王亚蒙 _B14043206_直流三电压输出开关电源设计.doc

直流三电压输出开关电源设计 摘 要 该设计是开关电源设计，先介绍的是开关电源的优点，还对当前的发展情况及其在发展过程中存在的问题进行了简述，然后简要说明开关电源的集体布局的时候，还简要说明了开关电源电路的主回路和控制回路。 因为电力电子技术的高速成长，电力电子系统的使用规模变得很宽，电子装备的类型很多。由于电子设备须要可靠的电源，电源机能的好坏影响了整个电子系统的可靠性以及安全性。然而电子装备体型小、本钱少等优点，使得电源的成长方向以轻、薄、和小为主，电源的要求也很多，开关电源恰恰合适这些要求。开关电源的使用很广范，由于开关频率的接连升高，令开关电源的机能也有所变高，此中集成度升高，功耗更低，电路越发简小，工作越发靠谱，成为开关电源成长的几个方面。 本文在介绍了国内外技术发展趋势的基础上，通过学习和了解高频开关电源中的电器元气件、开关电源控制技术、功率因数校正电路等内容，设计了直流三电压输出开关电源。 关键词：开关电源，PWM控制，整流， Three dc Voltage Output Switching Power Supply Design ABSTRACT The design is a switching power supply design，firstly this paper introduces the advantage of switch power supply，and its current development ，and the problems in developing are described，then the whole structure of the switch power supply is introduced，on the basis of main circuit and control circuit of switching power supply design. With the rapid development of electronic technology，application field of electronic system is more extensive，electronic equipment types will be more.While the electronic equipment are inseparable from reliable power supply’ the clerk performance quality directly related to the electronic system reliability and safety. Electronic equipment miniaturized and low cost in the power of light and thin’ small and efficiency as the main development direction of power requirements，more agile diversity’ switch power just to meet these requirements.Switch power supply used more and more widely，switch frequency switch power supply the continuous improvement of the performance also is able to further optimization’ integration lower power consumption is higher，more simple circuit’ is more reliable development direction of switch power. This paper introduces the technical development trend at home and abroad on the basis of study and understand’ through the high frequency switching power supply qi pieces’ switch power electronic control technology，power factor correction circuit’ the content such as design of three dc voltage output switching power supp