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稳压器不稳压原因有哪些

作者: 来源: 日期:2014-10-21 13:51:12 人气:917

1.电压偏高需要降压

 电脑昆山稳压器的输出稳压精度设定为± 4%,当输出电压刚好等于220V时,调整电位器RP使电压比较器A1.2的反相输入端{6}脚所接的基准 电压与其同相输入端{5}脚连接的取样电压也刚好相等,这样输出电压若有升高(可能因为输入电压升高,或负 载电流减小),取样电压也相应升高,电压比较器A1.2的输出端{7}脚电位就必然为高,三极管Q1导通, 继电器J1吸合,电动机M得电转动,拖动调压变压器的碳刷滑动,直至电脑稳压器的输出电压回落到220V 为止。电动机绕组的供电回路是:DC12V→J1常开接点→限位开关XK1→电动机M→XK2→J2常闭 接点→地。
 
2.过压保护电路

YOUJICHENGDIANLUA1.1JIWAIWEIDIANLUZUCHENG。DANGDIANYA PIANGAOJIAODUO,JINGDIANDONGJITUODONGTANSHUADIAOZHENGDAOJIXIANWEIZHI(ZHEISHIYINXIANWEIKAIGUANXK1DONGZUO,DIANDONGJITINGZHIZHUANDONG),SHUCHUDIANYARENGRAN DADAOHUOCHAOGUO220VDE1.1BEISHI,DIANYABIJIAOQIA1.1DESHUCHUDUAN{1}JIAOBIANWEIGAODIANPING,JINGERJIGUAND1SHISANJIGUANQ 5DAOTONG,DIANRONGQIC7XUNSUFANGDIAN,DIANYABIJIAOQIA2SHUCHUDUAN{1}JIAODIANWEIZHUANDI,JIDIANQIJ3SHIFANG,QIEDUANDIANNAOWENYAQIDEDIAN YASHUCHU,BAOHULEYONGDIANSHEBEI。GUOYABAOHUHOUFAGUANGGUANLED1DIANLIANG,ZHISHIDUANDIANSHIYOUGUOYASUOZHI。 

3.欠压保护电路

YOUJICHENGDIANLUA1.4JISANJIGUANQ3、Q4DENGYUANJIANZUCHENG。RUODIANYAPIANDIBINGJINGDIAOYABIANYAQIZUOZUIDAXIANDUDIDIAOZHENG,SHUCHUDIANYA RENGDIYU220VDE0.9BEISHI,DIANYABIJIAOQIA1.4DESHUCHUDUAN{14}JIAOYOUDIBIANGAO,JINGDIANZUR20HEDIANRONGQIC4CHONGDIAN HUILUZUODUANSHIJIANYANSHIHOU,SANJIGUANQ3BAOHE,Q4JIEZHI,Q4JIDIANJIDEGAODIANWEIJINGERJIGUAND3SHIQ5BAOHEDAOTONG,ZUIZHONGDAO ZHIJIDIANQIJ3SHIFANG,DIANNAOWENYAQISHUCHUDUANDUANDIAN。QIANYASHIFAGUANGGUANLED3DIANLIANG,ZHISHIDANGQIANCHUYUQIANYAZHUANGTAI。RUGUOYONGDIANSHE BEIYUNXUQIANYAYUNXINGDEHUA,KEQUDIAOERJIGUAND3,ZHEIYANGQIANYASHIZHIYOUFAGUANGGUANZHISHIERBUDUANDIAN。

4.取样电压与基准电压

DIAOYABIANYAQITYOULIANGGEERCIRAOZU,QIZHONGYIZU9VJINGDQ1QIAOSHIZHENGLIUHOU,ZAIJINGDIANZUR2HER3FENYA,QUR3SHANGDEFENYAZHIZUOWEIJIAO LIUWENYAQISHUCHUDIANYAGAODIDEQUYANGDIANYA。16VDERAOZUDIANYAJINGDQ2QIAOSHIZHENGLIU,SANDUANWENYAQILM7812WENYA,SHUCHU WENDINGDEDC12VDIANYAXIANGKONGZHIDIANLUGONGDIAN。FAGUANGGUANLED2DIANLIANGBIAOZHIZHEDC12VDIANYUANGONGZUOZHENGCHANG。JICHENGDIANLUA1SHI SIYUNFANGHA17324,ZAIZHEILIZUOSIDIANYABIJIAOQISHIYONG。DC12VDIANYAJINGDIANWEIQIRP、DIANZUR4~R8FENYA,GONG QUCHUSIGEFENYAZHIZUOWEIJIZHUNDIANYA,FENBIESONGWANGSIGEDIANYABIJIAOQIDEXIANGYINGSHURUDUAN。DIANZUR3SHANGDEQUYANGDIANYAYETONGSHISONGWANGDIANYA BIJIAOQIDESHURUDUAN。QUYANGDIANYAHEJIZHUNDIANYAJIERUDIANYABIJIAOQISHURUDUANDEGUILVSHI:JIANCEDIANNAOWENYAQISHUCHUDIANYASHIFOUGAOYUEDING ZHI220V,QIZHENGSHURUDUANJIEQUYANGDIANYA,FUSHURUDUANJIEJIZHUNDIANYA,LIRUA1.1HEA1.2;JIANCEDIANNAOWENYAQISHUCHUDIAN YASHIFOUDIYUEDINGZHI220V,JIEFAYUSHANGXIANGFAN,LIRUA1.3HEA1.4。RENSHIZHEIZHONGGUILVDUIDUDONGXUDUOPINPAIJIAOLIUWENYA QIDEDIANLUYUANLITUDOUYOUCANKAOYIYI,DANZHEIZHONGJIERUGUILVDEQIANTISHI:JIANCEJIEGUOWEI“SHI”SHI,DIANYABIJIAOQIDESHUCHUDUANWEIGAODIANPING ,ZHEIQIAHAOSHIXIANGGUANGONGNENGDIANLUSUOXUYAODE。

5. 开机延时送电控制

ZHEIBUFENDIANLUYOUJICHENGDIANLUA2JIQIWAIWEIYUANJIANZUCHENG。A2SHIXINGHAOWEIHA17358DESHUANGYUNFANG,CI CHUJIANGYUNFANGGAIZUODIANYABIJIAOQISHIYONG。DIANYABIJIAOQIDEFANXIANGSHURUDUAN{2}JIAOJIEYOUYOUDIANZUR27HER29FENYATIGONGDEJIZHUNDIANYA ,TONGXIANGSHURUDUAN{3}JIAOJIEDESHIDIANZUR25HEDIANRONGC7ZUCHENGDECHONGDIANHUILU。GANGTONGDIANSHISANJIGUANQ5JIEZHI,C7CONG0KAISHICHONG DIAN,ZAIC7SHANGDECHONGDIANDIANYADADAO{2}JIAOJIZHUNDIANYAZHIQIAN,A2DESHUCHUDUAN{1}JIAOWEIDIDIANPING;DANGC7SHANGDIANYADADAOHUOCHAOGUO{2} JIAODIANYASHI,{1}JIAODIANWEIBIANGAO,SANJIGUANQ6DAOTONG,JIDIANQIJ3XIHE,QICHANGKAIJIEDIANBIHE,DIAOYABIANYAQIDE220VDIANYA JINGJ3JIEDIANSONGWANGDIANNAOWENYAQIDESHUCHUDUAN,ZHICI,KAIJIYANSHIJIESHU。ZHEIGEGUOCHENGDAYUEXUYAO5FENZHONG。KAIJIYANSHISONGDIANZHUYAOSHIWEI LEBAOHUKONGDIAO、DIANBINGXIANGDENGSHEBEIDEYONGDIANANQUAN,RUOWUCIXUQIU,KEANXIAKUAIQIZISUOANNIUAN,CISHIKAIJIYANSHISHIJIANJIANGSUODUANWEI2 ~3MIAOZHONG,ZHEISHIYINWEIYOUZUZHIJIN10kΩDEDIANZUR26XIANGDIANRONGC7CHONGDIAN,QICHONGDIANSHIJIANCHANGSHUYIMINGXIANJIANXIAO。KAIJIYANSHIQI JIANFAGUANGGUANLED4DIANLIANG,ZHISHIDANGQIANGONGZUOZHUANGTAI。DIANNAOWENYAQITONGDIANGONGZUOQIJIANRUOYUTINGDIAN,DIANRONGQIC7HUIJINGERJIGUAND2XUN SUFANGDIAN,YIBAOZHENGJIBIANDUANSHIJIANTINGDIANHOUYOUHUIFUSONGDIAN,C7YEZHONGXINCONG0KAISHICHONGDIAN,DIANNAOWENYAQIDESHUCHUDUANXUZAIJINGYANSHICAINENG WANGWAISONGDIAN,CONGERBAOZHENGYONGDIANSHEBEIDEANQUAN。

6.电压偏低需要升压

若因输入电压降低等原因引起输出电压低于220V,电压比较器A 1.3的输出端{8}脚电位变高,之后三极管Q2导通,继电器J2吸合,电动机M得电转动,但这时电动机绕 组上的电压极性与上次相反,其回路是:DC12V→继电器J2常开接点→限位开关XK2→电动机M→XK 1→J1常闭接点→地,电动机反向旋转,直至输出电压回升到220V为止。  限位开关XK1和XK2安 装在调压变压器上碳刷允许旋转范围的极限端位置,若因输入电压偏高或偏低较多,电动机拖动碳刷转至极限位 置仍不能使输出电压回到220V,碳刷架将触及限位开关,电动机断电停转,以免电动机过载损坏。

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