Quad-Active-Bridge Converter With Current Balancing Coupled Inductor for SST Application
IEEE Transactions on Power Electronics(2021)
摘要
In this article, a current balancing coupled inductor (CBCL) based asymmetrically configured quad-active-bridge (QAB) converter is proposed. The QAB converter provides high-frequency isolation for a dc-dc stage of a solid state transformer (SST), as well as provides a modular solution to the SST medium-voltage (MV) dc link. The proposed CBCL ensures current balancing among/three active H-bridges without using any dedicated controller and without expensive sensors when transferring equal power from MV to low-voltage side. The proposed CBCL is the integration of three inductors of the active H-bridges required for power transfer and zero-voltage-switching and does not require an extra magnetic volume. Experimental results are presented to validate the performance.
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关键词
CBCL,current balance,current balancing coupled inductor (CBCL),imbalanced current,QAB converter,quad-active-bridge (QAB),solid-state-transformer (SST)
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