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Induction heating (IH) technology has gained attention of the heating appliance market due its several advantages over conventional heating technologies. Traditional IH solutions comprise of separate rectification and high frequency inversion stages. Efficiency of the IH system reduces due to more conversion stages. This paper proposes a single-stage ac-ac inverter with boosting stage. Rectification, voltage boosting and power control are done using three MOSFETs which reduces the component count. Duty cycle control is used for controlling IH load power. Provision of independent voltage boosting in positive and negative half cycle of the supply mains helps in maintaining good input current profile with simple control. The proposed ac-ac inverter offers a compact, efficient and cost-effective inverter configuration for IH applications. The operation of the proposed inverter is verified using MATLAB/Simulink software.
Salvi et al. (2024) studied this question.