Raws li lub ntiaj teb taug kev mus rau pem hauv ntej ntawm nws txoj kev nrhiav kev ruaj ntseg thiab huv lub zog daws teeb meem, lub hnub ci zog tau tshwm sim los ua tus thawj coj hauv kev sib tw rau lub neej yav tom ntej. Kev siv lub hnub ci kom muaj zog thiab rov ua dua tshiab, lub hnub ci photovoltaic (PV) tau txais txiaj ntsig zoo, ua rau txoj hauv kev rau kev hloov pauv zoo tshaj plaws hauv txoj kev peb tsim hluav taws xob. 
Hauv plawv ntawm txhua lub hnub ci PV yog ib qho tseem ceeb tivthaiv uas ua rau kev hloov ntawm lub hnub ci mus rau lub zog siv tau:hnub ci inverter. Ua raws li tus choj ntawm lub hnub ci vaj huam sib luag thiab daim phiaj hluav taws xob, hnub ci inverters ua lub luag haujlwm tseem ceeb hauv kev siv lub hnub ci kom zoo. Nkag siab txog lawv txoj hauv kev ua haujlwm thiab tshawb nrhiav lawv ntau hom yog qhov tseem ceeb rau kev nkag siab txog cov tshuab kho kom zoo nkauj tom qab lub hnub ci zog hloov dua siab tshiab. Haw Does ASolarIconverterWork? Lub hnub ci inverter yog ib qho khoom siv hluav taws xob uas hloov cov hluav taws xob ncaj qha (DC) hluav taws xob uas tsim los ntawm cov hnub ci vaj huam sib luag rau hauv hluav taws xob hloov tam sim no (AC) uas tuaj yeem siv los siv hluav taws xob hauv tsev thiab muab pub rau hauv daim phiaj hluav taws xob. Lub hauv paus ntsiab lus ua haujlwm ntawm lub hnub ci inverter tuaj yeem muab faib ua peb theem tseem ceeb: hloov dua siab tshiab, tswj, thiab tso zis. Hloov dua siab tshiab: Lub hnub ci inverter thawj zaug tau txais DC hluav taws xob tsim los ntawm lub hnub ci vaj huam sib luag. Qhov hluav taws xob DC no feem ntau yog nyob rau hauv daim ntawv ntawm qhov hloov pauv hluav taws xob uas txawv nrog qhov siv ntawm lub hnub ci. Lub inverter lub luag haujlwm tseem ceeb yog los hloov qhov sib txawv ntawm DC voltage mus rau qhov ruaj khov AC voltage haum rau kev noj. Cov txheej txheem hloov dua siab tshiab suav nrog ob lub ntsiab lus tseem ceeb: cov txheej txheem hluav taws xob hluav taws xob hloov hluav taws xob (feem ntau insulated-gate bipolar transistors lossis IGBTs) thiab lub tshuab hluav taws xob siab. Cov keyboards yog lub luag haujlwm rau kev hloov pauv sai ntawm DC voltage rau thiab tawm, tsim kom muaj cov teeb liab mem tes siab. Lub transformer ces nce qhov voltage mus rau qhov xav tau AC voltage theem. Tswj: Cov theem tswj ntawm lub hnub ci inverter xyuas kom meej tias cov txheej txheem hloov dua siab tshiab ua haujlwm zoo thiab nyab xeeb. Nws suav nrog kev siv cov sophisticated tswj algorithms thiab sensors los saib xyuas thiab tswj ntau yam tsis muaj. Qee qhov tseem ceeb ntawm kev tswj hwm muaj xws li: ib. Maximum Power Point Tracking (MPPT): Hnub ci vaj huam sib luag muaj qhov ua haujlwm zoo tshaj plaws hu ua qhov siab tshaj plaws lub zog taw tes (MPP), uas lawv tsim lub zog siab tshaj plaws rau lub hnub ci siv. MPPT algorithm tsis tu ncua kho qhov chaw ua haujlwm ntawm lub hnub ci vaj huam sib luag kom ua kom lub zog tso zis ntau tshaj plaws los ntawm kev taug qab MPP. b. Voltage thiab Zaus Regulation: Lub inverter tswj qhov system tswj qhov ruaj khov AC tso zis voltage thiab zaus, feem ntau ua raws li cov qauv ntawm daim phiaj siv hluav taws xob. Qhov no ua kom muaj kev sib raug zoo nrog lwm cov khoom siv hluav taws xob thiab tso cai rau kev sib txuas nrog cov kab sib chaws. c. Grid Synchronization: Daim phiaj-txuas hnub ci inverters synchronize theem thiab zaus ntawm AC tso zis nrog daim phiaj siv hluav taws xob. Qhov no synchronization ua rau lub inverter pub ntau lub zog rov qab rau hauv daim phiaj lossis kos lub zog ntawm daim phiaj thaum lub hnub ci tsis txaus. Cov zis: Nyob rau theem kawg, lub hnub ci inverter xa cov hluav taws xob AC hloov mus rau cov khoom siv hluav taws xob lossis kab sib chaws. Cov zis tuaj yeem siv ob txoj hauv kev: ib. On-Grid lossis Grid-Tied Systems: Hauv cov kab sib txuas-khi, lub hnub ci inverter pub AC hluav taws xob ncaj qha rau hauv daim phiaj siv hluav taws xob. Qhov no txo qis kev vam khom ntawm fossil roj-raws li cov chaw tsim hluav taws xob thiab tso cai rau kev ntsuas qhov ntsuas, qhov twg cov hluav taws xob ntau dhau los ua rau nruab hnub tuaj yeem suav tau thiab siv rau lub sijhawm hnub ci qis. b. Off-Grid Systems: Hauv cov kab hluav taws xob off-grid, lub hnub ci inverter them lub txhab nyiaj roj teeb ntxiv rau kev muab lub zog rau cov khoom siv hluav taws xob. Cov roj teeb khaws cia lub hnub ci ntau dhau, uas tuaj yeem siv tau thaum lub sijhawm hnub ci qis lossis hmo ntuj thaum lub hnub ci vaj huam sib luag tsis tsim hluav taws xob. Cov yam ntxwv ntawm Solar Inverters: Kev ua tau zoo: Hnub ci inverters yog tsim los ua haujlwm nrog kev ua haujlwm siab kom ua kom lub zog tawm los ntawm lub hnub ci PV system. Kev ua haujlwm siab dua ua rau poob qis zog thaum lub sij hawm hloov dua siab tshiab, kom ntseeg tau tias feem ntau ntawm lub hnub ci zog siv tau zoo. Fais fab tso zis: Hnub ci inverters muaj nyob rau hauv ntau yam kev ntsuas hluav taws xob, xws li los ntawm cov tsev nyob me me mus rau kev lag luam loj. Lub zog tso zis ntawm lub inverter yuav tsum tau ua kom haum nrog lub peev xwm ntawm lub hnub ci vaj huam sib luag kom ua tiav qhov kev ua tau zoo. Durability thiab Reliability: Hnub ci inverters raug cuam tshuam rau ib puag ncig sib txawv, suav nrog kev hloov pauv kub, av noo, thiab hluav taws xob muaj zog. Yog li ntawd, inverters yuav tsum tau tsim nrog cov ntaub ntawv muaj zog thiab tsim los tiv thaiv cov xwm txheej no, ua kom muaj kev ntseeg tau ntev. Kev soj ntsuam thiab kev sib txuas lus: Ntau lub hnub ci inverters niaj hnub tuaj nruab nrog cov kev saib xyuas uas tso cai rau cov neeg siv taug qab kev ua haujlwm ntawm lawv lub hnub ci PV system. Qee qhov inverters tuaj yeem sib txuas lus nrog cov khoom siv sab nraud thiab software platforms, muab cov ntaub ntawv ntawm lub sijhawm tiag tiag thiab ua rau kev saib xyuas thiab tswj cov chaw taws teeb. Kev nyab xeeb nta: Hnub ci inverters suav nrog ntau yam kev nyab xeeb los tiv thaiv ob lub cev thiab cov neeg ua haujlwm nrog nws. Cov yam ntxwv no muaj xws li kev tiv thaiv overvoltage, kev tiv thaiv overcurrent, kev ua txhaum hauv av, thiab kev tiv thaiv kev tiv thaiv, uas tiv thaiv lub inverter los ntawm kev pub fais fab rau hauv kab hluav taws xob thaum lub zog hluav taws xob. Solar Inverter Classification los ntawm Kev Ntsuas Hluav Taws Xob PV inverters, tseem hu ua hnub ci inverters, tuaj yeem muab faib ua ntau hom raws li lawv tsim, ua haujlwm, thiab daim ntawv thov. Nkag siab txog cov kev faib tawm no tuaj yeem pab xaiv qhov tsim nyog tshaj plaws inverter rau lub hnub ci PV tshwj xeeb. Cov hauv qab no yog cov hom tseem ceeb ntawm PV inverters cais los ntawm qib zog: Inverter raws li theem fais fab: feem ntau muab faib ua inverter faib (txoj hlua inverter & micro inverter), centralized inverter Txoj hlua Inverters: String inverters yog hom PV inverters feem ntau siv nyob rau hauv vaj tse thiab kev lag luam hnub ci kev teeb tsa, lawv tau tsim los tswj ntau lub hnub ci vaj huam sib luag txuas nrog hauv series, tsim "txoj hlua." PV hlua (1-5kw) tau dhau los ua cov inverter nrov tshaj plaws hauv kev lag luam thoob ntiaj teb niaj hnub no los ntawm inverter nrog lub zog siab tshaj plaws taug qab ntawm DC sab thiab cov kab sib txuas sib txuas ntawm AC sab. DC hluav taws xob tsim los ntawm lub hnub ci vaj huam sib luag yog pub rau hauv txoj hlua inverter, uas hloov nws mus rau hauv AC hluav taws xob rau kev siv tam sim lossis rau kev xa tawm mus rau daim phiaj. Cov hlua inverters paub txog lawv txoj kev yooj yim, kev ua tau zoo, thiab kev yooj yim ntawm kev teeb tsa. Txawm li cas los xij, kev ua haujlwm ntawm tag nrho cov hlua yog nyob ntawm qhov ua haujlwm qis tshaj plaws, uas tuaj yeem cuam tshuam rau tag nrho cov kev ua haujlwm zoo. Micro inverter: Micro inverters yog me me inverters uas tau nruab rau ntawm txhua tus neeg lub hnub ci vaj huam sib luag hauv PV system. Tsis zoo li cov hlua inverters, micro inverters hloov DC hluav taws xob rau AC txoj cai ntawm lub vaj huam sib luag. Qhov kev tsim no tso cai rau txhua lub vaj huam sib luag ua haujlwm ntawm nws tus kheej, ua kom lub zog tag nrho cov khoom tsim tawm. Micro inverters muaj ntau qhov zoo, suav nrog lub vaj huam sib luag-theem siab tshaj plaws lub zog taw tes nrhiav (MPPT), txhim kho kev ua haujlwm hauv cov duab ntxoov ntxoo lossis tsis sib haum, muaj kev nyab xeeb ntau ntxiv vim qis DC voltages, thiab kev saib xyuas cov ntsiab lus ntawm cov vaj huam sib luag kev ua tau zoo. Txawm li cas los xij, tus nqi siab dua thiab qhov nyuaj ntawm kev teeb tsa yog qhov yuav tsum tau xav txog. Centralized Inverters: Centralized inverters, tseem hu ua loj los yog nqi hluav taws xob (> 10kW) inverters, feem ntau yog siv nyob rau hauv loj-scale hnub ci PV installations, xws li hnub ci teb los yog lag luam hnub ci tej yaam num. Cov inverters no tau tsim los tswj cov khoom siv hluav taws xob siab DC los ntawm ntau cov hlua lossis cov arrays ntawm lub hnub ci vaj huam sib luag thiab hloov mus rau hauv AC fais fab kev sib txuas. Qhov loj tshaj plaws yog lub zog siab thiab tus nqi qis ntawm lub kaw lus, tab sis txij li qhov tso zis hluav taws xob thiab tam sim no ntawm cov hlua PV sib txawv feem ntau tsis sib haum (tshwj xeeb tshaj yog thaum cov hlua PV yog ib nrab ntxoov ntxoo vim cloudiness, ntxoov ntxoo, stains, thiab lwm yam). , kev siv centralized inverter yuav ua rau txo qis ntawm cov txheej txheem inverting thiab qis zog hluav taws xob hauv tsev. Centralized inverters feem ntau muaj lub zog muaj peev xwm ntau dua piv rau lwm hom, xws li los ntawm ob peb kilowatts mus rau ob peb megawatts. Lawv tau nruab rau hauv qhov chaw nruab nrab lossis qhov chaw nres tsheb inverter, thiab ntau txoj hlua lossis arrays ntawm lub hnub ci vaj huam sib luag txuas nrog lawv nyob rau tib lub sijhawm. Lub hnub ci Inverter ua dab tsi? Photovoltaic inverters pab ntau lub zog, suav nrog AC hloov dua siab tshiab, ua kom lub hnub ci ua haujlwm zoo, thiab kev tiv thaiv kab ke. Cov haujlwm no suav nrog kev ua haujlwm tsis siv neeg thiab kaw, kev tswj xyuas lub zog siab tshaj plaws, kev tiv thaiv cov Islands tuaj (rau kab sib txuas sib txuas), kev hloov hluav taws xob tsis siv neeg (rau kab sib txuas sib txuas), DC nrhiav pom (rau kab sib txuas sib txuas), thiab DC hauv av nrhiav pom ( rau daim phiaj-txuas systems). Cia peb luv luv tshawb txog qhov kev ua haujlwm tsis siv neeg thiab kev kaw haujlwm thiab qhov siab tshaj plaws lub zog taug qab tswj kev ua haujlwm. 1) Tsis siv neeg ua haujlwm thiab kaw haujlwm Tom qab hnub sawv ntxov, qhov kev siv ntawm lub hnub ci hluav taws xob nce zuj zus, thiab cov khoom tsim tawm ntawm lub hnub ci zog nce ntxiv. Thaum cov zis hluav taws xob xav tau los ntawm inverter mus txog, lub inverter pib khiav tau. Tom qab nkag mus rau hauv lub lag luam, lub inverter yuav saib xyuas cov zis ntawm lub hnub ci cell Cheebtsam txhua lub sijhawm, tsuav yog tias cov khoom siv hluav taws xob ntawm lub hnub ci hluav taws xob ntau dua li qhov tso zis hluav taws xob xav tau los ntawm inverter, lub inverter yuav khiav mus ntxiv; kom txog thaum hnub poob nres, txawm tias los nag Lub inverter kuj ua haujlwm. Thaum cov zis ntawm lub hnub ci cell module ua me me thiab cov zis ntawm lub inverter yog ze rau 0, lub inverter yuav tsim ib lub xeev standby. 2) Kev tswj xyuas lub zog siab tshaj plaws Cov zis ntawm lub hnub ci cell module txawv nrog qhov siv ntawm lub hnub ci hluav taws xob thiab qhov kub ntawm lub hnub ci cell module nws tus kheej (chip kub). Tsis tas li ntawd, vim hais tias lub hnub ci cell module muaj cov yam ntxwv uas qhov voltage txo nrog qhov nce ntawm qhov tam sim no, yog li muaj qhov ua haujlwm zoo tshaj plaws uas tuaj yeem tau txais lub zog siab tshaj plaws. Kev siv hluav taws xob hnub ci hloov pauv, pom tseeb tias qhov ua haujlwm zoo tshaj plaws kuj tseem hloov pauv. txheeb ze rau cov kev hloov pauv no, qhov chaw ua haujlwm ntawm lub hnub ci cell module yog ib txwm nyob ntawm qhov siab tshaj plaws lub zog taw tes, thiab lub kaw lus ib txwm tau txais lub zog siab tshaj plaws los ntawm lub hnub ci cell module. Hom kev tswj no yog lub siab tshaj plaws lub zog taug qab tswj. Qhov loj tshaj feature ntawm lub inverter siv nyob rau hauv lub hnub ci zog tiam system yog lub functionality ntawm lub siab tshaj plaws zog taw tes mus txog qhovtwg (MPPT). Lub ntsiab Technical Indicators ntawm Photovoltaic Inverter 1. Kev ruaj ntseg ntawm cov zis voltage Nyob rau hauv lub photovoltaic system, lub zog hluav taws xob tsim los ntawm lub hnub ci cell yog thawj zaug khaws cia los ntawm lub roj teeb, thiab tom qab ntawd hloov mus rau hauv 220V lossis 380V alternating tam sim no los ntawm inverter. Txawm li cas los xij, lub roj teeb raug cuam tshuam los ntawm nws tus kheej them thiab tawm, thiab nws cov zis voltage sib txawv hauv ntau yam. Piv txwv li, lub nominal 12V roj teeb muaj tus nqi hluav taws xob uas muaj peev xwm sib txawv ntawm 10.8 thiab 14.4V (tshaj qhov no yuav ua rau lub roj teeb puas). Rau ib tug tsim nyog inverter, thaum lub input davhlau ya nyob twg voltage hloov nyob rau hauv no ntau yam, qhov variation ntawm nws ruaj khov-lub xeev tso zis voltage yuav tsum tsis txhob ntau tshaj Plusmn; 5% ntawm tus nqi ntsuas. Nyob rau tib lub sijhawm, thaum lub load hloov dheev, nws cov zis voltage sib txawv yuav tsum tsis pub tshaj ± 10% tshaj tus nqi ntsuas. 2. Waveform distortion ntawm cov zis voltage Rau sine yoj inverters, qhov siab tshaj plaws tso cai waveform distortion (los yog cov ntsiab lus sib haum xeeb) yuav tsum tau teev tseg. Nws yog feem ntau qhia los ntawm tag nrho cov waveform distortion ntawm cov zis voltage, thiab nws cov nqi yuav tsum tsis txhob ntau tshaj 5% (10% tso cai rau ib-theem tso zis). Txij li thaum qhov kev txiav txim siab sib haum xeeb tam sim no los ntawm lub inverter yuav ua rau muaj kev puas tsuaj ntxiv xws li eddy tam sim no ntawm lub inductive load, yog tias lub waveform distortion ntawm lub inverter loj heev, nws yuav ua rau muaj cua sov loj ntawm cov khoom thauj khoom, uas tsis tsim nyog. kev nyab xeeb ntawm cov khoom siv hluav taws xob thiab cuam tshuam rau lub cev. kev khiav hauj lwm efficiency. 3. Rated tso zis zaus Rau cov khoom thauj xws li lub cev muaj zog, xws li tshuab ntxhua khaub ncaws, tub yees, thiab lwm yam, vim tias qhov kev ua haujlwm zoo tshaj plaws ntawm lub cev muaj zog yog 50Hz, siab dhau lossis qis dhau yuav ua rau cov cuab yeej ua kom sov, txo qhov kev ua haujlwm ntawm kev ua haujlwm thiab kev pabcuam lub neej, yog li lub inverter qhov tso zis zaus yuav tsum yog tus nqi ruaj khov, feem ntau lub zog zaus 50Hz, thiab nws qhov sib txawv yuav tsum tsis pub dhau Plusmn; l% raws li kev ua haujlwm ib txwm muaj tej yam kev mob. 4. Thauj khoom fais fab Qhia lub peev xwm ntawm lub inverter nrog inductive load lossis capacitive load. Lub zog thauj khoom ntawm sine yoj inverter yog 0.7 ~ 0.9, thiab tus nqi ntsuas yog 0.9. Nyob rau hauv cov ntaub ntawv ntawm ib tug tej yam load hwj chim, yog hais tias lub hwj chim ntawm lub inverter yog tsawg, lub peev xwm ntawm qhov yuav tsum tau inverter yuav nce. Ntawm qhov tod tes, tus nqi yuav nce ntxiv, thiab tib lub sijhawm, lub zog pom tseeb ntawm AC Circuit Court ntawm photovoltaic system yuav nce. Raws li qhov tam sim no nce, qhov poob yuav inevitably nce, thiab qhov system efficiency kuj yuav txo. 5. Inverter efficiency Qhov ua tau zoo ntawm lub inverter yog hais txog qhov sib piv ntawm nws cov zis hluav taws xob rau lub zog input nyob rau hauv cov kev ua haujlwm tau teev tseg, qhia raws li feem pua. Nyob rau hauv dav dav, lub nominal efficiency ntawm ib tug photovoltaic inverter yog hais txog ib tug ntshiab kuj load. Nyob rau hauv cov xwm txheej ntawm 80% load s efficiency. Txij li tag nrho cov nqi ntawm photovoltaic system yog siab, qhov ua tau zoo ntawm photovoltaic inverter yuav tsum ua kom tiav kom txo tau cov nqi hluav taws xob thiab txhim kho cov nqi kev ua haujlwm ntawm photovoltaic system. Tam sim no, qhov nominal efficiency ntawm mainstream inverters yog nyob nruab nrab ntawm 80% thiab 95%, thiab cov efficiency ntawm low-power inverters yuav tsum tsis pub tsawg tshaj li 85%. Nyob rau hauv tus txheej txheem tsim qauv ntawm lub photovoltaic system, tsis tsuas yog yuav tsum tau xaiv ib tug high-efficiency inverter, tab sis kuj yog ib tug tsim nyog configuration ntawm lub system yuav tsum tau siv los ua kom lub load ntawm lub photovoltaic system ua hauj lwm nyob ze ntawm qhov zoo tshaj plaws efficiency point ntau npaum li cas. . 6. Rated tso zis tam sim no (los yog ntsuas cov zis muaj peev xwm) Qhia qhov ntsuas qhov tso zis tam sim no ntawm lub inverter nyob rau hauv qhov teev cov khoom siv fais fab. Qee cov khoom lag luam inverter muab lub peev xwm tso zis, thiab nws chav nyob tau qhia hauv VA lossis kVA. Lub peev xwm ntsuas ntawm lub inverter yog cov khoom ntawm qhov ntsuas qhov tso zis hluav taws xob thiab cov khoom tso tawm tam sim no thaum cov zis hluav taws xob yog 1 (uas yog, qhov hnyav hnyav hnyav). 7. Kev tiv thaiv kev ntsuas Lub inverter nrog kev ua tau zoo heev yuav tsum muaj kev tiv thaiv ua tiav lossis kev ntsuas los cuam tshuam nrog ntau yam txawv txav uas tshwm sim thaum siv tiag tiag, txhawm rau tiv thaiv lub inverter nws tus kheej thiab lwm yam khoom ntawm lub cev los ntawm kev puas tsuaj. 1) Nkag mus rau undervoltage insurance account: Thaum lub input davhlau ya nyob twg voltage qis dua 85% ntawm qhov ntsuas voltage, lub inverter yuav tsum muaj kev tiv thaiv thiab tso saib. 2) Input overvoltage tiv thaiv: Thaum lub input davhlau ya nyob twg voltage siab tshaj 130% ntawm qhov ntsuas voltage, lub inverter yuav tsum muaj kev tiv thaiv thiab tso saib. 3) Kev tiv thaiv overcurrent: Kev tiv thaiv overcurrent ntawm lub inverter yuav tsum muaj peev xwm xyuas kom meej lub sijhawm ua haujlwm thaum lub sijhawm thauj khoom luv luv lossis tam sim no tshaj li qhov tso cai, txhawm rau tiv thaiv nws los ntawm kev puas tsuaj los ntawm qhov hluav taws xob tam sim no. Thaum ua hauj lwm tam sim no tshaj 150% ntawm tus nqi ntsuas, lub inverter yuav tsum tau txais kev tiv thaiv. 4) tso zis luv Circuit Court tiv thaiv Lub sijhawm tiv thaiv luv luv ntawm lub inverter yuav tsum tsis pub tshaj 0.5s. 5) Input rov qab polarity tiv thaiv: Thaum qhov zoo thiab qhov tsis zoo ntawm cov khoom siv hluav taws xob tau thim rov qab, lub inverter yuav tsum muaj kev tiv thaiv thiab tso saib. 6) Kev tiv thaiv xob laim: Lub inverter yuav tsum muaj kev tiv thaiv xob laim. 7) Kev tiv thaiv kub dhau, thiab lwm yam. Tsis tas li ntawd, rau inverters tsis muaj qhov ntsuas qhov ntsuas hluav taws xob, lub inverter yuav tsum muaj cov khoom siv hluav taws xob tiv thaiv kev tiv thaiv los tiv thaiv lub nra ntawm overvoltage puas. 8. Pib yam ntxwv Txhawm rau ua kom muaj peev xwm ntawm inverter pib nrog kev thauj khoom thiab kev ua haujlwm thaum lub sijhawm ua haujlwm dynamic. Lub inverter yuav tsum xyuas kom ntseeg tau pib nyob rau hauv rated load. 9. Suab nrov Cheebtsam xws li transformers, lim inductors, electromagnetic keyboards thiab kiv cua hauv cov khoom siv hluav taws xob hluav taws xob yuav tsim suab nrov. Thaum lub inverter ua haujlwm ib txwm, nws lub suab nrov yuav tsum tsis pub tshaj 80dB, thiab lub suab nrov ntawm lub inverter me me yuav tsum tsis pub tshaj 65dB. Xaiv Kev Txawj Ntse ntawm Hnub Ci Inverters
Post lub sij hawm: May-08-2024