Modeling and simulation of resonant inverter fed ferromagnetic load with asymmetrical voltage-cancellation control

This paper presents simulation of high efficiency LLC resonant inverter fed ferromagnetic load with asymmetric voltage-cancellation control technique. It uses a full-bridge topology for induction heating application. The converter can operate effectively even for fluctuating source and it operates in zero-voltage switching mode (ZVS). In spite of variation in load the operating frequency is automatically adjusted to maintain a constant lagging power angle. The switching devices need only a single DC power supply for gate driver circuitry. The output power is controlled by using the asymmetrical voltage-cancellation technique, which results in increase the overall efficiency of the ferromagnetic load. The Simulation results are presented.