编号
本科生毕业设计（论文模块化电源）
   
题目：  多路直流电源并联供电      
                                 
物联网工程 学院电气工程及其自动化 专业
学    号       **********  
学生姓名         陈明        
指导教师     方益民  副教授  
                     
二〇一二年六月
摘要
开关电源模块供电系统由并联稳压电源和检测控制系统组成．该系统主要由AVR高档单片机ATmega8[1，2]控制，主回路由两个Buck斩波电路将24V转换为两个8V电源并联输出．测控电路由电阻分压实现电压检测，电流通过取样电阻，然后经过差分放大器AD8205送给单片机，单片机产生PWM[3]信号控制IR2103来实现MOS管的通断，已形成闭环反馈电路保证输出电压的稳定和电流按规定比例分配，并使系统效率达到75%以上．本系统具有系统效率高、精度高、稳压、输出文波小、负载短路保护及自动恢复功能，自身抗干扰性强、调整速度快等优点．
关键词：单片机；  开关电源；  PWM控制 ；  BUCK斩波;

Abstract
Switching power supply module power supply system was composed of Shunt regulated power supply and control system testing. The system is mainly consists  of a new AVR high-grade MCU ATmega8 control, the main return route two Buck chopper circuit to convert the 24V to two 8V power output. Measurement and control circuit is composed of a resistor divider voltage detection, current flows through the sampling resistor, and then through the differential amplifier AD8205for single-chip generated PWM signal to control the IR2103to realize the MOS pipe on-off, has formed a closed loop feedback circuit to guarantee the stability of the output voltage and current at the prescribed proportion allocation, and make the system efficiency can reach above 75%. This system has the advantages of small volume, light weight, high conversion efficiency. Its strong anti-interference, wide voltage range, adjusting speed, high accuracy, high system efficiency, voltage and current stabilizing, small output ripple, load short-circuit protection and automatic restoration of function etc..

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