Optimal design of a magnetically coupled filter for high efficiency, low cost and low volume dc-dc battery storage converter
Résumé
The paper presents the optimal design of a magnetically
coupled filter for a 500 kVA dc/dc converter. The
converter is used for batteries storage applications in UPS
systems. The high efficiency and low cost ;14% of converter
total price saving; are obtained by using a magnetically coupled
filter rather than classical chokes. The design of the filter is
achieved using a multi-objective optimization algorithm. Several
solutions are compared, including interleaved chokes, coupled
monolithic interleg-transformer and coupled separated interlegtransformers.
Two prototypes were built. Tests and validations
were performed in an industrial environment.