I. Kev Taw Qhia
Hauv kev lag luam automation, sib txawv - zaus drives (VFDs) thiab programmable logic controllers (PLCs) yog ob qho tseem ceeb tswj cov cuab yeej. Txhua tus muaj cov haujlwm tshwj xeeb thiab cov yam ntxwv thiab ua lub luag haujlwm tseem ceeb hauv kev lag luam automation. Tsab ntawv xov xwm no yuav muab cov ncauj lus kom ntxaws thiab sib piv ntawm qhov sib txawv ntawm - zaus tsav thiab programmable logic controllers los ntawm ntau qhov kev pom, suav nrog cov ntsiab lus, kev ua haujlwm, cov qauv tsim, cov yam ntxwv ua haujlwm, thiab cov xwm txheej ntawm daim ntawv thov, los pab cov nyeem kom nkag siab txog qhov sib txawv ntawm lawv.
II. Cov ntsiab lus thiab cov ntsiab lus ua haujlwm
Hloov pauv -Frequency Drive (VFD)
Qhov sib txawv -frequency drive (VFD) yog lub zog tswj cov cuab yeej uas siv cov cuab yeej sib txawv - zaus tshuab thiab microelectronics los tswj AC motors los ntawm kev hloov cov zaus ntawm lub cev muaj zog lub zog. Lub VFD feem ntau muaj kev kho (AC rau DC), lim dej, thim rov qab (DC rau AC), chav nres tsheb, tsav tsheb, chav kuaj xyuas, thiab microprocessor units. Los ntawm kev hloov cov IGBTs sab hauv, VFD kho cov zis voltage thiab zaus, muab lub cev muaj zog nrog lub zog hluav taws xob uas nws xav tau tiag tiag, yog li ua tiav kev txuag hluav taws xob thiab kev tswj ceev. Tsis tas li ntawd, VFDs muaj ntau yam kev tiv thaiv, suav nrog overcurrent, overvoltage, thiab overload tiv thaiv.
Programmable Logic Controller (PLC)
Lub Programmable Logic Controller (PLC) yog lub tshuab hluav taws xob digital tsim tshwj xeeb rau kev lag luam ib puag ncig. Nws siv lub cim xeeb programmable khaws cov lus qhia rau kev ua haujlwm zoo, kev tswj xyuas raws sijhawm, sijhawm, suav, thiab lej lej, thiab tswj ntau hom khoom siv tshuab lossis cov txheej txheem tsim khoom los ntawm digital lossis analog inputs thiab outputs. PLC yog lub chaw tswj hwm digital nrog lub microprocessor rau automation tswj, muaj peev xwm thauj khoom tswj cov lus qhia rau hauv lub cim xeeb rau kev khaws cia thiab ua tiav txhua lub sijhawm. Lub programmable maub los muaj cov haujlwm ua haujlwm xws li CPU, cov lus qhia thiab cov ntaub ntawv nco, cov tswv yim / tso zis cuam tshuam, cov khoom siv hluav taws xob, thiab digital- mus rau -analog hloov dua siab tshiab.
III. Cov qauv tsim thiab cov yam ntxwv ua haujlwm
Kev sib xyaw ua ke
Variable- zaus tsav: Feem ntau muaj lub rectifier, lim, inverter, braking unit, drive unit, detection unit, thiab microprocessor unit. Ntawm cov no, lub rectifier converts AC zog rau DC zog; lub lim yog siv los du DC voltage; lub inverter converts DC lub zog rau AC zog tsav lub cev muaj zog; lub braking unit muab braking torque thaum lub cev muaj zog decelerates los yog nres; lub tsev tsav, chav kuaj xyuas, thiab microprocessor unit yog lub luag haujlwm rau kev tswj thiab tswj kev ua haujlwm ntawm tag nrho cov tsav tsheb sib txawv.
Programmable Logic Controller (PLC): Feem ntau muaj cov haujlwm ua haujlwm xws li CPU, cov lus qhia thiab cov ntaub ntawv nco, cov khoom siv hluav taws xob / tso tawm, cov khoom siv hluav taws xob, thiab digital - mus rau -analog hloov dua siab tshiab. Ntawm cov no, CPU yog lub hauv paus tseem ceeb ntawm PLC, lub luag haujlwm rau kev ua tiav cov neeg siv cov kev pab cuam thiab tswj kev ua haujlwm ntawm tag nrho cov kab ke; cov kev qhia thiab cov ntaub ntawv nco yog siv los khaws cov neeg siv cov kev pab cuam thiab cov ntaub ntawv; I / O interfaces yog siv los txuas nrog cov khoom siv sab nraud thiab pauv cov ntaub ntawv; lub hwj chim muab lub zog ruaj khov rau PLC; thiab cov digital-rau-analog conversion unit yog lub luag hauj lwm rau converting analog signals rau digital signals lossis digital signals rau hauv analog signals.
Nta
Variable Frequency Drive (VFD): Nws lub luag haujlwm tseem ceeb yog tswj lub cev muaj zog ceev thiab lub zog los ntawm kev hloov cov zaus ntawm lub cev muaj zog, yog li ua tiav kev txuag hluav taws xob thiab kev tswj ceev. Tsis tas li ntawd, VFDs muaj ntau yam kev tiv thaiv kev ua haujlwm, xws li overcurrent, overvoltage, thiab overload tiv thaiv, kom ntseeg tau tias muaj kev nyab xeeb ntawm lub cev muaj zog.
Programmable Logic Controller (PLC): Nws lub luag haujlwm tseem ceeb yog ua kom muaj kev tswj xyuas qhov tseeb, kev tswj xyuas raws sijhawm, thiab kev tswj xyuas lub sijhawm ntawm cov cuab yeej siv tshuab los ntawm kev ua tiav cov neeg siv khoom. PLCs muaj kev hloov pauv siab thiab ua kom muaj zog; lawv tuaj yeem raug programmed thiab teeb tsa kom tau raws li qhov xav tau sib txawv, hloov mus rau ntau yam kev lag luam automation tswj tshuab.
IV. Daim ntawv thov Scenario
Ntau zaus tsav tsheb: Siv dav hauv cov ntawv thov uas yuav tsum tau hloov kho lub cev muaj zog thiab lub zog, xws li lub zog -txuag retrofits thiab ceev tswj rau cov cuab yeej xws li kiv cua, twj, thiab compressors. Tsis tas li ntawd, cov tsav tsheb sib txawv tuaj yeem siv tau hauv thaj chaw xws li kev tswj xyuas tsav tsheb rau hluav taws xob.
Programmable Logic Controllers: Siv dav hauv ntau yam kev lag luam automation tswj tshuab, xws li hauv kev tsim khoom, tshuaj engineering, hluav taws xob tsim hluav taws xob, thiab kev thauj mus los. PLCs tuaj yeem tsim kho thiab teeb tsa kom tau raws li cov kev xav tau tshwj xeeb, ua kom muaj kev tswj hwm thiab tswj cov cuab yeej siv tshuab.
V. Summary
Qhov sib txawv zaus tsav thiab programmable logic controllers txhua tus ua lub luag haujlwm tseem ceeb hauv kev lag luam automation. Txawm hais tias ob qho tib si yog cov cuab yeej tswj hwm, lawv muaj qhov sib txawv ntawm cov ntsiab lus ntawm cov ntsiab lus, kev khiav hauj lwm hauv paus ntsiab lus, cov qauv tsim, cov yam ntxwv ua haujlwm, thiab daim ntawv thov scenarios. Kev sib txawv ntawm cov tsav tsheb feem ntau yog siv los tswj lub cev muaj zog thiab lub zog kom ua tiav lub zog txuag thiab tswj kev ceev; programmable logic controllers, ntawm qhov tod tes, feem ntau yog siv los ua kom muaj kev tswj xyuas kev tswj xyuas, kev tswj xyuas raws sijhawm, thiab kev tswj xyuas lub sijhawm rau cov cuab yeej siv tshuab. Hauv kev siv cov tswv yim, nws yog ib qho tsim nyog los xaiv cov cuab yeej tswj kom tsim nyog raws li kev tswj hwm tshwj xeeb kom ua tiav cov txiaj ntsig tswj tau zoo.