AC servo motors feem ntau muaj kev ua tau zoo dua vim tias lawv siv cov kev tswj cov yoj sinusoidal, ua rau lub zog tsawg dua; Thaum brushless DC servos siv trapezoidal yoj tswj. Txawm li cas los xij, brushless DC servos yog qhov yooj yim dua thiab pheej yig dua los tswj.
Txoj kev loj hlob sai ntawm cov hlau nplaum ruaj khov AC servo tsav tshuab tau hem kom tshem tawm DC servo systems. Txij li thaum xyoo 1980s, nrog rau kev txhim kho ntawm kev sib xyaw ua ke, hluav taws xob hluav taws xob, thiab AC hloov pauv ceev tsav tshuab, cov hlau nplaum ruaj khov AC servo tsav tshuab tau pom kev nce qib tseem ceeb. Cov tuam txhab hluav taws xob ua lag luam thoob ntiaj teb tau tsim tawm tshiab AC servo motors thiab servo tsav tsheb series khoom. AC servo systems tau dhau los ua txoj kev loj hlob tseem ceeb rau kev kawm siab -kev ua tau zoo servo systems, muab DC servo systems muaj kev pheej hmoo ntawm kev ploj tuag.
Piv rau DC servo motors, cov hlau nplaum ruaj khov AC servo motors muaj qhov zoo hauv qab no:
(1) Tsis muaj txhuam los yog commutators, ua rau muaj kev txhim khu kev qha thiab kev saib xyuas ntau dua - ua haujlwm dawb.
(2) Qhov tseem ceeb txo stator winding cua sov tsim.
(3) Tsawg inertia, ua rau cov lus teb zoo dua.
(4) Kev ua tau zoo heev ntawm kev kub ceev thiab siab torque.
(5) Qhov loj me thiab qhov hnyav dua rau tib lub zog tso zis.
