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1、可调直流稳压电源信院电子系2011-11-7otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestO
2、fficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand摘要可调直流稳压电源由电源变压器,桥式整流电路,滤波器,稳压电路四部分电路组成。城市电网提供的一般为220V(或380V)/50HZ的正弦交流电,电源变压器的作用是将电网交流电压变换成整流滤波电路所需要的交流电压。然后再将其次级输出电压
3、去整流、滤波和稳压,最后得到所需要的直流电压幅值。本次实训通过可调直流稳压电源的设计、安装和调试,要求学会:(1)选择变压器、整流二极管、滤波电容及集成稳压器来设计直流稳压源;(2)掌握直流稳压电路的调试及主要技术指标的测试方法。且输出电压在1.5V-12V范围内连续可调,输出电流最大可达1A;输出纹波电压小于5mV,稳压系数小于3%,输出电阻小于。整个电路采用可调三端集成稳压器W7805和W7905。关键字:变压器,滤波器,稳压块otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDire
4、ctorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypar
5、tyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand一、实验原理(1)实验原理图如下图1所示为整个电路设计的原理框图,220v交流电通过变压器,整流器,滤波器和稳压电路之后,就变可以提供连续可调的直流输入电压。图1原理框图(2)电路原理图下图2为整个电路的原理图。图2电路原理图(3)工作原理城市电网提供的一般为220V(或380V)/50HZ的正弦交流电,电源变压器的作用是将电网交流电压变换成整流滤波电路所需要的交流电压。然后再将其次级输出电压去整流、滤波和稳压,最后得到所
6、需要的直流电压幅值。下图3为变压器符号图。otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOf
7、ficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand图3变压器符号变压器部分参数介绍a)电压比初、次级电压和线圈圈数具有以下关系,即:b)效率在额定功率时,变压器的输出功率和输入功率的比值称为变压器的效率,即:变压器