高频开关变换器中的磁元件(Ⅰ)——高频磁芯材料、特性和参数

Magnetic Components in High Frequency Switching Converters(Ⅰ)—High Frequency Core Materials,Characteristics & Paramneters

磁元件是开关电源的关键元件之一。高频磁元件的主要问题有:分布参数、损耗、发热等,并对磁芯的材料和结构形式提出较高要求。文中着重介绍高频磁元件的基础理论和基本概念。本期介绍磁芯的材料、特性和参数,下一期介绍电感和变压器。

Magnetic component is the one of important components in switching mode power supplies. The main problems of the high frequency magnetic components include parasitic parameters, core & winding losses, heat dissipating, requiring high performance magnetic materials and resonable core geometries. The basic principles and theories of high frequency magnetic components are introduced. Core materials, characteristics & paramneters in this issue are introduced; inductors and transformers in next issue will be introduced.