高频通信开关电源 二

论文字数:34951,页数:66  附任务书，开题报告，文献综述

高频通信开关电源
 
 摘 要：本文分析了国内外高频开关电源的发展和现状，研究了高频开关电源的基本原理以及高频开关电源在通信系统中的应用，设计出一种实用于电信程控系统的高频开关电源，以替代传统的相控电源。该系统以IGBT作为功率开关器件，构成移相全桥逆变，采用脉宽调制（PWM）技术，它的开关频率为100KHz。PWM控制信号由集成控制器UC3879产生，从输出实时采样电压反馈信号，以控制输出电压的变化，控制电路和主电路之问通过变压器或光电耦合器进行隔离，并设计了软启动和过流保护电路。通过实验证明该系统能安全、可靠运行，达到了设计要求。
 关键词：高频开关电源；移相全桥；PWM；MOSFET
 
 High-frequency switch power
 Abstract：This paper has analyzed the development of the domestic and international high-frequency switch power and current situation, have studied the basic principle of the high-frequency switch power and high-frequency application in the communication system of switch power, it is practical in the high-frequency switch power of the programmer-controlled system of telecommunications to design one, in order to substitute traditional accusing of the power. System this regard IGBT as power switch device, is it move the whole bridge is it to go against, adopt pulse width modulate (PWM) technology to form, its switch frequency is 100KHz. PWM control signal produce by integrated controller UC3879, sample the feedback signal of the voltage in real time outputting, in order to is it output change of voltage to control, control circuit and main circuit is it isolate through the voltage transformer or the photoelectrical coupler to ask, design soft to start and is it is it protect the circuit to shed to pass. The experimental results show that the System can work safely and reliably.
 Keyword：High-frequency switch power； Phase Shifting Control Full Bridge；PWM； MOSFET

目    录

摘  要………………………………………………………………………………Ⅰ
Abstract……………………………………………………………………………Ⅱ
第一章  绪论…………………………………………………………………2
1.1 高频开关电源概述………………………………………………………………2
1.2 本课题的研究方法………………………………………………………………3
1.3 基本计算…………………………………………………………………………4
第二章  高频开关电源的主电路设计……………………………………5
2.1 高频开关电源的基本原理，……………………………………………………5
2.2 输入整流电路………………………………………………………………………6
2.3 高频变压器设计…………………………………………………………………9
2.4 高频开关变换器………………………………………………………………14
第三章  高频开关电源的PWM软开关设计…………………………18
3.1 高频开关电源的移相全桥电路………………………………………………18
3.2移相软开关一个完整周期十二个工作过程的详细分析………………………26
3.3 开关管的选择…………………………………………………………………40
第四章  高频开关电源控制电路的设计……………………………43
4.1 控制电路的基本原理…………………………………………………………43
4.2集成控制UC3879………………………………………………………………45
4.3 反馈电路的设计………………………………………………………………50
4.4 保护电路的设计………………………………………………………………54
4.5 辅助电源的设计………………………………………………………………56
4.6 均流电路设计…………………………………………………………………57
总结………………………………………………………………………………60
参考文献…………………………………………………………………………61
致谢…………………………………………………………………………………62