主板开关电源的设计及检测(附开关电源电路原理图)
主板开关电源的设计及检测(附开关电源电路原理图)(任务书,开题报告,毕业论文22000字,外文翻译)
摘要：随着电力电子技术的发展和新型功率元器件的不断出现，开关电源技术得到了飞速的发展，在计算机、通讯、电力、家用电器、航空航天等领域取得了显著的成果。本论文是通过用电源控制芯片M51995AFP设计并制作一种开关电源，该开关电源是通过PWM技术控制开关的占空比来调整输出电压的，以达到稳定输出的目的。
本毕业设计的宗旨是实现开关式电源方案并运用到交流电源稳定的场合。阐述一种利用脉冲宽度调制（PWM）技术配合高速电子开关、高频电子变压器和LC滤波器实现交流开关式稳压电源的实现思路。与传统的可控硅调角式交流稳压电源相比，具有效率高、体积小、非线性失真度低、输出电压和电流稳定等特点。本文先从交流开关稳压电源的实现机理逐步展开，涉及到可控正弦波产生器、三角波发生器、比较器、脉冲宽度调制（PWM）器、高速电子开关、高频电压变换器以及微处理器及其周边元部件等。接着对调试、检测等也有相应的叙述
关键词：脉冲宽度调制（PWM）器 ； 电子开关 ； 电子变压器 ；
Design and Detection Of The Main board’s Power Switch
Abstract：With the development of the electronic technology and the emerging of new power components, switching power supply has been widely used in computer, communications, electricity, home appliances and aerospace fields, achieving remarkable results. The purpose of this papers is to design and make a switching power supply based on control chip M51995AFP and PWM Control. This switching power supply could adjust the output voltage by using the duty cycle of PWM Control. Stable output purposes could be attained.
The objective of this graduation project's is to realizes the switch type power source plan and use into the alternating current supply stable situation. Elaborated a kind of mentality that using the pulse width modulation (PWM) the technical coordination high-speed electronic switch and the high frequency electronic transformer and the LC filter to realize the exchange switch type voltage-stabilized source. Compares the angle type exchange voltage-stabilized source with the traditional silicon-controlled rectifier. This type has high efficiency , small volume , low misalignment degree of distortion ,and it is very stable of output voltage and electric current and so on characteristics. This article Launches gradually from the mechanism of the exchange switch voltage-stabilized source, involves to the controllable sine wave producer, the triangular wave generator, the comparator, the pulse width modulation (PWM), the high-speed electronic switch, the voltage converter as well as the microprocessor and the peripheral Yuan part and so on. Then to debugs, the examination and so on also have a corresponding certain introduction, finally has given the conclusion which tests according to the design requirements. [来源：http://www.doc163.com]
Key words: Switching Power Supply; Duty cycle; PWM
毕业设计(论文)使用的原始资料(数据)及设计技术要求：
本实验主要以M51995AFP芯片为核心组建用高频变压器的变压系统，将高频方波
脉冲电压经整流滤波后成为直流电压输出
技术要求：
1、将电网交流电源直接整流为交平滑的直流电
2、将整流后的直流电源变为高频交流电
3、根据负载需要，提供可靠的直流电源
4、翻译一篇相关英文技术资料 [资料来源：http://Doc163.com]
