LTCF变压器设计与仿真分析  

Design and simulation of transformers based on low temperature cofired ferrite(LTCF)

作　　者：赵勇[1] 张卫[1] 

机构地区：[1]西南应用磁学研究所,四川绵阳621000

出　　处：《磁性材料及器件》2013年第5期37-40,44,共5页Journal of Magnetic Materials and Devices

基　　金：中国电子科技集团公司技术创新基金资助项目(JJ11123)

摘　　要：首先提出了LTCF变压器的通用模型和有效参数计算方法,与3D有限元电磁场仿真结果比较偏差小于5%。分析了介质材料对于构建磁路的作用,通过对绕组结构的研究,发现PSP绕组结构具有最佳性能。研究了气隙的实现方法及对变压器的影响,指出采用印刷介质材料方式实现气隙的LTCF变压器具有耦合系数低的天生设计缺陷。最后通过参数扫描法研究了各种参量对变压器耦合特性的影响,发现介质厚度、初次级间距、盖帽厚度、边距及基片与介质磁导率之比是影响耦合系数的主要因素。First, the general model of LTCF transformer and the method for calculating its effective parameters are proposed, and the deviation of effective parameters is less than 5% compared to results of 3D electromagnetic finite element simulation. Then, effects of dielectric materials on the magnetic circuit are analyzed, and study of winding structures indicates that PSP structure shows the best performances. The realization of air-gap and its influences on LTCF transformer are discussed, and it is pointed out that LTCF transformer whose air-gap is realized by printing dielectric films has an inherent design flaw of low coupling coefficient. Finally, influences of various parameters on the coupling coefficient of transformer are studied by means of scanning parameters, and it shows that thickness of dielectric material, gap between primary and secondary windings, cover thickness, edge distance, and permeability ratio of substrate and dielectric materials, etc have important influences on the coupling coefficient.

关 键 词：低温共烧铁氧体(LTCF) 变压器 耦合系数 气隙 仿真 

分 类 号：TM4[电气工程—电器]