毕业设计-简易线性数控直流稳压电源的设计与实现.docVIP

分类号： U D C：-408-(2011)1452-0 密 级：公 开 编 号：200 简易数控线性直流稳压电源的 设计与实现 论文作者姓名： 安俊洁 申请学位专业： 电气工程及其自动化 申请学位类别： 工学学士 指导教师姓名(职称)： 伍瑾斐(讲师) 论文提交日期： 2011年06月09日 简易数控线性直流稳压电源的设计与实现 摘 要 本设计完成了一款数字化线性直流稳压电源的制作，该电源可以将220V、50HZ5V~15V可调节的直流。系统由变压器、整流器、滤波器、稳压器组成。其中稳压器是基于具有放大环节的串联型稳压原理进行设计。为实现电源的数字化调节性能，设计中引入了单片机数字控制技术，利用STC89C52单片机对直流稳压电源进行数字调节控制。同时利用D/A、A/D芯片实现数字电路与模拟电路的连接。采用按键对电压进行预置和调节，使用方便，且成本较低。最后输出电压由数码管进行显示。除此之外，系统还设计了短路和过流保护电路及报警电路，使得该电源适用于各种有较高精度要求的场合。同时基于单片机的控制系统支持在软件设计上进行功能扩展，而并不需要增加额外的硬件开销，从而提高电源的性价比。经测试，该电源具有较好的带负载能力，具有较好的实用性。 关键词：单片机；数字控制；稳压电源；D/A转换器；D/A转换器 The Design and Implement of Simple Numerical linear DC Power Supply Abstract The design is a digital production of linear DC power. The linear DC power can convert 220V, 50HZ AC into 5V ~ 15V DC which is adjustable. The system consists of transformer, rectifier, filter and regulator. The regulator is designed based on the enlarged part of a series regulator. In order to achieve the power’s digital regulation, the SCM digital control technology, which used STC89C52 microcontroller for digital DC power supply regulation and control, is applied here. Meanwhile it takes advantages of D/A, A/D chip to connect digital circuit and analog circuit. The voltage can be preset and adjusted through buttons Unit, which is easy to use and low cost. Finally, the output voltage is displayed by the LED. In addition, the system also designed short-circuits, over current protection circuit and alarm circuit, making the power can be applied in various occasions where higher accuracy requirements are demanded. At the same time, the control system which is based on SCM supports extensions of software development, and does not require additional hardware, thereby enhancing the general performance of the linear DC power. It is proven that the power supply’s load capacity is good after testing, so it will have a good usability. Key words：MCU；Numerical Control;；Supply Power；D /A converter；A /D c