Shaft current shine hacker na tsarin ɗaukar hoto nasamfurin mota kashi uku, kuma da zarar an samar da shaft current, hakan zai sa na’urar daukar mashin din ta fadi cikin kankanin lokaci. Dangane da yanayin da ake buƙata na ƙarni na yanzu, ƙarfin lantarki da kewaye, kewayawa ya bambanta da kewayawa mai sauƙi, babu ingantacciyar layi mai haske, yana da wahala a auna halin yanzu, don haka mafi maƙasudi da yuwuwar ganowa shine gano ƙarfin shaft.
Domin daban-dabanSamfuran induction na zamani na 3da tsarin tsarin ɗaukar nauyi, bambance-bambancen juriya a cikin kewayawa kaɗan ne, kuma mafi girman tasiri shine ƙarfin shaft ɗin daidai da na'urori daban-daban, lokacin da ƙarfin wutar lantarki ya kai wani ƙima (yawanci 300-500mV), zai haifar da rushewar fim ɗin mai na tsarin ɗaukar hoto, kuma ya samar da babban ƙarfin shaft na yanzu. Wutar lantarki tana nufin ƙarfin lantarki da aka samar tsakanin ƙarshen mashin ɗin motar ko tsakanin madaidaicin juyi da wurin zama. Yana faruwa ne sakamakon rashin daidaituwar da'irar maganadisu da ke kewayen mashin motar. Wannan juzu'in maganadisu mara daidaituwa yana yanke juzu'in jujjuyawar kuma yana haifar da ƙarfin wutar lantarki a ƙarshen shaft ɗin.
A ƙarƙashin yanayi na al'ada, fim ɗin mai mai lubricating tsakanin shaft da ɗaukar hoto yana taka rawar kariya. Lokacin da ƙarfin wutar lantarki ya ƙaru zuwa wani ƙima, musamman lokacin da motar ta fara, fim ɗin mai mai mai ba a samar da shi sosai ba, ƙarfin wutar lantarki zai rushe fim ɗin mai don samar da madauki, yana samar da madaidaicin shaft, wani lokacin har zuwa ɗari zuwa dubban amps. Dangane da girman irin ƙarfin lantarki na shaft, ana iya auna shi da mita millivolt (wanda ake kira babban juriya voltmeter). Daga nazarin rarrabawar jiki na sassan jiki, motar motar da kuma gidaje suna ɓoye ta hanyar man shafawa a cikin ma'auni, lokacin da ƙarfin wutar lantarki ya kasance, wato, akwai yuwuwar bambance-bambance a duka ƙarshen motar motar. Lokacin da injin ya sami kuzari, ana iya auna shi kai tsaye ta hanyar auna ma'aunin voltmeter, wato, ɗaya daga cikin binciken yana cikin hulɗa mai ƙarfi tare da shaft (saboda shaft ɗin yana cikin yanayin jujjuyawar), amma ku guje wa maɓalli na hanya don hana haɗari; Sauran binciken na voltmeter ya kamata ya kasance cikin kyakkyawar hulɗa tare da mahallin motar, wato, ya zama dole don kauce wa matsayi tare da fenti, kuma tabbatar da cewa motar motar tana da kyau.
Yawancin tsarin ɗaukar nauyi na babban ƙarfin lantarkiuku mataki Motorskuma masu motsi masu canzawa sun ɗauki matakan da suka dace don shaft current, amma wannan baya shafar gano ƙarfin shaft.