数控直流电流源设计(1).doc

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1、摘要在电子设备中经常用到稳定性好、精度高、输出可预置的直流电流源。随着电子技术的不断进步，对电子仪器的要求也不断提高。电源作为电路的动力源泉更是扮演着越来越重要的角色，不论是学校实验室还是维修中心都离不开实验电流源，然而传统的电流源不论是在控制精度还是输出特性上都无法满足要求。该电流源具有设定准确、输出电流稳定、可调范围全程线性等特点。随着单片机技术的不断发展和D/A，A/D技术的不断成熟使得数控电源成为可能，数控电流源不论是在控制精度还是在可操作性上都有传统电源无法比拟的优势。此设计在参考传统电流源

2、以及普通数控电流源的基础上，在充分考虑性价比的同时极大地提高了数控电流源的准确性，通过软件修正以后在使用普通元件的情况下数控电流源的性能也达到了比较高的水平。关键字：高精度；D/A转换；电流源；软件修正IVDCCurrentSourceDesignNC朗读显示对应的拉丁字符的拼音Abstract:Oftenusedinelectronicequipmentingoodstability,highaccuracy,outputpresetdccurrentsource.Progressunremitti

3、nglytherequesttotheelectronicsinstrumenttechnicallytoalsoraisecontinuouslyalongwiththeelectronics,thepowersupplyisthemotivesourceoftheelectriccircuittoplayamoreandmoreimportantrolemore,istheschoolalaboratorystillrepaircentersestoallcannotgetawayfromanex

4、perimentpowersupplyinspiteof,howeverthetraditionalpowersupplyiscontrolaccuracyoroutputthetopsofthecharacteristicinspiteofandcan'tsatisfyarequest.Thisdirectcurrentsourcenotonlycansteadilyoutput,butalsocanbeaccuratelyinitialized,andadjustedlinearlyatawide

5、range.AlongwithsingleslicemachinetechnicalofdevelopcontinuouslywiththeD/A,theA/Distechnicalcontinuouslythematuritymakethenumbercontrolpowersupplytomakepossible,counttocontroltheelectriccurrentsourceandiscontrolaccuracyinspiteofstillonthemaneuverabilitya

6、llthereistraditionalpowersupplycan'tcomparetoofadvantage.Thisdesigninmakingreferencetothefoundationthatthetraditionalelectriccurrentsourceandcommonnumbercontroltheelectriccurrentsource,atthefullconsiderationpricecompareofinthemeantimeraisedanumbertocont

7、roltheaccuracyoftheelectriccurrentsourcebiggest,passthesoftwarecorrectionhereafterwhileusethecircumstanceofthecommoncomponentthenumbercontrolstheelectriccurrentsourceofthefunctionalsocomestoahigherlevel.Keywords:Highaccuracy；D/Aconverter；currentresource

8、；SoftwarecorrectionIV目录摘要I1.绪论51.1.电流源简介51.2.数控电流源的研究意义51.3.数控电流源技术的发展52.数控电流源硬件系统总体设计62.1.传统电流源的设计方案62.2.数控电流源方案62.3.数控电流源的方案比较72.4.电流源的软件系统组成82.5.本系统的特点83.数控电流源硬件模块设计93.1.电源模块93.1.1.电源原理93.1.2.电源方案确定103.1.3.电源模块具体电路103.1.4.电源模块