2011全国大赛A题开关电源模块并联供电系统.pdf

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1、开关电源模块并联供电系统2011----A题指导老师：时斌孙其昌队员：08级张林08级宋杰09级汲建玲学校：南京师范大学学院：中北学院1摘要：本文介绍了直流均流源的原理，设计思路及方法，整个系统以MSP430单片机为控制器，控制均流，采用开关电源芯片LM2576为电源芯片。通过独立键盘控制电源电压的输出，其操作方便简单。两路电源能够在外接负载变化的情况下自动均流，整个系统具有电路简单，输出电压范围大，精度高，稳定可靠的特点，并具有过流保护及自动恢复功能，很好的达到了题目的各项要求。关键词：均流源MSP430LM2576自动均流Abstract:ADCcurre

2、ntsourcewasintroducedinthispaper.InthisarticleweintroduceatheoryofaDCcurrentsourceandhowtodesign.ThesystemismadeupofMSP430whichplayaroleofmicrocontroller,andLM2576asPowerchip.thesystemisperfectinlargeoutputvoltagerange,highprecision,highstabilityandincurrent-limintingandauto-resume.

3、Keywords:currentsourceMSP430LM2576AutomaticCurrent2目录摘要................................................................................................................................2一，题目要求.............................................................................................

4、...................4二，方案论证与比较....................................................................................................5（一）总体方案论证.............................................................................................51.主从法.............................................

5、.............................................................52.平均电流自动均流法..................................................................................53.热应力自动均流法......................................................................................64.最大电流均流法.....................

6、.....................................................................6（二）模块的选择.................................................................................................61．单片机模块................................................................................................62，开

7、关电源模块............................................................................................7三，系统设计................................................................................................................9（一）总体设计思路.........................................................

8、...................