摘 要
电子科技大学成都学院
毕 业 设 计 论 文
论文题目 单相变频电源
学生姓名 余 健 学 号 1040830231 专 业 电气工程及其自动化 系(分院） 电子工程系 指导教师 蒋世奇
I
ABSTRACT
指导单位 电子科技大学成都学院
摘 要
随着科技和现代工业的发展，变频电源在当今社会的发展起着非比寻常的作用。由于世界各国电网指标不统一，出口电器厂商需要电源模拟不同国家的电网状况，为工程师在设计开发、生产线测试及品保的产品检测、寿命、过高压/低压模拟测试等应用中提供纯净可靠的、低谐波失真、高稳定的频率和稳压率的正弦波电力输出；进口原装电器、设备的用户也需要对我国电网进行变压、变频以保证进口电器、设备的正常运转；满足航空电子及军事设备高频的需求。
本篇论文设计的变频电源属于单相正弦波交流电源(AC-DC-AC)。此次电源系统设计包括主电路、控制电路和保护电路。论文首先介绍了变频电源的发展情况；然后阐述了变频电源的工作原理；接着介绍电源系统(EG8010)方案的确定；紧接着详细介绍了系统电路设计，包括变频控制电路、保护电路以及驱动电路；其中变频控制电路采用了芯片EG8010线性可调电路；最后介绍了AT89C51单片机辅助系统的软件和硬件设计，包括设计的具体过程和调试结果，并给出了系统原理图和程序清单。
关键词：变频电源，EG8010，MOSFET，单相正弦波交流电源，逆变控制电路
II
ABSTRACT
ABSTRACT
With the development of modern industry, science and technology, variable frequency power supply in today's society plays an unusual role. Due to the grid index is not uniform around the world, export electronics makers need power simulation grid conditions, in different countries for engineers in design, development, production line testing and quality assurance of product testing, life span, high voltage/low voltage simulation test applications provide clean and reliable, low harmonic distortion, high stable frequency and voltage regulation rate of sine wave power output. Import original electrical appliances, equipment users also need to the power grid variable voltage and frequency to ensure the normal operation of imported equipment in China so as to meet the needs of avionics and high frequency of military equipment.
This paper design frequency conversion power belongs to the single-phase sine wave AC power (AC-DC-AC). The power supply system design including main circuit, control circuit and protection circuit. The development of variable frequency power supply is firstly introduced in the paper. Then the working principle of frequency conversion power is expounded on. The scheme of power supply system (EG8010) is applied in the development. And the system circuit design, including the frequency conversion control circuit, protection circuit and driver circuit are completed. Linear adjustable circuit of The EG8010 chip is adopted to control the frequency conversion. Finally, the software and hardware of introduced the AT89C51MCU auxiliary system are designed, including the specific process of the design and debug results, and the system schematic diagram and the program listing is given.
Key Words: Variable frequency power supply, EG8010, MOSFET, Single-phase sinusoidal ac power supply, inverter control circuit
II
目录
目 录
第1章 概论 ........................................................ 1 1.1 电源的基本概念 .................................................. 1 1.2 变频电源与变频器的区别 .......................................... 1 1.3 变频电源的分类 .................................................. 1 1.4 变频电源的应用 .................................................. 2 1.5 变频电源的发展趋势 .............................................. 3 第2章 变频电源的理论基础 .......................................... 5 2.1 变频电源的基本原理 .............................................. 5 2.2 变频电源的拓扑结构 .............................................. 5 2.3 逆变电源介绍 .................................................... 7 第3章 变频电源系统方案设计 ....................................... 10 3.1 系统方案选择 ................................................... 10 3.2 逆变专用芯片选择方案 ........................................... 10 3.2.1 EG8010芯片的描述 ............................................. 11 3.2.2 EG8010的特点与应用领域 ....................................... 12 3.2.3 EG8010的变频模式 ............................................. 13 3.3 变频电源中逆变电路的方案 ....................................... 14 第4章 系统变频电路设计 ........................................... 17 4.1 整流滤波电路设计 ............................................... 18 4.2 控制模块设计 ................................................... 19 4.3 驱动模块设计 ................................................... 21 4.4 功率主板模块 ................................................... 22 4.5 保护模块设计 ................................................... 25 4.5.1 电流保护 ..................................................... 25 4.5.2 电压保护 ..................................................... 26 4.5.3 温度保护 ..................................................... 28 第5章 微机控制系统设计 ........................................... 30 5.1 硬件设计 ....................................................... 30
III