Stepper motors yog ib qho ntawm cov qauv siv yooj yim rau kev siv hauv cov qauv tsim hluav taws xob uas yuav tsum muaj qhov ua tiav ntawm qhov tseeb thiab qhov yuav tsum tau rov ua dua. Hmoov tsis, txoj kev tsim kho ntawm cov cav tsheb nqaj hlau tsis muaj kev txwv qis rau ntawm lub cev, feem ntau qis dua qhov kev siv hluav taws xob tuaj yeem tsav tsheb. Thaum muaj kev kub ceev ntawm kev ua haujlwm ntawm lub cav yuav tsum yog qhov nyuaj ntawm qhov kev siv nce ntxiv raws li ntau yam pib tuaj ua si.
Kev kub ceev Stepper Motor Factors
Muaj ntau yam ua cov qauv tsim thiab cov teeb meem kev ua thaum cov theem cav hlau tau tsav thaum muaj kev kub ceev. Zoo li ntau yam khoom, qhov kev coj cwj pwm hauv lub ntiaj teb tiag tiag tsis yog qhov zoo tshaj plaws thiab ib qho kev quaj ntsuag ntawm kev xav. Stepper motors max ceev yuav txawv ntawm cov chaw tsim khoom, qauv, thiab qhov inductance ntawm lub cev muaj zog ntawm 1000-3000 RPM kev siv tau (rau siab dua, servo motors yog ib qho kev xaiv zoo dua). Qhov tseem ceeb tshaj plaws uas cuam tshuam tau rau theem pib tsav tsheb nyob rau hauv siab ceev yog:
- Inertia - Txhua yam khoom uas tau tsiv tau ua rau tsis muaj teebmeem hauv kev ua haujlwm ntawm kev ua haujlwm. Hauv kev siv qis qis dua, nws tau pib tsav tsheb kauj vab khiav ntawm qhov kev xav tau yam tsis muaj qhov tsis muaj. Txawm li cas los xij, sim tsav tsheb rau ntawm lub kauj vab ruam ntawm kev kub ceev tam sim ntawd yog ib qho zoo kawg nkaus los hla tawm cov kauj ruam thiab poob txoj haujlwm. Tsuas yog lub cev nyhav me me uas muaj me ntsis qhov teebmeem me, yuav tsum muaj lub cav ntiv tes yuav tsum tuaj yeem khiav ceev los ntawm kev khiav ceev kom tsis txhob muaj kev kub ntxhov thiab tswj xyuas. Cov kev tswj theem pib ntawm kev tswj theem zog xws li cov kev txwv acceleration thiab cov tswv yim los txhawb rau kev ua kom tsis taus.
- Torque Curves - Lub zog ntawm lub cav ntoo tsis yog tib yam rau txhua qhov kev ua haujlwm tab sis yog li qhov nce theem nce. Yog vim li cas rau qhov no yog xyuas raws li cov thawj coj ua haujlwm ntawm cov cav ntoo. Lub teeb liab tsav rau stepper motors generates ib qhov chaw ntawm magnetic nyob rau hauv lub coils ntawm lub cev kom ua lub zog los mus ua ib kauj ruam. Lub sijhawm nws yuav siv lub magnetic teb tuaj mus rau tag nrho lub zog yog nyob ntawm qhov inductance ntawm lub kauj, tsav hluav taws xob, thiab kev txwv tam sim no. Raws li kev tsav tsheb nce ntxiv, lub sij hawm lub coils nyob twj ywm ntawm lawv cov peev xwm ua kom luv thiab lub zog ntawm lub tshuab yuav ua rau poob dauv.
- Tsav Tawm Tsav - Tsav kom muaj zog nyob rau hauv lub kauj ruam tsav, lub teeb liab tam sim no yuav tsum mus txog qhov siab tshaj plaws tsav tam sim no thiab hauv kev siv qis zog no yuav tsum tau ua kom sai li sai tau. Tsav tsheb kauj vab uas muaj hluav taws xob ntau dua tuaj yeem pab txhim kho lub zog ntawm kev siab ceev uas tau pib siv rau hauv qhov chaw tsav tsheb tam sim no.
- Tuag Zone - Lub tswv yim zoo tshaj plaws ntawm lub tshuab tso cai rau nws yuav tsum tau tsav ntawm kev khiav ceev nrog zuj zus ntawm kev txo ntawm lub zog li qhov ceev nce. Tu siab cov cav tsheb feem ntau muaj qhov chaw tuag uas lub cav tsis tuaj yeem tsav lub tsheb ntawm kev ceev. Qhov no yog vim muaj resonance hauv lub cev thiab nws txawv rau txhua yam khoom thiab tsim.
- Resonance - Stepper motors tsav mechanical tshuab thiab txhua yam tshuab tshuab yuav raug kev txom nyem los ntawm resonance. Resonance tshwm sim thaum tus tsav tsheb sib npaug ntau zaus ntawm lub cev thiab lub zog ntxiv rau qhov system nyhav nws qhov kev vibration thiab poob ntawm torque es nws tshaj tawm. Nyob rau hauv cov kev siv uas nyob ntev tshaj plaws yuav muaj teeb meem, kev tshawb nrhiav thiab thawb tshaj qhov ua siab ntev tshaj plaws ntawm lub cav xaij (motor speed speeds) yog qhov tseem ceeb. Txawm tias cov kev tso cai uas muaj peev xwm tiv thaiv kev vibration yuav tsum tsis txhob rov qab tswj qhov tsim nyog vim nws tuaj yeem txo qis lub neej ntawm lub cev.
- Theem Loj - Stepper motors muaj ob peb lub tswv yim tsav tsheb, nrog rau cov stepping micro uas pub me dua cov kauj ruam ua kom tiav los ntawm lub cev. Cov kauj ruam no tsis ua kom muaj qhov tseeb (theej cov kauj ruam ntawm cov kauj ruam muaj tsawg dua), tab sis lawv ua qhov kev ua qoj ua haujlwm qis dua qis dua. Stepper motors tsuas yog tsav tau yooj yim, thiab lub cav pom tsis txawv hauv ib kauj ruam los yog ib kauj ruam tag nrho. Rau kev khiav hauj lwm puv ntoob, tsav tsheb nrog lub kauj ruam loj nrog tag nrho cov kauj ruam yog feem ntau yuav tsum tau ua. Txawm li cas los xij, siv cov kauj ruam ntawm kauj ruam los ntawm tus kauj ruam ntawm tus kauj ruam accelerator acceleration tau txo qis suab nrov thiab kev vibration hauv lub cev.