Uma kuqhathaniswa nemoto ye-DC kanye nemoto engahambisani, izici zobuchwepheshe ezibalulekile zemoto ye-Brushless DC yilezi:

1. Izici zokusebenza kwemoto ye-DC zitholakala ngokulawulwa kwe-elekthronikhi. Inokulawulwa okungcono kanye nobubanzi besivinini.

2. Kudingeka ulwazi lwempendulo yesikhundla se-rotor kanye nomshayeli we-inverter we-electronic multiphase.

3. Ngokuyisisekelo, injini ye-AC ingasebenza ngesivinini esikhulu ngaphandle kwenhlansi nokuklwebheka kwebhulashi kanye ne-commutator. Inokuthembeka okuphezulu, isebenza isikhathi eside futhi ayidingi ukulungiswa.

4. Imoto ye-DC engenamabhulashi inamandla aphezulu, ayinawo ukulahleka kwe-rotor nokushisa, kanye nokusebenza kahle okuphezulu: uma kuqhathaniswa nedatha, ukusebenza kahle kwemoto engu-7.5 kW engahambisani ne-asynchronous kungu-86.4%, kanti ukusebenza kahle kwemoto ye-DC engenamabhulashi efanayo kungafinyelela ku-92.4%.

5.Kumele kube nezingxenye zokulawula ze-elekthronikhi, izindleko zizonke ziphakeme kunemoto ye-DC.

Kunezinhlobo ezimbili zama-motor ezisetshenziswa kakhulu ohlelweni lwe-AC: i-induction motor kanye ne-permanent magnet synchronous motor. I-permanent magnet synchronous motor ingahlukaniswa ibe yi-sinusoidal back EMF permanent magnet synchronous motor (PMSM) kanye ne-square wave back EMF brushless DC motor (BLDCM) ngokwemigomo yokusebenza ehlukene. Ukuze imodi yabo yamanje yokushayela kanye neyokulawula ihluke.

I-EMF yangemuva yemoto ye-sinusoidal permanent magnet synchronous yi-sinusoidal. Ukuze imoto ikhiqize i-torque ebushelelezi, ugesi ogeleza ngokugoqa imoto kumele ube yi-sinusoidal. Ngakho-ke, isignali yesikhundla se-rotor eqhubekayo kumele yaziwe, futhi i-inverter inganikeza ugesi noma ugesi we-sinusoidal kumoto. Ngakho-ke, i-PMSM idinga ukusebenzisa ugesi noma ugesi ophezulu. Isixazululo se-encoder yesikhundla noma i-resolver naso siyinkimbinkimbi kakhulu.

I-BLDCM ayidingi inzwa yesikhundla esinesinqumo esiphezulu, idivayisi yempendulo ilula, futhi i-algorithm yokulawula ilula kakhulu. Ngaphezu kwalokho, insimu yamagnetic yegebe lomoya ye-BLDCM trapezoidal wave isebenza kahle kakhulu kuneye-PMSM sinusoidal wave, futhi ubukhulu bamandla be-BLDCM buphakeme kunobe-PMSM. Ngakho-ke, ukusetshenziswa nokucwaninga kwe-permanent magnet brushless DC motor kuye kwathola ukunakwa okwengeziwe.