ZVS-Operation of LLC Resonant Inverter with Phase Limit Control for Induction furnace

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Published: Apr 5, 2019
DOI: https://doi.org/10.37936/ecti-cit.2019131.64856
Keywords:
LLC Resonant Inverter, Induction Furnace, Asymmetrical Duty Cycle, Phase Limit

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Piyasak Kranprakon
Department of Electrical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Thailand
Anawach Sangswang
Department of Electrical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Thailand
Sumate Naetiladdanon
Department of Electrical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Thailand

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.

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How to Cite
[1]
P. Kranprakon, A. Sangswang, and S. Naetiladdanon, “ZVS-Operation of LLC Resonant Inverter with Phase Limit Control for Induction furnace”, ECTI-CIT Transactions, vol. 13, no. 1, pp. 29–36, Apr. 2019.
Issue
Vol. 13 No. 1 (2019): ECTI Transaction on CIT (May 2019)
Section
Review Article

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