基于铁镍磁组合电感的Boost变换器效率的提升

Efficiency Improvement of Boost Converter Based on Ferronickel Magnetic Combined Inductor

阐述Boost变换器的控制方法,分析磁组合电感的优缺点和磁路,对铁镍磁组合电感、铁硅磁组合电感的磁损、铜损进行了数学建模。以建模为基础分别计算了输入电压、开关频率以及输出功率对电感损耗的影响,计算结果表明铁镍磁组合电感比铁硅磁组合电感的磁损小30%。两种电感搭建Boost平台在各种工况下使用功率分析仪对整机效率进行分析,从实验结果看出,使用铁镍磁组合电感的Boost变换器在所有功率段内都比使用铁硅磁组合电感的Boost电路效率高。

The control method of Boost converter is described,the advantages and disadvantages of magnetic combined inductor and magnetic circuit are analyzed,and the mathematical modeling of magnetic loss and copper loss of Fe-Ni combined inductor,Fe-Si combined inductor is carried out.Based on the modeling,the influences of input voltage,switching frequency and output power on inductance loss are calculated respectively.The results show that the magnetic loss of Fe-Ni magnetic combined inductor is 30%less than that of Fe-Si magnetic combined inductor.In various working conditions,power analyzer is used to analyze the efficiency of the whole machine.From the experimental results,it can be seen that the Boost converter using Fe-Ni magnetic combined inductor has higher efficiency than the Boost circuit using Fe-Si magnetic combined inductor in all power segments.