- 25
- Oct
Gabatar da hanyoyin auna DC da AC na juriya na cikin baturi
A halin yanzu, hanyar auna ƙarfin juriya na baturi galibi ana amfani da shi a masana’antar. A aikace -aikacen masana’antu, ana auna daidaitaccen ma’aunin juriya na cikin baturi ta kayan aiki na musamman. Bari in yi magana game da hanyar auna ƙarfin juriya na baturi da ake amfani da shi a masana’antu. A halin yanzu, akwai manyan hanyoyi guda biyu don auna juriya na ciki a cikin masana’antar:
1. DC fitar da hanyar auna ma’aunin juriya na ciki
Dangane da tsarin jiki r = u/I, kayan aikin gwajin suna tilasta baturi ya wuce babban DC a cikin ɗan gajeren lokaci (gabaɗaya 2-3 seconds) (a halin yanzu ana amfani da babban halin yanzu na 40a-80a) , kuma ana auna ƙarfin lantarki a kan batirin a wannan lokacin, Kuma ƙididdige juriya na ciki na yanzu na baturin bisa ga dabara.
Wannan hanyar auna yana da madaidaicin madaidaici. Idan an sarrafa shi da kyau, ana iya sarrafa kuskuren ma’aunin a tsakanin 0.1%.
Amma wannan hanyar tana da hasara a bayyane:
(1) Ana iya auna manyan batura ko masu tara ruwa. Ba za a iya ɗora ƙananan baturan da ke da ƙarfin 40A zuwa 80A a cikin sakan 2 zuwa 3 ba;
(2) Lokacin da batirin ya wuce babban ruwa mai gudana, wayoyin lantarki da ke cikin baturin za su yi taɓarɓarewa, kuma rarrabuwar kai za ta kasance mai mahimmanci, kuma juriya za ta bayyana. Sabili da haka, lokacin aunawa dole ne ya takaice sosai, in ba haka ba ƙimar juriya na cikin gida da aka auna zai sami babban kuskure;
(3) Babban ƙarfin wucewa ta cikin baturin zai lalata wayoyin lantarki na baturin zuwa wani gwargwado.
2. Matsalar AC ta sauke ma’aunin juriya na ciki
Tunda ainihin batirin yayi daidai da mai tsayayya da aiki, muna amfani da madaidaicin mitar da madaidaicin baturi (a halin yanzu ana amfani da mitar 1kHz da ƙaramin ƙarfin 50mA), sannan samfurin samfurin ƙarfin sa, bayan jerin sarrafawa kamar gyara da tacewa, Yi lissafin juriya na ciki na baturi ta hanyar da’irar amplifier ta aiki. Lokacin auna ƙarfin baturi na AC ƙarfin juji na hanyar auna ma’aunin juriya na ɗan gajere ne, gabaɗaya kusan 100ms. Daidaiton wannan hanyar aunawa shima yana da kyau, kuma kuskuren daidaiton auna gabaɗaya tsakanin 1%-2%.
Ab advantagesbuwan amfãni da rashin amfanin wannan hanyar:
(1) Kusan dukkan batura, gami da ƙananan batura masu ƙarfi, ana iya auna su ta hanyar AC ƙarfin jujjuyawar hanyar auna juriya. Galibi ana amfani da wannan hanyar don auna juriya na ciki na ƙwayoyin batirin rubutu.
(2) Daidaitaccen ma’aunin hanyar auna saurin jujjuyawar AC yana sauƙaƙa shafar halin yanzu, kuma akwai yiwuwar kutse na yanzu. Wannan gwaji ne na ikon hana tsangwama na da’irar ma’aunin ma’auni.
(3) Wannan hanyar ba za ta lalata batirin kanta ba.
(4) Daidaitaccen hanyar auna ƙarfin jujjuyawar AC yana ƙasa da na DC ma’aunin ma’aunin juriya na ciki.