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Gabaɗaya, halin yanzu da injin ke buƙata a farawa ya fi girma fiye da ƙimar halin yanzu, wanda shine kusan sau 6 na ƙimar halin yanzu.A ƙarƙashin irin wannan halin yanzu, motar za ta sha wahala mafi girma fiye da lokacin da yake aiki akai-akai.Irin wannan tasirin zai ƙara asarar motar, rage rayuwar motar, har ma ya haifar da lalacewa ga wasu sassa a cikin na'ura lokacin da halin yanzu ya yi girma.A karkashin irin wannan yanayi, mutane suna fara mai da hankali ga bincike na farawar motsi mai laushi, suna fatan sa motar ta fara aiki lafiya kuma ta hanyar fasaha masu dangantaka.
1, ka'idar farawa mai taushin motsi
A cikin fasahar da ta gabata, bincike kan farawar taushin motsi shine galibi don sarrafa farawar motar AC asynchronous mai hawa uku, kuma ana samun farawar taushin motar ta amfani da injin AC asynchronous mai hawa uku, wanda ke ba da kariya ga farawa. da tsayawar motar.An yi amfani da wannan fasaha sosai a fagen masana'antu.A cikin masana'antu, an yi amfani da wannan fasaha don maye gurbin farawar Y / △ na al'ada, kuma an sami sakamako mai kyau.
Uku mai juyi parallel thyristor (SCR) na iya daidaita wutar lantarki na mai farawa mai laushi, kuma shine mai sarrafa wutar lantarki na farawa mai laushi.Lokacin da aka haɗa thyristor mai juzu'i uku zuwa kewaye, yana taka rawar haɗin kai tsakanin wutar lantarki da stator na motar.Lokacin da aka danna don farawa, ƙarfin lantarki a cikin thyristor zai tashi a hankali, kuma motar za ta yi sauri a hankali a ƙarƙashin aikin ƙarfin lantarki.Lokacin da saurin gudu ya kai saurin da ake buƙata, thyristor za a kunna gabaɗaya.A wannan lokacin, ƙarfin da aka danna daidai yake da ƙimar ƙarfin lantarki, wanda ba zai iya gane kawai A cikin irin wannan yanayi ba, motar tana gudana kullum a ƙarƙashin kariyar thyristor, wanda ke sa motar ta sha wahala da rashin tasiri, don haka yana da mahimmancin tsawaita rayuwar sabis. na motar da kuma kiyaye motar a cikin kyakkyawan yanayin aiki.

2. Fasahar farawa mai laushi na motar asynchronous
2.1, thyristor AC ƙarfin lantarki daidaita fara taushi
Wutar wutar lantarki ta AC da ke daidaita farawa mai laushi na thyristor galibi yana canza yanayin haɗin thyristor, yana canza yanayin haɗin al'ada zuwa haɗawa zuwa windings uku, don haka fahimtar samar da wutar lantarki zuwa thyristor a layi daya.Thyristor soft Starter yana da ƙarfin daidaitawa, don haka masu amfani za su iya yin gyare-gyare masu dacewa ga motar bisa ga buƙatun su daban-daban, kuma su sanya yanayin farawa na motar ya fi dacewa da bukatun nasu ta hanyar sauye-sauye masu dacewa.

2.2.Daidaita ƙa'idar wutar lantarki mai kashi uku na AC mai daidaita mai farawa
Wutar lantarki mai hawa uku na AC mai daidaita mai farawa mai laushi yana yin cikakken amfani da yanayin lanƙwan ƙarfin AC don fara motar.Tunanin yin amfani da sifa mai siffa ta wutar lantarki ta AC don gane farawar mai taushi kamar wannan shine babban ra'ayi na motsi mai laushi.Yana amfani da nau'i-nau'i na thyristors guda uku a cikin motar don haɗa motar a jere, kuma yana canza lokacin buɗewa ta hanyar sarrafa bugun bugun jini da kusurwa.A wannan yanayin, tashar shigar da motar zata iya adana isasshen ƙarfin lantarki don sarrafa farawar motar.Lokacin da aka kunna motar, ƙarfin lantarki zai zama ƙarfin lantarki mai ƙima, sa'an nan kuma za a haɗa masu tuntuɓar kewayawa guda uku, kuma ana iya haɗa motar zuwa grid.
3. Amfanin farawa mai laushi akan farawa na gargajiya
"Fara mai laushi" ba kawai zai iya rage tasirin farawa na tsarin watsawa da kansa ba kuma ya tsawaita rayuwar sabis na mahimman abubuwan, amma kuma ya rage tasirin tasirin motar da ke farawa a halin yanzu, rage tasirin tasirin thermal akan motar da tasiri. a kan wutar lantarki, don haka ceton makamashin lantarki da kuma tsawaita rayuwar sabis na motar.Bugu da ƙari, ta hanyar amfani da fasahar "farawa mai laushi", za'a iya zaɓar motar da ke da ƙananan ƙarfi a cikin zaɓin motar, don haka rage zuba jari na kayan aiki maras muhimmanci.Farawar tauraro ya dogara da canza wayoyi na iskar motsi, don haka canza ƙarfin lantarki a farawa.An rage ƙarfin wutar lantarki a farawa, yana sa mai farawa ya zama ƙarami, kuma tasirin bas a farawa yana raguwa, ta yadda ƙarfin wutar lantarki na bas a farawa yana cikin kewayon da aka yarda (ana buƙatar haka). digon wutar lantarki na bas bai kamata ya wuce 10% na ƙimar ƙarfin lantarki ba).Hakanan farawa ta atomatik na iya rage halin yanzu a farawa, wanda aka samu ta hanyar canza ƙarfin wutar lantarki na atomatik transformer.
Alal misali, abubuwan da ake buƙata don grid na wutar lantarki a cikin farawa na ƙungiyoyi 4 na 36 kilowatts.Yanayin aiki na yau da kullun na motar 36 kW yana kusan 70A, kuma farawa kai tsaye yana kusan sau 5 na halin yanzu na yau da kullun, wato, halin yanzu da ake buƙata don ƙungiyoyi huɗu na injin 36 kW don farawa a lokaci guda shine 1400A;Abubuwan da ake buƙata don farawa tauraro don grid ɗin wutar lantarki shine sau 2-3 na halin yanzu na yau da kullun da 560-840A na grid na yanzu, amma zai yi tasiri sosai akan ƙarfin lantarki a farkon farawa, wanda yayi daidai da kusan sau 3. al'ada ƙarfin lantarki.Bukatar farawa mai laushi don grid ɗin wutar lantarki kuma shine sau 2-3 na halin yanzu na yau da kullun, wato, 560-840A.Koyaya, tasirin farawa mai laushi akan ƙarfin lantarki shine kusan 10%, wanda a zahiri ba zai sami babban tasiri ba.