基于并联开关电源的功率比例分配研究

基于并联开关电源的功率比例分配研究

摘要

直流稳压电源主要分为线性稳压电源和开关稳压电源两种。开关稳压电源相比普通的线形稳压电源，具有非常多的优点。它的开关管以开关方式工作，功耗小，效率高，稳压范围宽，安全可靠，对电网电压及频率的变化适应性强，能够提供不同数值的输出电压。

本文主要研究使用两块开关电源模块并联形成的供电系统，输出电压稳定在8V，电流比例可调节。利用MATLAB的Simulink 环境，搭建降压结构DC/DC转换器的仿真电路，采用电流分配法，用调节电源模块的输出，来实现并联模块之间的电流分配。

关键词：开关电源并联；电流分配；MATLAB

基于并联开关电源的功率比例分配研究

Abstract

Dc voltage stabilizer are divided into linear voltage stabilizer and a switching power supply two kinds. A switching power supply compared to common linear manostat, has very many advantages. It's switch tube to switch work way, little power consumption, high efficiency, wide range of voltage, safe and reliable, and to power voltage and frequency changes adaptability is strong, can provide different values of the output voltage.

This paper mainly studies using two pieces of switch power supply module in parallel form of power supply system, the output voltage stability in 8V, current ratio can be adjusted. Use of MATLAB Simulink environment, set up step-down structure DC/DC converter circuit of the simulation, the current distribution method, adjust the power module with output, to realize the current distribution of parallel between modules

Keywords:Switch power supply parallel;Current distribution;MATLAB

基于并联开关电源的功率比例分配研究

目录

1 绪论............................................................................................................................................. 1

1.1开关电源技术发展方向 ....................................................................................................... 1

1.2题目分析 ............................................................................................................................... 3

1.3设计任务与指标 ................................................................................................................... 3

2 并联特性及电流分配方法 ......................................................................................................... 5

2.1并联特性 ............................................................................................................................... 5

2.2电流分配方法 ....................................................................................................................... 6

2.2.1下垂法 .............................................................................................................................. 6

2.2.2有源电流分配法 .............................................................................................................. 7

2.2.3最大电流法 ...................................................................................................................... 9

2.2.4平均电流分配法 .............................................................................................................. 9

2.2.5主从电流分配法 ............................................................................................................ 10

3 降压斩波电路........................................................................................................................... 11

3.1降压斩波电路的概念 ......................................................................................................... 11

3.2降压斩波电路的特点 ......................................................................................................... 11

3.3降压斩波电路的原理 ......................................................................................................... 11

3.3.1 PWM控制信号 ............................................................................................................. 11

3.3.2 降压主电路 ................................................................................................................... 12

3.3.3 降压反馈回路 ............................................................................................................... 13

4 软件仿真设计........................................................................................................................... 15

4.1软件介绍 ............................................................................................................................. 15

4.1.1 Matlab仿真软件介绍 ................................................................................................... 15

4.1.2 Simulink仿真环境介绍 ................................................................................................ 15

4.1.3 simulink电路仿真环境使用方法 ................................................................................. 16

4.2仿真电路的搭建 ................................................................................................................. 17

4.3电路参数的选择 ................................................................................................................. 18

4.3.1 PWM信号的参数选择 ................................................................................................. 18

4.3.2主电路各器件的参数选择 ............................................................................................ 18

5 系统调试................................................................................................................................... 21

5.1降压调试 ............................................................................................................................. 21

5.2电流比例1:1调试 ..................................................................................................... …… 此处隐藏：4748字，全部文档内容请下载后查看。喜欢就下载吧 ……