Servo motors tau muab faib ua ob pawg: AC servo thiab DC servo.
Cov qauv ntawm AC servo lub cev muaj zog zoo ib yam li AC induction lub cev muaj zog (asynchronous motor). Muaj ob qhov excitation windings Wf thiab tswj windings WcoWf nrog rau theem chaw hloov chaw ntawm 90 degree hluav taws xob lub kaum sab xis ntawm lub stator, uas txuas nrog rau qhov tsis tu ncua AC voltage. Lub AC voltage lossis theem hloov siv rau Wc yog siv los tswj kev ua haujlwm ntawm lub cev muaj zog.
AC servo motors muaj cov yam ntxwv ntawm kev ua haujlwm ruaj khov, kev tswj tau zoo, cov lus teb ceev ceev, siab rhiab heev, thiab nruj nonlinearity ntsuas ntawm cov yam ntxwv thiab kev hloov kho (yuav tsum tsawg dua 10% ~ 15% thiab tsawg dua 15% ~ 25% feem)
Qhov zoo thiab qhov tsis zoo ntawm DC Servo Motors
Qhov zoo: tswj ceev ceev, nruj heev torque-ceev yam ntxwv, yooj yim tswj txoj cai, yooj yim rau siv, thiab pheej yig.
Disadvantages: txhuam commutation, ceev txwv, ntxiv kuj, thiab tiam ntawm hnav hais (tsis haum rau plua plav-dawb thiab explosive ib puag ncig).
Lub hauv paus qauv ntawm DC servo lub cev muaj zog zoo ib yam li ntawm DC lub cev muaj zog. Lub cev muaj zog ceev n=E/K1j=(Ua-IaRa)/K1j, qhov twg E yog armature rov qab electromotive quab yuam, K yog qhov tas li, j yog flux rau ib tug ncej, Ua thiab Ia yog lub armature voltage thiab armature tam sim no, thiab Ra yog armature kuj. Hloov ua lossis hloov φ tuaj yeem tswj tau qhov ceev ntawm DC servo lub cev muaj zog, tab sis feem ntau siv cov txheej txheem ntawm kev tswj cov armature voltage. Nyob rau hauv cov hlau nplaum ruaj khov DC servo motors, qhov excitation winding yog hloov los ntawm cov hlau nplaum ruaj khov, thiab cov flux φ yog tas li. DC servo motors muaj cov yam ntxwv zoo linear tswj thiab ceev lub sij hawm teb.
