基于PWM技术的开关电源的设计毕业设计_计算机程序设计_计算机设计辅导_计算机设计代做_java_安卓_小程序_springboot

基于PWM技术队开关电源的设计

摘要：开关电源摒弃与工频变压器，电源在电力电子器件在关闭状态下工作，传统的开关电源，整体效率是非常高的。由于其体积小，重量轻，效率高，因而发展十分迅速增长的应用范围。本文是电流开关电源设计的发展趋势完成后，建立一个反激式转换器主电路设计输入整流/滤波部分，控制器，输出整流滤波电路，反馈网络，启动和电源集成电路和保护电路，然后结合这些部分来完成系统的设计。低成本，高精度的电路设计。 UC3844是一种高性能的固定频率电流模式控制器。集成电路的特征在于振荡器，温度补偿的参考，高增益误差放大器，电流检测比较器，和高电流图腾柱输出，它非常适合用于驱动功率MOSFET。这个开关电源可用于AV85-240V输入电子产品。这个特殊的开关电源可以提供25-150W的功率输出，它可以在办公室小型分组交换机（PBX）等产品中使用。

关键词：开关电源；PWM；反激变换器

PWM switching power supply design technology based

Abstract： The switching power supply has cancelled the conversion depressor that traditional power sources adopt. In power supply, electronic device works in soft switch condition, so the entire efficiency to be very high. Because the volume is small, the weight is light and the efficiency high thus it develops extremely rapidly, the application of the soft switching power supply expands day by day. This paper is a combination of current trends switching power supply design is completed,the paper is mainly built using fly-back converter main circuit.The design consists of six parts:input rectifier /filter section, controller, output rectifier and filter circuit, feedback network,start-up and integrated power supply circuit and protection circuit, then these parts together to complete the system design The circuit design of low cost and high accuracy.UC3844 is a high performance fixed frequency current mode controller, The IC features, with the oscillator, temperature compensated reference, high gain error amplifier, current comparator and high current sampling totem pole output, is ideal for driving power MOSFET devices. This switching power supply can be used for AV85 ~ 240V input of electronic products. This particular switching power supply can provide 25 ~ 150W output power, can be used in the office of small packet switches (PBX) and other products.

Key Word：Switch Power Supply；PWM；Fly-back converter

第1章绪论………………………………………………. 1

1.1 开关电源的发展状况………………………………….. 1

1.2 我国开关电源历程……………………………………. 2

1.3 开关电源的技术发展趋势………………………………. 3

1.4 本文研究的目的……………………………………… 5

第2章开关电源原理分析……………………………………. 6

2.1 开关电源基本工作原理………………………………… 6

2.2 开关电源的分类……………………………………… 6

2.3 开关电源的优缺点……………………………………. 8

2.3.1 开关电源的优点………………………………… 8

2.3.2 开关电源的缺点………………………………… 8