Tsev > Xov xwm > Ntsiab lus

PIN Hwjchim Diode Dynamic Cwj Pwm Thiab Physics-Raws Li Model Parameter Extraction Method

Jan 27, 2018

Raws li cov tub ntxhais kawm ntawm lub hwj chim hluav taws xob, lub tshuab hluav taws xob hluav taws xob ua ke tau ua ib qho tseem ceeb hauv kev tiv thaiv hauv lub neej niaj hnub vim nws tshwm sim nyob rau hauv 70s ntawm lub xyoo pua xeem. Tshwj xeeb nyob rau lub xyoo dhau los, lub ntsej muag ntawm lub ntiaj teb no lub zog tsis muaj zog thiab ib puag ncig deterioration xeem, thiaj li ua tau raws li qhov xav tau ntawm lub zog txuag thiab tshiab lub zog txoj kev loj hlob, lub hwj chim hluav taws xob system hloov hluav taws xob thiab kev ua yog ntau thiab ntau dua siv, txhua yam ntawm hluav taws xob cov khoom siv yog mus rau qhov loj thiab muaj kev ntseeg siab thiab kev coj ua. Raws li ib qho tseem ceeb, lub dag zog siv hluav taws xob siv ntau hauv tsev neeg siv hluav taws xob thiab tshuab hluav taws xob, tshuab hluav taws xob thiab kev siv hluav taws xob, hluav taws xob, nkoj thiab kev lag luam. Nrog rau txoj kev loj hlob ntawm cov hluav taws xob hluav taws xob lub tshuab hluav taws xob tsim tsim thiab kev tsim tshuab, kev ua yeeb yam ntawm lub dag lub zog, xws li qhov muaj zog ntawm qhov muaj zog, kev hloov kho tam sim no, hloov kev poob thiab cov yam ntxwv dynamic, tau zoo heev lawm.


Vim tias cov nqi siab thiab yooj yim rhuav tshem cov khoom siv hluav taws xob, lub tshuab simulation feem ntau yog siv los ua tus qauv tsim.

Qhov tseeb ntawm lub hwj chim hluav taws xob hluav taws xob simulation yog txiav txim siab los ntawm cov qauv thiab qauv tsis siv los ntawm simulation. Kom tau qhov tseeb, txhim khu kev qha thiab cov tswv yim kev coj ua, peb yuav tsum muaj qhov tseeb ntawm lub cev qauv, thiab tsuas yog muaj lub cev tsis muaj tseeb, yog li cov qauv siv hluav taws xob cov khoom hluav taws xob muaj nuj nqis.


Txawm li cas los xij, vim yog qhov kev txwv blockage ntawm cov tuam txhab ua lag luam, qhov tseeb qauv ntawm cov hluav taws xob cov khoom siv hluav taws xob tsis yooj yim kom tau los ntawm tuam ntxhab thiab cov qauv kev sim, uas txwv kev siv cov qauv simulation thiab kev txhim kho ntawm daim ntawv thov ntawv ntaus ntawv. Tau ntau xyoo, yuav ua li cas kom raug cov ntsiab lus tseem ceeb tsis pub dhau lub hwj chim thiab cov khoom siv hluav taws xob tau ua ib lub ntsiab lus kub siab hauv thaj chaw ntawm cov hluav taws xob hluav taws xob. Tus yam ntxwv ntawm qhov sib txawv zog ntawm kev siv hluav taws xob diode qhib thiab kaw yuav muaj kev cuam tshuam nrog lub cev muaj zog, kev ua hauj lwm thiab kev faib rau cov cab kuj hauv cheeb tsam los luj. Ua ntej, hauv kev ntsuam xyuas ntawm cov qauv siv sab hauv thiab cov cwj pwm dynamic ntawm PIN hwjchim diode raws li qhov tseem ceeb tsis paub los txiav txim siab rau lawv cov yam ntxwv ntawm txoj haujlwm; ces siv cov qauv ntawm kev sib xyaw dynamic simulation thiab optimization algorithm rau optimize qhov cim ntawm qhov tseem ceeb ntawm lub hwj chim diode; qhov ua tau zoo ntawm txoj kev thov rau kev qhia txog qhov ntsuas ntawm qhov ntsuas ntawm daim npav (power diode) muaj tseeb.


1 Yooj yim qauv thiab cov yam ntxwv ntawm cov PIN zog diode

Daim duab 1 qhia tau hais tias daim qauv ntawm tus qauv ntawm tus qauv PIN thiab kab tho kev faib tawm. PIN diode muaj ntawm P cheeb tsam P thiab thaj tsam N thiab qhov qis doping concentration ntawm thaj av kuv (N-cheeb tsam). Vim qhov sib ntxiv ntawm kuv cheeb tsam, PIN diodes tuaj yeem ua tau ntau dua qhov thaiv qhov hluav taws xob. Txoj kev sib thooj ua haujlwm ntawm cov diodes tuaj yeem txo los ntawm qhov kev tawm tswv yim thaum muab tso rau hauv cheeb tsam loj loj. Lub tswv yim zoo ntawm lub dag zog, nrog rau kev lag luam thiab tua cov yam ntxwv, raug txiav txim siab los ntawm kev xaav kev sib faib thiab kev hloov ntawm cov cheeb tsam ntawm I, uas yog tus cwj pwm zoo rov qab los ntawm cov cwj pwm txawv zog.

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1.1 Qhib cov yam ntxwv

Phau ntawv qhia nrog lub sijhawm diode ntev tshaj yog yuav tsum tau nrog lub ncov ntawm anode voltage overshoot, tom qab lub sij hawm kom tswj tau, thiab muaj ib qho kev tshuav tsawg heev (saib daim duab 2). Lub sijhawm rov ua haujlwm ntawm qhov diode no yog los ntawm qhov ntev ntawm cov hlau lead, lub pob ntawm lub cuab yeej thiab cov kev cuam tshuam ntawm cov kev ua nyob rau hauv cheeb tsam N cheeb tsam.

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Raws li cov kev txhaj tshuaj loj loj, cov ntsiab lus ntawm cov neeg tsav tsheb tshaj tawm txiav txim qhov kev tuav tswj kev ua haujlwm hauv thaj chaw qis. Cov kab mob ntau heev tshaj tawm hauv cheeb tsam kev txhaj tshuaj yog txiav txim siab los ntawm qhov sib npaug ntawm kev ua haujlwm.


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Hla mus rau - nais npuam ntau heev;

J n - Yam ntxawg tam sim no;

q - Cov nqi them rau tsev;

τ - Tshaj txaij ntau dhau.


Lub qhov hluav taws xob tho tawm sab nraud tsuas yog tshwm sim thaum tam sim no hloov sai heev, thiab lub sijhawm ntev dua lub neej. Qhov tam sim no tsuas yog txiav txim siab los ntawm txoj kev diffusion, thiab cov txheej txheem ntawm cov txheej txheem yuav tsum raug ignored, ces tus electron tam sim no yog

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Tshaj tawm ntau tshaj tawm kev lag luam

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Hauv cov mis, D n yog cov electron diffusion coefficient.

Nyob rau hauv cov txheej txheem ntev ntawm kev rov qab los, qhov ceev nrawm nrog nce nrog tus nqi ntawm ib tug, thiab ntau tshaj qhov kev nyab xeeb ntawm qhov chaw nyob hauv cheeb tsam thaj tsam yog tau.

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Tag nrho electron concentration nyob rau hauv cheeb tsam drift yog

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Thaum nrug ntawm X ntawm PN hlws tsev, ib qho me me ntawm qhov tuab ntawm DX yog xam, thiab qhov tsis kam ntawm thaj av ntawd yog tib yam.

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Qhov ua tau zoo rov qab muaj peev xwm tau txais.

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Hom T M - Hloov siab mus tas li;

V T - Taub thiab qhov sib npaug, V T = k T / q;

ntawm cov plhu Boltzmann tas li, k = 1.38 × 10 -23 J / K;

T - Thermodynamic kub.


1.2 Qhib cov yam ntxwv

Thaum lub diode hauv txoj kev tswj hwm lub xeev siv ib lub nrig rov qab, qhov diode qhov rov qab thaiv qhov muaj peev xwm yuav siv sij hawm kom rov qab, uas yog qhov kev rov qab rov qab. Lub diode yog sib npaug rau ib qho kev luv luv hauv lub xeev ua ntej txoj kev muaj peev xwm raug rov qab los. Raws li pom hauv daim duab 3, ntawm t = t f , qhov tam sim no kuv F ntawm qhov diode txo ntawm qhov tus nqi d yog / d t nyob rau hauv cov nyhuv ntawm qhov hloov ntawm qhov hloov sab nraud. Tus nqi hloov ntawm I F yog los ntawm sab nraud sab nraud voltage E Thiab inductance L hauv lub voj yog txiav txim siab,

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Thaum t = t 0 , tam sim no hauv qhov diode yog sib npaug rau xoom. Ua ntej qhov no, lub diode yog nyob rau tom qab kev ncaj ncees, thiab qhov tam sim no yog qhov zoo tam sim no. Tom qab lub sijhawm t0, qhov poob ntawm qhov chaw nres tsheb poob qis qis me ntsis, tab sis nws tseem zoo zoo, thiab tam sim no pib tig rov qab thiab cov ntaub ntawv rov qab rov qab tam sim no kuv RR . Thaum t = t 1 lub sij hawm, tus nqi Q 1 hauv thaj av nrawm nrawm nrawm lawm, qhov rov qab tam sim no nce mus txog tus nqi siab tshaj ntawm IRM, thiab diode pib rov qab muaj peev xwm ua haujlwm. Tom qab lub sij hawm T1, rau PIN diode, qhov kev sib tw ntawm PN - qhov chaw nyob rau hauv theem rov qab yog siab dua nyob rau lwm thaj chaw. Thaum qhov chaw muaj txheej txheem yog teeb, nws kis tau ceev ceev hauv cheeb tsam N, sai cheb tawm ntawm tus neeg ua haujlwm residual, ua rau muaj kev cia siab poob rau hauv qhov rov qab tam sim no. Vim tias qhov d / d t ntawm qhov nqis ceev ceev tam sim no loj dua, qhov kev poob siab inductor ntawm txoj kab yuav ua kom muaj qhov siab tshaj qhov hluav taws xob. Qhov no qhov hluav taws xob inductive yog superimposed nrog hloov rov qab voltage mus rau diode, thiaj li hais tias diode yuav withstand siab nrawm voltage VRM.


Tom qab t = t 2 , qhov d / dt maj txo qis, qhov inductance voltage tee xoom, diode rov qab rau lub nrawm sab nraud thiab nkag mus rau theem ntawm qhov rov sab nraum zoo li qub. Qhov tseem ceeb tshaj uas cuam tshuam txog kev rov qab ua haujlwm rov qab yog tus nqi rov qab rov qab, uas yog, tus nqi tag nrho ntawm tus nqi Q yog muab tshem tawm thaum rov qab rov qab txheej txheem.

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Pom zoo tias kev ywj pheej nyob hauv cheeb tsam ntawm txoj kab nrawm yuav muaj linearized, yuav tsum tau rov qab ua kom rov qab los thaum lub hwjchim tso tawm ntawm qhov hloov ntawm qhov hloov tam sim no, raws li pom hauv daim duab 4.

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Lub plhaub pob zeb ntawm txoj kab tuav hauv lub xeev tamsim no yuav yog kwv yees los ntawm txoj kev hloov ntawm qhov nruab nrab ntawm qhov nruab nrab ntawm thaj chaw nruab nrab ntawm qhov nruab nrab thiab qhov concentration ntawm x = 0 n (-d) rau qhov nruab nrab cov khoom ntim ntsiab ntawm Na = b. Lub concentration ntawm cov nqa khoom yog

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Txhais tau tias cov neeg ua haujlwm sib nyhav nyob hauv cheeb tsam khiav qis

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Ntaus τ HL - Loj raug ntau tshaj txuag tau txoj sia;

J T - Tuaj tag nrho ntawm qhov diode anode;

J F - Forward tam sim no nti ntawm diode;

L a -Bipolar diffusion ntev.


Nyob rau thawj theem ntawm txoj kev tua, qhov teeb meem ntawm tus PIN rectifier tam sim no hloov ntawm lub xeev dhau qhov ceev (J F ) mus rau zero ntawm qhov t 0 caij. Qhov kawg ntawm thawj theem, tus cab kuj faib ua ncaj vim tias tam sim no xoom ntawm qhov kawg ntawm lub t 0 lub sij hawm. Cov kev hloov hauv tus nqi khaws tseg rau hauv qhov kev ntsuas no yog thaj av

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Ntaus Ib - Tus nqi qis ntawm qhov kev hloov ntawm qhov tam sim no.

Tus t 0 lub caij hloov ntawm xoom tam sim no yog hais txog

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Qhov thib ob theem ntawm txoj kev tua yog tus T 1 lub sij hawm ntawm qhov t 0 lub sijhawm ntawm qhov tam sim no mus rau xoom mus rau P + N hlawv pib pib qhov siab. Lub sij hawm T1 tuaj yeem tau los ntawm kev txheeb xyuas cov nqi uas muab rho tawm los ntawm t = t 0 t o t = t 1 thaum lub sij hawm kaw qhov kev ua tiav. Cov nqi rho tawm thaum lub sijhawm no

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Lub sij hawm T 1 yog

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Thaum txheej txheem thib peb ntawm cov txheej txheem ua haujlwm raug kaw, qhov voltage nyob hauv PIN diode pib nce. Pib, qhov chaw them nqi WSC (T) nthuav dav zuj zus mus raws sijhawm. Nyob rau hauv txoj kev no, tus nqi khaws cia hauv thaj av nrawm yog ntxiv lawm, uas ua rau txo tus nqi rov qab tam sim no tom qab T 1 . Nws yog assumed tias tam sim no yog kwv yees thaum tus nqi cia yog muab rho tawm, thiab thaum P + N hlawv rov qab ntawm lub T 1 lub caij, cov nqi them nqi ntawm lub caij t yog tib yam.

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Qhov chaw them nyiaj qhov muaj nqi

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Qhov chaw them nyiaj tus nqi yuav raug sau raws li

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Qhov rov qab rov qab muaj zog rov qab yog qhov kawg ntawm t = t2 ntawm theem peb.