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PW控制整流滤波
Abstract
In this paperl 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 ret
urn 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
3DCDC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控制模式的选择23
com式控制23
com流模式控制24
com峰值电流模式控制25
com流模式控制26
com式控制27
42开关电源集成控制器27 com UC3824的内部结构和特点28 com UC3824的电路结构与工作原理5结论及设想38
致谢39 参考文献40
