Narrow Pulse Phenomenon yog dab tsi
Raws li hom kev hloov hluav taws xob, IGBT xav tau qee lub sijhawm cov tshuaj tiv thaiv los ntawm lub rooj vag theem teeb liab mus rau cov txheej txheem hloov khoom siv, ib yam li nws yooj yim rau nyem tes nrawm hauv lub neej hloov lub rooj vag, luv luv qhib mem tes yuav ua rau siab dhau. voltage spikes los yog cov teeb meem ntau zaus oscillation.Qhov tshwm sim no tshwm sim tsis muaj kev cuam tshuam los ntawm qee lub sijhawm raws li IGBT tau tsav los ntawm lub zog siab PWM hloov pauv cov cim.Lub voj voog me me, qhov yooj yim dua yog qhov tso zis nqaim pulses, thiab rov qab cov yam ntxwv ntawm IGBT anti-parallel renewal diode FWD ua sai dua thaum lub sij hawm hloov dua tshiab.Rau 1700V / 1000A IGBT4 E4, qhov tshwj xeeb hauv qhov sib txuas kub Tvj.op = 150 ℃, lub sijhawm hloov pauv tdon = 0.6us, tr = 0.12us thiab tdoff = 1.3us, tf = 0.59us, nqaim mem tes dav tsis tuaj yeem tsawg dua tshaj qhov sum ntawm specification hloov lub sij hawm.Hauv kev xyaum, vim muaj qhov sib txawv ntawm cov yam ntxwv xws li photovoltaic thiab lub zog khaws cia ntau dhau thaum lub zog ntawm + / - 1, lub mem tes nqaim yuav tshwm nyob ze zero point tam sim no, xws li reactive fais fab generator SVG, nquag lim APF lub zog ntawm 0, lub nqaim mem tes yuav tshwm nyob ze ntawm qhov siab tshaj plaws load tam sim no, qhov tseeb daim ntawv thov ntawm tam sim no zero point yog feem ntau yuav tshwm sim nyob rau hauv cov zis waveform high-frequency oscillation, EMI teeb meem tshwm sim.
Nqaim mem tes phenomenon ntawm qhov ua rau
Los ntawm cov hauv paus ntsiab lus ntawm semiconductor, lub ntsiab yog vim li cas rau qhov nqaim mem tes tshwm sim yog vim IGBT lossis FWD nyuam qhuav pib tig, tsis tau ntim nrog cov nqa khoom tam sim ntawd, thaum tus cab kuj kis tau thaum kaw IGBT lossis diode nti, piv nrog cov cab kuj tag. puv tom qab kaw, di / dt yuav nce.Qhov sib thooj siab dua IGBT tig-off overvoltage yuav raug tsim nyob rau hauv qhov kev hloov pauv hloov pauv inductance, uas kuj tseem tuaj yeem ua rau muaj kev hloov pauv sai ntawm diode thim rov qab tam sim no thiab yog li snap-off tshwm sim.Txawm li cas los xij, qhov tshwm sim no muaj feem xyuam nrog IGBT thiab FWD chip technology, ntaus ntawv voltage thiab tam sim no.
Ua ntej, peb yuav tsum pib los ntawm classic ob chav mem tes schematic, cov duab hauv qab no qhia tau hais tias qhov hloov pauv ntawm IGBT rooj vag tsav voltage, tam sim no thiab voltage.Los ntawm kev tsav tsheb logic ntawm IGBT, nws tuaj yeem muab faib ua qhov nqaim pulse tawm lub sij hawm toff, uas ua tau sib raug rau lub sij hawm zoo conduction ton ntawm diode FWD, uas muaj kev cuam tshuam zoo rau qhov rov qab rov qab ncov tam sim no thiab rov qab ceev, xws li point A. nyob rau hauv daim duab, lub siab tshaj plaws lub zog ntawm kev rov qab tsis tuaj yeem tshaj qhov txwv ntawm FWD SOA;thiab nqaim mem tes tig lub sij hawm tuj, qhov no muaj qhov cuam tshuam loj rau IGBT tig-tawm txheej txheem, xws li point B hauv daim duab, feem ntau yog IGBT tig-tawm voltage spikes thiab tam sim no trailing oscillations.
Tab sis qhov nqaim dhau ntawm cov khoom siv hluav taws xob tig-tawm yuav ua rau muaj teeb meem dab tsi?Hauv kev xyaum, qhov tsawg kawg nkaus pulse dav txwv uas tsim nyog yog dab tsi?Cov teeb meem no nyuaj rau muab cov qauv thoob ntiaj teb los xam ncaj qha nrog cov kev xav thiab cov qauv, kev tsom xam thiab kev tshawb fawb kuj tseem me me.Los ntawm qhov kev sim tiag tiag waveform thiab cov txiaj ntsig kom pom daim duab hais lus, tsom xam thiab cov ntsiab lus ntawm cov yam ntxwv thiab qhov sib xws ntawm daim ntawv thov, muaj txiaj ntsig zoo dua los pab koj nkag siab qhov tshwm sim no, thiab tom qab ntawd txhim kho qhov tsim kom tsis txhob muaj teeb meem.
IGBT nqaim mem tes tig-on
IGBT raws li kev hloov pauv, siv cov xwm txheej tiag tiag los saib daim duab los hais txog qhov tshwm sim no yog kev ntseeg ntau dua, kom muaj qee yam khoom qhuav.
Siv lub tshuab hluav taws xob siab IGBT4 PrimePACK ™ FF1000R17IE4 raws li cov khoom siv ntsuas, lub cuab yeej tig tawm cov yam ntxwv thaum lub tuj hloov raws li cov xwm txheej ntawm Vce = 800V, Ic = 500A, Rg = 1.7Ω Vge = +/-15V, Ta = 25 ℃, liab yog lub collector Ic, xiav yog qhov voltage ntawm ob qho kawg ntawm IGBT Vce, ntsuab yog tus tsav voltage Vge.Vge.pulse ton txo qis los ntawm 2us mus rau 1.3us kom pom qhov kev hloov pauv ntawm qhov hluav taws xob qhov hluav taws xob no Vcep, daim duab hauv qab no pom qhov ntsuas waveform zuj zus kom pom cov txheej txheem hloov pauv, tshwj xeeb tshaj yog pom hauv lub voj voog.
Thaum ton hloov tam sim no Ic, nyob rau hauv Vce dimension kom pom qhov kev hloov ntawm cov yam ntxwv tshwm sim los ntawm ton.Daim duab sab laug thiab sab xis qhia qhov voltage spikes Vce_peak ntawm qhov sib txawv tam sim no Ic nyob rau hauv tib Vce = 800V thiab 1000V cov xwm txheej feem.los ntawm cov txiaj ntsig kev ntsuam xyuas, tuj muaj qhov cuam tshuam me me ntawm qhov voltage spikes Vce_peak ntawm cov dej me me;Thaum lub sijhawm tig-tawm tam sim no nce, qhov nqaim mem tes tig-tawm yog qhov ua rau muaj kev hloov pauv tam sim no thiab tom qab ntawd ua rau muaj hluav taws xob siab.Noj cov duab sab laug thiab sab xis raws li kev sib koom ua ke rau kev sib piv, tuj muaj kev cuam tshuam ntau dua rau cov txheej txheem kaw thaum Vce thiab tam sim no Ic siab dua, thiab feem ntau yuav muaj kev hloov tam sim no.Los ntawm kev ntsuam xyuas kom pom qhov piv txwv no FF1000R17IE4, qhov tsawg kawg nkaus pulse tuj lub sij hawm tsim nyog tsis tsawg tshaj li 3us.
Puas muaj qhov sib txawv ntawm qhov kev ua tau zoo ntawm cov khoom siv siab tam sim no thiab cov qauv qis tam sim no ntawm qhov teeb meem no?Siv FF450R12ME3 nruab nrab lub zog module ua piv txwv, cov duab hauv qab no qhia tau hais tias qhov hluav taws xob overshoot thaum lub tuj hloov pauv rau cov ntsuas sib txawv Ic.
Cov txiaj ntsig zoo sib xws, cov nyhuv ntawm tuj ntawm qhov hluav taws xob hluav taws xob overshoot yog qhov tsis txaus ntseeg ntawm cov xwm txheej tam sim no qis dua 1/10 * Ic.Thaum qhov tam sim no nce mus rau qhov ntsuas tam sim no ntawm 450A lossis txawm tias 2 * Ic tam sim no ntawm 900A, qhov hluav taws xob overshoot nrog tuj dav yog qhov pom tseeb heev.Txhawm rau ntsuas qhov ua tau zoo ntawm cov yam ntxwv ntawm kev ua haujlwm nyob rau hauv cov xwm txheej huab cua, 3 zaug ntawm qhov ntsuas tam sim no ntawm 1350A, qhov hluav taws xob hluav taws xob tau tshaj qhov thaiv qhov hluav taws xob, tau muab tso rau hauv cov nti ntawm qee qhov hluav taws xob, ywj siab ntawm qhov dav dav. .
Cov duab hauv qab no qhia txog kev sib piv cov qauv ntsuas ntawm ton = 1us thiab 20us ntawm Vce = 700V thiab Ic = 900A.Los ntawm qhov kev sim tiag tiag, lub module pulse dav ntawm ton = 1us tau pib oscillate, thiab qhov voltage spike Vcep yog 80V siab dua ton = 20us.Yog li, nws raug pom zoo tias lub sij hawm mem tes yam tsawg kawg nkaus yuav tsum tsis txhob tsawg dua 1us.
FWD nqaim mem tes tig-on
Nyob rau hauv ib nrab-bridge Circuit Court, IGBT tig-tawm mem tes toff sib raug rau FWD tig-on lub sij hawm ton.Daim duab hauv qab no qhia tau hais tias thaum lub sijhawm FWD tig rau tsawg dua 2us, FWD rov qab qhov siab tam sim no yuav nce ntawm qhov ntsuas tam sim no ntawm 450A.Thaum toff ntau dua 2us, lub ncov FWD rov qab rov qab tam sim no yeej tsis hloov pauv.
IGBT5 PrimePACK™ 3 + FF1800R17IP5 los soj ntsuam cov yam ntxwv ntawm lub zog hluav taws xob diodes, tshwj xeeb tshaj yog nyob rau hauv cov xwm txheej tam sim no qis nrog kev hloov pauv, kab hauv qab no qhia txog VR = 900V, 1200V cov xwm txheej, hauv qhov tam sim no me me IF = 20A cov xwm txheej ntawm kev sib piv ncaj qha ntawm ob lub waveforms, nws yog tseeb hais tias thaum ton = 3us, lub oscilloscope twb tsis tau tuav lub amplitude ntawm no high zaus oscillation.Qhov no kuj ua pov thawj tias qhov siab-zaus oscillation ntawm cov load tam sim no dhau xoom taw tes hauv cov ntawv thov siv hluav taws xob siab thiab FWD lub sijhawm luv luv rov qab txheej txheem rov qab zoo sib xws.
Tom qab saib lub intuitive waveform, siv cov ntaub ntawv tiag tiag los ntxiv kom muaj nuj nqis thiab sib piv cov txheej txheem no.dv / dt thiab di / dt ntawm lub diode sib txawv nrog toff, thiab qhov me dua lub sij hawm FWD conduction, qhov ceev nws cov yam ntxwv rov qab yuav dhau los.Thaum qhov siab dua VR ntawm ob qho kawg ntawm FWD, raws li lub diode conduction mem tes yuav nqaim, nws diode rov qab ceev yuav nrawm dua, tshwj xeeb yog saib cov ntaub ntawv hauv tuj = 3us tej yam kev mob.
VR = 1200V thaum.
dv/dt = 44.3kV/us;di/dt=14kA/us.
VR = 900V.
dv/dt = 32.1kV/us;di/dt=12.9kA/us.
Nyob rau hauv kev pom ntawm ton = 3us, lub waveform high-frequency oscillation yog khaus, thiab dhau ntawm qhov chaw ua hauj lwm zoo diode, lub sij hawm yuav tsum tsis pub tsawg tshaj 3us los ntawm diode FWD point of view.
Nyob rau hauv cov lus qhia ntawm high-voltage 3.3kV IGBT saum toj no, FWD rau pem hauv ntej conduction lub sij hawm tuj tau hais meej meej thiab yuav tsum tau, noj 2400A / 3.3kV HE3 ua piv txwv, qhov tsawg kawg nkaus diode conduction lub sij hawm ntawm 10us tau qhia meej meej raws li kev txwv, uas yog vim qhov system Circuit Court stray inductance nyob rau hauv high-power daim ntaub ntawv yog tus loj, lub sij hawm switching kuj yog ntev, thiab lub transient nyob rau hauv tus txheej txheem ntawm kev qhib ntaus ntawv Nws yog ib qho yooj yim mus tshaj lub siab tshaj plaws kev tso cai diode hwj chim noj PRQM.
Los ntawm qhov ntsuas qhov tseeb waveforms thiab cov txiaj ntsig ntawm lub module, saib cov duab thiab tham txog qee cov ntsiab lus tseem ceeb.
1. qhov cuam tshuam ntawm pulse width ton ntawm IGBT tig tawm me me tam sim no (txog 1/10 * Ic) me me thiab tuaj yeem tsis quav ntsej.
2. lub IGBT muaj qee yam kev vam khom ntawm mem tes dav ton thaum tig tawm siab tam sim no, qhov me me ntawm lub tuj qhov siab dua qhov voltage spike V, thiab tig-tawm tam sim no trailing yuav hloov sai sai thiab ntau zaus oscillation yuav tshwm sim.
3. Cov yam ntxwv ntawm FWD yuav ua kom cov txheej txheem rov qab los thaum lub sij hawm ua luv luv, thiab qhov luv ntawm FWD raws sij hawm yuav ua rau loj dv/dt thiab di/dt, tshwj xeeb tshaj yog nyob rau hauv qis-tam sim no tej yam kev mob.Tsis tas li ntawd, high-voltage IGBTs tau muab qhov tseeb qhov tsawg kawg nkaus diode tig-rau lub sij hawm tonmin = 10us.
Cov ntawv xeem waveforms tiag tiag hauv daim ntawv tau muab qee lub sijhawm siv tsawg kawg nkaus los ua lub luag haujlwm.
Zhejiang NeoDen Technology Co., Ltd. tau raug tsim thiab xa tawm ntau yam me me thiab qhov chaw tshuab txij li xyoo 2010. Ua kom zoo dua ntawm peb tus kheej muaj kev paub txog R&D, kev cob qhia zoo, NeoDen yeej lub koob npe nrov los ntawm cov neeg siv khoom thoob ntiaj teb.
Nrog lub ntiaj teb muaj nyob hauv ntau dua 130 lub teb chaws, kev ua tau zoo heev, qhov raug siab thiab kev ntseeg siab ntawm NeoDen PNP cov cav tov ua rau lawv zoo meej rau R & D, kev tshaj lij prototyping thiab me me rau nruab nrab batch ntau lawm.Peb muab kev daws teeb meem ntawm ib qho khoom siv SMT nres.
Ntxiv:No.18, Tianzihu Avenue, Tianzihu Town, Anji County, Huzhou City, Zhejiang Province, Suav teb
Xov tooj:86-571-26266266
Post lub sij hawm: May-24-2022