Microcontroller based phase control circuit for resonant power converters

Milcevski, Dejan and Stefanov, Goce and Karadzinov, Ljupco (2011) Microcontroller based phase control circuit for resonant power converters. In: Proceedings of the 16-th International Symposium on Power Electronics—Ee 2011, 26-28 Oct 2011, Novi Sad, Srbia.

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Abstract

A microcontroller based circuit is developed for driving the IGBT switches of a bridge resonant power converter used for induction heating of metals. When a resonant power converter is used for induction heating the load is variable due to the effects of the heating process making the converter to operate out of resonance. This effect decreases the converter output power and increases switching loses. In order to maintain constant output power operating constantly on the resonant frequency a microcontroller program and circuit are developed. The control circuit corrects the operating frequency according to the load changes measuring the output voltage to current phase difference, hence keeping the converter at resonance. The presented circuit is tested with simulations and its operation is confirmed practically with a prototype board.

Item Type: Conference or Workshop Item (Paper)
Subjects: Engineering and Technology > Electrical engineering, electronic engineering, information engineering
Divisions: Faculty of Electrical Engineering
Depositing User: Goce Stefanov
Date Deposited: 24 Dec 2012 10:50
Last Modified: 04 Oct 2013 11:22
URI: http://eprints.ugd.edu.mk/id/eprint/4249

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