AC servo lub cev muaj zog yog ob-theem AC asynchronous lub cev muaj zog. Nws tus stator yog nruab nrog ob kab sib kis 90 ° sib nrug: kev sib tw winding thiab tswj winding. Ib qho yog qhov kev lees paub winding Rf, Servo Tsav uas ib txwm txuas rau AC voltage Uf; lwm qhov yog kev tswj hwm winding L, Servo Tsav uas txuas nrog tswj lub teeb liab voltage Uc. Yog li ntawd, AC servo motor tseem hu ua ob lub cav servo.
Qhov kev sib tw winding tau txuas nrog hauv kab nrog lub ntsuas hluav taws xob C kom tsim kom muaj ob-theem kev sib hloov chaw sib nqus. Kev xaiv qhov tsim nyog ntawm qhov loj me ntawm tus capacitor tuaj yeem ua rau theem sib txawv ntawm qhov tam sim no ntws mus rau ob kab ntawm ze ntawm 90 °, Servo Tsav li qhov tsim kom muaj qhov yuav tsum tau tig sib nqus.
Qhov ntsuas tsis pub cua yog sib khi txuas nrog lub hwj huam hluav taws xob. Thaum tus tswj voltage yog xoom, lub cev muaj zog tsis muaj lub zog pib thiab lub rotor tsis tig. Yog hais tias ib qho ntsuas hluav taws xob tau siv rau qhov kev tswj xyuas winding, thiab qhov tam sim no zoo siab. Thaum nws txawv los ntawm kev tswj hwm winding tam sim no, Servo Tsav ib ob-theem kev sib hloov daim teb hlau nplaum yog tsim. Raws li qhov ua ntawm ib lub teb tig sib nqus, lub rotor tig.