Fanka mai hura iska ta centrifugal mai amfani da wutar lantarki ...

Adadi daban-daban na filayen stator da armature da kuma yadda aka haɗa su suna ba da halaye daban-daban na saurin gudu da daidaitawar karfin juyi. Ana iya sarrafa saurin motar DC ta hanyar canza ƙarfin lantarki da aka yi amfani da shi ga armature. Juriya mai canzawa a cikin da'irar armature ko da'irar filin yana ba da damar sarrafa gudu. Motocin DC na zamani galibi ana sarrafa su ta hanyar tsarin lantarki mai ƙarfi waɗanda ke daidaita ƙarfin lantarki ta hanyar "yanke" wutar lantarki ta DC zuwa cikin zagayowar kunnawa da kashewa waɗanda ke da ƙarancin ƙarfin lantarki mai tasiri.

Tunda motar DC mai rauni tana haɓaka mafi girman ƙarfinta a ƙananan gudu, galibi ana amfani da ita a aikace-aikacen jan ƙarfe kamar na'urorin lantarki, da kuma trams. Motar DC ita ce ginshiƙin jan ƙarfe na lantarki a kan motocin lantarki da na diesel-lantarki, motocin titi/trams da na'urorin haƙa lantarki na dizal tsawon shekaru da yawa. Gabatar da injinan DC da tsarin grid na lantarki don gudanar da injina tun daga shekarun 1870 ya fara sabon juyin juya halin masana'antu na biyu. Injinan DC na iya aiki kai tsaye daga batura masu caji, suna ba da ƙarfin motsawa ga motocin lantarki na farko da motocin hybrid na yau da motocin lantarki da kuma tuƙa kayan aiki marasa waya. A yau ana samun injinan DC a aikace-aikace kamar ƙananan kayan wasa da faifai, ko kuma a cikin manyan girma don sarrafa injinan birgima na ƙarfe da injinan takarda. Manyan injinan DC tare da filayen da ke da sha'awa daban-daban galibi ana amfani da su tare da injinan winder don ɗaga ma'adinai, don babban ƙarfin juyi da kuma sarrafa saurin gudu mai santsi ta amfani da injinan thyristor. Waɗannan yanzu an maye gurbinsu da manyan injinan AC tare da injinan mita masu canzawa.