Ithiyori eyisisekelo yokusebenza kwama-brushless servo motors izungeza ezimisweni zikazibuthe lapho njengezigxobo zixosha futhi izigxobo eziphambene ziheha. Kunemithombo emibili kazibuthe etholakala ngaphakathi kwe-servo motor: Ozibuthe baphakade abatholakala kurotha yenjini, kanye nezizibuthe zikagesi ezimile ezizungeza i-rotor. I-electromagnetic ibizwa ngokuthi i-stator noma i-motor winding futhi yakhiwe ngamapuleti ensimbi abizwa ngokuthi ama-laminations, ahlanganiswe ndawonye. Amapuleti ensimbi ngokuvamile "amazinyo" avumela ucingo lwethusi ukuba luboshwe nxazonke.
Ukubuyela emuva ezimisweni zamagnetism, lapho umqhubi ofana nocingo lwethusi akhiwa abe ikhoyili, futhi umqhubi unikezwa amandla ukuze umbane ugeleze kuwo, insimu yamagnetic idalwe.
Le nkundla kazibuthe edalwe ukudlula kwamanje ku-conductor izoba nesigxobo esisenyakatho nesigxobo esiseningizimu. Ngezigxobo kazibuthe ezitholakala ku-stator (uma inikwe amandla) kanye nozibuthe unomphela be-rotor, usenza kanjani isimo sezigxobo eziphambene ezihehayo futhi njengezigxobo ezixosha?
Isihluthulelo siwukuba uhlehlise amandla akhona ngokusebenzisa uzibuthe kagesi. Lapho i-current igeleza ngekhoyili eqhubayo ohlangothini olulodwa, izigxobo ezisenyakatho nezaseningizimu ziyadalwa.
Lapho isiqondiso somsinga sishintshwa, izigxobo ziyaphetshwa ngakho lokho okwakuyi-north pole manje sekuyisigxobo esiseningizimu futhi ngokuphambene nalokho. Umfanekiso 1 unikeza umfanekiso oyisisekelo wokuthi lokhu kusebenza kanjani. Emfanekisweni wesi-2, isithombe esingakwesokunxele sibonisa isimo lapho izigxobo zamagnethi we-rotor zikhangwa ezigxotsheni eziphambene ze-stator. Izigxobo ze-rotor, ezixhunywe ku-motor shaft, zizojikeleza zize zihambisane nezigxobo eziphambene ne-stator. Uma konke kuhlala okufanayo i-rotor ibizohlala imile.
Isithombe esingakwesokudla kumfanekiso wesi-2 sibonisa ukuthi izigxobo ze-stator ziphenduke kanjani. Lokhu kwakuzokwenzeka njalo lapho isigxobo se-rotor sibamba isigxobo se-stator esiphambene ngokuhlehlisa ukugeleza kwamanje kuleyo ndawo ye-stator. Ukuphequlula okuqhubekayo kwezigxobo ze-stator kudala isimo lapho izigxobo zikazibuthe ezihlala njalo ze-rotor zihlala "zijaha" okuphambene ne-stator okuholela ekujikelezeni okuqhubekayo kwe-rotor/motor shaft.
Ukuphetshwa kwezigxobo ze-stator kwaziwa njengokuhamba. Incazelo esemthethweni yokuhamba ithi “Isenzo samaza okuqondisa aye ezigabeni ezifanele zemoto ukuze kukhiqizwe itorque yemoto kanye nokuzungezisa shaft shaft”. Ama-currents aqondiswa kanjani ngesikhathi esifanele ukuze agcine ukujikeleza kwe-shaft?
Ukuqondisa kwenziwa yi-inverter noma idrayivu enika amandla injini. Uma idrayivu isetshenziswa ngemoto ethile i-engeli ye-offset ikhonjwa ku-software yokushayela kanye nezinye izinto ezifana ne-motor inductance, ukumelana, namanye amapharamitha. Idivayisi yempendulo esetshenziswa enjinini (i-encoder, solver, njll..) inikeza indawo ye-rotor shaft/i-magnetic pole kudrayivu.
Lapho isigxobo sikazibuthe se-rotor sifana ne-engeli ye-offset, idrayivu izohlehlisa indlela yamanje ehamba ikhoyili ye-stator ngaleyo ndlela iguqule isigxobo se-stator ukusuka enyakatho kuye eningizimu nokusuka eningizimu kuya enyakatho njengoba kubonisiwe kuMfanekiso 2. Kulokhu ungabona ukuthi ukuvumela izigxobo ziqondanise kuzomisa ukujikeleza kwe-motor shaft, noma ukushintsha ukulandelana kuzothola i-shaft spinning in one direction vs. enye, futhi ukuwashintsha ngokushesha kuvumela ukujikeleza kwesivinini noma okuphambene nje nokujikeleza kwe-shaft kancane.
