Stepper lub cev muaj zog yog ib qho khoom siv sib cais, uas muaj kev sib txuas tseem ceeb nrog cov cuab yeej digital tswj niaj hnub.Nyob rau hauv tam sim no domestic digital tswj system, stepper motors tau dav siv.Nrog rau qhov tshwm sim ntawm tag nrho cov digital AC servo systems, AC servo motors tau nce siv hauv cov tshuab tswj digital.Txhawm rau hloov mus rau txoj kev loj hlob ntawm kev tswj hwm digital, stepper motors lossis all-digital AC servo motors feem ntau yog siv los ua cov thawj coj hauv kev tswj cov tshuab.Txawm hais tias ob qho tib si zoo sib xws hauv kev tswj hwm (miv lub tsheb ciav hlau thiab cov teeb liab taw qhia), muaj qhov sib txawv loj hauv kev ua haujlwm thiab kev siv sijhawm.Tam sim no sib piv qhov kev ua tau zoo ntawm ob.
Kev tswj qhov tseeb yog qhov sib txawv
Cov kauj ruam ntawm ob-theem hybrid stepper motors feem ntau yog 3.6 degrees thiab 1.8 degrees, thiab cov kauj ruam ntawm tsib theem hybrid stepper motors feem ntau yog 0.72 degrees thiab 0.36 degrees.Kuj tseem muaj qee qhov kev ua haujlwm siab stepper motors nrog cov kauj ruam me me.Piv txwv li, lub stepping lub cev muaj zog tsim los ntawm Tuam Txhab Pob Zeb rau qeeb-tsav hlau tshuab cov cuab yeej muaj lub kaum sab xis ntawm 0.09 degrees; peb-theem hybrid stepping lub cev muaj zog tsim los ntawm BERGER LAHR muaj lub kaum sab xis ntawm 0.09 degrees. DIP hloov yog teem rau 1.8 degrees, 0.9 degrees, 0.72 degrees, 0.36 degrees, 0.18 degrees, 0.09 degrees, 0.072 degrees, 0.036 degrees, uas yog sib xws nrog lub kaum sab xis ntawm ob-theem thiab tsib-theem hybrid stepping motors.
Kev tswj qhov tseeb ntawm AC servo lub cev muaj zog yog lav los ntawm lub tshuab hluav taws xob teb ntawm qhov kawg ntawm lub cev muaj zog.Rau lub cev muaj zog nrog tus qauv 2500-kab encoder, qhov sib npaug ntawm cov mem tes yog 360 degrees / 10000 = 0.036 degrees vim yog plaub lub zaus siv tshuab hauv tus tsav tsheb.Rau lub cev muaj zog nrog 17-ntsis encoder, txhua zaus tus neeg tsav tsheb tau txais 217 = 131072 pulses, lub cev muaj zog ua rau ib lub kiv puag ncig, uas yog, nws cov mem tes sib npaug yog 360 degrees / 131072 = 9.89 vib nas this.Nws yog 1/655 ntawm cov mem tes sib npaug ntawm lub cev muaj zog stepper nrog lub kaum sab xis ntawm 1.8 degrees.
Cov yam ntxwv tsawg zaus yog txawv:
Stepper motors yog nquag mus rau qis zaus vibrations ntawm tsawg ceev.Lub vibration zaus muaj feem xyuam rau lub load thiab kev ua haujlwm ntawm tus neeg tsav tsheb. Nws feem ntau ntseeg tau tias qhov kev vibration zaus yog ib nrab ntawm qhov tsis muaj kev thauj mus los ntawm lub cev muaj zog.Qhov no tsis tshua muaj kev vibration phenomenon txiav txim los ntawm lub hauv paus ntsiab lus ntawm kev ua hauj lwm ntawm lub stepping lub cev muaj zog yog heev unfavorable rau lub cev ua hauj lwm ntawm lub tshuab.Thaum lub stepper lub cev muaj zog ua haujlwm ntawm qhov ceev ceev, damping tshuab feem ntau yuav tsum tau siv los kov yeej qhov tsis tshua muaj kev vibration tshwm sim, xws li ntxiv lub damper rau lub cev muaj zog, los yog siv subdivision technology ntawm tus tsav tsheb, thiab lwm yam.
Lub AC servo lub cev muaj zog khiav zoo heev thiab tsis vibrate txawm nyob rau qis speeds.Lub AC servo system muaj lub zog resonance kev ua haujlwm, uas tuaj yeem npog qhov tsis muaj kev nruj ntawm lub tshuab, thiab lub kaw lus muaj qhov ntsuas zaus (FFT) hauv lub kaw lus, uas tuaj yeem kuaj xyuas qhov resonance point ntawm lub tshuab thiab pab txhawb kev hloov kho.
Cov yam ntxwv ntawm lub sijhawm-zaum yog txawv:
Cov zis torque ntawm stepper lub cev muaj zog txo qis nrog qhov nce ntawm qhov nrawm, thiab nws yuav poob qis ntawm qhov nrawm dua, yog li nws qhov kev ua haujlwm siab tshaj plaws yog feem ntau 300-600RPM.Lub AC servo lub cev muaj zog tas li tso zis, uas yog, nws tuaj yeem tso tawm qhov ntsuas torque nyob rau hauv nws qhov ntsuas ceev (feem ntau 2000RPM lossis 3000RPM), thiab nws yog lub zog tas li tshaj qhov ntsuas ceev.
Lub peev xwm overload yog txawv:
Stepper motors feem ntau tsis muaj peev xwm overload.AC servo lub cev muaj zog muaj peev xwm overload.Siv Panasonic AC servo system ua piv txwv, nws muaj peev xwm ua tau ntau dhau thiab torque overload.Nws qhov siab tshaj plaws torque yog peb zaug ntawm qhov ntsuas torque, uas tuaj yeem siv los kov yeej lub sijhawm ntawm inertia ntawm inertial load thaum lub sijhawm pib.Vim tias lub tshuab stepper tsis muaj qhov muaj peev xwm dhau qhov no, txhawm rau txhawm rau kov yeej lub sijhawm no ntawm inertia thaum xaiv tus qauv, feem ntau yuav tsum xaiv lub cev muaj zog nrog lub zog loj dua, thiab lub tshuab tsis xav tau lub zog loj thaum lub sijhawm. ib txwm ua haujlwm, yog li lub torque tshwm. Lub phenomenon ntawm pov tseg.
Kev khiav haujlwm yog txawv:
Kev tswj ntawm stepping lub cev muaj zog yog ib qho qhib-voj tswj. Yog hais tias qhov pib zaus siab dhau los yog lub load loj dhau lawm, cov kauj ruam poob los yog stalling yuav yooj yim tshwm sim. Thaum qhov ceev yog siab dhau lawm, overshooting yuav yooj yim tshwm sim thaum qhov ceev heev. Yog li ntawd, txhawm rau kom ntseeg tau tias nws tswj tau qhov tseeb, nws yuav tsum tau ua kom zoo. Ascent thiab deceleration teeb meem.AC servo tsav system yog kaw-voj tswj. Tus tsav tuaj yeem ua qauv ncaj qha rau cov lus qhia tawm tswv yim ntawm lub cev muaj zog encoder, thiab lub voj voog nyob sab hauv thiab nrawm yog tsim. Feem ntau, yuav tsis muaj kauj ruam poob lossis overshoot ntawm stepping motor, thiab kev tswj kev ua tau zoo yog txhim khu kev qha.
Qhov ceev teb kev ua tau zoo yog txawv:
Nws yuav siv sij hawm 200-400 milliseconds rau stepper lub cev muaj zog kom nrawm ntawm qhov chaw nres tsheb mus rau kev ua haujlwm ceev (feem ntau ntau pua lub kiv puag ncig ib feeb).Lub acceleration kev ua tau zoo ntawm AC servo system yog zoo dua. Noj CRT AC servo lub cev muaj zog ua piv txwv, nws tsuas yog siv ob peb milliseconds kom nrawm los ntawm qhov zoo li qub rau nws qhov ntsuas ceev ntawm 3000RPM, uas tuaj yeem siv rau hauv kev tswj xyuas uas yuav tsum tau pib sai thiab nres.
Piv txwv li, AC servo system yog superior rau stepper lub cev muaj zog nyob rau hauv ntau yam ntawm kev ua tau zoo.Tab sis nyob rau qee lub sijhawm xav tau tsawg dua, stepper motors feem ntau yog siv los ua cov tsav tsheb.Yog li ntawd, nyob rau hauv tus txheej txheem tsim ntawm kev tswj qhov system, ntau yam xws li kev tswj cov kev cai thiab cov nqi yuav tsum tau txiav txim siab, thiab yuav tsum xaiv lub cev muaj zog tswj kom tsim nyog.
Stepper lub cev muaj zog yog ib qho actuator uas hloov hluav taws xob pulses mus rau hauv qhov hloov pauv.Nyob rau hauv layman cov ntsiab lus: thaum tus tsav tsheb stepper tau txais lub teeb liab mem tes, nws tsav lub stepper lub cev muaj zog tig lub kaum sab xis (thiab lub kaum sab xis) nyob rau hauv cov kev taw qhia.
Koj tuaj yeem tswj tau lub kaum sab xis txav los ntawm kev tswj cov naj npawb ntawm cov pulses, thiaj li ua tiav lub hom phiaj ntawm qhov tseeb; Nyob rau tib lub sijhawm, koj tuaj yeem tswj tau qhov nrawm thiab nrawm ntawm lub cev muaj zog tig los ntawm kev tswj cov mem tes zaus, kom ua tiav lub hom phiaj ntawm kev tswj ceev.
Muaj peb hom stepper motors: cov hlau nplaum ruaj khov (PM), reactive (VR) thiab hybrid (HB).
Cov hlau nplaum ruaj khov stepping feem ntau yog ob-theem, nrog lub zog me me thiab ntim, thiab lub kaum sab xis feem ntau yog 7.5 degrees lossis 15 degrees;
Reactive stepping feem ntau yog peb-theem, uas tuaj yeem paub qhov loj torque tso tawm, thiab lub kaum sab xis feem ntau yog 1.5 degrees, tab sis lub suab nrov thiab kev vibration loj heev.Hauv cov teb chaws tsim kho xws li Europe thiab Tebchaws Meskas, nws tau raug tshem tawm hauv 1980s;
hybrid stepper hais txog kev sib xyaw ua ke ntawm qhov zoo ntawm cov hlau nplaum ruaj khov thiab hom reactive.Nws muab faib ua ob-theem thiab tsib-theem: ob-theem kauj ruam yog feem ntau 1.8 degrees thiab tsib-theem kauj ruam yog feem ntau 0.72 degrees.Hom stepper lub cev muaj zog no yog siv dav tshaj plaws.
Post lub sij hawm: Mar-25-2023