A lokacin aikin birki, asarar da ke cikin motar da asarar kayan aikin inji sun kai kusan kashi 20% na karfin juzu'i.
Don haka, idan karfin birkin da ake buƙata bai kai wannan ƙimar ba, ba a buƙatar resistor na waje. Lokacin da ake amfani da mai sauya mitar (VFD) don ragewa ko rage gaggawar babban nauyin inertia, motar tana aiki a cikin yanayin samar da wutar lantarki kuma tana watsa wutar lantarki zuwa da'irar DC na VFD ta gadar inverter, yana haifar da wutar lantarki ta VFD. tashi.
Lokacin da ya zarce ƙayyadaddun ƙima, mai sauya mitar zai ba da rahoton kuskuren wuce gona da iri (rage yawan wutar lantarki, wuce gona da iri).
Don hana faruwar wannan al'amari, dole ne a zaɓi resistor birki.
ZaɓinResistor na birkijuriya:
Ƙimar juriya na resistor bai kamata ya yi girma da yawa ba. Ƙimar juriya da yawa za ta haifar da rashin isassun ƙarfin birki. Gabaɗaya ya yi ƙasa da ko daidai da ƙimar juriyar juriyar birki daidai da karfin juriyar birki 100%. Juriya na birki bai kamata ya zama ƙanƙanta ba, kuma kada ya zama ƙasa da mafi ƙarancin ƙimar da aka yarda da shi na resistor. Wurin yin birki da yawa na iya lalata ginin birki na inverter.
Zaɓin ƙarfin ƙarfin birki:
Bayan zaɓar ƙimar juriya naResistor na birki, zaɓi ƙarfin juzu'in birki bisa ga ƙimar amfani da birki na 15% da 30%. Ɗaukar 100kg dakatarwa mai cikakken atomatik a matsayin misali, ta amfani da mai sauya mitar 11kW, ƙimar amfani da birki ya kai kusan 15%: Kuna iya zaɓar resistor 62Ω wanda ya dace da "100% ƙarfin birki", sannan zaɓi ƙarfin birki. resistor. Dangane da tebur "100% braking torque" da "15% braking utilization" ƙarfin ƙarfin birki daidai shine 1.7kW, kuma waɗanda aka saba amfani dasu sune 1.5kW ko 2.0kW. A ƙarshe, zaɓi "62Ω, 1.5kW" ko 2.0 kW juriya.
” Domin yin birki cikin sauri, ana iya haɗa “62Ω, 1.5kW braking resistors” guda biyu a layi daya, wanda yayi daidai da “31Ω, 3.0kW birki resistor”.
Duk da haka, ya kamata a lura cewa ƙimar ƙarshe naResistor na birki da aka haɗa tsakanin tashoshin P+ da DB bai kamata ya zama ƙasa da ƙayyadadden ƙimar juriya na 30Ω ba. Amfani da birki: Wannan yana nufin rabon lokacin ƙarƙashin birki zuwa jimlar lokacin aiki. Matsakaicin amfani da birki yana ba da damar naúrar birki da resistor isashen lokaci don watsar da zafin da ake samu yayin birki. Misali, idan injin yana aiki na mintuna 50 kuma yana cikin yanayin birki na mintuna 7.5, ƙimar birkin shine 7.5/50=15%.
Don lokutan da ke buƙatar birki akai-akai, kamar masu bushewa, idan ƙimar birkin ya wuce 15% a cikin tebur, ana buƙatar ƙara ƙarfin juzu'in birki daidai gwargwadon yanayin aiki. Fata wannan fassarar ta taimaka muku!
