单相恒压恒频逆变器的设计

单相恒压恒频逆变器的设计

学生姓名: **** 学号: *********

系别:电气工程系专业: 电气工程及其自动化

指导教师: ****** 评阅教师:

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摘要

随着现代科学技术的迅速发展，逆变电源的应用越来越广泛，各行各业对其性能的要求也越来越高。单相正弦逆变电源是将直流电逆变成单相交流电的装置，它可将蓄电池逆变成交流电，为用电器提供交流电，也可作为计算机的UPS电源等。

本文首先介绍了逆变电源技术的应用与发展，分类与性能，及其控制技术。并在此基础上进行了方案论证，选取了合理的方案，以实现将12V直流电源升压为320V/50kHz的高频交流电，再经过整流滤波将高频交流电整流为高压直流电，然后采用正弦波脉宽调制法，通过脉冲控制IGBT的导通时间及顺序生成PWM波形，最后经过LC工频滤波电路，输出稳定的220V/50Hz标准正弦波电压，以达到供负载使用的目的。

本文基于已选定方案为前提进行了各部分电路的设计与分析，完成了主电路及相应的输入输出保护电路的设计，并进行了参数计算，分别简要介绍了各部分的原理，阐述了产生SPWM波的实现办法，以及基于DSP的系统软件设计和实现方案。

同时利用MATLAB 建立了单相逆变器的仿真模型，对其进行了仿真和实验，从各种情况下的试验结果可以看出，通过该逆变电路而得到的单相正弦波稳定性高且失真度小，设计成功。

关键词:逆变电源，整流，滤波，正弦脉宽调制

I

Abstract

With the rapid development of modern science and technology, the application of inverter power supply is more and more extensive, and the requirement of all walks of life on it is higher and higher. Single-phase sine inverter power supply is the device which can reverse DC into single-phase AC power. It can reverse the battery into AC which can be used by appliances, and it can also be used as the computer UPS power supply etc.

This paper first introduces the application and development of the inverter power supply technology, its classification and performance, and its control technology. On this basis, the demonstration program has been done. It selects the reasonable solution to achieve the 12V DC power supply boosting for 320V/50kHz high frequency alternating current, which the rectifier filter will rectify it for high voltage DC. Then use the SPWM method to control the conduction time and sequence of the IGBT by outputting PWM waves generated, finally, after LC industrial frequency filtering, the output of the stable 220V/50Hz quasi-sine wave of voltage will achieve the purpose of load use.

Based on the selected program, this paper has done the design and analysis of each circuit and has completed the design of the main

circuit and the corresponding input and output protection circuits and parameter calculation. The principle of each part has been briefly

introduced, the realization method of producing SPWM wave and the system based on DSP software design have been elaborated.

At the same time use MATLAB established a single phase inverter simulation model for the simulation and experiment, from all kinds of cases of the test results can be seen through the inverter circuits and get single-phase sine wave high stability and distortion degree of small, the design is successful.

Keywords:Inverter power source, rectification, filter, SPWM

II

目录

摘要 .................................................. I

Abstract ................................................ II 1 绪言

1.1 课题背景 .......................................................

1 1.2 逆变器的性能分析 (1)

1.3 逆变器数字控制技术 (2)

1.4 逆变器的分类 (3)

1.5 本文主要研究内容 ............................................... 3 2 方案论证

2.1 逆变方案 .......................................................

4 2.2 逆变控制方案 (5)

2.3 本章小结 ....................................................... 6 3 SPWM输出

3.1 SPWM波的基本原理 (7)

3.2 基于DSP实现SPWM (8)