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摘要在现代社会，一个质量优秀的电子产品才能得到人们的认可和应用，而一个品质和性能良好的电子产品最重要的是有一个稳定可靠的电源。本课题的任务就是设计出一个智能开关电源，它不仅有稳定可靠的双输出，而且可以监测和显示电压，创造出更加人性化的开关电源。70319
本设计的反激式双路输出稳压开关电源是通过改变占空比，也就是电源的导通时间和关断时间的比值使输出电压随之变化，保持电压稳定输出5V和12V固定电压值，使用Arduino在输出端进行电压采样及显示，对电压不稳定现象进行报警提示。在本课题中，MOSFET开关管是开关电源中最主要使用的器件，要调节和稳定输出电压的数值就要控制MOSFET开关管的导通和关断的时间，用带有电气隔离的反激式变压电路来变压，UC3844作为主控芯片可以使电压和电流双闭环控制，线性光耦合器PC817、可控精密稳压源TL431芯片结合相关电路形成反馈电路，这几个部分使设计出的智能开关电源的输出电压是稳定的。
该论文有图26幅，表1个，参考文献20篇。
毕业论文关键词：开关电源 Arduino 反激式 UC3844
Intelligent Power Supply
Abstract
In modern society, a good quality electronic products to get people's recognition and application. A good quality and performance of electronic product is most important is to have a stable and reliable power supply. The subject's task is to design an intelligent switching power supply, it is not only stable and reliable dual output, and can monitor and display voltage. This design creates a more humane switching power supply.
This topic is designed with a dual output flyback voltage switching power supply. The main advantage of the design of university study power electronics technology, by changing the power of on-time and off-time ratio, that is, the duty cycle to regulate the output voltage to maintain a stable output voltage 5V and 12V fixed voltage value. Designed for use Arduino sampling the voltage at the output and display of alarm over current phenomenon. In this issue, for MOSFET switching power supply is the most important devices used to regulate and stabilize the output voltage value must control MOSFET switch turn-on and turn-off time. With a flyback transformer circuit with electrical isolation to swing.UC3844 as the main chip allows the voltage and current double closed loop control. Linear optocoupler4 PC817, controlled precision voltage source with related TL431 chip circuit forming a feedback circuit. These parts makes intelligent design a switching power supply output voltage is stable.
This paper has 26 figures, 1 tables, 20 references.
Key word：Switching Power Supply Arduino Flyback UC3844
目 录
摘 要 I
Abstract II
目录 III
图清单 V
表清单 V
变量注释表 II
1 绪论 1
1.1 课题研究背景及意义 1
1.3 论文的主要工作 2
2 系统总体方案设计 4
2.1 开关电源基本概念 4
2.2 开关电源工作原理 4
2.3 智能开关电源总体设计思路 5
3开关电源主要元器件介绍
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