基于单片机和CPLD的单相交流相控调压系统设计.doc
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基于单片机和CPLD的单相交流相控调压系统设计.doc
信息与控制工程学院专业综合设计说明书-I-专业综合设计说明书基于单片机和CPLD的单相交流相控调压系统设计学生学号:学生姓名:专业班级:指导教师:职称:起止日期:2011.08.292011.09.18基于单片机和CPLD的单相交流相控调压系统设计-II-专业综合设计任务书一、设计题目:基于单片机和CPLD的单相交流相控调压系统设计二、设计目的:1.理解单相交流相控调压基本原理;2.掌握随机型固态继电器SSR模块、复杂可编程器件CPLD和MSP430单片机使用方法;3.理解过零鉴相信号的获取和触发信号产生原理,掌握CPLD器件的VHDL语言程序编程方法。4.掌握调压程序和系统监控程序设计方法和C430编程方法。三、设计任务及要求1.设计单相交流相控调压系统硬件电路;2.设计调压系统CPLD触发信号发生程序;3.设计调压系统单片机监控程序;4.制作单相交流相控调压系统,实现交流25V-220V调压,撰写设计说明书。四、设计时间及进度安排设计时间共三周,具体安排如下表:周次设计内容设计时间第一周学习复杂可编程器件CPLD和MSP430单片机使用方法,查找相关资料。设计基于单片机和CPLD的单相交流相控调压系统电路图。2011.8.29-2011.9.4第二周设计CPLD和MSP430单片机程序和焊装基于单片机和CPLD的单相交流相控调压系统。2011.9.5-2011.9.11第三周完成单相交流相控调压系统调试,编写设计说明书。提交作品及设计说明书,评定专业综合设计成绩。2011.9.12-2011.9.18五、指导教师评语及学生成绩指导教师评语:2011年9月18日绩指导教师(签字):信息与控制工程学院专业综合设计说明书-III-目录专业综合设计任务书····································································································II第1章结论及总体框图设计························································································11.1选题背景········································································································11.2课题的设计目的······························································································11.3相控调压基本原理及功能框图设计······································································11.3.1基本原理·································································································11.3.2开关元件的选用························································································31.3.3相控式单相交流调压系统框图·····································································4第2章硬件电路设计·································································································52.1系统结构概述·································································································52.2MSP430系列单片机简介···················································································62.2.1MSP430系列单片机的特点·······································································62.2.2MSP430F169引脚功能·············································································62.3LCM12864液晶显示器·····················································································72.3.1LCM12864液晶显示模块简介····································································73.3.2LCM12864驱动电路················································································82.3.3单片机与LCM12864接口时序···································································92.4运算放大器UA741·························································································102.4.1UA741优点··························································································102.4.2放大器的功能·······················································································112.4.3UA741的使用·······················································································112.5触发控制脉冲发生电路···················································································122.5.1触发控制脉冲发生电路电路图··································································122.5.2复杂可编程逻辑器件程序设计··································································13第3章软件流程设计································································································153.1主程序框图···································································································153.2定时器A中断子程序······················································································15第4章系统使用说明及实验设计·················································································164.1测量操作过程·······························································································164.2测试数据及结果分析······················································································164.2.1测试数据·····························································································16基于单片机和CPLD的单相交流相控调压系统设计-IV-4.2.2结果分析·····························································································16结论···················································································································17参考文献···················································································································18附录···················································································································19信息与控制工程学院专业综合设计说明书-1-第1章结论及总体框图设计1.1选题背景随着单片机技术的不断发展和CPLD技术的不断成熟使得单相交流相控调压成为可能,单相交流相控调压不论是在控制精度还是在可操作性上都有传统方式无法比拟的优势。单相交流相控调压源作为调压的分支,在工程技术和测量领域中有着重要的实用价值,其涉及的应用由稳定电磁场、校正电流表等扩展至激光、超导、现代通信和传感技术等领域。基于模拟电路的调压电路虽然可以实现高精度、宽电流范围输出,但其结构复杂,调整困难,指示不直观。随着单片机技术的发展,数字控制相控调压开始出现,其以控制灵活、调节方便等特点展示了良好的应用前景。1.2课题的设计目的课程设计是学生理论联系实际的重要实践教学环节。通过课程设计使学生获得以下几方面能力,为毕业设计(论文)奠定基础。1进一步巩固和加深学生所学一门或几门相关专业课(或专业基础课)理论知识,培养学生设计、计算、绘图、计算机应用、文献查阅、报告撰写等基本技能。2培养学生实践动手能力及独立分析和解决工程实际问题的能力。3培养学生的团队协作精神、创新意识、严肃认真的治学态度和严谨求实的工作作风。1.3相控调压基本原理及功能框图设计1.3.1基本原理电阻负载单相交流调压电路及波形图如图1-1所示。输出电压与的关系:当移相范围为0a。a=0时,输出电压为最大。Uo=U1,随a的增大,Uo降低,a=时,Uo=0。图1-1电阻负载单相交流调压电路及其波形基于单片机和CPLD的单相交流相控调压系统设计-2-仿真电路如图1-2所示,a=30°、a=60°、a=90°、a=120°时电路各点波形图如图1-3、1-4、1-5和1-6所示。图1-2电阻负载交流调压仿真电路图图1-3a=30°时交流调压电路各点波形图1-4a=60°时交流调压电路各点波形信息与控制工程学院专业综合设计说明书-3-图1-5a=90°时交流调压电路各点波形图1-6a=120°时交流调压电路各点波形1.3.2开关元件的选用开关元件选用SSR_380D03P,其内部结构图如图1-7所示。“380”指输出控制端可控硅耐压为电压有效值380V,“3”指最大电流有效值3A,“P”指控制模式为随机型。图1-7SSR_380D03P内部结构图SSR_380D03P属随机型控制元件,其对交流电压控制波形图如图1-8所示。