Abstract

The behavior of a three-port bidirectional DC-DC converter (TPC) under soft-switching mode applied to hybrid electric systems is analyzed in this paper. The principle of power flow control and the operation under soft-switching mode have been studied to establish the converter operation regions. The parameters considered are the transformer turns ratio and the leakage inductances, which establish the maximum power that can be transferred. As a result, design considerations to operate the TPC under soft-switching mode within a wide operation range, by using the conventional modulation strategy, are presented. Experimental results are included to validate the proposal.

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