Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1996-09-06
1998-05-19
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 17, H02M 322
Patent
active
057544131
ABSTRACT:
A voltage stress (e.g., reverse voltage stress) in rectifying diodes of, for instance, an asymmetrical DC-to-DC converter is reduced by using a transformer circuit having multiple power transformers with a composite static transfer characteristic. More specifically, the static transfer characteristic is selected to be monotonic in combination with the transformer circuit including two transformers, having independent isolated cores, coupling an input to output of the converter. A primary to secondary winding ratio of each of the two transformers is selected in such a way as to achieve a reduction in reverse voltage in at least one of the rectifying diodes. The reduction in the reverse voltage and, hence, improved efficiency of the rectifier is directly translatable into an increase in a power density of the converter.
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INTELEC '93 Record, 1993, vol. 1, pp. 341-349.
Fraidlin Simon
Meleshin Valery I.
Miftakhutdinov Rais K.
Nemchinov Alexey V.
Jardieu Derek J.
Lucent Technologies - Inc.
Wong Peter S.
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