具有隔离功能的四有源桥单级双向三相AC-DC变换器：介绍与优化调制

This paper introduces the quad-active-bridge (QAB) ac-dc converter, which provides isolation and bidirectional power flow in a single-stage topology. While matrix-based topologies commonly use bipolar voltage switches, the proposed solution allows the use of unipolar voltage switches. Compared to a six-switch inverter, the average voltage stress is reduced by a factor of 2. A modulation scheme is ...