基于SPICE模型的Buck变换器磁芯损耗仿真分析与实验验证  

Simulation analysis and experimental verification of core losses of buck converters based on SPICE model

作　　者：张宇飞 田家良 佟光辉 周岩 ZHANG Yu-fei;TIAN Jia-liang;TONG Guang-hui;ZHOU Yan(School of Automation,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学自动化学院

出　　处：《磁性材料及器件》2020年第1期36-40,共5页Journal of Magnetic Materials and Devices

基　　金：国家自然科学基金资助项目(51307088)

摘　　要：以Buck变换器为对象,提出了一种基于SPICE仿真策略模拟开关变换器铁氧体的磁芯功率损耗。该方法基于磁芯功率损耗构成分离模型,使用一组正弦激励下的损耗数据作为仿真基准,通过三个模拟行为构建模块体现占空比对磁滞损耗和涡流损耗的影响。该仿真算法可直观地给出Buck变换器磁损随占空比的变化,同时也给出了磁滞损耗分量、涡流损耗分量和磁通密度等关键变量的变化特征。实验表明所提出的磁损仿真结果与实验结果取得了较好的一致性。Taking the Buck converter as an example,a simulation method was proposed for ferrite core losses in switched mode power converters based on the SPICE model.Based on loss components model,the effects of duty cycles on hysteresis losses and eddy current losses are reflected by using three analog behavioral building blocks(ABM).The simulation method can intuitively give the changing tendency of magnetic losses when duty cycles change,and the variation characteristics of key variables,such as hysteresis and eddy current loss and magnetic flux density,are displayed directly.Simulation results show that the proposed method is in good agreement with the experimental results.

关 键 词：BUCK变换器 磁芯损耗 SPICE模型 仿真 实验 

分 类 号：TM46[电气工程—电器]