A Dual Half‐Bridge Boost Resonant Inverter for Multiload Induction Heating System

ABSTRACT Induction heating (IH) has gained significant attention for its efficiency and performance in heating materials without direct contact. This paper presents the design and experimental evaluation of a novel resonant inverter capable of powering both ferromagnetic (FM) and nonferromagnetic (NFM) loads efficiently using dual half‐bridge (DHB) architecture with only three MOSFET switching devices for induction cooking (IC) systems. The inverter operates with dual frequency: a low frequency for FM load and a high frequency for NFM load. The power in FM load is controlled using pulse frequency modulation (PFM), and NFM load is controlled using either PFM or asymmetrical duty cycle (ADC) control, independently and simultaneously. Additionally, the inverter incorporates boost operation to enhance voltage regulation and ensure robust performance under load power varying conditions. The inverter is designed to operate with zero voltage switching (ZVS), minimizing switching losses and improving overall efficiency. An experimental prototype has been developed to deliver a total output power of 660 W, demonstrating the feasibility and effectiveness of the resonant inverter for practical applications.