论平面变压器在开关电源中的技术优势

高功率密度是当今开关电源发展的主要趋势,要做到这一点,一个重要的技术就是提高电源中磁元件的功率密度。平面变压器因为特殊的平面结构和绕组的紧密耦合,使得高频寄生参数得到了很大的降低,极大地改进了开关电源的工作表现,因此在近些年得到了广泛的应用。本文研究了几种不同的平面结构和绕组制作的方式,并且谈到了设计平面变压器的一个标准方法,这将使得设计过程变得更加简单,而且可以大大降低设计成本。最后实际比较了平面变压器和传统变压器的一些参数,并给出了设计方针。

Technique Advantageous of Planar Transformer in Switch Power Supply

High power density is the majoy trend of the development of switch power supply at present,so improving power density of magnetic components in power suply is a important technique.Planar transfomer can reduce the high-frequency parasitic parameters highly and improve the perfomance of swith power supply because it has special planar structure and close coupling of winding.We re- search on kinds of diffrent way of planar structure and winding fabrication in this paper and touch on a standard method on designing planar transformer.This method can simplify the design process and reduceits cost.At last,we compare some parameters between pla- nar transformer and traditional transfomer,and give design program.