Impedance matching of the inverter for induction heating

The impedance matching of source and load has influences on the ability to transfer power. In induction heating processes, the electrical parameters of the induction heating system can significantly differ. In the paper the comparison of sensitivity of power sources with different resonant systems on the changing the load impedance are presented. The possibility of increasing the elasticity of the inverter with LLC resonant circuit has been analyzed. The solution combining the controlled LLC circuit with a suitable algorithm has been proposed to automatically correct the substitute impedance of the load by the power source system.