A Novel High Insulation 100 kW Medium Frequency Transformer

作者：Zhicheng Guo, Sanjay Rajendran, Jagadeesh Tangudu, Yasmin Khakpour, Stephen Taylor, Lei Xing, Yue Xu, Xianyong Feng, Alex Q. Huang · 发表于：IEEE Transactions on Power Electronics · 年份：2022 · DOI：10.1109/tpel.2022.3205646 · 被引用次数：40 · 研究领域：Advanced DC-DC Converters、Silicon Carbide Semiconductor Technologies、Induction Heating and Inverter Technology

High voltage insulation and thermal management are the two major challenges in a high-power medium frequency transformer (MFT) design. This letter proposes novel insulation and cooling structure with potted windings in a 100 kW MFT with two FINEMET FT-3TL magnetic cores and parallel-concentric winding structure. For the first time, a three-dimensional printed bobbin with heatsink fins is demonstrated. The 100 kW MFT achieves a power density of 10.6 kW/L and a partial discharge inception voltage of 20 kV peak. The MFT is applied in a dual active bridge based medium voltage solid state transformer, achieving a peak efficiency of 98.2% at 40 kW and 97.5% at 100 kW. The MFT itself has a 99.735% efficiency with superior thermal performance at 100 kW output power.