Design Optimization of Multi-Winding High-Frequency Magnetic Links for Multi-Port Power Converters Used in Grid Integration Systems

Multi-winding high-frequency magnetic link (MWHFML)-based dc-dc converter topologies are a novel way to connect multiple power systems and provide higher power densities through reduced core material and fewer power converter stages. This is because an MWHFML can link multiple ports, and even if one port stops working, it can be segregated, but the other ports can continue to work, leading to opportunities for fault tolerance. However, MWHFML can introduce other technical challenges for dc-dc converters, especially when resonant topologies are used due to port-to-port cross-coupling effects. This article presents the design and optimization of a 600 V, 5 kW, 10 kHz MWHFML with a wide range of core-winding configurations. The amorphous AMCC016B U-U shape core has been selected for the main core geometry. This paper proposes an optimized new core-winding geometry to minimize the effect of voltage magnitude and phase angle variations at the multiple inputs of the MWHFML.