REVIEW ON DIFFERENT CONTROL METHODS USED FOR INDUCTION HEATING APPLICATIONS

Different control methods like fixed and variable -frequency operations on Series Resonant Inverter(SRI) that are used in Induction Heating applications are reviewed in this paper. The advantages of Series Resonant Inverter are being its high power density with high efficiency for wide input and output load range. The other advantages like reduced output voltage ripple with high power factor can be achieved for SRI's. In practice, SRI's operated at high frequencies (kHz to MHZ) results in the increase of turn-off and gate charge losses leading to the reduction in the efficiency of Inverter. Different Control Methods implemented on SRI are reviewed for Induction Heating(IH) application in this paper. The review includes merits and demerits of these control Methods along with their applications.