Servo tsav tsheb,tseem hu ua "servo maub los" lossis "servo amplifier", yog ib hom kev tswj hwm siv los tswj servo motors. Nws muaj nuj nqi zoo ib yam li cov zaus converter ua ntawm AC motors zoo tib yam, thiab nws yog ib feem ntawm lub servo system. Feem ntau, servo motors yog tswj los ntawm peb txoj kev: txoj hauj lwm, ceev, thiab torque kom ua tiav high-precision positioning ntawm lub kis tau tus mob system.
1, Kev faib tawm ntawm servo motors
Muab faib ua ob pawg: DC thiab AC servo motors, AC servo motors tau muab faib ua asynchronous servo motors thiab synchronous servo motors. Tam sim no, AC systems tau maj mam hloov DC systems. Piv nrog rau DC systems, AC servo motors muaj qhov zoo xws li kev ntseeg siab, zoo cua sov dissipation, me me ntawm inertia, thiab muaj peev xwm ua hauj lwm nyob rau hauv high voltage tej yam kev mob. Vim tias tsis muaj txhuam thiab lub kauj iav, AC ntiag tug server system kuj tau dhau los ua qhov tsis muaj servo system. Cov motors siv nyob rau hauv nws yog brushless tawb asynchronous motors thiab ruaj khov hlau nplaum synchronous motors.
1. DC servo motors muab faib ua txhuam thiab txhuam tsis txhuam
① Brushless motors muaj tus nqi qis, qauv yooj yim, pib lub zog loj, kev tswj ceev nrawm, tswj tau yooj yim, thiab xav tau kev saib xyuas. Txawm li cas los xij, lawv yooj yim los tswj (hloov cov txhuam hniav), tsim hluav taws xob cuam tshuam, thiab muaj cov kev cai rau kev ua haujlwm ib puag ncig. Lawv feem ntau yog siv rau hauv cov nqi rhiab zoo tib yam kev lag luam thiab kev siv pej xeem;
② Brushless motors muaj me me, lub teeb yuag, cov zis loj, cov lus teb ceev ceev, kev kub ceev, me me inertia, ruaj khov torque thiab du kev sib hloov, kev tswj tsis yooj yim, kev txawj ntse, hloov tau yooj yim hauv hluav taws xob commutation txoj kev, tuaj yeem yog square yoj lossis sine yoj commutation, txij nkawm dawb, txuag hluav taws xob thiab txuag hluav taws xob, hluav taws xob hluav taws xob tsis tshua muaj hluav taws xob, hluav taws xob tsis tshua muaj siab, lub neej ua haujlwm ntev, thiab tsim nyog rau ntau qhov chaw.
2, Cov yam ntxwv ntawm ntau hom servo motors
1. Qhov zoo thiab qhov tsis zoo ntawm DC servo motors
Qhov zoo: Kev tswj ceev ceev, muaj zog torque ceev cov yam ntxwv, tswj txoj cai yooj yim, siv yooj yim, thiab tus nqi pheej yig.
Disadvantages: Txhuam commutation, ceev txwv, ntxiv tiv thaiv, tiam ntawm hnav hais (tsis haum rau plua plav-dawb thiab explosive ib puag ncig)
2. Qhov zoo thiab qhov tsis zoo ntawmAC servo lub cev muaj zog
Qhov zoo: Cov yam ntxwv zoo tswj ceev, kev tswj tau zoo tuaj yeem ua tiav thoob plaws tag nrho qhov nrawm, yuav luag tsis muaj oscillation, kev ua haujlwm siab tshaj 90%, tsis tshua muaj hluav taws xob, kev tswj kev kub ceev, kev tswj xyuas qhov tseeb (nyob ntawm qhov tseeb encoder), tuaj yeem ua tiav qhov torque tsis tu ncua hauv thaj chaw ua haujlwm, tsis tshua muaj zog, tsis muaj suab nrov, tsis muaj txhuam, tsis muaj kev saib xyuas (tsim rau qhov chaw tsis muaj plua plav thiab tawg).
Qhov tsis zoo: Kev tswj hwm yog qhov nyuaj, thiab cov tsav tsheb tsis zoo yuav tsum tau hloov kho ntawm qhov chaw los txiav txim siab PID tsis, yuav tsum tau txuas ntxiv.
Tam sim no, mainstream servo drives siv cov teeb liab teeb liab processors (DSP) raws li lub hauv paus tswj, uas muaj peev xwm ua tau raws li complex tswj algorithms, digitization, networking, thiab txawj ntse. Cov khoom siv hluav taws xob feem ntau siv cov tsav tsheb uas tsim los nrog cov khoom siv hluav taws xob ntse (IPM) ua lub hauv paus. IPM integrates tsav circuits nyob rau hauv thiab kuj muaj txhaum cai thiab tiv thaiv circuits rau overvoltage, overcurrent, overheating, undervoltage, thiab lwm yam. Mos pib circuits kuj ntxiv rau lub ntsiab Circuit Court kom txo tau cov kev cuam tshuam ntawm kev pib ntawm tus neeg tsav tsheb. Lub zog tsav lub zog ua ntej kho cov tswv yim peb-theem lossis lub zog loj los ntawm peb-theem tag nrho choj rectifier circuit kom tau txais lub zog DC sib thooj. Tom qab rectification, peb-theem lossis mains fais fab yog siv los tsav peb-theem ruaj khov hlau nplaum synchronous AC servo lub cev muaj zog los ntawm peb-theem sine PWM voltage qhov inverter rau zaus hloov dua siab tshiab. Tag nrho cov txheej txheem ntawm lub zog tsav tsheb tuaj yeem piav qhia yooj yim raws li AC-DC-AC txheej txheem. Lub ntsiab topology Circuit Court ntawm lub rectifier unit (AC-DC) yog ib tug peb-theem tag nrho tus choj uncontrolled rectifier circuit.
3,Servo system thaiv daim duab
1. Tsav tsheb thaiv
Lub servo tsav feem ntau suav nrog kev tswj xyuas hluav taws xob hluav taws xob, kev tswj xyuas hluav taws xob tseem ceeb hauv hluav taws xob, servo tso zis hluav taws xob, cov khoom siv hluav taws xob CN1, encoder interface CN2, thiab txuas nrog CN3. Kev tswj hluav taws xob hluav taws xob yog ib-theem AC fais fab mov, thiab lub zog hluav taws xob tuaj yeem ua ib theem lossis peb theem, tab sis nws yuav tsum yog 220V. Qhov no txhais tau hais tias thaum peb-theem input yog siv, peb-theem fais fab mov yuav tsum tau txuas nrog ib tug transformer transformer. Rau cov tsav tsheb uas tsis muaj zog, nws tuaj yeem tsav ncaj qha rau hauv ib-theem, thiab txoj kev sib txuas ib-theem yuav tsum tau txuas nrog R thiab S terminals. Nco ntsoov tsis txhob txuas lub servo lub cev muaj zog tawm U, V, thiab W mus rau lub ntsiab hluav taws xob hluav taws xob, vim tias nws yuav hlawv tawm tus neeg tsav tsheb. Qhov chaw nres nkoj CN1 feem ntau yog siv los txuas rau lub khoos phis tawj sab saud, muab cov tswv yim, tso tawm, encoder ABZ peb-theem tso zis, thiab cov zis analog ntawm ntau yam kev soj ntsuam cov cim.
2. Encoder thaiv
Los ntawm daim duab saum toj no, nws tuaj yeem pom tau tias peb tsuas yog siv 5 ntawm cuaj lub davhlau ya nyob twg, suav nrog ib lub xov hlau tiv thaiv, ob lub xov tooj hluav taws xob, thiab ob lub xov tooj sib txuas lus (+-), uas zoo ib yam li cov xaim ntawm peb lub tshuab encoder.
3. Chaw nres nkoj kev sib txuas lus
Tus neeg tsav tsheb txuas nrog lub khoos phis tawj sab saud xws li PLC thiab HMI los ntawm CN3 chaw nres nkoj, thiab tswj los ntawmMODBUS kev sib txuas lus. RS232 thiab RS485 tuaj yeem siv rau kev sib txuas lus.
Post lub sij hawm: Dec-15-2023
