直流稳压电源论文曾林芳

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1、宜宾学院毕业设计专业：电子工程学生姓名:指导教师：李庆设计题目：直流稳压电源摘要直流稳压电源由于具有效率高、体积小、重量轻的特点，近年来获得了飞速发展。直流稳压电源高频化是其发展的方向，高频化使开关电源小型化，并使直流稳压电源进入更广泛的应用领域，特别是在高新技术领域的应用，推动了高新技术产品的小型化、轻便化。本文主要以半桥变换电路为开关电源的主电路，设计一台品质优良的直流开关稳压电源。直流开关稳压器中所使用的大功率开关器件价格较贵，其控制电路亦比较复朵，另外，开关稳压器的负载一般都是用人量的集成化

2、程度很高的器件安装的电子系统。晶体管和集成器件耐受电、热冲击的能力较差。因而开关稳压器的保护应该兼顾稳压器本身和负载的安全。保护电路的种类很多,这里介绍极性保护、程序保护、过电流保护、过电压保护、欠电压保护以及过热保护等电路。通常选用儿种保护方式加以组合,构成完善的保护系统。直流高压稳压电源的长期稳定性主要受温度的影响，文中分析了直流高压稳压电源的构成原理，建立了温度稳定性的数学模型，给出了精确和可行的定量计算方法，并应用到具体的实例中加以验证，说明了该模型的应用价值，对直流高压稳压电源的设计具有理

3、论指导作用。关键词：稳压器半桥变换电路数学模型应用价值abstractofathesisDeregulatedpowersupplywiththecharacteristicsofhighefficiency,smallvolume,lightweight,obtainedtherapiddevelopmentinrecentyears.Deregulatedpowersupplyhighfrequencyisitsdevelopmentdirection,highfrequency,themini

4、aturizationofswitchpowersupply,deregulatedpowersupplyandtoenterintoawiderrangeofapplicationfields,especiallyinthehighandnewtechnologyinthefieldofapplication,promotedthehigh-techproductsofminiaturization^lightchange.Thisarticlemainlytotransformhalfbridg

5、ecircuitforthemaincircuitofswitchingpowersupply,designahighqualityofderegulatedpowersupplyswitch.Deswitchingvoltagestabilizerusedinhigh-powerswitchingdevicesmoreexpensive,thecontrolcircuitisalsomorecomplex,inaddition，theswitchingvoltagestabilizerloadis

6、usuallywithahighdegreeoflargeintegrateddeviceinstalledelectronicsystems.ThetransistorandtheintegrateddeviceresistanceelectricandthermalshockabilityispoorThusswitchingvoltagestabilizerprotectionshouldtakeintoaccountvoltageregulatoritselfandthesafetyofth

7、eload.Manydifferentkindsofprotectioncircuit,introducedherepolarityprotection,procedureprotection,overcurrentprotection,over-voltageprotection,undervoltageprotectionandoverheatprotectioncircuitUsuallychoosestocombineseveralprotectionmethods,improvethepr

8、otectionofthesystem.Deregulatedpowersupplyhighlong-termstabilityismainlyaffectedbytemperature,thispaperanalysesthecompositionofderegulatedpowersupplyhighprinciple,hasestablishedthemathematicalmodeloftemperaturestability，accurateandfeasi