通过设计变压器改善反激变换器的交叉调整率

鉴于变压器性能对多路输出反激变换器的交叉调整率有重要影响,为变换器的关键器件之一,提出了基于有限元数值仿真的任意多路输出变压器的建模方法.基于此模型,结合电路仿真软件研究了变压器分布参数及线圈结构对反激变换器交叉调整率的影响.在此基础上,给出变压器的设计指导原则.实验证明,提出的任意多路输出变压器建模方法不仅使用方便,而且所建模型有足够高的精度;所设计的指导原则可有效提高多路输出变换器的交叉调整率.

Analysis and Design of Transformer for Improving Cross Regulation in Flyback Converter

Transformer is a key component to improve cross regulation of multiple-output flyback converter. Based on finite element simulation, the modeling method considering parasitic parameters was proposed for the transformer with any windings. By the new model and circuit simulation, the parasitic parameters and winding layouts were researched for improving the cross regulation. And the design guidelines were given. Experiments verified the modeling method and the design guidelines.