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Comparison of Inductor-Half-Bridge and Class-E resonant topologies for piezoelectric transformer applications

: Yang, Y.; Bisogno, F.E.; Schittler, A.; Nittayarumphong, S.; Radecker, M.; Fischer, W.-J.; Fahlenkamp, M.


Institute of Electrical and Electronics Engineers -IEEE-:
IEEE Energy Conversion Congress and Exposition, ECCE 2009 : San Jose, California, USA, 20 - 24 September 2009
Piscataway/NJ: IEEE, 2009
ISBN: 978-1-4244-2892-2
ISBN: 978-1-4244-2893-9
Energy Conversion Congress and Exposition (ECCE) <2009, San Jose/Calif.>
Conference Paper
Fraunhofer IZM ()
convertors; light emitting diodes; piezoelectric devices; transformers; inductor-half-bridge; offline LED design

A comparison of inductor-half-bridge (IHB) and class-e (CLE) resonant converters using piezoelectric transformer (PT) is presented in this paper. The analysis approach is based on state space normalized solutions which allows precise analyzing and comparing the two topologies for different applications with mathematics software. The obtained mathematic results can be directly used to design and to optimize the converter parameters to meet the requirements of specific applications. Two demonstration boards for an offline 2 Watts LED application have been implemented with IHB and CLE resonant converters separately. The experiment results are in a good agreement with the theoretical calculations and conclusions.