high-frequency series-resonant induction heater

This paper presents the design and concept of fuzzy phase-lock loop for a two-output high-frequency series-resonant induction heater. This conceptual controller is applied for an unknown mathematical model as well as this prototype, which is used to maintain Zero-Voltage Switching condition along with the period by automated adjusting switching frequency. The power of the prototype can be controlled by using 3 branches of full bridge series-resonant inverter: one branch for common controlled and others controlled for each independently two-output. The simulation result is verified by MATLAB/Simulink®.