Yog tias koj ua haujlwm nrog lub tshuab hluav taws xob, koj tau hnov txog Siemens VFDs. Siemens VFD, los yog kev sib txawv zaus tsav, yog ib qho khoom siv uas tswj qhov ceev thiab lub zog ntawm lub tshuab hluav taws xob. Ib qho ntawm cov yam ntxwv tseem ceeb tshaj plaws ntawm Siemens VFD yog nws lub peev xwm overload. Siemens VFD overload muaj peev xwm tiv thaiv tus tsav thiab lub cev muaj zog ntawm kev puas tsuaj thaum lub load siab dhau. Hauv qhov blog no, peb yuav piav qhia seb Siemens VFD overload muaj peev xwm yog li cas, thermal qauv ua haujlwm li cas hauv Siemens VFD, thiab yuav ua li cas nkag siab Siemens VFD txoj kev nkhaus. Peb tseem yuav hais txog cov teeb meem thiab cov kev daws teeb meem los pab koj kom tau txais txiaj ntsig zoo tshaj plaws ntawm koj Siemens VFD.
Siemens VFD Overload Capability yog dab tsi?
Siemens VFD overload muaj peev xwm yog lub peev xwm ntawm qhov sib txawv zaus tsav los tuav lub nra uas siab dua nws cov peev xwm ntsuas rau qee lub sijhawm. Txhua Siemens VFD muaj qhov ntsuas ntsuas, uas yog qhov siab tshaj plaws uas nws tuaj yeem ua haujlwm tsis tu ncua yam tsis muaj cua sov lossis puas. Thaum lub load tshaj qhov ntsuas no, Siemens VFD lub overload tiv thaiv kicks nyob rau hauv tiv thaiv kev puas tsuaj. Cov yam ntxwv no yog qhov tseem ceeb rau kev siv hauv kev lag luam, qhov twg cov motors feem ntau ntsib kev hloov pauv sai sai, xws li twj, kiv cua, thiab conveyors. Siemens VFD overload muaj peev xwm ua kom ntseeg tau tias lub tsav thiab lub cev muaj zog tuaj yeem tswj cov khoom siv dhau ib ntus yam tsis ua haujlwm.
Txhais ntawm Siemens VFD Overload Capability
Cias muab, Siemens VFD overload muaj peev xwm yog tus tsav lub peev xwm los zam dhau lub sijhawm luv luv. Piv txwv li, ntau tus qauv Siemens VFD, zoo li SINAMICS V20, tuaj yeem tuav 150% ntawm lawv cov nqi tshaj 60 vib nas this. Qee cov qauv kuj muaj qhov chaw qis tshaj, xws li 110% ntawm cov zis tam sim no rau 60 vib nas this hauv 300-thib ob lub voj voog. Qhov no txhais tau hais tias yog tias lub cev muaj zog load dheev dhia mus rau 150% ntawm nws cov khoom ib txwm muaj, Siemens VFD yuav khiav mus rau 60 vib nas this ua ntej kaw los tiv thaiv nws tus kheej thiab lub cev muaj zog. Lub qhov rais luv luv no muab sijhawm rau koj los kho cov load lossis kho qhov teeb meem ua ntej kev puas tsuaj tshwm sim.
Vim li cas Siemens VFD Overload Capability Matters
Siemens VFD overload muaj peev xwm yog qhov tseem ceeb rau ob qho laj thawj tseem ceeb: kev tiv thaiv cov cuab yeej thiab ua kom cov khoom tsim tau. Yog tsis muaj qhov tshwj xeeb no, tam sim ntawd overload tuaj yeem hlawv tawm Siemens VFD lossis lub cev muaj zog, ua rau kev kho kim thiab poob qis. Hauv kev lag luam chaw, txawm tias lub sijhawm luv luv ntawm kev poob qis tuaj yeem raug nqi nyiaj ntau. Siemens VFD overload muaj peev xwm kuj pab nrog Siemens VFD overload muaj peev xwm rau cov motors, vim nws tiv thaiv cov motors ntawm overheating thiab hnav tawm sai dua. Los ntawm kev tuav cov overloads ib ntus, Siemens VFD ua kom koj cov haujlwm ua haujlwm tau zoo thiab ua kom lub neej ntev ntawm koj cov khoom siv.
Thermal Modeling hauv Siemens VFD
Yuav kom nkag siab txog Siemens VFD muaj peev xwm tshaj tawm, koj thawj zaug yuav tsum paub txog thermal qauv. Thermal modeling yog ib feem tseem ceeb ntawm yuav ua li cas Siemens VFD tiv thaiv nws tus kheej thiab lub cev muaj zog ntawm overload. Siemens VFD siv thermal qauv los taug qab qhov kub ntawm nws cov khoom siv sab hauv thiab lub cev muaj zog. Qhov no yuav pab tus tsav txiav txim seb thaum twg nws muaj kev pheej hmoo ntawm overheating thiab thaum twg yuav ua rau muaj kev tiv thaiv overload. Cia peb rhuav tshem cov qauv thermal yog dab tsi thiab nws ua haujlwm li cas hauv Siemens VFD.
Siemens VFD Thermal Modeling Basics
Thermal modeling nyob rau hauv Siemens VFD yog ib txoj hauv kev los xam thiab saib xyuas cov cua kub hauv lub tsav thiab lub cev muaj zog. Thaum Siemens VFD khiav, nws cov khoom sab hauv (zoo li lub inverter) thiab lub cev muaj zog ua kom sov. Yog tias qhov kub no tsim ntau dhau, nws tuaj yeem ua rau cov khoom puas. Cov qauv thermal hauv Siemens VFD siv cov ntaub ntawv xws li lub zog lub cev muaj zog, tam sim no, thiab qhov kub thiab txias los kwv yees qhov kub npaum li cas tau tsim thiab sai npaum li cas nws tawg. Rau Siemens tus qauv motors, tus qauv thermal yog qhov tseeb heev, tab sis rau thib peb- tog motors, koj tuaj yeem siv tsis xws li P1910 los khiav lub cev muaj zog tsis siv neeg- qhia, uas ua rau cov qauv thermal ntau meej.
Yuav Ua Li Cas Thermal Modeling Ua Haujlwm hauv Siemens VFD
Cov qauv thermal hauv Siemens VFD ua haujlwm los ntawm kev soj ntsuam tas li ntawm lub cev muaj zog tam sim no thiab siv qhov ntsuas I²t los taug qab cov cua sov. I²t stands rau "tam sim no squared multiplied los ntawm lub sij hawm," thiab nws yog ib txoj kev los ntsuas lub tshav kub generated los ntawm hluav taws xob tam sim no. Siemens VFD piv tus nqi I²t rau ib qho kev txwv ( khaws cia hauv qhov tsis xws li P0604 rau MM440 qauv) kom pom tias cov cua sov tau dhau los. Yog tias qhov kev txwv dhau lawm, Siemens VFD yuav ua haujlwm, xws li suab lub tswb lossis tripping (kaw) kom tsis txhob muaj cua sov. Cov txheej txheem no tshwm sim nyob rau lub sijhawm tiag tiag, yog li Siemens VFD tuaj yeem teb sai sai rau kev hloov pauv hauv kev thauj khoom thiab kub.
Txoj kev Curves rau Siemens VFD
Txoj kev nkhaus yog lwm qhov tseem ceeb ntawm Siemens VFD muaj peev xwm tshaj. Siemens VFD mus txawv tebchaws nkhaus yog ib daim duab uas qhia tau hais tias ntev npaum li cas tus tsav tuaj yeem tswj ntau theem ntawm overload ua ntej tripping. Cov kev nkhaus no pab koj nkag siab txog Siemens VFD cov kev txwv ntau dhau thiab npaj koj cov haujlwm raws li. Kev kawm yuav ua li cas nyeem Siemens VFD mus ncig ua si nkhaus yog qhov tseem ceeb rau kev siv koj lub tsav kom muaj kev nyab xeeb thiab zoo.
Siemens VFD Trip Curves yog dab tsi?
Siemens VFD txoj kev mus ncig yog lub sijhawm-khoov tam sim no uas qhia txog kev sib raug zoo ntawm cov khoom siv tam sim no (raws li feem pua ntawm cov ntsuas tam sim no) thiab lub sijhawm nws siv rau Siemens VFD mus ncig. Qhov nkhaus muaj ob qhov tseem ceeb: qhov ntev - lub sijhawm ua haujlwm thiab luv - lub sijhawm ua haujlwm. Qhov ntev - lub sij hawm ib feem ntawm qhov nkhaus qhia tau hais tias lub sij hawm overload mus txawv tebchaws rau qis theem ntawm overload (xws li 110% mus rau 150% ntawm cov ntsuas tam sim no). Lub sijhawm luv luv - ntu qhia lub sijhawm mus ncig rau ntau dua (xws li 180% ntawm cov ntsuas tam sim no). Piv txwv li, Siemens VFD tuaj yeem taug kev tom qab 60 vib nas this ntawm 150% dhau ntawm tab sis tsuas yog 10 vib nas this ntawm 180% dhau.
Yuav Ua Li Cas Nyeem Siemens VFD Trip Curves
Nyeem Siemens VFD mus txawv tebchaws nkhaus yog yooj yim thaum koj paub tias yuav nrhiav dab tsi. Lub x-axis (kab kab rov tav) qhia cov overload tam sim no raws li feem pua ntawm Siemens VFD qhov ntsuas tam sim no. Lub y-axis ( kab ntsug) qhia lub sijhawm hauv vib nas this lossis feeb. Txhawm rau siv qhov nkhaus, nrhiav qhov feem pua ntawm cov khoom siv ntau dhau ntawm koj lub cev muaj zog ntawm x-axis, tom qab ntawd ua raws li qhov nkhaus mus rau y-axis kom pom tias Siemens VFD ntev npaum li cas tuaj yeem tswj tau qhov overload ua ntej tripping. Piv txwv li, yog tias koj Siemens VFD txoj kev mus ncig ua si qhia tau hais tias 150% overload sib haum mus rau 60 vib nas this, koj paub tias tus tsav yuav kaw tom qab 60 vib nas this yog tias lub load tseem nyob ntawd. Qhov no pab koj kho koj cov haujlwm kom tsis txhob poob ntawm Siemens VFD.
Feem ntau ua rau Siemens VFD Overload Trips
Txawm tias muaj zog Siemens VFD overload muaj peev xwm, overload mus txawv tebchaws tseem tuaj yeem tshwm sim. Nkag siab txog qhov ua rau Siemens VFD overload mus ncig ua si tuaj yeem pab koj tiv thaiv lawv thiab ua kom koj cov khoom siv khiav. Cia peb saib cov laj thawj feem ntau rau kev mus ncig ntau dhau hauv Siemens VFDs.
Sab nraud Factors
Ntau qhov kev mus ncig ntau dhau yog tshwm sim los ntawm lwm yam sab nraud sab nraud Siemens VFD nws tus kheej. Ib qho laj thawj feem ntau yog lub cev muaj zog uas yog overloaded los yog daig (tshem). Yog tias lub cev muaj zog tsis tuaj yeem tig dawb (vim yog lub kiv cua thaiv lossis hnav cov kabmob), nws yuav kos ntau dua tam sim no, ua rau Siemens VFD kev tiv thaiv overload. Lwm qhov tseem ceeb sab nraud yog qhov ua kom txias tsis zoo. Yog tias Siemens VFD lub kiv cua txias tsis ua haujlwm lossis ib puag ncig kub dhau (siab tshaj 40 degree), tus tsav yuav dhau los ua kom sov dua, ua rau muaj kev mus ncig ntau dhau. Txhua 1℃nce hauv ambient kub siab tshaj 40℃txo Siemens VFD lub peev xwm los ntawm 5%. Cov teeb meem ntawm cov khoom siv hluav taws xob, xws li qhov hloov pauv ntawm qhov hluav taws xob ntau tshaj ± 10%, tuaj yeem ua rau kev mus ncig ntau dhau.
Cov teeb meem Parameter
Qee zaum, kev mus ncig ntau dhau yog tshwm sim los ntawm qhov tsis raug tsis raug teeb tsa hauv Siemens VFD. Piv txwv li, yog tias koj teeb tsa lub zog ntsuas lub zog (P0307) tsis raug, Siemens VFD yuav siv cov qauv thermal tsis raug, ua rau muaj kev tsis ncaj ncees lawm. Lwm qhov yuam kev yog teeb tsa lub sijhawm nrawm (P1120) luv luv, tshwj xeeb tshaj yog rau cov cuab yeej loj xws li twj lossis kiv cua. Lub sij hawm acceleration luv luv ua rau lub cev muaj zog rub tawm tam sim no, uas tuaj yeem ua rau Siemens VFD tiv thaiv overload. Txhawm rau zam qhov no, teem lub sijhawm nrawm kom tsawg kawg 10-15 vib nas this rau cov khoom hnyav. Kev tiv thaiv overload tsis raug coefficient (P0640) tuaj yeem ua rau muaj kev mus ncig.
Yuav Ua Li Cas Tiv Thaiv Siemens VFD Overload Trips
Tiv thaiv Siemens VFD overload mus txawv tebchaws yog ib qho yooj yim nrog ob peb kauj ruam yooj yim. Los ntawm ua raws li cov lus qhia no, koj tuaj yeem ua rau koj lub Siemens VFD overload muaj peev xwm thiab txo qis sijhawm.
Ua ntej, xyuas lub cev muaj zog thiab cov tshuab ua haujlwm tsis tu ncua. Xyuas kom lub cev muaj zog tsis daig thiab cov bearings zoo -lubricated. Siv ib lub megohmmeter los xyuas lub cev muaj zog winding rwb thaiv tsev (yog tias nws tsawg dua 1 MΩ, nws yuav tsum tau kho). Thib ob, ua kom zoo dua Siemens VFD's parameter nqis. Xyuas kom meej tias tsis zoo li P0307 (lub cev muaj zog ntsuas lub zog) thiab P0304 (lub cev muaj zog ntsuas tam sim no) phim lub cev muaj zog lub npe. Teem lub sij hawm acceleration (P1120) kom haum rau koj cov load. Thib peb, tswj cov cua txias kom zoo. Ntxuav lub Siemens VFD cov pa cua tsis tu ncua, thiab xyuas kom cov kiv cua txias ua haujlwm. Yog tias ib puag ncig kub, xav txog kev ntxiv cov khoom cua txias ntxiv. Thaum kawg, tsis txhob rov pib dua. Rov pib dua Siemens VFD yam tsis tau kho qhov laj thawj ntawm qhov kev mus ncig tuaj yeem ua rau lub cev puas tsuaj, xws li IGBTs.
Xaus
Siemens VFD overload muaj peev xwm yog qhov tseem ceeb uas tiv thaiv koj tsav thiab lub cev muaj zog ntawm kev puas tsuaj. Los ntawm kev nkag siab txog kev ua qauv thermal thiab kev ncig mus ncig, koj tuaj yeem siv koj Siemens VFD zoo dua thiab tsis txhob raug nqi qis. Thermal modeling nyob rau hauv Siemens VFD taug qab cua sov buildup los tiv thaiv overheating, thaum mus ncig teb chaws curves qhia koj ntev npaum li cas tus tsav yuav lis overloads. Feem ntau ua rau muaj kev mus ncig ntau dhau suav nrog lwm yam xws li cov teeb meem ntawm lub cev muaj zog thiab kev ua kom txias tsis zoo, nrog rau kev teeb tsa tsis raug. Los ntawm kev ua raws li cov lus qhia tiv thaiv, koj tuaj yeem ua kom koj Siemens VFD ua haujlwm tau zoo thiab ntseeg tau.
Txawm hais tias koj tab tom siv Siemens SINAMICS V20, G120, lossis lwm tus qauv, kev nkag siab Siemens VFD muaj peev xwm dhau yog qhov tseem ceeb kom tau txais txiaj ntsig ntau ntawm koj cov cuab yeej. Yog tias koj muaj lus nug txog koj Siemens VFD qhov chaw overload lossis xav tau kev pab daws teeb meem, sab laj nrog Siemens cov neeg siv phau ntawv lossis hu rau Siemens cov kws tshaj lij kev pabcuam. Nrog kev saib xyuas thiab kev nkag siab zoo, koj Siemens VFD yuav muab kev ua tau zoo rau xyoo tom ntej.
