山东11选5走势图

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雙極性輸出的大功率壓控恒流源的設計方法
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雙極性輸出的大功率壓控恒流源的設計方法

ZUOZHE:admin   FABURIQI:2019-04-17 00:44   XINXILAIYUAN:http://yyyyee.com/

摘要:本文介紹了一種雙極性輸出的大功率壓控恒流源山东11选5走势图的設計方法。該恒流源采用簡單的運放系統,經過電壓擴展和電流擴展,可提供25V、0~2A的可調恒定電流,既達到了提供大輸出電流的目的,而且電路結構簡單,成本較低,精度較高。經測試該恒流源有較高的負載穩定度和較低的紋波。

0 YINYAN

山东11选5走势图 ZAIDIANZIYIQISHEBEIZHONGJINGCHANGYAOYONGDAOYAKONGDIANLIUYUAN,BINGQIEYAOQIUZAIFUZAIBIANHUASHIJUYOUHENHAODEWENDINGXING。CHUANTONGDEHENGLIUYUANZHIZUOFANGFAKEYISHILIYONGERJIGUAN、SANJIGUAN、JICHENGWENYAYUANDETEXINGZHIZUODECANSHUWENLIUQI、CHUANLIANFANKUIDIAOZHENGXINGWENLIUDIANYUAN、KAIGUANWENLIUYUANDENGDENG。CANSHUWENLIUQIDESHUCHUDIANLIUFANWEIXIAO、WENLIUJINGDUBUGAO; CHUANLIANFANKUIDIAOZHENGXINGWENLIUDIANYUANDESHUCHUDIANLIUXIAO,XIAOLVJIAODI;KAIGUANWENLIUYUANBUJINDIANLUFUZA、YUANQIJIANSHULIANGDUO,ERQIESHUCHUWENBODA、KEKAOXINGJIAOCHA。KAOLVDAOYISHANGQUEDIAN,BENSHEJICAIYONGLEPUTONGDEYUNFANG,PEIHESANJIGUANJINXINGDIANYAKUOZHANHEDIANLIUKUOZHAN,JIDADAOLETIGONGDASHUCHUDIANLIUDEMUDE,ERQIEDIANLUJIEGOUJIANDAN,CHENGBENJIAODI,JINGDUJIAOGAO。

1 DIANLUSHEJI

TU1SHIBENSHEJIDEYUANLIKUANGTU, YOUWAIBUDEKONGZHIDIANYAXINHAOSHURUDAOYUNFANGGOUCHENGDEHENGLIUMOKUAIZHONG。SHUCHUDEDIANLIUJINGDIANYAKUOZHANMOKUAIHEDIANLIUKUOZHANMOKUAIHOUTIGONGGEIFUZAI。DIANLIUJINGGUOCAIYANGDIANZUJINXINGDIANLIUCAIYANG,HUODEDECAIYANGXINHAOJINGYOUDIANYAFANKUIXITONGMOKUAIFANKUIDAOHENGLIUMOKUAIZHONGJINXINGHENGLIU。QIZHONGYOUGONGLVMOKUAIDUIDIANYAKUOZHANMOKUAIHEDIANLIUKUOZHANMOKUAIJINXINGGONGDIAN。

圖1 設計原理圖

(1) GONGLVMOKUAI。

山东11选5走势图 XUANZESHIMIANSHANGCHANGYONGDEKAIGUANDIANYUANDUIDIANLIUKUOZHANMOKUAITIGONGGONGLVSHUCHU,ZAIQISHUCHUDUANBINGJIEDIANRONGYIXIAOCHUGANRAO。YOUYUYAOQIUSHUANGJIXINGSHUCHU,SUOYIXUANYONGSHUANGJIXINGSHUCHUDEKAIGUANDIANYUANKEJIEYUECHENGBENBINGJIANXIAOTIJI。ZAISHIYANZHONG,WOMENSHIYONGBIAOCHENGWENBOWEI1%DEKAIGUANDIANYUAN。SHIYONG78、79XILIESANDUANWENYAQIJIANGYAHOUTIGONGGEIDIANYAKUOZHANMOKUAIYITIGAOYUNFANGDESHUCHUDIANYA。

(2) YUNFANGHENGLIUJIDIANYAFANKUIMOKUAI。

山东11选5走势图 TU2SHIYUNFANGHENGLIUMOKUAIJIDIANYAFANKUIMOKUAI。YOUTU2KEJIANYOUDIANLIUSHUCHUDUANCAIJIDAODEJINGFENYACHULIHOUDECAIYANGFANKUIXINHAOJINGYOUYUNFANGZUCHENGDEGENSUIQIJIFANXIANGQIHOU,BEISONGDAOFANXIANGJIAFAQIU4DEFANXIANGDUANYUDIANYAKONGZHIXINHAOXIANGJIADEDAOYUNFANGDESHUCHUDIANYAV3.V3JISUANGONGSHIWEI:

SHIZHONGm=1+R22/R23。

圖2 恒流及電壓反饋模塊

 

(3) DIANYAKUOZHANJIDIANLIUKUOZHANMOKUAI。

山东11选5走势图 TU3SUOSHISHIDIANYAKUOZHANMOKUAIDIANLUTU。YOUYUNFANGGOUCHENGCHADONGFANGDAQI,JIANGHENGLIUXITONGSHENGCHENGDEXINHAOYUFENYACHULIHOUDESHUCHUDIANYAJINXINGBIJIAOFANGDA,XINGCHENGZUIHOUDESHUCHUDIANYA。XITONGZHONGDESANJIGUANXUANZEDUIGUAN,YIDADAOSHUANGJIXINGSHUCHUDEMUDE,CIXITONGKAIHUANFANGDABEISHUJINYOUR17YUR14DEBIZHIJUEDING, DANJINGR25HER24FENYAFANKUIHOU,XIANGDANGYUFANGDAQI,QIFANGDABEISHUYOUR25YUR24DEBIZHIJUEDING。

圖3 電壓擴展模塊

山东11选5走势图 TU4SUOSHIWEIDIANLIUKUOZHANDIANLU。SHIYONGJIANDANCHANGYONGDETUTENGZHUSHIDIANLIUKUOZHANFANGFA,ZHUYIGONGLVSANJIGUANDEXUANZE,BINGJIASHANGSANREPIAN,BAOZHENGGONGLVSHUCHU。ZHEYANG,JINGGUODIANLIUKUOZHANHOUV1JISUANGONGSHIWEI:

SHIZHONGn=1+R25/R24.

TU4ZHONGDERsWEICAIYANGDIANZU,ZAIDIANLIUYUANDIANLUZHONG,QUYANGDIANZUDEJINGMICHENGDUZHIJIEYINGXIANGDIANLIUSHUCHUDEWENDINGXING。ZAISHIYANZHONG,WOMENSHIYONGWENPIAOXIAOYU5×10-6/℃ 、EDINGGONGLVWEI10WDE2ΩJINGMIJINSHUMODIANZU。FENBIECONGCAIYANGDIANZUDELIANGDUANDUIDIANYACAIYANG,ZHEYANGTONGGUOCAIYANGDIANZUDEDIANLIUIWEI:

山东11选5走势图 YOUYISHANGDIANLUFENXISHI(1)、(2)DE:

DIAOZHENGR22、R23、R24、R25DEDIANZUZHI,SHIm=n=l.SHIYANZHONGXUANZEl=4,ZE:

DECHUTONGGUOCAIYANGDIANZUDEDIANLIUJINYUSHURUDEKONGZHIDIANYAYOUGUAN,ZEKEDEZHIZHENGGEDIANLUDADAOKEKONGHENGLIUDEXIAOGUO。

圖4 電流擴展模塊

2 SHIYANCELIANGJIEGUO

SHIYANZHONGWOMENSHIYONGPUTONGDIANYAYUANZUOWEIKONGZHIXINHAODESHURU, SHIYONGDAGONGLVDE50ΩKEBIANDIANZUPANZUOWEIMONIFUZAI,JINGCELIANG,BENHENGLIUYUANDESHUCHUDIANLIUWENBOYUEWEI0.8%.QIZHUYAOYINGXIANGWENBODEYUANYINWEIKONGZHIXINHAODEWENDINGDU,RUSHIYONGGENGHAOJINGDUDESHUZIDIANYAXINHAOZEHUIYOUGENGGAODESHUCHUJINGDU。TU5SHIZAIDIANLIUWEI1ASHIBENZHUANGZHIDEFUZAIDIANLIUWENDINGDUQUXIAN, KEFAXIANHENGLIUXIAOGUOHENHAO。YOUYUSHIYONG36VDEDIANYUANTIGONGGONGLVSHUCHU,DANGFUZAIDIANZUDAYU30ΩSHIDIANLIUKAISHIYOUSHUAIJIAN。

圖5 負載電流穩定度

3 JIELUN

山东11选5走势图 BENSHEJICAIYONGJIANDANDEYUNFANGJISANJIGUANHENGLIUDIANLUZHIZUOLEYIZHONGDIANLUJIANDAN、YOUJIAOGAOFUZAIDIANLIUWENDINGDUHEJIAODIWENBODEHENGLIUYUAN。DUTEDEDIANYAKUOZHANDIANLUHEDIANLIUKUOZHANDIANLUSHIXIANLESHIYONGPUTONGYUNFANGDEDAGONGLVSHUCHU,KEFULEPUTONGYUNFANGDIANLUSHUCHUGONGLVDIDERUODIAN。BINGSHIYONGDUICHENGJIEGOUSHIXIANLETONGYIDIANYUANDESHUANGJIXINGSHUCHU。RUSHIYONGSHUZIKONGZHIXINHAOZUOWEIDIANLIUKONGZHIXINHAOZEKESHIXIANSHUCHUDIANLIUDESHUZIKONGZHI。

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