李升顺毕业论文定稿.doc

密级: 公开
科学技术学院
SCIENCE & TECHNOLOGY COLLEGE OF
NANCHANG UNIVERSITY
学士学位论文
THESIS OF BACHELOR
(2007 — 2011年)

题目: 小功率逆变器的设计与制作
学科部: 信息学科部
专业: 电子信息工程
班级: 电子071班
学号: 7020907012
学生姓名: 李升顺
指导教师: 黄仁如
起讫日期: 2010年11月29日—2011年5 月31日
小功率逆变器的设计与制作
专业:电子信息工程学号:7020907012 学生姓名:李升顺指导老师:黄仁如
摘要
逆变是把直流电能(电池、蓄电瓶)转变成交流电(一般为220v50HZ正弦或方波)的电子设备,逆变技术的发展随着电力电子技术,微电子技术和现代控制理论的进步不断改进,正朝着高频化,高效率,大功率,高可靠性,智能化的方向发展。小功率逆变器以它实用、简便、高效等迅速走红,可用于车载、家用电器或者对机内电池进行充电。逆变器可分为正弦波输出和方波输出两种。其中正弦波可以适应于各种负载。本文旨在探讨小功率逆变器的基本理论,本文提到的PWM法,即在周期不变的条件下通过改变脉冲波形的宽度来抑制谐波和调节逆变器输出电压的大小。而SPWM法就是在PWM的基础上,使输出电压脉冲在一个特定时间间隔内的能量等效于正弦波所包含的能量,利用SPWM法设计的逆变器具有可靠性高、体积小、重量轻、输出波形稳定等特点。
另外,本文还详细地分析了SPWM波产生的过程和逆变电源工作过程,对其进行仿真,验证了其可行性和有效性。
关键词:逆变器,PWM,SPWM,正弦脉宽调制
The design of low power inverter
Abstract
Inverter is the equipment of converting DC to AC , inverter technology with the power electronics, microelectronics and advances in modern control theory of continuous improvement, is heading for high-frequency inverter technology, high efficiency, high power Density, high reliability and intelligent direction. Low-power inverter with its practical, simple, efficient became so popular, it can be used for car, household appliances or to charge the battery inside. Inverter can be divided into sine wave output and square-wave output two kinds. Sine wave can be applied for various article aims to explore the small power inverter basic article mentioned the PWM method, means under the condition of invariable in cycle by changing the pulse width to suppress harmonic and adjust the size of the output voltage inverter. The SPWM is based on the PWM,to make the output voltage pulse at a particular time intervals energy equivalent to sine wave contains energy, designed by SPWM of inverter have the characteristics of High reliability, small volume, light weight, output waveform stability
This paper analyzes the process of generating SPWM wave power inverter work process, also its simulation to v