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An isolated bidirectional half-bridge active-clamp current-fed push-pull DC/DC converter for DC microgrid applications

 
: Schulz, M.; Ditze, S.; Diller, M.; Han, Y.; März, M.

:

Institute of Electrical and Electronics Engineers -IEEE-:
21st European Conference on Power Electronics and Applications, EPE 2019 ECCE Europe : 3-5 September 2019, Genova, Italy
Piscataway, NJ: IEEE, 2019
ISBN: 978-9-0758-1531-3
ISBN: 978-9-0758-1530-6
ISBN: 978-1-7281-2361-5
pp.1-10
European Conference on Power Electronics and Applications (EPE) <21, 2019, Genova>
English
Conference Paper
Fraunhofer IISB ()

Abstract
This paper describes an isolated bidirectional half-bridge active-clamp current-fed push-pull DC/DC converter developed for a DC microgrid. A novel modulation scheme is introduced for step-down operation, which decreases the switching losses mainly on the higher voltage side of the converter. Also, the effect on step-up operation mode is analyzed in detail. A prototype of the converter is built with a nominal output power of 600 W exhibiting a peak efficiency of 96.8% in step-down operation. Measurements show a good agreement with the simulated key waveforms. The topology has also a highly efficient step-up operation mode with a peak efficiency of 96.2%.

: http://publica.fraunhofer.de/documents/N-629345.html