An advanced PI control strategy of Dual-Mode-Operation Resonant Converter for Induction Heating

Abstract

Induction heating (IH) technology is nowadays widely present in domestic appliances because of its cleanness, high efficiency, and faster heating process. All of these advantages are due to its heating process, where the pot is directly heated by the induced currents generated with a varying magnetic field. As a result, the glass where the pot is supported is not directly heated and, consequently, efficiency and heating times are improved. IH systems are based on dc-link inverters to generate the required alternating current to feed the inductor. Usually, resonant converters are used to achieve higher efficiencies and power densities. As a consequence, in these converters, the efficiency is also reduced in the low-medium output power range. This project presents the use of the half-bridge inverter in two operating modes to achieve higher efficiency in a wide output power range.