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Variable frequency control of the resonant half bridge dual converter

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Open access
Authors
Li, Q.
Wolfs, Peter
Date
2003
Type
Conference Paper

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Citation
Li, Quan and Wolfs, Peter. 2003. Variable frequency control of the resonant half bridge dual converter, in Duke, R. (ed), Australasian Universities Power Engineering Conference AUPEC 2003, pp. Paper 17-17. Christchurch, New Zealand: University of Canterbury NZ.
Source Title
Australasian Universities Power Engineering Conference
Source Conference
Australasian Universities Power Engineering Conference AUPEC 2003
ISBN
Faculty
Department of Electrical and Computer Engineering
School of Engineering
Faculty of Science and Engineering
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Abstract

The resonant half bridge dual converter has been previously developed for the DC-DC conversion application in a two-stage photovoltaic Module Integrated Converter (MIC). In order to apply Maximum Power Point Tracking (MPPT) for the PV module or provide variable output voltage, the DC-DC converter is required to operate with variable input/output voltage ratios. This paper studies the variable frequency control of the resonant half bridge dual converter, which is able to produce an output voltage range of 1:2.3 while maintaining resonant switching transitions. The design method of the converter is analysed in detail and the explicit control functions for a 200 W converter are established. Both of the theoretical and simulation waveforms are provided. A resonant half bridge dual converter with the voltage clamp is also proposed at the end of this paper.