High-Efficiency SEPIC Converter for Single-Coil Induction Heating with Precise Current Regulation

This paper presents a new approach for regulating amplitude and phase angle in high-frequency Single CoilInduction Heating (SCIH) systems using a Single Ended Primary Inductance Converter (SEPIC). The proposeddesign ensures uniform temperature distribution by dynamically adjusting the coil current's amplitude and phaseangle. Unlike traditional Buck converter-based Zone Controlled Induction Heating (ZCIH) systems, the SEPICconverter eliminates mutual coupling effects and enhances efficiency from 96% to 99%. The transient response ofthe coil current is modeled as a first-order system, validated through MATLAB/Simulink simulations. The studyhighlights the advantages of SEPIC over Buck converters, including reduced complexity, higher efficiency, andimproved dynamic performance.