直流稳定电源

文档编号:ZD873    文档字数:21169,页数:45

 摘   要
 
 电源是各种电子、电气设备工作的动力，是自动化部件不可缺少的组成部分，它广泛应用于科学研究、经济建设、国防设施及人民生活等各个方面，是电子设备和机电设备的基础。在电源的众多类型中，直流稳压电源应用最为广泛，它与国民经济各个部门息息相关，特别是在实验室、IT业、采矿、小型电器等领域中应用更为广泛。本电路由四个模块组成：稳压电源，稳流电源，DC－DC变换器和显示模块，如图所示。稳压电源采用两级稳压电路，前级为DC－DC开关电源，后级为线性稳压电路，为进一步提高效率，两级间采用了恒压差控制技术。稳流电源采用了经典的串联反馈电路，并做适当的改进。DC－DC变换器采用单端反激式开关电源，具有效率高，输出电压范围宽，输出电流大的特点。显示模块由单片A/D集成电路7107构成。
 
 
 关键字：稳压   稳流   DC－DC变换   显示
  
 
 abstract
 
 The power supply is a dynamical of every kind of electronics, electricity equipments work,and it is an indispensability part of automatization. it is extensive to apply to study of science, economic developments, national defense facilities and people life and so on, It is the base of electronic equipments and electromotors.  In numerous types of the power supply, the direct current voltage-stabilized source application most for extensive, it is vitally related with the national economy each section, in the laboratory, IT industry, mine for minerals, abbreviated wiring wait realm especially more widespread. The circuit has four parts: regulated voltage supply, regulated current supply, DC-DCconverter and display. The voltage supply uses two-stage control. The first is a DC-DC switching power and the second is a linear circuit. The constant voltage drop technology is adopted between the two stages to obtain high efficiency. The current supply is the classical feedback series circuit and make some improvements .The DC-DC converter is a isolated feed back switching power with high efficiency ,wide range output of voltage and current。The display is AD7107.

Key words：regulated voltage supply  regulated current supply  DC-DC converter  display

 目  录
摘要…………………………………………………………………………………………….2
1 绪论………………………………………………………………………………………….6
   1.1  电源的意义……………………………………………………………………………7
   1.2  电源的分类……………………………………………………………………………7
2 直流稳定电源的设计…………………………………………………………………….9
2.1  直流稳定电源系统概述……………………………………………………….……..10
2.2  稳定电源的技术指标………………………………………………………………...10
3  稳压模块………………………………………………………………………………….13
 3.1  方案的确定………………………………………………………………………….13
 3.2  开关电源的设计……………………………………………………………………20
 3.3  设计原理与步骤…………………………………………………………………….23
4  稳流模块………………………………………………………………………………….29
 4.1  直流稳流电源的性能参数………………………………………………………….29
 4.2  串联调整型电源的工作原理……………………………………………………….30
 4.3  参数稳流电源……………………………………………………………………….31
 4.4  直流稳流电源的设计步骤………………………………………………………….34
5  升压式DC-DC转换……………………………………………………. . .…………..38
 5.1  DC-DC转换的分类…………………………………………………………………..38
 5.2  DC-DC变换器的工作原理…………………………………………………………..38
5.3  设计步骤……………………………………………………………………………41
6  致谢……………………………………………………………………………………….44
 总结……………………………………………………………………………………… 45
 参考文献……………………………………………………………………………….... 46

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