ZVSOperation of LLC Resonant Inverter with Phase Limit Control for Induction furnace

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Publication Details

Author list: Piyasak Kranprakon;Anawach Sangswang;Sumate Naetiladdanon

Publication year: 2019

Volume number: 13

Issue number: 1

Start page: 29

End page: 36

eISSN: 2286-9131

URL: https://www.tci-thaijo.org/index.php/ecticit/article/view/64856

Abstract

This paper presents an LLC resonant inverter with phase limit control to guarantee zero voltage switching (ZVS) operation and protect switching devices from spike current during the heating process. The output power is controlled by using the asymmetrical duty cycle (ADC) modulation. With phase limit control, the non-ZVS operation and spike current caused by a change of duty cycle with fixed frequency and load Curie’s temperature can be eliminated. The proposed method is confirmed through computer simulation and hardware experiment. The experimental results are provided with the heating of a 300 g of Tin from room temperature until melting at 232 ˚C.

Keywords

Phase limit