文档介绍：摘要
本设计主要应用开关电源电路技术有关知识,涉及模拟集成电路、电源集成电路、直流稳压电路、开关稳压电路等原理,充分运用芯片 TL494 的固定频率脉冲宽度调制电路及场效应管(N 沟道增强型 MOSFET)的开关速度快、无二次击穿、热稳定性好的优点而组合设计的电路。该逆变电源的主要组成部分为:DC/DC 电路、输入过压保护电路、输出过压保护电路、过热保护电路、DC/AC 变换电路、振荡电路、全桥电路。在工作时的持续输出功率为 150W,具有工作正常指示灯、输出过压保护、输入过压保护以及过热保护等功能。
方波逆变是一种低成本,极为简单的变换方式,它适用于各种整流负载,但是对于变压器的负载的适应不是很好,有较大的噪声。在逆变电源的发展方向上,轻量、小型、高效是其所追求的目标。
关键字:模拟滤波器;巴特沃斯滤波器;双线性变换;幅频特性
Abstract
The design applying the switching power source circuit technology in connected. Relating with knowledge about what imitate integrated circuit、 power source integrated circuit、power amplification integrated circuit and switching regulated voltage circuit on principle. Sufficient apply chip TL494 fixed-frequency pulse width modulation circuit and field effect transistor (N channel strengthen MOSFET) whose switch speed quick, nothing secondary Break down and hot stability good merit to design circuit. Owe the inverter main part ingredient by DC/DC circuit、importing the over-voltage crowbar circuit 、 exporting an over-voltage crowbar protect a circuit 、 overheat protective circuit、DC/AC shifts circuit、oscillating circuit and entire bridge circuit. Continuing for during the period of the job exports power functions such as being 150 W, having the regular guiding lights working, exporting an over-voltage crowbar, importing the over-voltage crowbar and overheat protective.
Square wave inverter is a low cost, very mutation means, it is suitable for various rectified load, but for the load of the transformer to is not very good, which is of great noise. In the development direction of the inverter power supply, light weight, small size, high efficiency is the pursuit of the goal.
Key words: DC/AC transform circuit;oscillating frequency;pulse width modulation (PWM).
目录
1 开关电源介绍 1
概述 1
应用方面 1
2 逆变电源原理与构成 3
逆变电源的基本构成和原理 3
逆变电源的技术性能指标及主要特点 5
逆变电源的主要元器件及其特性 6
场效应管 10
三极管 10
3 各部分支路电路设计及其参数计算 12
各部分支路电路设计及其参数计算 12
输入过压保护电路 13
输出过压保护电路 14
DC/A