摘要
现有的LTCF叠层变压器设计方法主要针对反激电源结构,且缺乏系统的设计流程。尝试将LTCF工艺引入LLC谐振变换器的变压器设计中,采用微磁叠层铁氧体基片作为磁导材料,探讨了一种新的LTCF变压器设计方法。该方法基于三明治结构的变压器绕组,将LLC谐振变换器中串联和并联的电感与变压器在非理想条件下的漏感以及励磁电感相结合,有效改善初次级线圈的耦合系数,并减少漏磁,实现器件数量的有效精简。同时,分析了线圈中心半径r、绕组宽度ww和绕组间距wg对变压器性能的影响。结果表明,该变压器在500 kHz至1 MHz频率范围内的耦合系数k可达0.847至0.986,验证了设计方法的有效性和准确性。此变压器可应用于小型电源模块电路中,以改善器件性能并缩小器件尺寸。
The current implementations of LTCF laminated transformers are predominantly concentrated on the flyback power configurations without a systematic design framework.This paper integrates the LTCF process into the transformer design of LLC resonant converters,using micro-magnetic laminated ferrite substrates as magnetic materials to explore a novel LTCF transformer design approach.The proposed method was based on a sandwich structure for the transformer windings,in which the series and parallel inductances present in the LLC resonant converter were synthesized with the magnetizing inductance and leakage inductance of the transformer in practical operating scenarios.With this integration,the coupling coefficient of the primary-secondary coils was effectively enhanced,the leakage flux was reduced,and significant reduction in the number of components was realized.Additionally,the influence of design parameters,including coil center radius r,winding width ww,and winding spacing wg,on transformer performance was analyzed.The results demonstrate that a coupling coefficient k ranging from 0.847 to 0.986 within the frequency range from 500 kHz to 1 MHz is achieved,thereby validating the effectiveness and accuracy of the proposed design methodology.The prototype demonstrates promising applicability in high density power electronic modules,leading to the performance enhancement and miniaturization of the systems.
作者
金怿伟
邢孟江
杨圆圆
李小珍
JIN Yiwei;XING Mengjiang;YANG Yuanyuan;LI Xiaozhen(School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China;Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 310031,Zhejiang Province,China;Fujian Key Laboratory of the Modern Communication and Beidou Positioning Technology in Universities,Quanzhou University of Information Engineering,Quanzhou 362000,Fujian Province,China)
出处
《电子元件与材料》
北大核心
2025年第5期549-555,共7页
Electronic Components And Materials
基金
福建省自然科学基金(2023J011802)
福建省自然科学基金(2023J05301)。
