开关直流升压电源(BOOST)设计.docx.docx_boost电路参数设计

开关电源

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摘要

BOOST 电路,是一种 DC-DC 直流斩波电路，又称为升压型电路。它可以是

输出电压比输入电压高。可以分为充电过程和放电过程。本次采用 matlab 仿

真分析方法, 可直观、详细的描述 BOOST 电路由启动到达稳态的工作过程, 并

对其中各种现象进行细致深入的分析, 便于我们真正掌握 BOOST 电路的工作

特性。

关

键词：斩波电路、BOOST 电路、导通、充电、放电

BOOST circuit is a DC-DC DC chopper circuit, also known as the boost

circuit. It can be the output voltage is higher than the input voltage. Can be

divided into a process of charging and discharging processes. The matlab

simulation analysis methods can be intuitive and detailed description of the

the BOOST circuit from the start to reach a steady-state process of working,

and various phenomena in depth analysis for us to really grasp the operating

characteristics of the BOOST circuit.

Keywords: chopper circuit, BOOST circuit is turned on, the charging and

discharging

目 录
前言.......................................................................................................................................... 1
系统方案设计...................................................................................................................... 2
电路的工作原理................................................................................................................... 2
参数的计算........................................................................................................................... 3
1 给定参数.......................................................................................................................... 3
2 计算 L、C.......................................................................................................................... 3
3 二极管选型...................................................................................................................... 5
4．电路的分析........................................................................................................................ 5
5． matlab 仿真分析............................................................................................................... 8
各模块功能及元器件选型................................................................................................... 8
1 TL494 工作原理................................................................................................................ 9
2 开关频率的计算............................................................................................................. 11
.............................................................................................................................................. 11
系统总设计原理图............................................................................................................. 11
设计结果与分析................................................................................................................. 12
1 比较基准波形图............................................................................................................. 12
2 TL494 输出波形.............................................................................................................. 14
3 输出纹波波形................................................................................................................. 14
4 电感输出波形................................................................................................................ 15
实验小结............................................................................................................................. 16
参考文献................................................................................................................................ 16