Zvs-operation of LLC resonant inverter with phase limit control for induction furnace
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Publication Details
Author list: Kranprakon P., Sangswang A., Naetiladdanon S.
Publisher: Electrical Engineering/Electronics, Computer, Communications and Information Technology Association
Publication year: 2019
Journal: ECTI Transactions on Computer and Information Technology (2286-9131)
Volume number: 13
Issue number: 1
Start page: 1
End page: 8
Number of pages: 8
ISSN: 2286-9131
Languages: English-Great Britain (EN-GB)
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. © 2019, ECTI Association Sirindhon International Institute of Technology. All rights reserved.
Keywords
asymmetrical duty cycle, induction furnace, Phase limit
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