基于L4981A的直流升压变换器的设计与实现

Design and Implementation of DC Boost Converter Based on L4981A

中文关键词:  直流升压变换器  开关电源  PWM  L4981A

英文关键词:DC boost converter  switching power supply  PWM  L4981A

中文摘要:

      提出了一种用于轨道列车直流升压变换器实现的解决方案。变换器的设计充分利用了具有高功率因数PWM控制芯片L4981A的Boost功率校正电路结构，实现了稳定的直流升压功能。首先分析了其工作原理，其次描述了电路设计中的相关参数计算和选取，最后给出了直流升压变换器电路的实验结果分析。本电路控制电路简单、元器件少、成本低，具有一定的实际应用价值。

英文摘要:

      A solution for DC boost converter applied to subway or train is proposed.Using of the power correction circuit based on the high power factor PWM control chip L4981A,the function of DC converter to boost up high DC output is realized steadily and flexibly.The circuit principle is analyzed firstly,and then how to select the parameters about design is introduced.Finally,the analysis of experimental results of the circuit is given.The approach of design has many advantages,including simplified control,fewer semiconductor components,and low price.It is especially suitable to low cost and high power applications.