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1、安徽理工大学毕业设计本科毕业设计基于单片机的高压脉冲点火装置High-voltage pulse ignition device based on MCU学 院：电气与信息工程学院 专业班级： 自动化11-3 学生姓名： 指导教师： 2015 年 5 月 30 日基于单片机的高压脉冲点火装置摘要随着现代生产技术的不断进步，各种用电设备日趋精密化，复杂化和小型化。为了保证其安全运行，这就对各用电设备的控制性提出了更高的要求。目前普遍采用微机作为主流控制解决方案，而单片机作为一种特殊的控制单元，正逐步在更加广阔的领域得到应用。例如在很多场合，需要脉冲的脉冲宽度、幅度以及频率能够调节。以往低频高压脉
2、冲点火的制作主要采用脉冲变压器升压法或者利用高反向耐压开关管进行直流斩波的方法，但由于变压器外形较大和高压开关管耐压值受到限制不易制造，故难以达到工业生产要求。本论文的高压脉冲点火用单片机控制高频PWM调制芯片SG3525工作时间的方法，改变逆变电路工作状态，最终使系统输出脉冲波形。其输出脉冲电压幅度连续可调，脉宽和频率也均可由用户在规定范围内调整。本论文还采取了有效的输出保护策略，当系统过流时，立即进行保护动作，且不会因为实现保护功能而引起其他器件的损坏或对用户造成人身伤害，安全性高，是一种稳定可靠的可调高压脉冲点火装置。本论文首先阐述了课题的研究背景，对各种脉冲发生方法进行了比较。然后介绍
3、了系统整体框图及其工作流程。并按模块化的设计思想分别对系统的硬件电路和软件设计进行了分析。硬件电路包括：单相交流调压模块DTY220D40E的使用，主电路拓扑结构分析，辅助电源电路，脉冲形成电路，稳压调压电路，单片机控制单元设计，过流保护电路，高频高压变压器的设计，键盘输入模块的设计，液晶接口电路。软件编程部分的主要算法有：控制芯片负责的键盘处理程序，脉冲产生算法；检测芯片负责的脉冲检测算法，频率检测算法以及两芯片都要用到的液晶显示程序。同时，给出了各程序模块的设计思想和流程图。最后根据软硬件设计结合搭建实验电路，得出了较理想的系统输出脉冲波形，证明了其可行性。关键词：高压脉冲，单片机，频率脉
4、宽可调， 点火High-voltage pulse ignition device based on MCUAbstractWith the development of modern production technology, all kinds of power equipment are becoming more sophisticated, complicated and miniaturization.In order to ensure its safe operation, this paper puts forward higher requirements for the
5、 control of the power equipment. Now commonly used microcomputer as main control solutions, the single-chip microcomputer as a special control unit, is gradually in broader areas. For example, in many occasions, the pulse width, amplitude and frequency of the pulse can be adjusted. Previous low freq
6、uency and high voltage pulse ignition production mainly adopts pulse transformer step-up method or using high reverse voltage switching tube method for DC chopper, but due to transformers shape is bigger and the high voltage switch pipe pressure value by limit is not easy to manufacture, so it is di
7、fficult to achieve industrial production requirements.The high voltage pulse ignition using single-chip microcomputer to control the working time of the PWM modulation chip SG3525 method, change the condition of the inverter circuit and ultimately makes the system output pulse waveform. The output p
8、ulse voltage amplitude can be adjusted continuously, the pulse width and frequency can be adjusted by the user within the prescribed range. This paper has also taken the effective output protection strategy, when the system flow over immediately protection action, and will not because of the realiza
9、tion of protection function caused by damage to the other device or result in injury to the user, high safety, is a stable and reliable can be adjustable high voltage pulse ignitinon device.In this thesis, the backgbround of the research is firstly introduced, and the comparison of the various pulse
10、 generating methods is carried out. And then, the overall system block diagram and its workflow are introduced. The hardware and software design of the system are analyzed according to the idea of modularization. Hardware circuit comprises a single-phase AC voltage regulator module DTY.220D40E. Anal
11、ysis of the topology structure of main circuit, auxiliary power circuit, pulse forming circuit, voltage regulator circuit, MCU control unit design, over flow protection circuit, the high-frequency and high-voltage transformer design, the keyboard input module design, LCD interface circuit, output si
12、gnal acquisition circuit and a / D conversion circuit. Part of the software programming, the main algorithms: the keyboard control chip is responsible for processing procedures, pulse generation algorithm; detection chip is responsible for pulse detection algorithm. Frequency detection algorithm and
13、 two chip LCD display program to use. At the same time, the design idea and flow chart of each program are given.Finally, the experimental circuits are set up according to the design of hardware and software, it is concluded that the ideal system output pulse waveform and prove its feasibility.KEYWO
14、RDS: HIGH VOLTAGE PULSE POWER SUPPLY; SCM; FREQUENCY PULSE WIDTH ADJUSTABLE; TRANSFORMER39目录摘要IAbstractII1 绪 论31.1 本论文的背景和意义31.1.1本项目现状31.1.2脉冲点火控制系统 31.2 本论文的主要方法和研究进展41.2.1工作原理41.2.2主要特点41.2.3主要用途51.2.4控制系统51.3本论文的主要内容61.4本章小结72总体设计82.1总框图82.2脉冲实现方式93 系统硬件电路的设计103.1 主电路拓扑结构103.1.1常用拓扑结构103.1.2半桥逆变
15、式变换器工作原理113.2高频开关电源主要功能模块123.2.1 全隔离单相交流调压模块123.2.2辅助电源电路143.2.3脉冲形成电路153.2.4稳压调压电路183.2.5驱动电路203.2.6倍压整流电路213.2.7过流保护电路233.3脉冲点火控制器系统253.3.1脉冲点火控制电路的功能253.3.2脉冲点火控制电路263.3.3火焰检测电路263.3.4点火器原理与能量设计分析273.4人机接口电路283.4.1键盘输入模块的设计283.4.2液晶接口电路293.6本章小结324 系统软件设计334.1整体程序流程334.2控制芯片程序模块354.2.1键盘处理程序354.2.2脉冲产生程序36参考文献38致谢391 绪 论1.1 本论文的背景和意义1.1.1本项目现状现代社会对自动化的应用越来越多，结合自动控制、计算机编程技术等可以对点火装置进行控制，也是属于现代电力电子技术的具体应用。自动化的发展带动控制技术的多
