Vim Li Cas Xaiv Peb
Pab neeg tshaj lij:Peb pab pawg kws tshaj lij muaj ntau xyoo dhau los hauv kev lag luam, thiab peb muab peb cov neeg siv khoom nrog kev txhawb nqa tsim nyog thiab cov lus qhia.
Cov khoom zoo:Peb cov khoom yog tsim los rau cov qauv siab tshaj plaws siv cov ntaub ntawv zoo tshaj plaws xwb. Peb xyuas kom meej tias peb cov khoom muaj kev ntseeg siab, muaj kev nyab xeeb thiab kav ntev.
24H online kev pabcuam:400 tus xov tooj kub yog qhib 24 teev nyob rau ib hnub. Fax, email, QQ, thiab xov tooj yog txhua yam thiab ntau txoj kev los txais cov neeg siv khoom teeb meem. Technical cov neeg ua haujlwm yog 24 teev hauv ib hnub los teb cov teeb meem ntawm cov neeg siv khoom.
One-stop solution:Muab kev txhawb nqa hauv tag nrho cov txheej txheem ntawm kev tshuaj xyuas, kev teeb tsa, commissioning, kev lees paub, kev lees paub kev ua haujlwm, kev ua haujlwm, kev saib xyuas thiab lwm yam kev coj ua kev qhia thiab kev cob qhia txog kev cog lus cov khoom raws sijhawm.
LED digital vaj huam sib luag
Keyboard huab cua ob kab LED zaub cheeb tsam, khiav raws li txoj cai qhia cheeb tsam thiab keyboard ua hauj lwm cheeb tsam, keyboard rau hauv yuav tsum tau muab ntsia rau sab nraum cov keyboard, sab nraud lead yog network cable.
Nres chav tsev
Braking unit, lub npe tag nrho ntawm "frequency converter exclusive zog noj braking unit", los yog "frequency converter exclusive energy feedback unit", feem ntau yog siv los tswj cov neeg kho tshuab load kuj hnyav, braking ceev yuav tsum ceev heev zaus.
Chav ntsuas
Lub tswv yim chav tsev yog ib hom tshwj xeeb nres chav tsev ntawm zaus converter. Nws yog tsuas yog siv nyob rau hauv kev sib txawv zaus ceev tswj system nrog loj inertia thiab tsav.
LED vaj huam sib luag
Digital zaub board, yooj yim rau cov ntaub ntawv sab hauv, tuaj yeem siv los tso saib cov ntaub ntawv sau thiab ua tiav hauv qhov program. LED zaub ntawm ntau yam ntaub ntawv, yog ib qho pheej yig tib neeg-tshuab interface.
Braking kuj rau VFD
Braking unit, tag nrho cov txheeb ze ntawm "frequency converter txawv zog noj braking unit", los yog "frequency converter one-of-a-hom power comments unit", feem ntau yog siv los tswj cov neeg kho tshuab load yog incredibly hnyav.
VFD Braking Unit thiab Braking Resistor
Chav nres tsheb
Lub luag haujlwm ntawm braking unit yog txuas rau lub zog siv hluav taws xob thiab xyuas kom lub dc Circuit Court tso tawm lub zog los ntawm thermal zog tom qab dhau los ntawm lub braking resistor thaum voltage UD ntawm dc Circuit Court tshaj li qhov txwv, xws li 660V lossis 710V. Lub braking unit yuav muab faib ua ob hom: Built-in hom thiab sab nraud hom. Cov qub yog tsim rau lub zog qis dav dav-hom VFD, thaum lub tom kawg yog tsim rau lub zog siab VFD lossis cov xwm txheej nrog tshwj xeeb braking.
Braking resistor
Braking resistor yog cov cab kuj siv los haus lub zog regenerative ntawm lub cev muaj zog nyob rau hauv daim ntawv ntawm lub zog tshav kub, nws muaj xws li ob qho tseem ceeb tsis kam ntawm tus nqi kuj thiab lub zog muaj peev xwm. Feem ntau, ripple kuj thiab aluminium alloy tsis kam yog feem ntau xaiv hauv engineering:
Lub ripple tsis kam txais cov ntsug saum npoo ripple los pab kom cov cua sov dissipation thiab txo cov kab mob parasitic inductance, siv cov nplaim hluav taws kub retardant inorganic txheej los tiv thaiv cov hlau tsis zoo los ntawm kev laus, yog li txuas nws lub neej kev pab cuam.
Lub aluminium alloy kuj muaj huab cua tsis kam thiab kev co kuj, yog qhov zoo tshaj li cov tsoos ceramic skeleton resistors thiab dav siv nyob rau hauv hnyav industrial tswj ib puag ncig nrog siab xav tau. Nws tuaj yeem ntsia tau rau hauv qhov chaw compact lossis ntxiv nrog cov radiators.
AC rau DC converter (rectifier): seem ntawm vfd Circuit Court tej zaum yuav muaj ib tug yooj yim diode rectifier, ib tug thyristor choj, los yog ib tug igbt rectifier (uas ua rau siv igbts ua ke nrog diodes). Nws converts taag zaus, tas voltage AC input los ntawm lub mains mus rau DC voltage. Peb-theem AC muab khoom yuav xav tau ib tug 6-pulse diode choj rau ib tug diode-raws li rectifier los yog ib tug khub ntawm ib tug rau-thyristor choj rau thyristor configuration. Nyob rau hauv cov ntaub ntawv ntawm ib tug igbt rectifier, ib tug 3-theem AC mov yuav tsum tau ib tug ua ke ntawm rau igbts (insulated-gate bipolar transistors) nrog rau diodes kom tso cai rau lub zog khiav nyob rau hauv ob qho tib si kev taw qhia.
DC bus link:Lub luag haujlwm tseem ceeb ntawm lub tsheb npav DC yog kom smoothen, khaws cia, thiab xa cov lim DC voltage rau lub inverter. Nws suav nrog lub txhab nyiaj loj capacitor thiab / lossis ib qho ntawm cov inductors. Cov capacitors smoothen tawm voltage ripples nyob rau hauv DC voltage teeb liab los ntawm lub rectifier unit.
Inverter:Chav tsev no suav nrog cov khoom siv hluav taws xob hloov pauv xws li igbts, thyristors, lossis lwm yam hluav taws xob transistors. Nws hloov cov lim DC voltage rov qab rau hauv AC voltage los pub cov kev sib txuas AC induction motor. Los ntawm kev siv pulse width modulation (pwm) cov txheej txheem, lub inverter muaj peev xwm hloov cov teeb liab DC rau hauv AC teeb liab thiab sib txawv ntawm cov zis zaus rau lub cev muaj zog.
Tswj Circuit Court:Txhua qhov sib txawv zaus tsav muaj xws li kev tswj cov logic circuitry siv los ntsuas qhov tsav. Qhov Circuit Court no muaj lub microprocessor-based tswj chav tsev uas ua haujlwm ntau yam xws li tswj lub cev muaj zog ceev, saib xyuas lub tswb, kuaj xyuas qhov tsis raug, thiab cuam tshuam cov vfd nrog ntau yam khoom siv siv cov kev sib txuas lus tshwj xeeb. Siv cov chav tsev no, tus neeg siv tuaj yeem tswj hwm lub cev muaj zog tswj, thiab pib / nres ua haujlwm, nrog rau tau txais cov lus qhia txog qhov tseeb ceev, kev noj tam sim no, thiab cov zis torque ntawm kev sib txuas AC lub cev muaj zog.
Yog vim li cas siv VFD
Txais VFD kom ua tau raws li qhov yuav tsum tau ua ntawm kev txhim kho cov khoom lag luam, txhim kho cov khoom zoo, txhim kho cov khoom siv automation, thiab txhim kho qhov chaw nyob. Qhov thib ob yog kom txuag hluav taws xob thiab txo cov nqi tsim khoom.
Soft start function
Qhov pib tam sim no ntawm ib lub cav sib xyaw feem ntau yog 5 mus rau 7 npaug ntawm qhov ntsuas tam sim no, uas muaj kev cuam tshuam zoo rau daim phiaj hluav taws xob. Nrog VFD qhov sib txawv siab pib, qhov pib tam sim no tsuas yog kwv yees li ob zaug ntawm qhov ntsuas tam sim no, thiab qhov pib torque tsis qis dua li qhov ntsuas torque, uas tuaj yeem pib ua haujlwm zoo thiab muaj txiaj ntsig.
Stepless ceev txoj cai thiab high precision ceev tswj
Piv txwv li, nyob rau hauv cov txheej txheem ntawm cov yas machinery, vim qhov sib txawv ntawm cov yam ntxwv ntawm yas, ntau yam khoom specifications thiab txawv ntau lawm txheej txheem yuav tsum tau, ntau zaus yuav tsum ceev tswj ntawm cov khoom machinery. VFD txoj kev ntseeg siab, siab precision thiab du stepless ceev tswj cov yam ntxwv ua rau yas machinery automation qib txhim kho.
Kev txawj ntse tswj
VFD muaj ntau lub tswv yim tswj kev ua haujlwm: Cov analog thiab digital tswj interfaces txuas ncaj qha rau cov khoos phis tawj, cov khoom siv hauv internet, plc program controllers, thiab kov cov ntxaij vab tshaus, ua kom yooj yim los tswj seb nws puas yog nyob rau ntawm qhov chaw ua haujlwm lossis chaw taws teeb pom kev.
Kev txuag hluav taws xob
Tom qab siv VFD kev tswj ceev, lub zog txuag ntawm cov kiv cua thiab cov twj tso kua mis yog qhov pom tseeb tshaj plaws, thiab lub zog txuag hluav taws xob tuaj yeem ncav cuag 20% txog 60%. Qhov no yog vim lub zog noj ntawm lub kiv cua twj tso kua mis yog proportional rau lub voos xwmfab ntawm qhov ceev. Thaum qhov nruab nrab ntws los ntawm tus neeg siv yog me me, qhov ceev ntawm lub kiv cua thiab lub twj tso kua mis qis, thiab lub zog txuag hluav taws xob kuj tseem ceeb heev. Thaum cov tsoos baffle thiab valve siv rau kev khiav dej num, lub zog tsis hloov ntau. Vim tias hom kev thauj khoom no yog kwv yees li 20% mus rau 30% ntawm tag nrho lub peev xwm ntawm ac lub cev muaj zog, kev txuag hluav taws xob ntawm VFD yog qhov tseem ceeb heev.
Power factor them nyiaj
Lub zog reactive tsis tsuas yog ua rau cov kab poob thiab cua sov ntawm cov cuab yeej siv, tab sis qhov tseem ceeb tshaj, lub zog ntawm lub zog raug txo, ua rau txo qis hauv lub zog ntawm daim phiaj. Ib tug loj npaum li cas ntawm reactive hwj chim yog noj nyob rau hauv txoj kab, thiab cov cuab yeej siv tsis tau. Tom qab siv qhov sib txawv zaus tsav, vim yog lub hauv paus lim capacitor ntawm VFD, lub zog reactive poob qis, thiab lub zog ua haujlwm ntawm daim phiaj hluav taws xob tau nce.
Lub resistor uas yog siv los ua kom qeeb lossis nres qhov ceev ntawm lub tshuab tshuab los ntawm kev tsim lub braking torque yog hu ua braking resistor. Cov resistors no yog tsim los nrog qee qhov tshwj xeeb xws li kev tiv thaiv & nruab nrab braking zog. Braking resistors nrog rau me me ohmic qhov tseem ceeb yuav pab tswj kev ceev ntawm lub cev muaj zog & yaj ntau dua cua sov.
Cov resistors no muab kev ntseeg siab dua nrog kev pabcuam tsawg dua. Yog li, cov resistors feem ntau yog xaiv los ntawm kev sib txhuam brakes los tswj cov motors. Lub braking resistor yuav tsum tau nyob qhov twg thaum muaj ntau zaus tripping ntawm tus tsav vim overvoltage, txo cov cuab yeej siv lub neej los yog tus nqi tu siab, los yog lub cev muaj zog thiab tsav puas thiab / los yog overheating. Feem ntau, peb paub tias cov khoom siv hluav taws xob siv hluav taws xob thiab siv los ua kom qeeb lossis nres lub tshuab hluav taws xob.
Lub hom phiaj ntawm lub braking resistor yog dissipate lub zog uas lub cev muaj zog generates thaum deceleration. Raws li lub braking resistor dissipates lub zog, nws pab tiv thaiv kev puas tsuaj rau lub tsav uas yuav tshwm sim vim overvoltage.
Dab tsi yuav tsum tau txiav txim siab thaum xaiv Braking Resistor?
Ob yam tseem ceeb hauv kev xaiv lub braking resistor yog qhov tsawg kawg nkaus tus nqi tiv thaiv thiab lub zog dissipation muaj peev xwm.
Yam tsawg kawg nkaus tus nqi kuj
Vfds uas siv lub nres resistor kuj tseem muaj "chopper circuit" lossis nres transistor. Thaum DC lub tsheb npav voltage tau siab dhau lawm, tus nres transistor shunts tam sim no los ntawm dc npav hla tus nres nres. Qhov no nres transistor circuitry muaj kev txwv tam sim no. Yog li cov chaw tsim khoom VFD feem ntau yuav sau tus nqi siab tshaj tam sim no thiab lub voj voog ua haujlwm.
Txij li thaum V=IR, yog tias qhov hluav taws xob tsis tu ncua ces qhov kev tiv thaiv me me yuav ua rau muaj qhov loj dua tam sim no. Piv txwv li, hais tias qhov max voltage yog tshaj-voltage theem ntawm 840VDC. Ib tus neeg siv tuaj yeem suav qhov tsawg kawg nkaus tiv thaiv kom tus nqi tam sim no hauv qab lub braking transistor qhov ntsuas max. Qhov tsawg kawg nkaus tus nqi tiv thaiv tsis cuam tshuam rau kev ua haujlwm ntawm cov resistor lossis nws lub peev xwm los dissipate lub zog.
Lub zog dissipation muaj peev xwm
Qhov thib ob yam thaum xaiv lub braking resistor yog lub zog dissipation. Braking resistors tau teev nrog lub zog ntau npaum li cas lawv tuaj yeem ua kom nyab xeeb yog siv tsis tu ncua PD). Lawv kuj sau peb qhov tseem ceeb rau lub luag haujlwm tsis tu ncua.
Thawj txoj hauv kev ua qhov no yog los ntawm kev suav. Nws muaj peev xwm xam lub zog tsim los ntawm lub cev muaj zog yog tias koj paub cov hauv qab no.
● Lub sijhawm loj ntawm inertia ntawm lub cev muaj zog thiab thauj khoom
● Lub cev muaj zog torque
● Kev hloov ceev
● Lub sij hawm ntawm deceleration
Txoj Cai Ua Haujlwm ntawm Braking Resistor
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub braking resistor yog, uas lub braking resistor pab nres lossis qeeb lub cev muaj zog los ntawm dissipating tshaj tawm hluav taws xob tsim los ntawm lub zog hluav taws xob decelerating. Lub zog dissipated no tuaj yeem ua haujlwm los ntawm tus resistor los xyuas kom meej tias qhov nce voltage yog khaws cia kom ruaj ntseg qib kom tsis txhob muaj kev puas tsuaj rau tus tsav. Yog li ntawd cov cuab yeej siv lub neej tuaj yeem txuas ntxiv, tso cai nrawm nrawm & zam qhov kev pheej hmoo ntawm overheating.
Lub hauv paus ntsiab lus qab lub braking resistor yog yooj yim heev. Thaum lub cev muaj zog nyob rau hauv kev ua haujlwm, nws rub tawm ntau qhov tam sim no los ntawm cov khoom siv. Thaum ib tug xav nres lub load txuas nrog lub cev muaj zog, ces txhua yam nws yuav tsum tau ua yog qhib los yog disconnect lub mov rau lub cev muaj zog. Qhov kev tawg me me hauv lub zog hluav taws xob no yuav ua rau muaj kev sib txuam ntawm lub zog los ntawm kev thauj khoom. Qhov no tshwm sim li cas? Nws yog vim hais tias lub cev muaj zog thaum dheev nres ua raws li inductor thiab tsis yog ib qho resistor.
Thaum lub inductive load xws li lub cev muaj zog yog tam sim ntawd disconnected los ntawm nws lub hwj chim qhov chaw, nws yuav siv sij hawm rau nws tso tawm nws lub zog khaws cia rov qab mus rau hauv lub hwj chim qhov chaw. Lub sijhawm no, yog tias tsis muaj kev tso cai rau kev tso tawm lub zog no, ces nws tuaj yeem ua rau muaj kev puas tsuaj loj ntawm cov khoom siv txuas nrog lub nra thiab tseem ua rau lub cev raug mob rau txhua tus neeg nyob ze. Txhawm rau zam cov xwm txheej zoo li no, peb siv braking resistors nyob rau hauv series nrog loads xws li cov motors uas yuav tsum tau nres tam sim ntawd thaum lawv khiav ntawm high speeds. Lub braking resistor pab hauv kev tso tawm lub zog khaws cia thiab yog li tiv thaiv kev puas tsuaj.
3 Txoj Kev Tiv Thaiv Kev Tiv Thaiv Braking los ntawm Kev Tshaj Tawm
Nres chopper transistor saib xyuas pawg thawj coj saib
Lub rooj tsavxwm no saib xyuas qhov tsis ua haujlwm luv luv hauv lub nres nres nres. Thaum kuaj pom qhov nres nres tsis ua haujlwm, qhov kev ua txhaum ntawm kev tsav tsheb tau tsim tawm uas ua rau muaj daim ntawv tshwj xeeb c relay. Lub kaw lus tswj yuav tsum tau tsim nyob rau hauv xws li ib txoj kev uas lub hwj chim raug tshem tawm ntawm lub tsav los yog resistor thaum no relay qhib.
Nres resistors nrog lub thermal hloov
Nres resistors tuaj yeem nruab nrog lub thermal hloov los kuaj xyuas qhov muaj peev xwm dhau qhov xwm txheej. Thaum lub resistor yog overloaded, nws sim dissipate cua sov ntau tshaj li nws tau tsim los ua. Nyob rau hauv cov ntaub ntawv no, lub thermal hloov yuav qhib thaum lub kub ntawm lub resistor kub heev.
Intrinsically-kev nyab xeeb braking resistors
Cov resistors tuaj nruab nrog kev tiv thaiv sab hauv uas yuav qhib, zoo ib yam li lub fuse, thaum overloaded. Qhov kev xaiv no tsis tas yuav muaj cov khoom siv kho vajtse ntxiv lossis cov cuab yeej tswj hwm vim qhov kev tiv thaiv yog tsim-hauv rau cov resistor.
Peb lub Hoobkas
Zhejiang Hertz Electric Co., Ltd., nrhiav tau nyob rau hauv 2014, yog high-tech enterprise specializing nyob rau hauv txoj kev loj hlob, tsim, muag, thiab tom qab-muag kev pab cuam, pab nruab nrab thiab high-end khoom manufacturers thiab industrial automation system integrators. Kev cia siab rau cov khoom siv ua haujlwm zoo thiab cov txheej txheem kev sim nruj, peb yuav muab cov neeg siv khoom nrog cov khoom xws li cov khoom siv hluav taws xob tsawg thiab nruab nrab voltage inverters, soft starters thiab servo tswj systems thiab cov kev daws teeb meem hauv kev lag luam.
Lub tuam txhab txhawb nqa lub tswv yim ntawm "muab cov neeg siv nrog cov khoom lag luam zoo tshaj plaws thiab kev pabcuam" los pab txhua tus neeg siv khoom. Tam sim no, nws tsuas yog siv rau metallurgy, tshuaj lom neeg kev lag luam, ntawv ua, tshuab thiab lwm yam lag luam.
Cov ntawv pov thawj
FAQ
Q: Lub hom phiaj tseem ceeb ntawm VFD yog dab tsi?
Q: VFD dynamic braking ua haujlwm li cas?
Q: Lub VFD puas tuaj yeem nres lub cev muaj zog?
Q: Koj puas yuav tsum siv lub zog sib txawv?
Q: VFD nres lub cev muaj zog li cas?
Q: VFD nres lub cev muaj zog li cas?
Q: Ua li cas VFD ua kom lub cev muaj zog?
Q: Dab tsi tswj qhov ceev ntawm VFD?
Q: Dab tsi yog qhov braking unit ntawm VFD?
Q: Ob hom VFD yog dab tsi?
Q: Kuv puas xav tau lub braking resistor nrog VFD?
Q: VFD nres lub cev muaj zog li cas?
Q: Dab tsi yog qhov zoo ntawm kev siv VFD?
Q: Dab tsi yog qhov ua haujlwm ntawm VFD nres?
Q: Cov txheej txheem tu rau VFD yog dab tsi?
Q: Koj puas xav tau lub braking resistor rau VFD?
Q: Dab tsi ua rau VFD hlawv tawm?
Q: Kuv yuav xaiv VFD nres resistor li cas?
Q: Dab tsi yog qhov txawv ntawm LED thiab VFD zaub?
Q: Dab tsi yog qhov tawg tiv thaiv hauv VFD?
Peb paub zoo tias yog ib qho ntawm VFD qhov chaw manufacturers thiab lwm tus neeg nyob hauv Suav teb. Nrog kev paub ntau, peb sov siab txais tos koj rau cov lag luam wholesale zoo VFD qhov chaw muag ntawm no los ntawm peb lub hoobkas. Tiv tauj peb kom paub meej ntxiv.