一种线性稳压电源的改进设计  

Improved Design of a Linear Stabilized Power Supply

作　　者：闫庆丰 YAN Qing-feng(Shanxi Technology and Business College,Taiyuan 030032,Shanxi)

机构地区：[1]山西工商学院计算机信息工程学院,山西太原030032

出　　处：《电脑与电信》2023年第3期42-48,共7页Computer & Telecommunication

基　　金：山西省1331工程立德树人好老师课程建设计划支持人选项目,项目编号:201932;山西工商学院重点建设科研团队建设计划;山西省教育科学“十四五”规划2022年度一般规划课题,项目编号:GH-220436。

摘　　要：线性稳压电源的高工作效率与低纹波是其所具备的优点之一。通过对比分析提出一种采用分立元件设计线性稳压电源的改进方案。该方案选定工频变压器实现对220V的交流电变压,选用桥式整流电路和电容滤波电路实现电路的整流和滤波。在稳压电路中取样电路通过取样电阻实现取样;基准电压通过TL431与分压电阻分压提供;误差放大电路采用LM358双运算放大器放大并采用两个功率管进行电压的调整。通过最终电路的仿真和硬件的反复调试,实现了220v输入电压向0~20V输出电压的连续可调变压,且电流能够稳定在1A输出,电路所测纹波、压差电压等均符合预期指标。The high efficiency and low ripple of linear stabilized power supply is one of its advantages.Through comparative analy-sis,this paper puts forward an improved scheme of using discrete components to design linear stabilized power supply.In this scheme,the power frequency transformer is selected to realize the AC voltage conversion of 220V,and the bridge rectifier circuit and capacitor filter circuit are selected to realize the rectification and filtering of the circuit.In the voltage stabilizing circuit,the sam-pling circuit samples through the sampling resistance;the reference voltage is provided by the TL431 and the voltage divider;the er-ror amplification circuit is amplified by the LM358 dual operational amplifier and the voltage is adjusted by two power tubes.Through the simulation of the final circuit and repeated debugging of the hardware,the continuous adjustable voltage from 220v in-put voltage to 0~20V output voltage is realized,and the current is stable at 1A output,and the ripple and differential voltage mea-sured by the circuit are in line with the expected specifications.

关 键 词：线性稳压电源 分立元件 连续可调 低纹波 

分 类 号：TM41[电气工程—电器] TM44