Design and Analysis of Series Resonant Inverter-Based Induction Heating Equipment Employing Power Factor Correction for Harmonic Attenuation

Abstract

The proposed topology is designed in an attempt to reduce the harmonic distortion introduced in the High-Frequency Induction Heating equipment (IHE), using integrated switching Boost PFC converter. When induction heating equipments are switched at high frequency, harmonic currents are introduced into the system. Harmonic currents are undesirable as they tend to flow back towards the input and results in deterioration of power quality. A Boost Power Factor Correction (PFC) circuit can be efficiently used to reduce the harmonic distortion of power supplies which are produced because of switching at high frequency. The aim of this paper is to design an inverter circuit which generates continuous sinusoidal input current and increase the power factor so that the Total Harmonic Distortion (THD) at the supply side of the system is negligible. Active PFC circuit such as the Boost PFC consists of control devices which regulate the total power absorbed by a load and to achieve a power factor close to unity. Moreover, the design is also compared to an IHE without the PFC to study the effectiveness of the PFC converter in induction heating application.