An Inverter Circuit Configuration Suitable for Vessels of Different Material for Multiload Induction Cooking Application

Abstract

—In heating applications, induction heating (IH) is a dominant technology in the market due to several advantages over conventional heating techniques. Most of the research in the past has focused on heating ferromagnetic (FM) material type vessels. Now, there is an increase in research for proposing topologies suitable for heating FM and non-FM (N-FM) type ves sels. In this article, an inverter circuit is proposed for heating FM and N-FM material vessels. A simple ON–OFF control is used for obtaining simultaneous as well as independent control for both loads. It offers linear power control. The range of power control for N-FM load is increased by using frequency-based control. The proposed inverter circuit has been simulated in OrCAD PSpice and experimentally verified with a prototype for 1624 W. It offers a peak experimental efficiency of 94.3%. It can also be extended for multiple loads by adding a low-frequency operated switch and a diode combination for additional IH load. A detailed loss analysis for the proposed inverter has been carried out using PSIM software. The simulation and experimentation results are in good accord with each other. Hence, the proposed inverter circuit is a suitable solution for heating FM and N-FM material vessels for multiload applications.