유도 가열 시스템의 낮은 저항을 가진 용기에 대한 가열 성능 향상을 위한 3 고조파 변조 기법

Abstract

Induction Heating (IH) systems are widely used in industry applications and home appliances due to the advantages of high effeciency, fast heat, and high safety compared with other heating methods. However, a disadvantage of the IH system is the limited heating range of a pot. The low resistance pot induces large current, so it is impossible to transfer power to the pot for proper heating due to the maximum current rating of the power switch. In order to solve this problem, the Third Harmonic Modulation (THM) has been previously proposed, but it shows limited heating performance because of the high possibility of ZVS failure caused by the influence of the first harmonic component. In this paper, a novel THM employing a Phase Shift Modulation (PSM) is proposed to improve the IH performance by reducing the influence of the first harmonic component and by expanding the ZVS range of the power switch.