Lub cev muaj zog puas yuav tsis hlawv yog tias siv qhov hloov pauv zaus?
1 Kev puas tsuaj los ntawm kev thauj khoom tsis zoo
Nws yog qhov tseeb tias qhov kev tiv thaiv Circuit Court ntawm lub inverter twb tiav lawm. Rau kev tiv thaiv ntawm qhov kim inverter module, txhua lub chaw tsim tshuaj paus inverter tau ua haujlwm ntau ntawm nws cov kev tiv thaiv Circuit Court, los ntawm cov zis tam sim no mus rau IGBT raj voltage poob nrhiav pom ntawm tsav Circuit Court, thiab sib zog ua kom muaj kev tiv thaiv kev tiv thaiv ceev tshaj nrog cov lus teb ceev tshaj plaws. ceev!
Los ntawm qhov ntsuas hluav taws xob mus rau qhov ntsuas tam sim no, los ntawm kev ntsuas qhov ntsuas kub mus rau theem tsis pom qhov tso zis, thiab lwm yam, tsis muaj hluav taws xob tiv thaiv hluav taws xob uas yog tsom thiab mob siab rau raws li lub inverter. Thaum tus neeg muag khoom inverter hais txog qhov ua tau zoo ntawm lub inverter, nws yuav tsum tau hais txog qhov kev tiv thaiv inverter, thiab feem ntau tsis nco qab cog lus rau tus neeg siv: Nrog lub inverter, nws txoj kev tiv thaiv kev ua haujlwm, koj lub cev muaj zog yuav tsis hlawv yooj yim. Tus neeg muag khoom no tsis paub tias qhov kev cog lus no yuav ua rau nws muaj kev nyuaj siab heev!
Puas yog lub cev muaj zog tiag tiag tsis hlawv thaum siv lub tshuab hloov zaus? Kuv cov lus teb yog: Piv nrog rau cov khoom siv fais fab ntawm kev lag luam zaus, lub cev muaj zog feem ntau yuav hlawv tawm thaum siv lub tshuab hloov pauv, thiab qhov yooj yim hlawv ntawm lub cev muaj zog ua rau inverter module ntawm zaus converter kuj yooj yim rau "sau tawm" ua ke. Lub rhiab heev overcurrent tiv thaiv Circuit Court ntawm zaus converter yog tsis muaj kev pab ntawm no thiab tsis ua lub luag hauj lwm. Qhov no yog ib qho tseem ceeb sab nraud ua rau kev puas tsuaj rau lub zaus converter module. Cia kuv qhia koj vim li cas.
Lub cev muaj zog tuaj yeem khiav hauv lub zog zaus. Txawm hais tias qhov khiav tam sim no me ntsis loj dua qhov ntsuas tam sim no, muaj qee qhov kub nce tom qab ua haujlwm ntev. Qhov no yog lub cev muaj zog. Nws tuaj yeem khiav ua ntej nws hlawv. Tab sis tom qab txuas mus rau lub zaus converter, nws yuav nquag overloaded thiab khiav tsis tau. Qhov no tsis yog qhov loj.
Lub cev muaj zog tuaj yeem khiav hauv lub zog zaus. Cov neeg siv tau siv nws ib txwm siv tau ntau xyoo. Thov ua tib zoo mloog lo lus "ntau xyoo". Cov neeg siv xav kom txuag tau cov nqi hluav taws xob los yog xav tau kev hloov pauv zaus vim kev hloov pauv ntawm cov txheej txheem. Tab sis tom qab txuas mus rau lub zaus hloov pauv, OC yuam kev yuav nquag dhia. Qhov no yog qhov zoo. Kev tiv thaiv raug kaw thiab lub module tsis tawg.
Qhov txaus ntshai yog tias lub inverter tsis tam sim ntawd mus rau OC txhaum, tab sis tsis muaj laj thawj thaum lub sijhawm ua haujlwm - tom qab tsuas yog peb lossis ob hnub ntawm kev ua haujlwm, lub module tawg thiab lub cev muaj zog hlawv. Tus neeg siv tau cem tus neeg muag khoom: Lub inverter koj nruab yog qhov tsis zoo thiab hlawv kuv lub cev, yog li koj yuav tsum them nyiaj rau kuv lub cev muaj zog!
Ua ntej no, lub cev muaj zog zoo li zoo tiag tiag thiab khiav tau zoo. Kev ntsuas tam sim no tau ntsuas, thiab vim tias lub nra hnyav, nws tsuas yog mus txog ib nrab ntawm cov ntsuas tam sim no; Peb-theem fais fab mov tau ntsuas, 380V, thiab nws yog qhov sib npaug thiab ruaj khov. Nws zoo nkaus li tias lub inverter puas lawm, thiab lub cev muaj zog tau puas lawm.
Yog tias kuv nyob ntawd, kuv yuav ncaj ncees zoo li no: Tsis txhob cem lub inverter, nws yog koj lub cev muaj zog uas twb "kawg mob" thiab tam sim ntawd tawg, thiab lub inverter puas lawm!
Lub rwb thaiv tsev ntawm lub cev muaj zog windings tau txo qis heev vim tias lub cev muaj zog ua haujlwm kub nce thiab noo noo, thiab txawm tias muaj qhov tsis zoo ntawm cov rwb thaiv tsev, uas yog nyob rau ntawm qhov tseem ceeb ntawm qhov hluav taws xob tawg. Nyob rau hauv cov xwm txheej ntawm lub zog zaus fais fab mov, lub cev muaj zog winding input yog peb-theem 50Hz sine yoj voltage, induced voltage generated los ntawm winding kuj tsawg, thiab surge tivthaiv nyob rau hauv cov kab yog me me. Kev txo qis ntawm cov rwb thaiv tsev ntawm lub cev muaj zog tuaj yeem tsuas yog coj qhov tsis txaus ntseeg "kua tam sim no", tab sis qhov tshwm sim ntawm qhov hluav taws xob tawg tseem tsis tau tshwm sim ntawm qhov hloov pauv thiab theem ntawm winding, thiab lub cev muaj zog tseem "ua haujlwm ib txwm".
Nws yuav tsum tau hais tias raws li qib ntawm rwb thaiv tsev laus zuj zus ntxiv, txawm tias nws tseem nyob hauv lub zog siv hluav taws xob, nws ntseeg tau tias nyob rau yav tom ntej, lub cev muaj zog yuav kawg hlawv vim qhov hluav taws xob tawg ntawm theem lossis windings tshwm sim los ntawm rwb thaiv tsev laus. Tab sis qhov teeb meem yog tias nws tsis tau hlawv tam sim no.
Tom qab txuas mus rau lub inverter, lub hwj chim mov tej yam kev mob ntawm lub cev muaj zog tau ua "phem": lub PWM waveform tso zis los ntawm lub inverter yog ib tug cab kuj voltage ntawm ob peb kHz los yog txawm ntau tshaj kaum kHz, thiab ntau yam ntawm harmonic voltage kuj yuav. generated nyob rau hauv lub motor winding fais fab mov Circuit Court.
Los ntawm cov yam ntxwv inductance, nws tuaj yeem pom tias qhov kev hloov pauv ceev ntawm qhov tam sim no ntws los ntawm inductor, qhov siab dua qhov induced voltage ntawm inductor. Qhov induced voltage ntawm lub cev muaj zog winding yog siab dua li ntawm lub hwj chim zaus fais fab mov (public account: Pump Butler). Lub rwb thaiv tsev tsis zoo uas tsis tuaj yeem raug nthuav tawm thaum lub sijhawm siv hluav taws xob zaus hluav taws xob tsis tuaj yeem tiv taus qhov cuam tshuam ntawm induced voltage nyob rau hauv high-frequency carrier, yog li qhov voltage breakdown ntawm lub lem los yog theem ntawm lub winding tshwm sim. Lub luv luv Circuit Court ntawm cov theem thiab lem ntawm lub cev muaj zog winding ua rau ib tug tam sim ntawd luv luv Circuit Court ntawm lub motor winding. Thaum lub sijhawm ua haujlwm, lub module tawg thiab lub cev muaj zog hlawv.
Nyob rau hauv thawj theem ntawm pib lub inverter, vim hais tias cov zis zaus thiab voltage yog ob qho tib si nyob rau hauv ib tug kuj tsis tshua muaj amplitude, thaum muaj ib tug txhaum nyob rau hauv lub load motor, txawm hais tias ib tug loj tso zis tam sim no yog tshwm sim, qhov tam sim no feem ntau nyob rau hauv tus nqi ntsuas, Tam sim no nrhiav tau hluav taws xob hluav taws xob tau qhib rau lub sijhawm, thiab lub inverter siv qhov kev tiv thaiv kaw, thiab lub module tsis muaj kev phom sij ntawm kev tawg.
Txawm li cas los xij, yog tias peb-theem tso zis voltage thiab zaus ncav cuag lub siab amplitude thaum khiav ntawm qhov nrawm (lossis ze rau qhov nrawm), yog tias muaj hluav taws xob tawg hauv lub cev muaj zog winding lub sijhawm no, lub zog loj loj yuav raug tsim tam sim ntawd, thiab lub inverter module yuav tsis tuaj yeem tiv taus nws thiab tawg thiab puas ua ntej qhov kev kuaj xyuas tam sim no tau qhib.
Los ntawm qhov no, nws tuaj yeem pom tias qhov kev tiv thaiv Circuit Court tsis yog omnipotent, thiab ib qho kev tiv thaiv Circuit Court muaj nws "tsis muaj zog". Lub inverter tsis muaj zog tiv thaiv qhov kev puas tsuaj tam sim ntawd ntawm lub cev muaj zog winding thaum lub sijhawm ua haujlwm puv ceev, thiab nws tsis tuaj yeem ua lub luag haujlwm tiv thaiv zoo. Tsis tsuas yog lub inverter tiv thaiv Circuit Court, tab sis ib qho kev tiv thaiv lub cev muaj zog tsis tuaj yeem muab kev tiv thaiv zoo tiv thaiv cov teeb meem tam sim ntawd. Thaum xws li tam sim no faults tshwm sim, nws tsuas tuaj yeem tshaj tawm tias lub cev muaj zog "tuag".
Hom kev ua txhaum no yog qhov ua rau tuag taus rau lub inverter tso zis module ntawm lub inverter, thiab tsis muaj kev khiav tawm.
Lwm yam laj thawj los ntawm kev siv hluav taws xob lossis kev thauj khoom, xws li dhau-voltage, under-voltage, hnyav load, lossis txawm tias dhau-tam sim no tshwm sim los ntawm stalling, tuaj yeem tiv thaiv kev nyab xeeb ntawm module raws li qhov kev xav tau tias kev tiv thaiv Circuit Court ntawm inverter yog qhov qub, thiab qhov tshwm sim ntawm kev puas tsuaj module yuav raug txo kom tsawg. Kuv yuav tsis tham txog qhov no.
2. Module kev puas tsuaj los ntawm qhov tsis zoo inverter Circuit Court
1. Kev tsav tsheb tsis zoo yuav ua rau muaj kev puas tsuaj loj rau lub module
Los ntawm lub hwj chim mov hom ntawm lub tsav Circuit Court, nws yuav pom tau hais tias nws yog feem ntau powered los ntawm zoo thiab tsis zoo lub hwj chim khoom. +15V voltage muab qhov excitation voltage ntawm IGBT raj los qhib nws. -5V muab qhov txiav tawm hluav taws xob ntawm IGBT raj kom nws ntseeg tau thiab nrawm. Thaum +15V voltage tsis txaus lossis poob, lub raj IGBT txuas tsis tuaj yeem qhib. Yog hais tias lub module txhaum kev kuaj xyuas Circuit Court ntawm lub tsav Circuit Court kuj tuaj yeem ntes lub IGBT raj, lub module txhaum kev kuaj xyuas Circuit Court tuaj yeem tshaj tawm cov teeb liab OC sai li sai tau thaum lub inverter muab tso rau hauv kev ua haujlwm, thiab lub inverter siv cov kev tiv thaiv kaw, uas yuav luag tsis muaj teeb meem. mus rau module.
Yog hais tias tus -5V txiav tawm tsis zoo voltage tsis txaus los yog poob (ib yam li tus choj peb-theem rectifier, peb tuaj yeem ua ntej hais txog lub inverter tso zis Circuit Court raws li tus choj inverter, thiab cov hlab IGBT ua peb sab caj npab thiab peb lub caj npab qis dua, xws li IGBT hlab ntawm U-theem tus choj sab caj npab thiab U-theem qis choj caj npab.), thaum lub sab sauv (qis) choj caj npab ntawm txhua theem yog txhawb thiab tig. Nyob rau, qhov sib thooj qis (sab sauv) choj caj npab IGBT raj yuav raug them los ntawm cov khoom sib txuas-qhov rooj sib txuas ntawm lub IGBT raj mus rau lub rooj vag-emitter hlws ris capacitance vim poob ntawm qhov kev txiav tawm tsis zoo voltage, uas ua rau lub mis- conduction ntawm lub raj, thiab ob lub raj tsim ib qho luv luv rau DC fais fab mov! Qhov tshwm sim yog: cov modules tau tawg!
Kev poob ntawm qhov tsis zoo ntawm qhov kev txiav tawm tuaj yeem tshwm sim los ntawm kev puas tsuaj rau tus tsav tsheb IC, kev puas tsuaj rau lub raj qis ntawm lub zog tsav theem (feem ntau yog tsim los ntawm ob-theem kev sib txuas ua ke ntawm cov khoom siv hluav taws xob txuas ntxiv) tom qab tus tsav tsheb IC, kev sib txuas tsis zoo. ntawm qhov ua rau lub davhlau ya nyob twg cov hlau lead, lossis lub zog tsis zoo ntawm cov khoom siv hluav taws xob tsis zoo ntawm tus tsav tsheb Circuit Court lossis tsis ua haujlwm ntawm lub hwj chim lim capacitor. Thaum ib qho ntawm cov xwm txheej saum toj no tshwm sim, nws yuav ua rau mob hnyav rau lub module! Nws yog irreversible.
2. Txoj kev sib kis tsis zoo yuav ua rau muaj kev hem thawj rau lub module. Lub 6-channel PWM inverter pulse tso zis los ntawm CPU feem ntau xa mus rau lub tswv yim tus pin ntawm tus tsav tsheb IC los ntawm rau 6 inverting (feem ntau) buffers, los ntawm CPU mus rau tus tsav tsheb IC, thiab tom qab ntawd mus rau qhov kawg ntawm lub davhlau ya nyob twg. inverter module. Yog tias ib qho ntawm 6 lub teeb liab raug cuam tshuam, lub inverter yuav qhia txog OC txhaum. Lub raj hluav taws xob poob ntawm IGBT cov raj nyob rau hauv qis peb choj caj npab ntawm tus choj inverter yog kuaj pom thiab ua tiav los ntawm qhov kev kuaj xyuas qhov teeb meem thaum nws qhib. Cov hlab IGBT nyob rau sab saum toj ntawm peb tus choj caj npab muaj lub raj hluav taws xob poob hauv qhov me me ntawm inverters, thiab lub raj hluav taws xob poob hluav taws xob pom tau raug tshem tawm hauv feem ntau ntawm cov inverters. Thaum lub IGBT raj uas poob lub excitation mem tes tshwm sim muaj ib lub raj voltage nco nco Circuit Court, tom qab lub excitation mem tes ploj lawm, lub detection Circuit Court yuav qhia ib tug OC txhaum thiab lub inverter yuav kaw rau kev tiv thaiv; (2) Lub inverter yuav muaj theem sib txawv. Lub IGBT raj uas poob lub siab lub ntsws yog lub raj tsis muaj lub raj hluav taws xob poob hluav taws xob tshawb pom. Tsuas yog qhov kev txiav tawm tsis zoo siab tshwm sim, uas tuaj yeem ua rau nws ntseeg tau txiav tawm. The theem choj caj npab tsuas muaj ib nrab-yoj tawm, uas ua rau lub inverter khiav hauv theem sib txawv. Yog li ntawd, ib qho DC tivthaiv yog tsim nyob rau hauv lub cev muaj zog winding, uas kuj tsim ib tug loj surge tam sim no (public account: Pump Butler), ua rau lub module cuam tshuam thiab puas! Txawm li cas los xij, qhov tshwm sim ntawm kev puas tsuaj yog qis dua thawj qhov laj thawj.
Yog tias txoj kev sib kis ntawm cov mem tes no yeej ib txwm tawg, txawm tias lub module txhaum Circuit Court tsis tuaj yeem ua lub luag haujlwm, qhov kev kuaj xyuas tam sim no xws li kev sib nrig sib inductor tuaj yeem ua lub luag haujlwm thiab tuaj yeem ua lub luag haujlwm tiv thaiv. Txawm li cas los xij, nws ntshai tias txoj kev sib kis no yuav raug txiav tawm ib ntus vim yog qhov tsis zoo xws li kev sib cuag tsis zoo, thiab txawm tias muaj kev sib txuas tsis sib xws. Tam sim no kev tshawb nrhiav Circuit Court yog qhov tsis txaus ntseeg thiab tsis muaj sij hawm los cuam tshuam, ua rau lub inverter ua rau "sib cuam tshuam theem sib txawv" cov zis, ua rau muaj kev cuam tshuam loj tam sim no thiab ua rau lub module puas. Lub cev muaj zog yuav "dhia" nyob rau hauv lub xeev tso zis, ua lub suab "nias", thiab cov cua sov tsim thiab poob yuav nce ntau, thiab nws kuj yog ib qho yooj yim rau kev puas tsuaj.
3. Lub ntsuas hluav taws xob tam sim no thiab qhov ntsuas kub ntsuas ntsuas ntsuas hluav taws xob tsis ua haujlwm lossis tsis ua haujlwm, thiab lub module tsis tuaj yeem tiv thaiv overcurrent thiab overheating, yog li ua rau kev puas tsuaj rau lub module.
4. Tom qab lub zog cia capacitor muaj peev xwm ntawm lub ntsiab DC Circuit Court txo qis lossis poob peev xwm, cov khoom siv hluav taws xob ntawm DC Circuit Court voltage nce. Tom qab lub inverter pib, nws tsis pom tseeb nyob rau hauv tsis muaj load thiab tsis muaj load, tab sis nyob rau hauv lub load pib txheej txheem, lub Circuit Court voltage surges, lub inverter module tawg thiab puas, thiab kev tiv thaiv Circuit Court kuj poob.
Rau inverters uas tau ua haujlwm tau ntau xyoo, tom qab lub module puas lawm, kev tshuaj xyuas ntawm lub zog cia capacitor muaj peev xwm ntawm DC Circuit Court tsis tuaj yeem tsis quav ntsej. Kev ua tiav ntawm lub peev xwm tsis tshua muaj, tab sis thaum nws tshwm sim, nws yuav ua rau muaj kev puas tsuaj rau lub inverter module thaum lub sij hawm thauj khoom pib, uas yog qhov tseeb!
3. Ib qho me me ntawm cov khoom siv hluav taws xob hauv tsev uas tsis zoo thiab kev ua haujlwm tsis zoo muaj cov qauv uas yooj yim heev rau kev puas tsuaj. Yog lawm, nyob rau hauv xyoo tas los no, kev sib tw hauv kev lag luam inverter tau dhau los ua nruj heev, thiab cov txiaj ntsig ntawm inverters tau dhau los ua nqaim, tab sis kev sib tw ntawm lawv tus kheej cov khoom tuaj yeem txhim kho los ntawm kev txhim kho thev naus laus zis thiab txhim kho kev tsim khoom. Nws yog tsis tsim nyog los ua kom lawv cov lag luam sib faib los ntawm kev siv cov khoom qub los ua cov tshiab, cov khoom qis dua li cov khoom zoo, thiab txo cov peev txheej los txiav cov fab. Nws yog tus cwj pwm luv luv thiab luv luv. 1. Kev ua haujlwm tsis zoo thiab kev ua haujlwm tsis zoo ua rau muaj qhov tsis ua haujlwm ntawm lub inverter tiv thaiv Circuit Court. Lub inverter module tsis tuaj yeem tiv thaiv zoo los ntawm kev tiv thaiv Circuit Court, yog li ua rau qhov tshwm sim ntawm kev puas tsuaj ntawm module. 2. Kev xaiv lub peev xwm ntawm lub inverter module feem ntau yuav tsum ncav cuag ntau tshaj 2.5 npaug ntawm qhov ntsuas tam sim no kom ntseeg tau tias muaj kev nyab xeeb mus ntev. Piv txwv li, 30kW inverter nrog qhov ntsuas tam sim no ntawm 60A yuav tsum siv lub module ntawm 150A txog 200A. Kev siv 100A yog qhov tsawg heev. Tab sis qee cov tuam ntxhab twv kom siv 100A modules rau kev teeb tsa! Dab tsi yog qhov phem dua, kuj tseem muaj cov neeg siv cov laus thiab cov khoom siv tsis zoo. Hom inverter no tsis tsuas yog yooj yim rau kev puas tsuaj rau lub module thaum lub sij hawm ua hauj lwm, tab sis kuj feem ntau explodes thaum pib txheej txheem! Cov neeg ua haujlwm uas tau teeb tsa hom inverter rau ntawm qhov chaw tau ntshai thiab siv tus pas ntoo los nias lub pob pib ntawm lub vaj huam sib luag ua haujlwm los ntawm qhov deb.
Lub module uas muaj peev xwm me me yuav tsum muaj peev xwm khiav NW nyuam qhuav. Lub module yog overloaded thiab kev tiv thaiv Circuit Court yuav tsis siv (kev tiv thaiv los ntawm lub cim hwj chim muaj peev xwm ntawm lub inverter es tsis txhob ntawm lub peev xwm muaj peev xwm ntawm lub module). Nws yog qhov txawv txav tiag tiag uas lub module tsis tawg ntau zaus.
Hom tshuab no zoo li "kub" thaum nws thawj zaug tau teev tseg vim nws tus nqi qis, tab sis nws yuav tsis siv sij hawm ntev rau cov chaw tsim khoom lag luam poob.
Qhov thib peb yog vim li cas rau module puas yuav tsum tsis yog vim li cas. Kuv vam tias yav tom ntej, cov laj thawj rau kev puas tsuaj ntawm module tsuas yog thawj ob qho laj thawj.
Rau cov khoom siv hluav taws xob hauv tsev, qee zaum cov nplej ntawm cov nas tsuag ua rau tag nrho lub lauj kaub ntawm cov kua zaub. Muaj ntau lub inverters tseem zoo, tsis yog qis dua cov khoom txawv teb chaws, thiab cov khoom zoo thiab tus nqi qis.
