数字式可调稳压电源

相关论文：双输出可调稳压电源的设计 基于单片机的数字可调稳压电源

摘  要
 
 随着电源技术的不断发展，数控可调稳压电源成为电源研究领域的热门对象，其突出特点是数控特性，数控特性体现在以单片机为核心实现对电源的输出电压的控制。本设计使用的单片机芯片为89C51。先通过键盘输入数字电压，再将电压数值显示在数码管上，最后通过数/模转换得到模拟输出电压。本文主要探讨了数控可调稳压电源的设计方法。
 首先，简单介绍了数控可调稳压电源的选题背景，全面总结了数控电源的概念、特性以及设计思路等方面的问题。
 其次，系统介绍了数控可调稳压电源的设计方法。本文所讨论的数控可调稳压电源的设计共包括两个部分的设计：硬件电路设计和软件系统的设计。硬件部分包括：数字显示电路、键盘电路、单片机电路、数字/模拟转换电路、模拟信号放大电路以及输出电流过流保护电路的设计。软件部分包括：单片机的初始化以及各模块的执行程序。其中初始化包括：调整堆栈指针、需要使用的内部数据存储器的初始化、设置数控电源的开机输出电压以及CPU中断部分设置。
 接着，将软件和硬件相结合，从总体上实现数控电源的位选、数值调整等特性。
 最后，对设计结果做了整体地概述和分析。包括设计中遇到的问题、元器件的选择和个人体会等。

关键词：数控可调稳压电源；单片机；数字显示；位选择；数值调整 

 Abstract
 
 With the power technical progress, NC adjustable power supply power have become the most popular object of research areas, the prominent feature of the NC is NC characteristics.it embodied in the microcontroller as the core to achieve the power output voltage control.The design of the microcontroller chip for the 89 C51. first, Through digital keyboard input voltage, and then voltage values in the digital display on the final through D / A converters are analog output voltage. This article on the NC adjustable power supply design.
 Firstly, the NC adjustable power supply of choice to do a simple background briefing, a comprehensive summary of the NC concept of power, features and design ideas, and other aspects.
 Secondly, the NC adjustable power supply design to the system introduced. This paper presented by the NC adjustable power supply design, including a total of two parts of the design: hardware circuit design and software systems design. Hardware, including: the power supply design, figures show circuit, keyboard circuit, SCM circuits, digital / analog converter circuit, analog amplifier and the output current over-current protection circuit. Software includes: MCS module initialization and the implementation procedures. Initialized which include: adjusted stack pointer, the need to use the internal data memory of the initialization, set up the boot NC power output voltage and CPU interruption of the set.
 In succession, that is software and hardware integration, the overall realization of the power of the NC digital election, numerical adjustments characteristics.
 Finally, the results do the overall design overview and analysis. This includes some of the problems encountered in the design, the choice of components and personal experience and so on.

Key words: NC adjustable power supply; SCM; figures show; digital Choice; numerical adjustment

目 录
1  绪论 1
1.1  简介 1
1.2  设计选题背景 1
1.3  设计内容及论文结构 2
1.3.1  设计的主要内容 2
1.3.2  论文结构 2
2  系统电源的设计 3
2.1  稳压电源的基本原理 3
2.2  稳压电源的原理图 4
2.3  纹波处理 5
2.2.1  纹波的概念 5
2.2.2  纹波的害处 5
2.2.3  纹波电压的抑制方法 5
3  硬件电路设计 6
3.1  硬件系统结构框架 6
3.2  单片机发展和组成 6
3.2.1  单片机的组成 6
3.2.2  89C51单片机的引脚描述及片外总线结构 7
3.3  译码显示电路 9
3.3.1  输入、输出接口P0～P3 9
3.3.2  并行输入/输出口概述 9
3.3.3  串行输入/输出口概述 10
3.3.4  数码管 12
3.3.5  基于串行输入/输出口的数码管电路 12
3.4  数字/模拟转换电路 13
3.4.1  DAC0832数字/模拟转换器的应用 13
3.4.2  DAC0832数字/模拟转换器的介绍 13
3.5  键盘电路 17
3.5.1  中断系统介绍 17
3.5.2  键盘电路 20
3.6  放大电路的设计[7,8,15,16] 24
3.7  保护电路的设计 25
3.8 硬件部分的系统设计 26
4  软件系统设计 28
5  结束语 30
参考文献 31
致 谢 31
附 录 32