Improved modulation strategy for a LLC-type resonant converter in a solar application
Conference: PCIM Europe 2014 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/20/2014 - 05/22/2014 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2014
Pages: 8Language: englishTyp: PDFPersonal VDE Members are entitled to a 10% discount on this title
Deck, Patrick; Dick, Christian Peter (Cologne University of Applied Sciences, Germany)
This paper presents the implementation of an improved modulation strategy for a LLC-type resonant converter in a solar application. The modulation is neither the frequency modulation nor the phase-shift modulation, but a new hybrid modulation technique also depending on a current zero-crossing in the resonant tank. Using only one control parameter, a significantly increased input-to-output voltage ratio can be controlled without losing soft switching. A complex state machine is presented including safety features. Experimental results demonstrate the functionality.