【可調穩(wen)壓電(dian)(dian)源】可調穩(wen)壓電(dian)(dian)源原理 可調穩(wen)壓電(dian)(dian)源的(de)作用
可調穩壓電源原理
參數穩壓器在(zai)輸入交流(liu)電(dian)(dian)壓150V-260V時,輸出穩壓在(zai)220V效果效好(hao)。低于和(he)高于這個范圍,其效率要(yao)下(xia)(xia)降(jiang)。采用(yong)單片微機進行第一步(bu)控(kong)制,使310V以下(xia)(xia)和(he)90V以上的(de)輸入電(dian)(dian)壓,調整控(kong)制在(zai)190V—250V范圍,再用(yong)參數穩壓器進行穩壓效果很好(hao)。
由市電(dian)輸入(ru)(ru)的(de)交流(liu)(liu)電(dian)壓變化波(bo)動很大,經過(guo)(guo)過(guo)(guo)壓吸(xi)收濾波(bo)電(dian)路將高頻脈沖等(deng)干擾(rao)電(dian)壓濾去后,送入(ru)(ru)直(zhi)流(liu)(liu)開關(guan)穩壓電(dian)源、交流(liu)(liu)取樣電(dian)路和控制執(zhi)行電(dian)路。
直流開關(guan)(guan)穩壓(ya)(ya)電(dian)(dian)源的功(gong)率小,但能把60-320V的交流電(dian)(dian)壓(ya)(ya)孌換成+5V,+12V,-12V的直流電(dian)(dian)壓(ya)(ya)。+5V電(dian)(dian)壓(ya)(ya)供給單片微機使用(yong),±12V電(dian)(dian)壓(ya)(ya)供給控制電(dian)(dian)路(lu)的大功(gong)率開關(guan)(guan)模塊使用(yong)。
單(dan)片微機把取樣電(dian)路(lu)采集(ji)到(dao)的輸入電(dian)壓(ya)(ya)數據,分析(xi)判斷并發出控(kong)制(zhi)信號(hao)送到(dao)觸發電(dian)路(lu),控(kong)制(zhi)調節輸出電(dian)壓(ya)(ya)。
控制執(zhi)行電(dian)路(lu)(lu)由(you)SSR過(guo)零開關(guan)大(da)功率模塊和帶抽頭(tou)的自(zi)耦變(bian)壓(ya)器組成。SSR之間采用RC吸(xi)(xi)收(shou)電(dian)路(lu)(lu)吸(xi)(xi)收(shou)過(guo)電(dian)壓(ya)和過(guo)電(dian)流,使SSR在開關(guan)時不會(hui)損壞。控制執(zhi)行電(dian)路(lu)(lu)把 90-310V的輸(shu)入電(dian)壓(ya)控制在190V-240V范(fan)圍,再(zai)送到參數(shu)穩壓(ya)器進行精確穩壓(ya)。
參數穩(wen)壓(ya)(ya)器(qi)(qi)由(you)電(dian)感和電(dian)容組成LC振(zhen)蕩器(qi)(qi),振(zhen)蕩頻(pin)率50HZ。無(wu)論市電(dian)怎么(me)變化(hua),其振(zhen)蕩頻(pin)率不(bu)會改變,因(yin)此輸(shu)出電(dian)壓(ya)(ya)不(bu)會變化(hua),穩(wen)壓(ya)(ya)精度高。即使(shi)輸(shu)入電(dian)壓(ya)(ya)波(bo)形失真很大,經參數穩(wen)壓(ya)(ya)器(qi)(qi)振(zhen)蕩輸(shu)出后(hou)卻是(shi)標準的正弦波(bo),因(yin)此穩(wen)壓(ya)(ya)電(dian)源(yuan)有強的抗干擾能(neng)力和凈化(hua)能(neng)力。
保(bao)護(hu)告警(jing)電路:當(dang)有(you)危害設備安全情況時,只(zhi)發出(chu)聲光告警(jing),提(ti)示操作人員(yuan)注意采(cai)取措施(shi),而不(bu)用(yong)切斷輸(shu)出(chu)電壓(ya)。在無輸(shu)出(chu)電壓(ya),控制箱(xiang)的溫度過高,市(shi)電輸(shu)入(ru)高過300V,市(shi)電輸(shu)入(ru)低(di)于(yu)130V時都會聲光告警(jing)。當(dang)輸(shu)入(ru)電流(liu)過大(da)時,輸(shu)入(ru)(輸(shu)出(chu))空氣自動(dong)開關自動(dong)跳開。
可調穩壓電源的作用
1、輸(shu)出(chu)(chu)(chu)范(fan)圍(wei):輸(shu)出(chu)(chu)(chu)電(dian)壓(ya)0—1000V、輸(shu)出(chu)(chu)(chu)電(dian)流(liu)0—500A,輸(shu)出(chu)(chu)(chu)功率≤10KW,在此范(fan)圍(wei)內的任意電(dian)壓(ya)、任意電(dian)流(liu)均可(ke)選(xuan)擇
2、穩壓(ya)穩流:電壓(ya)電流值從(cong)零至(zhi)額定值連續可調,穩壓(ya)穩流自動(dong)轉(zhuan)換
3、短(duan)(duan)(duan)路(lu)(lu)保護:允許(xu)在任何(he)工(gong)作狀態下短(duan)(duan)(duan)路(lu)(lu)或(huo)短(duan)(duan)(duan)路(lu)(lu)開機,當輸出短(duan)(duan)(duan)路(lu)(lu)時,電源(yuan)聲光報警,短(duan)(duan)(duan)路(lu)(lu)解除時,恢復正常(chang)工(gong)作
4、過(guo)流保護(hu):電(dian)流保護(hu)值(zhi)(zhi)在額定(ding)值(zhi)(zhi)范圍(wei)內連續(xu)可調,輸出電(dian)流超過(guo)設定(ding)值(zhi)(zhi)時電(dian)源會發(fa)出聲光報警
5、過壓(ya)(ya)(ya)保護:電(dian)(dian)壓(ya)(ya)(ya)保護值(zhi)在額定值(zhi)范圍(wei)內連續可調,直流(liu)穩壓(ya)(ya)(ya)穩流(liu)電(dian)(dian)源輸(shu)出電(dian)(dian)壓(ya)(ya)(ya)超(chao)過電(dian)(dian)壓(ya)(ya)(ya)保護值(zhi)時會發出聲光報警,同時關斷輸(shu)出
6、放(fang)電功能:供容性負載關機放(fang)電用
7、輸出顯示:LED數碼管(guan)顯示,精(jing)確(que)顯示電流電壓值
8、脈(mo)(mo)沖工作:配時間控(kong)制器構成直(zhi)流脈(mo)(mo)沖電源