Dab tsi yog qhov cuam tshuam ntawm diode kev rhuav tshem ntawm inverter?

一, hom thiab lub cev ua ke ntawm Diode rhuav tshem
Diode rhuav tshem tuaj yeem faib ua ob hom: Hluav taws xob tawg thiab thermal tuaj yeem cuam tshuam nrog cov khoom siv, doping concentration, kub, thiab lwm yam.

1. Hluav Taws Xob Hluav Taws Xob: Cov Txheej Txheem Reversible
Lub zog hluav taws xob sib tawg no suav nrog ob lub tshuab: Zenergent thiab avalanche tawg

Zenerter puas: tshwm sim nyob rau hauv dopetly pn junctionsers (xws li voltage regulators), qhov twg depletion txheej dav yog qhov nqaim heev (<1 μ m). Under the action of reverse voltage, a strong electric field directly pulls out the valence electrons in covalent bonds, forming electron hole pairs, resulting in a sharp increase in reverse current. Zener breakdown voltage is usually below 4V and has a negative temperature coefficient (breakdown voltage decreases with increasing temperature).
Avalanche breakdown: commonly seen in low doped PN junctions, with a wide depletion layer (>10 μ m). Rov qab voltage accelitates cov neeg tsawg, ua rau lawv sib tsoo nrog lub lattice thiab tsim cov khoom tshiab avalanche. Lub avalanche tawg voltage feem ntau yog siab tshaj 6v thiab muaj qhov ntsuas kub zoo tshaj li 6v thiab muaj qhov sib txig sib luag tau (qhov tawg voltage nce nrog kub).
Hluav taws xob hluav taws xob yog qhov tseem ceeb rov qab cov txheej txheem ntawm lub cev.

2. Thermal tawg: ireversible kev puas tsuaj tsis ua hauj lwm
Thaum lub thaub qab no txuas ntxiv nce ntxiv qhov hluav taws xob tawg, lossis thaum infinite kev ntsuas tam sim no yog nyob rau hauv Circuit Court tam sim no ntau tshaj qhov kev txwv tus nqi, ua rau muaj kev sib tw kub. Txij ntawm no, lub peev hluav taws xob hauv lub rooj sib txuas ua ke tau txais lub zog dawb los ntawm cov khoom siv hluav taws xob pub dawb thiab tsim kev sib tw tam sim no thiab sib sau cov lus pom kev zoo tam sim no. Nws thiaj li, lub pob qij taws me me vim tias overheating, sib sau ua ib lub zog luv luv, hu ua thermal tawg. Thermal tawg yog irreversible, thiab cov diode yuav tag nrho poob nws txoj haujlwm.

2, kev raug mob ncaj qha ntawm Diode rhuav tshem rau inverers
Diodes hauv Inverters yog tsuas yog siv rau rectification, freewheeling, thiab lawv puas tuaj yeem ua rau muaj kev sib cav sib txig sib txawv.

1. Kho Diode rhuav tshem: Lub zog luv luv hluav taws xob thiab capacitor tawg
Hauv photovoltaic inverers lossis muaj kev muaj zog choj muaj 6 dodes Yog tias ib daim di diode yog thermally tawg rau hauv Circuitaly, nws yuav ua rau muaj qhov zoo thiab tsis zoo ntawm DC npav los ua tus coj ncaj qha, ua rau lub zog muaj hwj chim. Txij ntawm no, cov lim dej capacitor sai sai txog vim muaj ntau tshaj, ua rau electrolyte kom volforize thiab nthuav dav, uas yuav ua rau kev tawg. Piv txwv li, hauv qee qhov chaw nres tsheb fais fab hluav taws xob, kev sib tawg ntawm lub ntsuas hluav taws xob ua rau muaj cov tshuaj ntsuam DC nkaus xwb thiab kev lag luam poob ncaj ntawm 100000.
2. Clamp Diode tsoo: Tsheb npav Voltage tawm ntawm kev tswj hwm
Nyob rau hauv multi - breake inverters, clampes yog siv los txwv DC npav lub tsheb npav voltage hloov. Yog tias lub pob zeb clamping tawg, lub tsheb loj tshaj lub tsheb loj tshaj lub igbt withstand ntau, ua rau cov saw tawg. Piv txwv li, ntsuas nruab nrab hluav taws xob muab cov converter kev sib tawg ntawm lub sijhawm ntawm lub sijhawm 600v rau 900V rau 900V, ua rau muaj kev puas tsuaj rau txhua lub 12 igBT rau lub sijhawm txog li 72 teev.

3, Txheej Txheem Qib Teeb Meem ntawm Diode rhuav tshem
1. Kev cuam tshuam hluav taws xob hauv hluav taws xob (EMI) thiab teeb liab distortion
Thaum ib qho kev hloov pauv tawg, kev hloov pauv sai sai hauv Circuit Court tam sim no yuav tsim kev txhawb nqa hluav taws xob nrog kev txhawb nqa hluav taws xob thiab ua rau muaj kev cuam tshuam nrog lub teeb meem aigbt drive. Nyob rau hauv cov cua fais fab converter rooj plaub, EMI cuam tshuam tshwm sim los ntawm qhov kev puas tsuaj los ntawm lub zog aws ntawm lub cev muaj zog los hloov pauv ntawm kev co tshuab kev co tswb.
2. Kev tiv thaiv Circuit Court Kev Tsis Txaus Siab thiab Kev tuag tes tuag taw
Niaj hnub niaj hnub inverters feem ntau yog nruab nrog overcurrent, overvoltage, thiab tshaj qhov kev tiv thaiv kub. Txawm li cas los xij, Diode tsoo tej zaum yuav ua rau kev thuam ntawm Circuit Court:
Kev tiv thaiv dhau los: Circuit Court tam sim no tuaj yeem ua yuam kev rau kev hloov pauv tam sim no thiab ua haujlwm rau kev ua haujlwm tam sim no;
Kev tiv thaiv tsis ua tiav: yog lub pob zeb clamp, kev saib xyuas tsheb volting, thiab kev tiv thaiv kev tiv thaiv tsis tuaj yeem ua haujlwm;
Kev Tiv Thaiv Kev Tiv Thaiv Kev Tiv Thaiv Kev Tiv Thaiv Kev Ua Si: Qhov kub ntawm Diode rhuav tshem qhov kub thiab txias ntawm kev tiv thaiv kev tiv thaiv kev ntxhov siab.
Nyob rau hauv ib kis ntawm traction inverter nyob rau hauv ib yam kev hloov tsheb ciav hlau, kev kub siab ntawm Rectifier Diode ua rau muaj kev tiv thaiv kev ua haujlwm dhau, ua rau muaj kev ua haujlwm ntau zaus ntawm cov kab ke. Nws thiaj li, vim kev sib tw ua si, lub igBt module tawg thiab lub tsheb ciav hlau nres rau 12 teev.
4, lub tswv yim tiv thaiv thiab ntseeg tau tsim qauv
1. Circuit Tsim Qauv: Rov ua dua tshiab thiab kev txwv tam sim no
Kev tsim qauv tsim qauv: Hauv tus choj Rectifier, ib qho "n {+1" sedundant configuration yog saws me nyuam, uas txhais tau tias cov dongs ntxiv tau txuas nrog kev sib txuas. Thaum ib qho teeb meem ib leeg tawg, lub kaw lus tseem tuaj yeem ua haujlwm ntawm kev txo qis;
Tam sim no lim cov resistor: txuas me me tiv taus cov peev xwm (xws li 0.1 ω / 5W) nyob rau hauv series rau kev txwv lub ncov luv luv- Circuit System Tam sim no;
Rc Buffer Circuit Circuit Court: Ntxiv rau RC tsis muaj Circuit Court (xws li c {}} {{{{1} μ {)
2. System Xyuas: Tiag -} lub sij hawm kuaj mob thiab kev txij nkawm
Kev Ntsuas Hluav Taws Xob Infrared Nrhiav kom tau: Lub sijhawm tiag Saib xyuas Diode lub ntsej muag kub los ntawm qhov kub tshaj tus nqi tshaj li 15 degree;
Hluav Taws Xob Cov Hluav Taws Xob Kev Saib Xyuas: Lub sijhawm saib xyuas hluav taws xob tiag tiag ntawm Diode tam sim no los ntawm tam sim no sensors), thiab kev tiv thaiv yog ua kom ntau tshaj 1.2 npaug ntawm tus nqi ntsuas;
Ai Txhaum Kev Ua Ntej: Tsheb ciav hlau cov qauv kawm raws li cov ntaub ntawv keeb kwm ntxiv (kav cov ntawv sau tseg thiab hloov siab} txoj kev pheej hmoo ua ntej.