电气自动化专业毕业论文 直流开关电源设计.doc

电气自动化专业毕业论文--直流开关电源设计 摘 要 本设计是开关电源设计首先将开关电源与线性电源进行对比总结了开关电源的优点并对其当前的发展以及在发展中存在的问题进行了描述然后在对开关电源的整体结构进行了介绍的基础上对开关电源的主回路和控制回路进行设计在主回路中整流电路采用单相桥式功率转换电路采用单端正激功率转换电路采用增加副边绕组的方法实现多路输出其中功率转换电路DCDC变换器是开关电源的核心部分对此部分进行了重点设计控制电路采用PWM控制控制器采用UC3824设计了过压保护电路电压检测电路和电流检测电路对各个部分的参数进行了计算并进行了元器件的选型 关键词DCDC变换器PWM控制整流滤波 Abstract In this paperI designed a switch power supply system with three outputs Compare the switch power with linear power at first has summarized the advantage of the switch power have described its present development and there are natural questions in development On the basis of the thing that the whole structure to the switch power has made an introduction to the main return circuit and controlling the return circuit to design of the switch power The rectification circuit adopts the single-phase bridge type in the main return circuit the power changes the circuit and adopts and defies the power to change the circuit realize by increasing the winding of one pair of sides single and well that many ways are exported it is a key part of the switch power supply that the power changes circuit DCDC transformer have designed this part especially The control circuit adopts PWM to control the controller adopts the switch power integrated controller UC3824 design the circuit to measure voltage and the circuit to el measure ectric current selecting type of calculating and carrying on the components and parts the parameter of each part Keyword DCDC transformer PWM control rectification straining waves 目 录 1 概述 1 11开关电源的基本原理 1 12开关电源与线性电源的比较 2 13开关电源的发展与应用 2 14 开关电源当前存在的问题 3 2 整流电路的设计 5 21整流电路的选择 5 com波整流电路 6 com式整流电路 7 22 防止电流冲击的设计 7 23 参数计算以及元器件的选型 8 com参数计算 9 com 变压器参数 9 com 电容参数计算 10 3 DCDC变换器的设计 11 31控制方式的选择 11 32 功率转换电路的选择 12 com 推挽式功率转换电路 12 com 全桥式功率转换电路 13 com 半桥式功率转换电路 13 com 正向激励功率转换电路 14 com 反向激励功率转换电路 15 33单端正激变换器的设计 15 com理 16 com生线圈P2的工作原理 17 com 多路输出的设计 17 com 变压器设计 17 com参数计算 19 com 二极管和电容器的选择 21 com 开关管的选择 21 4 控制电路的设计 23 41