集成直流稳压电源毕业论文

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1、 I 摘摘 要要 本文设计了一个集成直流稳压电源。 设计采用变压器变压， 桥式整流电路进行整流， 电容对脉动电压进行滤波，最后用可调电阻和三端集成稳压器来实现直流电压在 0V 到 正负 15V 之间的连续可调。介绍了可调直流稳压电源电路的三种设计方案，并较详细地 介绍了一种应用三端稳压集成电路 LM317 的电路设计方法, 该电路利用 LM317 和电压 补偿电路以及软启动电路较好地解决了输出电压从 0V 起调和输出软启动的问题。该稳 压电源具有性能稳定，结构简单，电压指标精度较高，调节方便等优点。 关键词关键词: : 桥式整流、稳压、连续可调; 直流电源电路; 电压补偿; II Abstra

2、ct In this paper, the design is a regulated DC power supply. Adopted Transformer to change voltage, rectifier bridge rectifier circuit, capacitor ripple voltage on the filter, and finally with adjustable resistance and three-terminal voltage regulator integrated to achieve DC voltage between 0V to 1

3、5V continuously adjustable. Introduce three circuit designing methods of DC regulator with adjustable output. It also discusses how to design stable voltage circuit with LM317 in detail.With the help of voltage compensating circuit and switching circuit on softly,the problems that output is adjusted

4、 from zero volt and output is started softly are better solved.The regulated power supply with stable performance, simple structure, voltages guide line has a high precision, the advantages of regulation and so on. Keyword: Bridge rectifier;Regulators;Continuous adjustable;Direct power-supply circuit;Voltage compensation III 目目 录录 绪 论 . 1 1总体设计思路 2 1.1 直流稳压电源的种类及选用 2 1.2 稳压电源的技术指标及对稳压电源的要求 2 1.3 直流稳压电源的设计思路 3 1.4 直流稳压电源基本原理 4 1.4.1 变压环节 . 4 1.4.2 整流环节 . 4 1.4.3 滤波环节 . 4 1.4.4 稳压环节 . 5 2.