Kev sib piv ntawm AC Servo Tsav Xaiv

AC servo lub cev muaj zog
Cov qauv ntawm lub stator ntawm AC servo lub cev muaj zog yog qhov zoo ib yam li lub capacitor cais theem ib-theem asynchronous lub cev muaj zog. Lub stator yog nruab nrog ob windings nrog ib tug 90 degree sib txawv nyob rau hauv txoj hauj lwm, ib tug ntawm cov excitation winding Rf, uas yog ib txwm txuas nrog AC voltage Uf; Lwm qhov yog tswj winding L thiab txuas cov tswj teeb liab voltage Uc. Yog li AC servo motors tseem hu ua ob lub servo motors.
Lub rotor ntawm AC servo lub cev muaj zog feem ntau yog tsim rau hauv hom squirrel tawb, tab sis txhawm rau xyuas kom meej tias lub servo lub cev muaj zog muaj ntau yam ceev, cov yam ntxwv ntawm cov khoom siv, tsis muaj "kev sib hloov" tshwm sim, thiab cov lus teb ceev ceev, nws yuav tsum muaj ob. Cov yam ntxwv piv rau cov motors zoo tib yam: siab rotor tsis kam thiab lub sij hawm me me ntawm inertia. Tam sim no, muaj ob hom rotor qauv uas tau siv dav: ib qho yog squirrel tawb rotor ua los ntawm cov khoom siv hluav taws xob siab nrog cov khoom siv hluav taws xob siab. Txhawm rau txo qhov kev sib hloov inertia ntawm lub rotor, lub rotor yog ua kom slender; Lwm hom yog lub khob hollow rotor ua los ntawm txhuas alloy, nrog lub khob nyias nyias ntawm tsuas yog 0 2-0.3mm. Txhawm rau txo qhov sib nqus ntawm qhov sib nqus ntawm qhov sib nqus, lub stator ruaj khov yuav tsum tau muab tso rau hauv lub khob hollow rotor. Lub hollow khob rotor muaj lub sijhawm me me ntawm inertia, cov tshuaj tiv thaiv sai, thiab kev ua haujlwm du, yog li nws tau siv dav.
Thaum tsis muaj kev tswj xyuas qhov hluav taws xob hauv AC servo lub cev muaj zog, tsuas yog lub tshuab hluav taws xob sib nqus uas tsim los ntawm kev ua kom muaj zog hauv stator, thiab lub rotor tseem nyob ruaj khov. Thaum muaj kev tswj qhov hluav taws xob, lub tshuab hluav taws xob sib nqus yog tsim nyob rau hauv stator, thiab lub rotor tig mus rau hauv cov kev taw qhia ntawm rotating magnetic teb. Nyob rau hauv tas li load, qhov ceev ntawm lub cev muaj zog hloov nrog qhov loj ntawm cov tswj voltage. Thaum cov theem ntawm kev tswj qhov hluav taws xob yog qhov sib txawv, lub servo lub cev muaj zog yuav thim rov qab.
Cov hlau nplaum ruaj khov AC servo lub cev muaj zog
Txij li thaum xyoo 1980s, nrog rau kev txhim kho ntawm kev sib koom ua ke, kev siv hluav taws xob hluav taws xob, thiab AC hloov pauv ceev tsav tshuab, cov hlau nplaum ruaj khov AC servo tsav tshuab tau ua tiav zoo. Cov tuam txhab hluav taws xob nto moo hauv ntau lub teb chaws tau ua tiav lawv tus kheej ntawm AC servo motors thiab servo drives, uas tau txhim kho thiab hloov kho tas li. AC servo systems tau dhau los ua txoj kev loj hlob tseem ceeb ntawm cov kev ua haujlwm siab servo niaj hnub, ua rau muaj teeb meem ntawm kev tshem tawm rau thawj DC servo system. Tom qab xyoo 1990, AC servo systems uas tau ua lag luam nyob rau hauv ntau lub teb chaws thoob ntiaj teb tau tsav los ntawm sine yoj motors siv tag nrho cov digital tswj. Kev txhim kho ntawm AC servo tsav cov cuab yeej hauv kev sib kis tau hloov pauv sai.
Lub ntsiab zoo ntawm cov hlau nplaum ruaj khov AC servo motors piv rau DC servo motors yog:
⑴ Tsis muaj txhuam thiab commutators, nws ua haujlwm ntseeg tau thiab muaj kev xav tau qis rau kev tu thiab tu.
⑵ Lub stator winding tau yooj yim cua sov dissipation.
⑶ Me inertia, yooj yim los txhim kho lub kaw lus ceev.
Haum rau kev kub ceev thiab siab torque ua haujlwm.
Raws li tib lub zog, nws muaj qhov ntim me me thiab qhov hnyav.
Kev sib piv ntawm servo motors thiab ib-theem asynchronous motors
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm AC servo motors zoo ib yam li kev sib cais theem ib-theem asynchronous motors, tab sis lub rotor tsis kam ntawm lub qub yog ntau dua li ntawm tom kawg. Yog li ntawd, piv nrog ib qho asynchronous motors, servo motors muaj peb yam tseem ceeb:
1. Siab pib torque
Due to the high rotor resistance, there is a significant difference in the torque characteristic curve compared to ordinary asynchronous motors. It can make the critical slip rate S0>1, uas tsis yog tsuas yog ua rau cov yam ntxwv torque (cov yam ntxwv ntawm cov tshuab) ze rau linearity, tab sis kuj muaj qhov pib torque loj dua. Yog li ntawd, sai li sai tau thaum lub stator muaj kev tswj voltage, lub rotor tam sim ntawd tig, uas muaj cov yam ntxwv ntawm ceev pib thiab siab rhiab heev.
2. Kev ua haujlwm dav dav
3. Tsis muaj qhov tshwm sim autorotation
Ib txwm khiav servo lub cev muaj zog yuav nres tam sim ntawd sai li sai tau thaum lub zog tswj tau ploj lawm. Thaum lub servo lub cev muaj zog poob tswj qhov hluav taws xob, nws yog nyob rau hauv ib lub sijhawm ua haujlwm. Vim lub siab rotor tsis kam, ob qhov sib txawv ntawm qhov sib nqus sib nqus hauv lub stator cuam tshuam nrog lub rotor los tsim ob lub zog torque (T1-S1, T2-S2 nkhaus) thiab cov yam ntxwv sib xyaw torque (TS curves )
Lub zog tso zis ntawm AC servo motors feem ntau yog 0.1-100W. Thaum lub zog zaus yog 50Hz thiab qhov hluav taws xob yog 36V, 110V, 220V, 380V; Thaum lub zog zaus yog 400Hz, muaj ntau yam voltages xws li 20V, 26V, 36V, 115V, thiab lwm yam.
AC servo lub cev muaj zog ua haujlwm zoo thiab muaj suab nrov tsawg. Txawm li cas los xij, cov yam ntxwv ntawm kev tswj tsis yog linear, thiab vim qhov siab rotor tsis kam, siab poob, thiab kev ua haujlwm qis, piv rau DC servo motors ntawm tib lub peev xwm, qhov ntim loj thiab qhov hnyav, yog li nws tsuas yog tsim rau me me. fais fab tswj systems ntawm 0 5-100W.