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1、 F 数控直流电流源学校：哈尔滨工程大学姓名：刘迪铭姓名：李庚姓名：林华云 目录摘要与关键-2.技术指标-41.1设计任务-41.2技术指标-51.3题目评析-52、 方案比较与论证-62.1各种方案比较-62.2方案论证-63、 系统硬件设计-73.1系统的总体设计-83.2单元电路的设计及参数的计算-83.5电原理图-84、 系统软件设计-94.1程序总体流程图-94.2各个功能模块流程图-94.3程序清单-95、 系统的组装-105.1整机结构图及工艺说明-105.2面板图及可调部件说明-106、 系统调试-116.1电路的测试方案-116.2测试仪器-126.3测试结果-137、 系统
2、电路存在的不足和改进的方向（或称结论）-14致谢-16参考文献-17附录-20摘 要本电路的控制器采用C8051F005单片机作为控制器,C8051F单片机是完全集成的混合信号系统级芯片（SoC），具有与8051兼容的高速CIP-51内核，与MCS-51指令集完全兼容，片内集成了数据采集和控制系统中常用的模拟、数字外设及其他功能部件；前端电路采用多级稳压的方式和采用四运放LM324进行高增益闭环调节。配合单片机进行数字与模拟混合调节方式，大大增强恒流源的稳定性，第一级运放放大倍数为5倍，第二级和达林顿管配合形成高增益电压闭环控制和计算机电流闭环控制保障可控恒流功能得以高精度完成。由于CPU直接
3、根据设定值与实际值的差别来调整D/A输出以控制输出电流，在A/D采样精确的基础上该电路在理论上有很强大的抗干扰能力而输出稳定的直流电流关键词：直流电流源，C8051F005, 数控，模数混合AbstractThe controller of this circuit adopts C8051F005 one-chip computer as the controller , what C8051F one-chip computer totally integrated mixes one grade of chips of signal system (SoC), have compatib
4、le with 8051 at a high speed CIP-51 kernel, it is totally compatible to collect with MCS-51 order, integrated data are gathered in slice and commonly used simulation , digital peripheral hardware and other functions part in control system; The front circuit adopts the way and adoption of the multist
5、age steady voltage to transport and put LM324 and gain the ring of closing to regulate high four times. Cooperate with the one-chip computer to carry on the figure and simulation and mix the way of regulating, strengthen and flow the stability of the source permanently greatly ,The first is it is it
6、 enlarge multiple 5 , the second , and Darington is it is it form high to gain voltage close ring control with computer electric current closing ring control to cooperate to in charge of to put to transport. Ensuring flowing controllably and permanently must use high accuracy to finish in function.
7、Because CPU adjusts D/A to export with the difference of actual value in order to control and export the according to the establishing value directly, this circuit has very strong anti-interference ability to export the steady direct current and flow in theory on the basis of the thing that A/D samp
8、les accurately.electric current. Keyword: The direct current flows in the source , C8051F005, numerical control, the modulus mixing. 一.设计任务与要求 数控直流电流源（F题）一、任务键盘控制器电流源负载显示器电 源设计并制作数控直流电流源。输入交流200240V，50Hz；输出直流电压10V。其原理示意图如下所示。 二、要求1、基本要求（1）输出电流范围：200mA2000mA；（2）可设置并显示输出电流给定值，要求输出电流与给定值偏差的绝对值给定值的1+10 mA；（3）具有“+”、“-”步进调整功能，步进10mA；（4）改变负载电阻，输出电压在10V以内变化时，要求输出电流变化的绝对值输出电流值的1+10 mA； （5）纹波电流2mA；（6）自制电源。2、发挥部分（1）输出电流范围为20mA2000mA
