Lub hauv paus ntsiab lus ntawm kev tsav tsheb ntawm lub zog siab MOSFET yog dab tsi?

Tib lub zog siab MOSFET, kev siv cov tsav sib txawv yuav tau txais cov yam ntxwv sib txawv. Kev siv cov kev ua tau zoo ntawm lub tshuab hluav taws xob tuaj yeem ua rau lub zog hloov hluav taws xob ua haujlwm nyob rau hauv lub xeev kev hloov pauv zoo tshaj plaws, thaum lub sijhawm hloov pauv, txo qis kev hloov pauv, kev teeb tsa kev ua haujlwm, kev cia siab thiab kev nyab xeeb yog qhov tseem ceeb. Yog li ntawd, qhov zoo thiab qhov tsis zoo ntawm lub voj voog tsav ncaj qha cuam tshuam rau kev ua haujlwm ntawm lub ntsiab Circuit Court, qhov kev txiav txim siab ntawm kev tsim ntawm lub voj voog tsav yog qhov tseem ceeb. Thyristor me me, lub teeb yuag, kev ua haujlwm siab, lub neej ntev, siv tau yooj yim, tuaj yeem nres lub rectifier thiab inverter yooj yim, thiab tsis tuaj yeem hloov cov qauv Circuit Court nyob rau hauv qhov chaw ntawm kev hloov qhov loj ntawm rectifier lossis inverter tam sim no.IGBT yog ib qho kev sib xyaw ntaus ntawv ntawmMOSFETthiab GTR, uas muaj cov yam ntxwv ntawm kev hloov ceev ceev, zoo thermal stability, me me tsav lub zog thiab yooj yim tsav Circuit Court, thiab muaj qhov zoo ntawm me me nyob rau hauv lub xeev voltage poob, siab withstand voltage thiab siab txais tam sim no. IGBT raws li cov khoom siv hluav taws xob tseem ceeb, tshwj xeeb tshaj yog nyob rau hauv qhov chaw muaj zog, tau siv ntau yam.

Qhov zoo tshaj plaws tsav tsheb Circuit Court rau high-power MOSFET hloov khoom siv yuav tsum ua tau raws li cov hauv qab no:

(1) Thaum lub hwj chim hloov lub raj yog qhib, lub voj voog tsav tsheb tuaj yeem muab lub hauv paus nrawm nrawm, kom muaj lub zog tsav txaus thaum nws qhib, yog li txo qhov kev poob qis.

(2) Thaum lub sij hawm hloov lub raj xa hluav taws xob, lub hauv paus tam sim no muab los ntawm MOSFET tus neeg tsav tsheb Circuit Court tuaj yeem xyuas kom meej tias lub hwj chim raj yog nyob rau hauv saturated conduction lub xeev nyob rau hauv tej yam kev mob load, kom ntseeg tau tias tsis tshua muaj conduction poob. Txhawm rau txo lub sijhawm khaws cia, lub cuab yeej yuav tsum nyob rau hauv lub xeev tseem ceeb saturation ua ntej kaw.

(3) kaw, tsav Circuit Court yuav tsum muaj txaus rov qab lub hauv paus tsav kom sai sai tshem tawm cov cab kuj nyob rau hauv lub hauv paus cheeb tsam kom txo lub sij hawm cia; thiab ntxiv thim rov qab kev txiav tawm voltage, kom cov khoom siv tam sim no ntog sai kom txo tau lub sijhawm tsaws. Tau kawg, qhov kev kaw ntawm lub thyristor tseem yog los ntawm qhov thim rov qab anode voltage poob kom tiav qhov kaw.

Tam sim no, lub thyristor tsav nrog ib tug sib piv tus naj npawb ntawm tsuas yog los ntawm lub transformer los yog optocoupler cais cais qhov tsawg voltage kawg thiab high voltage kawg, thiab ces los ntawm lub converter Circuit Court tsav lub thyristor conduction. Ntawm IGBT rau tam sim no siv ntau IGBT tsav module, tab sis kuj IGBT kev koom ua ke, kev tswj tus kheej, kev kuaj tus kheej thiab lwm yam kev ua haujlwm ntawm IPM.

Hauv daim ntawv no, rau lub thyristor peb siv, tsim kev sim tsav Circuit Court, thiab nres qhov kev sim tiag tiag los ua pov thawj tias nws tuaj yeem tsav lub thyristor. Raws li kev tsav tsheb ntawm IGBT, daim ntawv no feem ntau qhia txog cov hom tseem ceeb ntawm IGBT tsav tam sim no, nrog rau lawv cov tsav tsheb sib txuas, thiab feem ntau siv optocoupler cais tsav los nres qhov simulation simulation.

2. Thyristor tsav Circuit Court kawm nyob rau hauv dav dav ntawm thyristor kev khiav hauj lwm tej yam kev mob yog:

(1) thyristor lees txais qhov thim rov qab anode voltage, tsis hais lub rooj vag lees txais qhov voltage, lub thyristor nyob rau hauv lub xeev tawm.

(2) Thyristor txais rau pem hauv ntej anode voltage, tsuas yog nyob rau hauv cov ntaub ntawv ntawm lub rooj vag txais ib tug zoo voltage lub thyristor nyob rau.

(3) Thyristor nyob rau hauv lub conduction mob, tsuas yog ib tug zoo anode voltage, tsis hais lub rooj vag voltage, lub thyristor insisted rau conduction, uas yog, tom qab lub thyristor conduction, lub rooj vag ploj. (4) thyristor nyob rau hauv lub conduction mob, thaum lub ntsiab Circuit Court voltage (los yog tam sim no) txo mus rau zero, lub thyristor kaw. Peb xaiv lub thyristor yog TYN1025, nws tiv taus voltage yog 600V txog 1000V, tam sim no mus txog 25A. Nws yuav tsum tau lub rooj vag tsav voltage yog 10V rau 20V, tsav tam sim no yog 4mA rau 40mA. thiab nws cov txij nkawm tam sim no yog 50mA, lub cav tam sim no yog 90mA. DSP lossis CPLD ua rau lub teeb liab amplitude ntev li 5V. Ua ntej tshaj plaws, ntev npaum li qhov amplitude ntawm 5V mus rau 24V, thiab tom qab ntawd los ntawm 2: 1 kev rho tawm transformer los hloov 24V trigger teeb liab mus rau 12V trigger teeb liab, thaum ua tiav cov haujlwm ntawm kev sib cais sab saud thiab qis dua.

Kev sim ntsuas Circuit Court tsim thiab tsom xam

Ua ntej ntawm tag nrho cov, lub boost Circuit Court, vim lub cais transformer Circuit Court nyob rau hauv lub rov qab theem ntawm lubMOSFETntaus ntawv xav tau 15V trigger teeb liab, yog li qhov yuav tsum tau ua ntej amplitude 5V teeb liab teeb liab rau hauv 15V teeb liab teeb liab, los ntawm MC14504 5V teeb liab, hloov mus rau 15V teeb liab, thiab tom qab ntawd los ntawm CD4050 ntawm cov zis ntawm 15V tsav teeb liab shaping, channel 2 yog txuas nrog 5V input teeb liab, channel 1 txuas nrog cov zis Channel 2 txuas nrog 5V input teeb liab, channel 1 txuas nrog cov zis ntawm 15V trigger teeb liab.

Qhov thib ob yog qhov sib cais transformer Circuit Court, lub luag haujlwm tseem ceeb ntawm Circuit Court yog: 15V trigger teeb liab, hloov mus rau 12V trigger teeb liab los ua rau sab nraum qab ntawm thyristor conduction, thiab ua 15V trigger teeb liab thiab qhov nrug ntawm sab nraub qaum. theem.

Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm Circuit Court yog: vim yogMOSFETIRF640 tsav voltage ntawm 15V, yog li, ua ntej ntawm tag nrho cov, nyob rau hauv J1 nkag mus rau 15V square yoj teeb liab, los ntawm cov resistor R4 txuas nrog lub regulator 1N4746, thiaj li hais tias tus trigger voltage yog ruaj khov, tab sis kuj yuav ua rau lub trigger voltage tsis siab dhau. , hlawv MOSFET, thiab tom qab ntawd mus rau MOSFET IRF640 (qhov tseeb, qhov no yog lub raj hloov, kev tswj ntawm qhov kawg ntawm qhov qhib thiab Kev kaw lub nraub qaum kawg ntawm kev tig-tawm thiab tig-tawm), tom qab tswj lub luag haujlwm lub voj voog ntawm lub teeb liab tsav, kom muaj peev xwm tswj tau lub sijhawm tig thiab tig tawm ntawm MOSFET. Thaum lub MOSFET qhib, sib npaug rau nws cov D-ncej hauv av, tawm thaum nws qhib, tom qab lub back-kawg Circuit Court sib npaug rau 24 V. Thiab lub transformer yog los ntawm kev hloov hluav taws xob los ua qhov kawg ntawm 12 V tso zis teeb liab. . Txoj cai kawg ntawm lub transformer yog txuas nrog ib tug rectifier choj, thiab ces lub 12V teeb liab yog tso tawm los ntawm connector X1.

Teeb meem tshwm sim thaum lub sij hawm sim

Ua ntej tshaj plaws, thaum lub hwj chim qhib, lub fuse tam sim ntawd tawg, thiab tom qab ntawd thaum kuaj xyuas lub Circuit Court, nws pom tias muaj teeb meem nrog kev tsim hluav taws xob thawj zaug. Thaum pib, txhawm rau ua kom zoo dua cov txiaj ntsig ntawm nws qhov hloov pauv lub raj tso tawm, 24V hauv av thiab 15V hauv av sib cais, uas ua rau MOSFET lub rooj vag G ncej sib npaug rau sab nraub qaum ntawm S ncej yog raug tshem tawm, uas ua rau muaj kev cuam tshuam tsis tseeb. Kev kho mob yog txuas rau 24V thiab 15V hauv av ua ke, thiab rov ua kom tsis txhob muaj qhov kev sim, lub voj voog ua haujlwm ib txwm. Kev sib txuas hauv Circuit Court yog qhov qub, tab sis thaum koom nrog lub teeb liab tsav, MOSFET cua sov, ntxiv rau lub teeb liab tsav rau lub sijhawm, lub fuse tau tshuab, thiab tom qab ntawd ntxiv cov teeb liab tsav, lub fuse yog ncaj qha tshuab. Tshawb xyuas lub voj voog pom tias lub voj voog ua haujlwm siab ntawm lub teeb liab tsav tsheb loj dhau, ua rau lub sijhawm MOSFET tig rau lub sijhawm ntev dhau. Qhov kev tsim ntawm qhov Circuit Court no ua rau thaum lub MOSFET qhib, 24V ntxiv ncaj qha mus rau qhov kawg ntawm MOSFET, thiab tsis ntxiv qhov kev txwv tam sim no, yog tias lub sijhawm ua haujlwm ntev dhau los ua rau qhov tam sim no loj dhau, MOSFET kev puas tsuaj, qhov yuav tsum tau tswj lub luag hauj lwm voj voog ntawm lub teeb liab yuav tsis loj heev, feem ntau nyob rau hauv lub 10% mus rau 20% los yog li ntawd.

2.3 Kev txheeb xyuas ntawm lub voj voog tsav

Txhawm rau txhawm rau txheeb xyuas qhov ua tau ntawm lub voj voog tsav, peb siv nws los tsav lub thyristor Circuit Court txuas nrog ib leeg, lub thyristor hauv series nrog ib leeg thiab tom qab ntawd los tiv thaiv kev sib luag, nkag mus rau hauv Circuit Court nrog inductive reactance, lub zog mov. yog 380V AC voltage qhov chaw.

MOSFET nyob rau hauv lub voj voog no, lub thyristor Q2, Q8 ua teeb liab los ntawm G11 thiab G12 nkag, thaum Q5, Q11 ua teeb liab los ntawm G21, G22 nkag. Ua ntej lub teeb liab tsav tau txais mus rau qib thyristor rooj vag, txhawm rau txhim kho qhov muaj peev xwm tiv thaiv kev cuam tshuam ntawm thyristor, lub rooj vag ntawm thyristor txuas nrog lub resistor thiab capacitor. Qhov Circuit Court no txuas nrog lub inductor thiab muab tso rau hauv lub ntsiab Circuit Court. Tom qab tswj lub conduction lub kaum sab xis ntawm lub thyristor los tswj cov inductor loj rau hauv lub ntsiab Circuit Court lub sij hawm, lub sab sauv thiab sab circuits ntawm lub theem lub kaum sab xis ntawm lub trigger teeb liab sib txawv ntawm ib nrab ntawm lub voj voog, lub Upper G11 thiab G12 yog lub teeb liab tag nrho. los ntawm kev tsav tsheb ntawm lub hauv ntej theem ntawm kev rho tawm transformer yog cais los ntawm ib leeg, qhov qis G21 thiab G22 kuj raug cais los ntawm tib txoj kev teeb liab. Ob lub cim taw qhia ua rau kev tiv thaiv kev sib txuas thyristor Circuit Court zoo thiab tsis zoo, saum toj no 1 channel txuas nrog tag nrho thyristor circuit voltage, hauv thyristor conduction nws dhau los ua 0, thiab 2, 3 channel txuas nrog thyristor circuit nce thiab nqis. txoj kev taw qhia teeb liab, 4 channel yog ntsuas los ntawm qhov ntws ntawm tag nrho cov thyristor tam sim no.

2 channel ntsuas lub teeb pom kev zoo, ua rau saum lub thyristor conduction, tam sim no yog qhov zoo; 3 channel ntsuas lub teeb liab rov qab, ua rau qis qis ntawm thyristor conduction, tam sim no tsis zoo.

3.IGBT tsav Circuit Court ntawm lub seminar IGBT tsav Circuit Court muaj ntau yam tshwj xeeb thov, summarized:

(1) tsav tus nqi nce thiab poob ntawm qhov hluav taws xob mem tes yuav tsum loj txaus. igbt tig rau, tus thawj ntug ntawm lub rooj vag qhov siab siab yog ntxiv rau lub rooj vag G thiab emitter E ntawm lub rooj vag, kom nws tau nrawm nrawm kom ncav cuag lub sijhawm luv tshaj plaws kom txo qis kev poob. Nyob rau hauv lub IGBT kaw, lub rooj vag tsav Circuit Court yuav tsum muab lub IGBT tsaws ntug yog nruj heev shutdown voltage, thiab mus rau lub IGBT rooj vag G thiab emitter E ntawm qhov tsim nyog reverse bias voltage, kom lub IGBT ceev shutdown, luv lub sij hawm kaw, txo. lub kaw lus poob.

(2) Tom qab IGBT conduction, tsav voltage thiab tam sim no muab los ntawm lub rooj vag tsav Circuit Court yuav tsum txaus amplitude rau IGBT tsav voltage thiab tam sim no, thiaj li hais tias lub hwj chim tso zis ntawm IGBT yog ib txwm nyob rau hauv lub saturated lub xeev. Transient overload, lub zog tsav tsheb muab los ntawm lub rooj vag tsav Circuit Court yuav tsum txaus los xyuas kom meej tias IGBT tsis tawm hauv cheeb tsam saturation thiab puas.

(3) IGBT rooj vag tsav Circuit Court yuav tsum muab IGBT zoo tsav voltage coj tus nqi tsim nyog, tshwj xeeb tshaj yog nyob rau hauv luv luv-circuit kev khiav hauj lwm txheej txheem ntawm cov khoom siv nyob rau hauv lub IGBT, qhov zoo tsav voltage yuav tsum tau xaiv rau qhov tsawg kawg nkaus tus nqi yuav tsum tau. Hloov daim ntawv thov ntawm lub rooj vag voltage ntawm IGBT yuav tsum yog 10V ~ 15V rau qhov zoo tshaj plaws.

(4) Cov txheej txheem kaw IGBT, qhov tsis zoo ntawm qhov tsis zoo ntawm lub rooj vag - emitter yog qhov tsim nyog rau kev kaw nrawm ntawm IGBT, tab sis yuav tsum tsis txhob noj ntau dhau, siv tib yam -2V rau -10V.

(5) nyob rau hauv cov ntaub ntawv ntawm inductive loads loj heev, hloov ceev heev yog teeb meem, loj inductive loads nyob rau hauv lub IGBT ceev tig-on thiab tig-off, yuav tsim high-frequency thiab siab amplitude thiab nqaim dav ntawm spike voltage Ldi / dt , cov ntsia hlau loj tsis yooj yim rau nqus, yooj yim los tsim cov cuab yeej puas.

(6) Raws li IGBT siv nyob rau hauv high-voltage qhov chaw, yog li tsav Circuit Court yuav tsum nrog tag nrho cov tswj Circuit Court nyob rau hauv lub peev xwm ntawm kev sib cais hnyav, qhov zoo tib yam siv high-speed optical coupling cais los yog transformer coupling cais.

Tsav Circuit Court xwm txheej

Nrog rau kev txhim kho ntawm kev siv thev naus laus zis, tam sim no IGBT rooj vag tsav hluav taws xob feem ntau yog tswj los ntawm kev sib xyaw chips. Kev tswj hom tseem yog peb hom:

(1) direct triggering yam tsis muaj hluav taws xob rho tawm ntawm lub tswv yim thiab tso zis teeb liab.

(2) transformer rho tawm tsav nruab nrab ntawm cov tswv yim thiab cov teeb liab tawm siv mem tes transformer cais, kev rho tawm voltage mus txog 4000V.

Muaj 3 txoj hauv kev raws li hauv qab no

Passive mus kom ze: qhov tso zis ntawm qhov hloov pauv theem nrab yog siv los tsav ncaj qha rau IGBT, vim muaj kev txwv ntawm qhov sib npaug ntawm qhov sib npaug ntawm qhov sib npaug, nws tsuas yog siv tau rau qhov chaw uas lub voj voog lub luag haujlwm tsis hloov ntau.

Txoj kev nquag: lub transformer tsuas yog muab cov cim cais, nyob rau hauv cov khoom siv hluav taws xob thib ob kom tsav IGBT, tsav waveform zoo dua, tab sis qhov yuav tsum tau muab cais lub zog.

Txoj kev muab tus kheej: pulse transformer yog siv los xa ob qho tib si tsav lub zog thiab kev hloov pauv siab zaus thiab kev siv tshuab demodulation rau kev xa cov cim logic, muab faib ua hom kev hloov kho tus kheej thiab kev siv lub sijhawm sib koom siv tus kheej, hauv qhov kev hloov pauv. -type self-supply power rau tus choj rectifier los tsim cov khoom siv hluav taws xob uas xav tau, kev hloov pauv siab zaus thiab kev siv tshuab demodulation kom xa cov cim logic.

3. Sib cuag thiab sib txawv ntawm thyristor thiab IGBT tsav

Thyristor thiab IGBT tsav Circuit Court muaj qhov sib txawv ntawm qhov chaw zoo sib xws. Ua ntej tshaj plaws, ob lub tshuab hluav taws xob yuav tsum tau cais tawm cov khoom siv hloov pauv thiab cov tswj Circuit Court ntawm ib leeg, kom tsis txhob muaj hluav taws xob hluav taws xob muaj feem cuam tshuam rau kev tswj xyuas Circuit Court. Tom qab ntawd, ob qho tib si raug siv rau lub rooj vag tsav teeb liab kom ua rau lub tshuab hloov pauv rau. Qhov txawv yog tias thyristor tsav yuav tsum muaj lub teeb liab tam sim no, thaum lub IGBT xav tau lub teeb liab voltage. Tom qab kev hloov khoom siv hluav taws xob, lub rooj vag ntawm thyristor tau poob kev tswj hwm ntawm kev siv lub thyristor, yog tias koj xav kaw lub thyristor, lub thyristor terminals yuav tsum tau ntxiv rau qhov rov qab voltage; thiab IGBT shutdown tsuas yog yuav tsum tau ntxiv rau lub rooj vag ntawm qhov tsis zoo tsav hluav taws xob, kom kaw IGBT.

4. Cov lus xaus

Daim ntawv no tsuas yog muab faib ua ob feem ntawm cov lus piav qhia, thawj feem ntawm thyristor tsav Circuit Court thov kom nres cov lus piav qhia, tus tsim ntawm cov khoom siv hluav taws xob sib txuas, thiab cov qauv tsim ntawm Circuit Court yog siv rau cov tswv yim thyristor circuit, los ntawm kev simulation. thiab kev sim los ua pov thawj qhov ua tau ntawm lub voj voog tsav, cov txheej txheem sim tau ntsib hauv kev txheeb xyuas cov teeb meem tau nres thiab daws. Qhov thib ob ntawm qhov kev sib tham tseem ceeb ntawm IGBT ntawm qhov kev thov ntawm lub voj voog tsav, thiab ntawm lub hauv paus no los qhia ntxiv txog qhov tam sim no siv IGBT tsav Circuit Court, thiab lub ntsiab optocoupler cais tsav Circuit Court kom nres qhov simulation thiab sim ua pov thawj, feasibility ntawm tsav Circuit Court.