Hexagonal-Shaped High-Frequency Transformer With Built-In Leakage Inductance and System Integration of Silicon Carbide MOSFETs

IF 1.6 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Magnetics Letters Pub Date : 2025-01-01 Epub Date: 2025-12-03 DOI:10.1109/LMAG.2025.3640014

Nafis Subhani;Weichong Yao;Foad Taghizadeh;Junwei Lu;Yong Zhu

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Abstract

This letter presents a novel high-frequency transformer (HFT) structure with built-in leakage inductance and integrated power electronics circuits for isolated dc–dc converters. The developed hexagonal-shaped HFT is constructed using multiple U26/22/16 ferrite cores and is designed to operate at high switching frequencies. Unlike conventional designs, both the primary and secondary windings are wound around the central limbs, enabling precise control of leakage inductance and eliminating the need for bulky auxiliary inductors in dc–dc dual active bridge converters. In addition, the design integrates SiC mosfets, gate drivers, and a heat sink directly within the magnetic assembly, thereby reducing packaging volume and achieving a more compact converter structure. The electromagnetic characteristics of the HFT are analyzed using 3-D finite-element simulations in COMSOL, with results showing close agreement with design predictions. A prototype has been fabricated and experimentally validated, confirming the feasibility and effectiveness of the approach for high-power converter applications.

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内置漏感的六角形高频变压器及碳化硅mosfet的系统集成

本文介绍了一种新型高频变压器（HFT）结构，它具有内置漏感和集成的电力电子电路，用于隔离dc-dc变换器。开发的六角形HFT由多个U26/22/16铁氧体铁芯构成，设计用于高开关频率。与传统设计不同，初级和次级绕组都绕在中心分支上，从而能够精确控制漏感，并消除了dc-dc双有源桥式转换器中笨重的辅助电感的需要。此外，该设计将SiC mosfet、栅极驱动器和散热器直接集成在磁性组件中，从而减少封装体积，实现更紧凑的转换器结构。利用COMSOL中的三维有限元模拟分析了高频高频的电磁特性，结果与设计预测非常吻合。制作了样机并进行了实验验证，验证了该方法在大功率变换器应用中的可行性和有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.