Idan aka kwatanta da motar DC da motar asynchronous, manyan halayen fasaha na motar Brushless DC sune:

1. Ana samun halayen aiki na motar DC ta hanyar sarrafa lantarki. Yana da ingantaccen sarrafawa da kewayon gudu mai faɗi.

2. Ana buƙatar bayanai game da ra'ayoyin matsayi na Rotor da direban inverter mai matakai da yawa na lantarki.

3. A takaice dai, injin AC zai iya aiki da sauri ba tare da walƙiya ko goge goga da na'urar commutator ba. Yana da aminci mai yawa, tsawon rai kuma ba ya buƙatar gyara.

4. Motar DC mara gogewa tana da ƙarfin lantarki mai yawa, babu asarar rotor da zafi, kuma ingantaccen aiki: idan aka kwatanta da bayanai, ingancin motar asynchronous mai ƙarfin 7.5 kW shine 86.4%, kuma ingancin motar DC mara gogewa mai ƙarfin iri ɗaya zai iya kaiwa 92.4%.

5. Dole ne a sami sassan sarrafa lantarki, jimlar kuɗin ya fi na injin DC.

Akwai nau'ikan injina guda biyu da ake amfani da su a tsarin AC: motar induction da motar magnet synchronous ta dindindin. Ana iya raba motar magnet synchronous ta dindindin zuwa sinusoidal back EMF permanent magnet synchronous motor (PMSM) da kuma square wave back EMF brushless DC motor (BLDCM) bisa ga ka'idar aiki daban-daban. Don haka yanayin tuƙi da yanayin sarrafawa sun bambanta.

EMF na baya na injin synchronous na sinusoidal permanent magnet synchronous shine sinusoidal. Domin injin ya samar da juyi mai santsi, dole ne wutar da ke gudana ta cikin naɗaɗɗen motar ta zama sinusoidal. Saboda haka, dole ne a san siginar matsayin rotor mai ci gaba, kuma inverter zai iya samar da ƙarfin sinusoidal ko current ga motar. Saboda haka, PMSM yana buƙatar ɗaukar babban ƙarfin lantarki ko current. Ƙudurin na'urar daidaita matsayi ko mai warwarewa shima yana da rikitarwa sosai.

BLDCM ba ya buƙatar firikwensin matsayi mai ƙuduri mai girma, na'urar amsawa tana da sauƙi, kuma tsarin sarrafawa yana da sauƙi. Bugu da ƙari, filin maganadisu na rata na iska na BLDCM trapezoidal wave ya fi inganci fiye da na PMSM sinusoidal wave, kuma yawan ƙarfin BLDCM ya fi na PMSM. Saboda haka, aikace-aikacen da bincike na injin DC mara maganadisu na dindindin ya sami ƙarin kulawa.