I-AC (i-alternating current) kunye ne-DC (i-direct current) iinjini ziintlobo ezimbini eziqhelekileyo zeenjini zombane ezisetyenziswa kwizicelo ezahlukeneyo. Ngelixa zombini iindidi zeenjini zisebenza injongo enye yokuguqula amandla ombane abe ngamandla oomatshini, zisebenza ngokwemigaqo eyahlukeneyo kwaye zineempawu ezahlukileyo.
Omnye umahluko ophambili phakathi kweenjini ze-AC kunye ne-DC ilele kuhlobo lwangoku abalusebenzisayo. Iinjini ze-AC zenzelwe ukuba zisebenze ngokutshintshana okwangoku, okuthetha ukuba isalathiso sotshintsho lwangoku ngamaxesha athile. Ngakolunye uhlangothi, iimoto ze-DC zinikwe amandla ngokuthe ngqo, apho ukuhamba kwentlawulo yombane ku-unidirectional.
Olunye ulwahlulo oluphambili yindlela eveliswa ngayo amandla kazibuthe kwiinjini. Kwiimotor ze-AC, umhlaba wemagnethi uveliswa ngumbane otshintshayo oqukuqelayo kwi-stator windings, ebangela umhlaba ojikelezayo wemagnethi. Le ntsimi yamagnetic ejikelezayo isebenzisana ne-rotor ukuvelisa intshukumo. Ngokwahlukileyo, iimoto ze-DC zixhomekeke kwimagnethi esisigxina okanye intsimi ye-electromagnetic eyenziwe ngumbane othe ngqo ukuvelisa amandla ombane ofunekayo wokujikeleza.
Indlela yokulawula isantya nayo iyahluka phakathi kweenjini ze-AC kunye ne-DC. Iinjini ze-AC zihlala zixhomekeke kulawulo lwamaza ukuze zilungelelanise isantya, nto leyo ebandakanya ukutshintsha ukuphindaphindwa kwamandla okufaka. Ngokwahlukileyo, iinjini zeDC zibonelela ngolawulo oluthe ngqo ngakumbi lwesantya ngokusetyenziswa kwegalelo lombane.
Ubuchule kunye neemfuno zokugcinwa zizinto ezongezelelweyo ezibeka i-AC kunye ne-DC motors. Iinjini ze-AC zisebenza ngokufanelekileyo kwaye zifuna ukugcinwa okuncinci ngenxa yokungabikho kweebhrashi kunye nee-commutators, ezingamacandelo aqhelekileyo kwiinjini ze-DC. Nangona kunjalo, iinjini zeDC ziyaziwa ngokulula kwazo kunye nokulula kolawulo lwesantya.
Isishwankathelo, umahluko ophambili phakathi kweenjini ze-AC kunye ne-DC zivela kuhlobo lwangoku abalusebenzisayo, indlela yokuvelisa intsimi yemagnethi, iindlela zokulawula isantya, kunye nokusebenza kwazo ngokufanelekileyo kunye neemfuno zolondolozo. Ukuwuqonda lo mahluko kubalulekile ekukhetheni eyona moto ifanelekileyo kwii-specs, njengoko uhlobo ngalunye lunoncedo kunye nemida yalo.