http://www.iaeme.com/IJEET/index.asp 55 editor@iaeme.com International Journal of Electrical Engineering and Technology (IJEET) Volume 11, Issue 5, July 2020, pp. 55-63, Article ID: IJEET_11_05_006 Available online at http://www.iaeme.com/ijeet/issues.asp?JType=IJEET&VType=11&IType=5 ISSN Print: 0976-6545 and ISSN Online: 0976-6553 DOI: 10.34218/IJEET.11.5.2020.006 © IAEME Publication Scopus Indexed REVIEW ON DIFFERENT CONTROL METHODS USED FOR INDUCTION HEATING APPLICATIONS Dr. P. Kowstubha Department of Electrical and Electronics Engineering, Chaitanya Bharathi Institute of Technology, Hyderabad, India kowstubha_eee@cbit.ac.in ABSTRACT 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. Key words: Induction Heating, Series Resonant Inverters, resonant tank, soft- switching. Cite this Article: Dr. P. Kowstubha, Review on Different Control Methods used for Induction Heating Applications. International Journal of Electrical Engineering and Technology, 11(5), 2020, pp. 55-63. http://www.iaeme.com/IJEET/issues.asp?JType=IJEET&VType=11&IType=5 1. INTRODUCTION In Pulse-Width-Modulated (PWM) Inverters, the switches undergo switched mode operation. In this operation, the switches experiences high switching stress and switching losses. This switching losses are in linear proportion to switching frequency of the system. Therefore, electromagnetic interference produced in this mode of operation is large due to high dv/dt and di/dt values. Resonant Inverters/Converters with high frequency operation have come into existence to overcome the limitations posed by PWM converters. In these systems, resonant switch is used in place of PWM switch. In this resonant switch, an LC- resonant circuit is developed such that current through the switch and voltage across the switch are enforced to pass zero crossings. [1],[2]. Many tank circuits that come as voltage / current-type are available in the market. These types can be determined by the resonant tank signal which transfers the