100kW微机控制单晶硅加热电源设计

文档编号:JD1021  文档字数:17537,页数:54

 摘 要
“100kW微机控制单晶硅加热电源”运用先进的计算机控制技术实现低电压大电流电源输出的功率调节，实现单晶硅加热电源的数字化控制。设计内容包硬件设计和软件设计两大部分，其中硬件设计包括温度设定值检测电路、晶闸管控制电路、CPU系统、远程通信接口、人机对话接口等部分，软件设计包括程序流程图以及具体程序设计。
 在硬件部分，主电源经变压器降压后由六只可控硅组成的三相桥式全控电路；采用MAX197实现将模拟量信号变成数字量信号，由AT89C52和数据存储器6264构成CPU 系统，功率控制部分采用MAX508将数字量转换为模拟量控制触发电路，达到调节功率的目的；键盘、显示电路采用专用的8279芯片，通讯接口电路采用MAX487构成的485通信方式，与其他的仪器仪表作远距离通信，实现远程控制。
 在软件设计部分，设计了主程序，自检程序，数据采集程序，数据处理程序，键盘控制中断服务程序，显示程序，功率调节程序等部分。软件设计采用了模块化的设计方法。
 关键词：单晶硅；可控硅；单片机；加热电源

Abstract
 “The 100kW microcomputer control monocrystalline silicon heating power source” has utilization the advanced computer control technology that realized the power regulation of low voltage and big electric current power source outputs , and monocrystalline silicon heating power source numerical control . The design includes two major parts, which are hardware design and the software design .The hardware design includes electric design of the temperature setting value examination, thyristor control circuit, CPU systematic, long-distance parts correspondence connection, man-machine conversation part and so on. The software design includes the program flow diagram and the concrete program design.
 In the hardware part, the main power source voltage is dropped by transformer firstly, then used the all controls the electric circuit of the three-phase bridge type which is composed by six silicon-controlled;  Using the MAX197 realizes that the simulate signal is transformed into  the digital signal; the CPU system is consist of AT89C52 and the data-carrier storage 6264; Power control section uses MAX508 to transform the digital quantity into the simulation quantity control triggering electric circuit, and achieve the goal of regulating power; The keyboard and the display circuit use the special-purpose 8279 chips; The communication part electric circuit corresponds with other instrument measuring appliances by the 485 correspondence way that is make up MAX487, and up to the long-distance control.
 In the software design part, have designed the master routine, the self-checking procedure, the data acquisition procedure, the data reduction program, the keyboard control interrupt service, the demonstration procedure, power regulation procedure and so on. The software design has used the modularized design method.
 Key word: Monocrystalline silicon; Silicon-controlled rectifier; Monolithic integrated circuit; Heats up the power source
 
 
目 录
 第1章 绪 论 1
1.1 加热电源的背景 1
1.2 加热电源的发展前景 1
1.3 加热电源的功能特点 1
 第2章 系统总体设计方案 3
 第3章 硬件设计 5
3.1 主电路及其元件参数的选取 5
 3.1.1 变压器的选择 6
 3.1.2 可控硅的参数选择 6
3.2 CPU系统设计 7
 3.2.1 单片机的选择 7
 3.2.2 键盘/显示接口 10
 3.2.3 片外RAM扩展 13
 3.2.4 复位电路设计 15
3.3 A/D转换电路设计 16
 3.3.1 MAX197结构及原理 17
 3.3.2 MAX197与单片机接口电路设计 19
3.4 数据采集电路设计 20
 3.4.1 电压/电流测量电路设计 20
 3.4.2 4～20mA输入电路设计 21
 3.4.3 温度测量电路设计 22
 3.4.4 手动输入电路设计 23
3.5 Ｄ/Ａ转换电路设计 23
 3.5.1 D/A转换器介绍 23
 3.5.2 MAX508结构及原理 24
3.6 触发电路的设计 26
3.7 声光报警电路的设计 27
3.8 通信口的设计 28
3.9 控制电源的设计 29
 第4章 系统软件设计 31
4.1 主程序 31
4.2 自检程序 32
4.3 数据采集程序 33
4.4 数据处理程序 36
4.5 功率调节程序 42
4.6 键盘/显示程序 44
 第5章 结 论 48
 参考文献 49
 致 谢 50 

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