Case Study: Loss Analysis in a HF-Multiport Transformer

Abstract Transformers inherently experiment with losses from conductor resistance (Joule heating), magnetic hysteresis, and eddy currents regardless of operating frequency. While high-frequency operation mitigates the influence of eddy currents and accelerates magnetic hysteresis, reducing core losses, this study delves into the intricate interplay of these factors in a three-port transformer. This paper examines two primary configurations: a dual-charging, single-power port arrangement and a dual-input, single-output topology. Through rigorous 3-D finite element analysis, the research dissects hysteresis losses and operational characteristics for each configuration. Furthermore, the investigation extends to the impact of diverse transformer topologies, such as the triple active bridge (TAB), on the physical and electrical attributes of power electronic transformers (PETs). These findings hold significant implications for the optimisation of transformer design and the advancement of power electronics systems.