Yuav ua li cas diodes thiab Mosfets / iGBts ua haujlwm ua ke hauv inverters?

1, kev ua haujlwm tsis zoo nyob rau hauv Topology architecture
(1) Minimalist Kev Koom Tes Sib Koom Tes ntawm Ib Nrab Choj Inverter
Ib nrab Choj Inverter Adopts tus qauv pauv dual Diode, thiab DC sab ua ob sab uas capacitor voltagent. Thaum tus choj sab saud moses (Q1) tau muab tua, txoj kev tam sim no yog VDC / 2, thiab lub nroog loj Thaum Q1 tau muab tua, rov qab electromotive electructance cov ntaub ntawv inductance cov ntaub ntawv tsis pub dawb los ntawm D2: Thauj → D2 → VDC / 2. Tus txheej txheem no ua tiav ob lub luag haujlwm tseem ceeb:

Voltage clampage: txwv lub voltage uas Mosfet tuaj yeem tiv taus VDC / 2 kom tsis txhob muaj kev rhuav tshem;
Zog cov lus qhia: Muab cov channel tso tawm rau kev cia hluav taws xob cia kom tiv thaiv cov kab hluav taws xob voltage los ntawm kev hloov pauv tam sim no.
Kev sim cov ntaub ntawv qhia tau hais tias hauv 1kw ib nrab choj Inverter system, lub ncov freewheeling tam sim no ntawm D2 tuaj yeem ncav tes ua kom ntseeg tau tias hloov kev ua tau zoo. Kev siv cov kev rov ua kom nrawm

(2) redundant koom tes ua vaj tse ntawm tag nrho choj Inverter
Tag nrho tus choj Inverter Adopts Adopts Admacts, uas ua tiav cov zis voltage polarity thim rov qab los ntawm kev hloov pauv ntawm ob khub ntawm cov keyboards. Nws qhov txawv txav yog xav txog hauv:

Bipololle Tswj: los ntawm kev sib xyaw ntawm T1-T4 kev tab, ua tiav voltage viav vias ntawm ± VDC tuaj yeem tau txais ntawm lub nra ntev. DONSIOES D1-D4 tsis yog ua tiav cov kev ua haujlwm dawb, tab sis kuj ua ib lub zog xav tau channel;
Ua txhaum Kev Tiv Thaiv: Thaum T1 thiab T4 yog ob qho tib si misguided, d2- d3 tuaj yeem tsim txoj kev tiv thaiv hluav taws xob luv luv los tiv thaiv DC npav Luv Npav.
Kev sim sib piv tau hais tias lub ncov yuav rov qab voltage borne los ntawm diodes nyob rau hauv ib nrab choj cov qauv, tab sis ntau dua cov khoom siv tam sim no) yuav tsum tau daws. Hauv ib peb {-}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}} Thaum cov tam sim no ntawm qee theem ua, lub donges ntawm tus xov tooj txawb tuaj yeem coj cov hluav taws xob ntau dhau mus rau lwm ntu kev faib khoom.

2, lub zog tswj kev tswj tshuab hauv kev teb dynamic
(1) Kev tiv thaiv tam sim no ntawm Mosfet lub cev Diode
Lub cev diode eargational sab hauv Mosfet ua si lub luag haujlwm tseem ceeb hauv inverters. Thaum lub zog hluav taws xob txuas nrog lub zog Mosfet, lub zog hluav taws xob tau muab khaws cia rau hauv lub nra ntawm lub sijhawm ntawm lub cev tso rau hauv lub cev. Noj txhuam hniav DC tsav tsav ua piv txwv:

Cov zog siab hloov pauv: thaum lub siab siab- zaus hloov ntawm Mosfet txoj kev rau lub inductor tam sim no thaum lub sijhawm Q1;
Cov Ntsej Muag Tam Sim No: Inductance L1 Cov Khoom Taw Qhia Siab rau lub qhov hluav taws kub tam sim no, ua rau muaj cov spikes ntxiv thaum q1 kev coj ua. Los ntawm kev siv Mosfets nrog ceev lub cev DIOde rov qab cov yam ntxwv (xws li St's superfredmesh series tuaj yeem txo tau los ntawm 60℃mus rau 50 degree.
(2) Lub zog tawm tswv yim ntawm igbt anti parallel diode
Raws li cov khoom siv tseem ceeb hauv high - voltage thiab siab trectarios Hauv kev rov ua dua tshiab Inverter:

Kev tswj hwm lub sijhawm tuag: thaum lub sijhawm igb nyob rau sab saud thiab sab hauv caj dab
Resonant lub zog nqus dej nqus: thaum lub zog kaw, lub zog khaws cia rau hauv cov kab kev sib tshuam ntawm kev tawm tsam ntawm kev tawm tsam ntawm VD1 kom tiv thaiv tau overshoot.
Kev sim tau pom tias siv siab -}}} Ua haujlwm nrawm nrawm dua 40% thiab txhim kho kev txuag nyiaj 98.2%.

3, parameter txuam yuav tsum muaj nyob rau hauv cov tswv yim tswjhwm
(1) Kev tswj yooj yim yooj yim ntawm ib nrab choj Inverter
Ib nrab choj tus qauv feem ntau tau txais kev tswj bipolar lossis unipolar spev tswj, thiab cov cai rau diodes tau tsom rau cov cwj pwm zoo li qub:

Rov qab lub sijhawm rov qab: Trr tsawg dua lossis sib npaug nrog 50ns (haum rau high- zaus hloov);
Junction Captance: CJ Tsawg dua lossis sib npaug rau 100PF (txo cov suab nrov hloov).
Raws li cov ntaub ntawv xaiv ntawm qee lub tsheb inverter project, xws li mur 860) los ntawm 8db thiab luv luv lub sijhawm ntawm 500ns rau 200ns.

(2) cov kev hloov kho ntawm tag nrho Choj Inverter
Tus qauv uas tag nrho txhawb nqa kev hloov kho cov thev naus laus zis xws li zaus ua ob npaug rau cov spev, uas imposes siab dua cov kev xav tau dua dynamic

Qhov kub thiab txias: Hauv thaj tsam ntawm ntau -40 Degree ~ 150℃poob hloov pauv tus nqi yuav tsum tsawg dua los yog sib npaug nrog 5mv / degree;
Anti avalanche muaj peev xwm: nws yuav tsum tau tiv thaiv avalanche lub zog tsawg kawg 1.5 zaug cov rated tam sim no.
Ib qho kev muaj lub cev muaj zog tsav rooj plaub tau pom tias siv Silicon Carbide Diodes (xws li C3D10060E) tuaj yeem txo cov khoom siv hluav taws xob los ntawm 40% thiab nce lub hwj chim ceev rau 3.2kW / l. Nws cov ntsiab lus zoo nyob rau hauv:

Rov qab rov qab los ntawm kev them QRR txo qis los ntawm 70%;
Qhov kev ruaj ntseg ntawm kev ua kom haum siab yog nce los ntawm peb zaug hauv qhov chaw kub ib puag ncig.