Mai farawa mai laushisabuwar na'urar sarrafa motar ce wacce ke haɗa farawar taushin motsi, tsayawa mai laushi, adana makamashi mai nauyi da ayyukan kariya da yawa.Babban abin da ya ƙunsa ta hanyar juzu'i uku masu daidaitawa thyristors da da'irar sarrafa lantarki da aka haɗa cikin jeri tsakanin wutar lantarki da injin sarrafawa.Yi amfani da hanyoyi daban-daban don sarrafa kusurwar gudanarwa na thyristors masu layi daya mai matakai uku domin shigar da wutar lantarki na injin da aka sarrafa ya canza bisa ga buƙatu daban-daban, kuma ana iya aiwatar da ayyuka daban-daban.

Tare da haɓaka aikace-aikacen manyan motoci (5000kW ~ 60000kW) a cikinmanyan kamfanoni da kayan aiki, hanyar farawa na manyan motoci yana daan ƙara jawo hankali.Saboda ƙarancin aikin na'urar farawa na ruwa ba zai iya cika buƙatun farawa na manyan motoci masu ƙarfi ba, aikace-aikacen nau'in nau'in thyristor (jihar mai ƙarfi) na'urar farawa mai laushi ya fara haɓaka.Sannan ana amfani da na'urori masu laushi masu taushi irin na masu canzawa da na'urori masu motsi na maganadisu (masu sarrafa maganadisu).A halin yanzu, ana amfani da na'urorin farawa na ruwa mafi yawa a cikin ƙananan motoci (a ƙarƙashin 5000kW).Kuma jerin thyristormai laushi mai farawaAna amfani da mafi yawa a cikin babban motar lantarki (fiye da 5000KW).