Power tracking of resonant inverter with soft-switching over full load range for induction heating applications

Abstract

Induction heating (IH) is nowadays widely used in domestic, industrial and even medical applications because of its advantages such as cleanliness, direct and fast heating, better efficiency etc. Advances are taking place rapidly in the technologies mainly in the power electronics section and the control used in IH. This paper analyses a voltage fed inverter with the power control strategy that allows the inverter switches to operate at zero voltage switching at a load range from 0-100%. The frequency is maintained constant and thus the switching losses are minimized. The soft-switching achieved over the entire load range improves the overall efficiency and the results are analyzed using MATLAB/Simulink.