Ma servo motor maginito amatsimikizira ma servo motors kuti aziwongolera liwiro lolondola komanso kulondola kwamalo, ndipo amatha kusintha siginecha yamagetsi kukhala torque ndi liwiro kuyendetsa chinthu chowongolera.Kuthamanga kwa rotor kwa servo motor kumayendetsedwa ndi chizindikiro cholowera ndipo kumatha kuchitapo kanthu mwachangu.
Popeza nthambi ya Indramat ya Rexroth idakhazikitsa mwalamulo maginito okhazikika a MAC AC servo motor and drive system pa Hannover trade fair mu 1978, izi zikuwonetsa kuti m'badwo watsopanowu waukadaulo wa AC servo walowa mu gawo lothandiza.Pofika pakati ndi kumapeto kwa zaka za m'ma 1980, kampani iliyonse inali ndi mndandanda wathunthu wazinthu.Msika wonse wa servo ukutembenukira ku machitidwe a AC.Makina ambiri amagetsi amagetsi omwe amagwira ntchito kwambiri amagwiritsa ntchito maginito okhazikika a AC servo motor, ndipo dalaivala wowongolera nthawi zambiri amatenga makina onse a digito a servo ndikuyika mwachangu komanso molondola.Pali opanga ambiri monga Siemens,Kollmorgen, Panasonic,Yaskawa, ndi zina.
Chifukwa cha ntchito yolondola ya injini ya servo, ili ndi kufunikira kokhazikika pakugwira ntchito moyenera komanso magwiridwe antchito apamwamba, zomwe zimatengera mtundu wa maginito a Neodymium amagetsi a servo.Chifukwa osiyanasiyana apamwamba maginito katundu, Neodymium maginito imapangitsa servo Motors zotheka ndi kulemera otsika ndi ang'onoang'ono kukula poyerekeza ndi chikhalidwe maginito zipangizo, monga maginito Ferrite, Alnico kapena SmCo.
Kwa maginito a servo motor, pakadali pano Horizon Magnetics akupanga maginito apamwamba a Neodymium, monga H, SH, UH, EH ndi AH okhala ndi mikhalidwe itatu:
1.High intrinsic coercivity Hcj: yokwera mpaka>35kOe (>2785 kA/m) yomwe imawonjezera kukana kwa maginito kutulutsa mphamvu ndikukhazikika kwa servo motor
2.Mawotchi otsika osinthika: otsika mpaka α(Br)< -0.1%/ºC ndi β(Hcj)< -0.5%/ºC zomwe zimawonjezera kukhazikika kwa kutentha kwa maginito ndikuwonetsetsa kuti ma servo motors azigwira ntchito mwamphamvu kwambiri
3.Kuwonda kochepa: otsika mpaka 2 ~ 5mg/cm2 poyezetsa HAST: 130ºC, 95% RH, 2.7 ATM, masiku 20 omwe amawonjezera kukana kwa dzimbiri kwa maginito kuti atalikitse nthawi yamoyo ya ma servo motors.
Chifukwa cha zomwe takumana nazo popereka maginito opanga ma servo motor, Horizon Magnetics amamvetsetsa kuti maginito a servo motor amafunikira mayeso okwanira kuti atsimikizire mtundu wake wolimba, mongademagnetization zokhotakhotapa kutentha kwambiri kuti muwone kugwira ntchito kwa bata, PCT & SST kuti muphunzire mtundu wa zigawo zokutira, HAST kuti mupeze kuwonda, kutentha kutentha kwambiri kuti muphunzire kutayika kosasinthika, kupatuka kwa maginito kuti muchepetse jitter yamagalimoto, ndi zina zambiri.
