Dab tsi kub dissipation teeb meem yuav tsum raug txiav txim siab thaum siv dodeses hauv inverters?

一, tsim kho kom tau ntawm cov kev sib tsoo

1. PCB thermal tsim kho kom zoo
Tooj liab Factansion: nce lub anode / cathode tooj liab ntawv nyiaj (xws li kev txhim kho los ntawm 1oz) tuaj yeem txo cov thermal kuj los ntawm 30%. Piv txwv li, los ntawm kev npaj tshav kub dissipation vias (hla 0.5 hli, tshav kub tuaj yeem mus rau hauv qab pcb, txhim kho tshav kub dissipation los ntawm 25%.
Kev rho tawm cov txheej txheem: kom tsis txhob thermal txuas ntawm lub zog hluav taws xob dodes thiab tswj cov circuen Vim tias tsis txaus sab ntawm mosfets thiab diodes nyob rau hauv ib lub tsheb inverter, ntsuas kub ntawm kev tswj hwm ua rau tus qauv, ua rau kev tiv thaiv tsis tseeb.
2. Xaiv los ntawm tshav kub dissipation txoj kev
Cua Cua Txias Kub Txhob: Haum rau cov xwm txheej nrog lub zog ntom ntom<5W/cm ³, requiring control of airflow velocity ≥ 2m/s. For example, a 10kW household energy storage inverter uses an axial fan to control the diode junction temperature within 110 ℃.
Kua cua txias cua sov disspation: Thaum lub zog hluav taws xob tau loj dua 10w / cm ³, kua cua txias txias tuaj yeem txo qhov kub ntawm 40 degree. Tom qab kev npaj ua kua txias hloov kho, lub neej muaj kev lom zem nyob rau hauv ib lub chaw ua haujlwm tau txuas los ntawm 8 xyoo.
Theem Hloov Khoom (PCM): Hauv qhov chaw kaw, PCM tuaj yeem nqus tau tam sim no thermal poob siab. Cov kev sim tau pom tias PCPedding PC nyob rau hauv 5kW Inverter txo cov amplitude ntawm diode hloov pauv ntawm diode hloov pauv ntawm 60%.
2, kev ntsuas qhov tseem ceeb hauv kev ua engineering
1. Ntaus Ntaus Ntawv Xaiv
Volgage thiab cov paj laum tam sim no: Cov ntsuas hluav taws xob ntawm daim diode yuav tsum muaj ntau dua los yog sib npaug ntawm cov kab ke hluav taws xob voltage, thiab cov rated tam sim no yuav tsum loj dua los yog sib npaug ntawm 2 zaug tam sim no. Piv txwv li, hauv 1000V photovoltaic, ib 1200v voltage resistant Diode xav tau xaiv.
Tsawg VF thiab cov yam ntxwv tsawg IRISCATION: Cov khoom siv nrog VF<0.5V (Schottky diodes) or VF<1.5V (SiC diodes) are preferred. After using STPS30H100 Schottky diode (VF=0.4V) in a certain micro inverter, the efficiency was improved by 1.2%.
2. Kev ntsuas kub tiag tiag
NTC thermistor: Embedded nrog NTC Hauv Chav Diode Pob, nws tuaj yeem saib xyuas kev sib tshuam kub hauv lub sijhawm tiag tiag. Ib co photovoltaic inverter dynamically hloov kho zaus los ntawm NTC tswv yim kub ntawm Diode junction kub ntawm ± 15℃mus ± 5 degree.
Qhov ntsuas cua sov infrared: kev kuaj pom tsis tu ncua tau siv los txheeb xyuas hotspots hauv zos. Thaum lub sijhawm tu ntawm cov cua ntsawj zog, nws tau pom tias Dirod solder ntaub ntawv yog virtual, ua rau muaj qhov kub nyob hauv zos nce mus txog 80 degree. Tom qab kho, lub system efficiency tau rov qab los rau 98.5%.
3. Txo cov kev siv hluav taws xob
Kho cov zis siv hluav taws xob raws li qhov kub thiab txias:

40 Degree ib puag ncig: Siv nrog rau 5% txo qis kev ntsuas;
60℃ib puag ncig: siv nrog 20% ​​txo qhov ntsuas ntsuas.
Chaw nres nkoj suab puam photovoltaic siv hluav taws xob ua kom zoo nkauj, txo tus nqi ua tsis tiav ntawm 0.8% / xyoo rau 0.2% / xyoo.