《基于STC12C5616AD单片机的数控恒流电流源的设计》-毕业学术论文（设计）.doc

河南科技大学本科毕业设计（论文） PAGE PAGE 8 基于STC12C5616AD单片机的数控恒流电流源的设计 摘 要 目前，随着电池的广泛应用、微电子及单片机技术的快速发展，充电器的需求及应用也越来越广泛，恒流充电逐渐成为充电器的重要技术。另一方面，随着对高精确电源需求与电子技术的发展，基于单片机的恒流源控制的应用范围也越来越广，它已经不局限于为各种仪器、仪表提供恒流源。电源技术已逐步发展成为一门多学科互相渗透的综合性技术学科，它对现代通讯、电子仪器、计算机、工业自动化、电力工程、国防及某些高新技术提供高质量、高效率、高可靠性的电源起着关键作用。 本设计采用模块化模式，分为2个大的模块：控制模块和电源模块。控制模块以STC12C5616AD单片机为核心，8个独立键控以中断工作方式；LCD液晶显示器，实现实时显示。电源模块含有2个部分：电源和恒流源。电源主要实现的是将交流220v转化为驱动恒流源模块稳定的直流电压，同时为各个电路提供电源保障；恒流源的功能：由单片机输出电压控制，作为恒流源模块输入信号，达林顿管对其多级放大，以实现稳定恒流输出。负载上的电压，电流经过ADC采集输入单片机处理。 通过本次设计，需要实现恒定的电流输出，它的输出范围：0-1A，精度±0.5%；液晶LCD显示输出电流和电压。键盘能够调整输出电流的大小，调整步长10mA。 关键词：单片机、电源、恒流源、LCD、键盘 Microcontroller Based STC12C5616AD Constant Current Source Design of NC ABSTRACT Currently，With the extensive application of the battery, and the rapid development of micro-electronics and microcomputer technology, The demand and applications of rechargeable battery charger are more and more wide. Constant-current charging has gradually become an important technology. On the other hand, as the requirements for high precision power and the development of electronic technology, Based on SCM constant-current source control application scope is more and more wide, it is no longer confined to a variety of instruments, meters to provide constant current source. Power technology has gradually developed into a multidisciplinary integrated technology of each subject. To provide high quality, high efficiency, high reliability power In modern communication, electronic instrument, computer, industrial automation, power engineering, national defense and some new technology area ，it plays a vital role. The design is modular pattern, which was divided into two major modules: control module, and power modules. STC12C5616AD microcontroller as the control module is the core. And 8 independent keying is interrupted work, LCD, real-time display. Power supply module contains two parts: power supply and constant current source. That 220v AC power supply is ma