断路器的设计

电子机电论文编号:JD571 附外文翻译,开题报告,实习报告,任务书,原理图,论文字数:17773,页数:46

目  录

1  引言 ………………………………………………………………………………1
1.1  断路器及其操动机构的现状…………………………………………………1
1.2  真空断路器在国内外的发展…………………………………………………2
1.3  永磁机构技术在国内外的发展 ……………………………………………… 3
1.4  本课题研究的意义………………………………………………………………4
2  设计思路与总体方案………………………………………………………………6
2.1  设计思路及工作原理…………………………………………………………6
2.2  总体设计方案及系统框图……………………………………………………7
3  硬件设计…………………………………………………………………………8
3.1  AT89C51单片机硬件结构……………………………………………………8
3.2  信号测控单元的设计 …………………………………………………………11
3.3  充电及分合闸控制单元的设计………………………………………………15
3.4  键盘及显示单元的设计………………………………………………………17
3.5  系统电源单元的设计…………………………………………………………20
4  软件设计………………………………………………………………………… 22
4.1  主程序设计……………………………………………………………………23
4.2  键盘扫描子程序的设计………………………………………………………24
4.3  显示子程序的设计 ……………………………………………………………25
4.4  信号采集子程序的设计………………………………………………………26
4.5  控制子程序的设计 ……………………………………………………………27
5  设计总结…………………………………………………………………………29
致谢 …………………………………………………………………………………30
参考文献 ……………………………………………………………………………31
附录A  系统程序清单 ……………………………………………………………33
图1  系统硬件原理图 …………………………………………………………46

摘 要
    真空断路器作为中压开关的主流产品，其可靠性和智能化水平对电力系统的稳定和自动化程度将产生深远的影响。永磁操动机构作为真空断路器一种新型的操动机构，具有零部件数量少、可靠性高、免维护等传统断路器操动机构无法比拟的优点，受到了世界各国的普遍关注。
    AT89C51单片机是一款八位单片机，它的易用性和多功能性受到了广大使用者的好评。本设计介绍了一种基于单片机控制的真空断路器永磁操作机构控制系统。系统以设计题目的要求为目的，采用AT89C51单片机为控制核心，通过信号的采集和分析，对真空断路器进行分、合闸的控制。本系统将分成电源、信号采样电路、显示和键盘扫描电路、控制电路和软件等几部分进行详细论述 ,并附以详细的插图。整个系统的电路结构简单，可靠性能高。本文着重介绍了该系统的硬件和软件的设计方法。

关键词  真空断路器  永磁操动机构  单片机   控制系统

Title               The Design Of Circuit Breaker                    

Abstract
Vacuum Circuit Breaker (VCB) is the primary product of middle voltage electric switch equipment. Its reliability and intelligent levels have far-reaching influence on the stability the extent of antomatization for electric power system. Permanent Magnetic Actuator(PMA) as a kind of new actuator of VCB, has the advantages of less part number, higher reliability and maintenance-free, and overshadows the traditional actuators for Circuit Breaker (CB),so it has been paid more and more attention by people
all over the world.
AT89C51 is a 8-bit single chip computer. Its easily using and multi-function suffer large users. This design introduces one control system of PMA for VCB by single-chip computer. This system, regarding the request of the topic, adopting AT89C51 for controlling core, appling the sampling and analyse of signal, control the switching and splitting of VCB. The design includes the detailed introduction of the following main components: power supply, signal sampling circuit, scanning circuit of display and keyboard, control circuit and software. The circuit diagrams are attached for clear explanation. The electric circuit construction of whole system is simple and the function is dependable. This article emphasizes introduced the hardware and software system designs.

Key Words:  Vacuum Circuit Breaker   Permanent Magnetic Actuator   single chip computer   control system