Daim ntawv thov ntawm IGBT zog hluav taws xob
Peb yog ib lub tuam txhab luam ntawv loj hauv Shenzhen Tuam Tshoj. Peb muaj cov phau ntawv luam tawm, phau ntawv xov xwm luam ntawv, phau ntawv luam ntawv, phau ntawv nyuaj, phau ntawv luam tawm, phau ntawv luam tawm, phau ntawv luam tawm, lub thawv ntim, daim qhia ntawv, txhua yam ntawm PVC, cov ntawv qhia zaub mov, ntawv sau cia, hom tshwj xeeb ntawv xim luam tawm khoom, kev ua si cardand li ntawd.
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IGBTs yog dav siv hauv hluav taws xob hauv cov khoom siv los sawv cev los ntawm cov khoom hluav taws xob thiab ntau hom khoom siv fais fab. IGBT combines qhov zoo ntawm bipolar fais fab transistors thiab fais fab MOSFETs, thiab muaj qhov zoo ntawm kev tswjhwm hluav taws xob, lub cev loj impedance, me me tsav fais fab, kev tswj kev tswj yooj yim, kev hloov me me, ceev ceev ceev thiab kev khiav hauj lwm zaus.
Txawm li cas los xij, IGBTs, zoo ib yam li lwm lub hwj chim hluav taws xob, nyob ntawm seb muaj kev sib cog lus hauv circuit thiab kev hloov chaw. Vim li no, tus tsav tsheb thiab kev tiv thaiv ntawm IGBT yog qhov teeb meem thiab kev ua kom pom ntawm kev tsim qauv siv, thiab nws yog qhov tseem ceeb txuas ntawm kev ua lag luam tag nrho.
1 Cov yam ntxwv ua haujlwm IGBT
Lub IGBT yog ib hom khoom siv hluav taws xob (voltage-type control device) uas yuav tsum tau siv me ntsis tsav tam sim no thiab tsav fais fab thiab tuaj yeem ncaj qha mus rau ib qho analog los yog digital ua haujlwm tsis muaj qhov txuas ntxiv. Lub turn-on thiab tig-off ntawm IGBT yog tswj los ntawm lub rooj vag voltage UGE. Thaum lub UGE ntau dua qhov kev tig-ntawm voltage UGE (th), qhov IGBT muab rau. Thaum twg qhov rov qab los yog tsis muaj qhov teeb meem ntawm nruab nrab ntawm lub qhov rooj thiab tus emitter, qhov IGBT muab tua. Tawg.
Zoo tib yam transistor, IGBT tuaj yeem ua haujlwm hauv cheeb tsam kev tawm tsam, thaj tsam ntawm thaj tsam thiab kev txiav tawm ntawm thaj av, thiab nws yog siv los ua ib yam twj paj nruag. Hauv kev tsav hluav taws xob, kev teeb tsa nyob rau hauv thiab tawm xeev ntawm IGBT yog qhov kev tshawb nrhiav, yog li ntawd txoj kev loj hlob ntawm ntug kev thiab qhov poob tawm ntawm ntug ntog.
2 IGBT tsav Circuit Court cai
Cov ntsiab lus hauv qab no yuav tsum muaj cai thaum tsim tus neeg tsav tsheb IGBT.
1) Qhov loj ntawm lub rooj vag sab nraud tsav hluav taws xob yuav muaj feem cuam tshuam txog kev ua haujlwm ntawm Circuit Court thiab yuav tsum raug xaiv kom raug. Thaum cov tsav tsheb khiav mus rau pem hauv ntej, Lub on-pauv ntawm IGBT txo, thiaj li hais tias txoj kev poob rov qab. Txawm li cas los xij, yog tias cov tsav tsheb khiav mus rau pem hauv ntej loj heev, lub luv luv tam sim no IC tsub kom nrog UGE thaum qhov thauj khoom luv luv, uas yuav ua rau lub IGBT muaj cov nyhuv tuav, uas ua rau lub qhov rooj tsis ua haujlwm. Yog li ntawd, qhov IGBT puas tsuaj; Yog hais tias qhov kev tsav tsheb rau pem hauv ntej yog tsawg dhau, qhov IGBT tawm ntawm thaj chaw khib nyiab thaj tsam thiab nkag mus rau hauv thaj chaw tawm tsam, ua rau lub IGBT ua kom tsis taus thiab ua kom puas; siv, 12V ≤ UGE ≤ 18V nyiam dua. Qhov tsis zoo siab ntawm lub qhov rooj tiv thaiv IGBT los ntawm kev ua mis-ua vim yog ntev tshaj tawm tam sim no thaum lub sij hawm kaw. Feem ntau, qhov tsis zoo siab yog xaiv tau 5V. Tsis tas li ntawd, tus tsav tsheb yuav tsum tau muab cov hluav taws xob txaus thiab qhov siab tam sim no tom qab lub IGBT qhib rau, yog li ntawd IGBT tsis tawm hauv thaj chaw ua kev kub ntxhov thiab ua puas tsuaj raws li kev ua hauj lwm thiab kev sib tw tshaj.
2) Qhov ceev ceev thiab tig-tawm ntawm IGBT yog lig kom ua haujlwm ntau zaus thiab txo qhov kev poob haujlwm. Txawm li cas los xij, lub sij hawm hloov ntawm IGBT yuav tsum tsis txhob loj heev nyob rau hauv cov loj inductive, vim high-speed tig-on thiab tig-off yuav ua rau siab ncov siab, uas tej zaum yuav ua IGBT los yog lwm yam khoom kom tawg.
3) Xaiv ib lub rooj sib tham uas tsis tsim nyog RG thiab lub qhov rooj loj peev CG yog qhov tseem ceeb rau tsav lub IGBT. RG me me, lub sij hawm them tus nqi tawm ntawm lub qhov rooj ntawm cov rooj vag tawm me me, uas yuav ua rau muaj kev sib tw loj, uas yuav ua rau IGBT puas; RG loj, uas yog suppress dvce / dt, tab sis yuav nce lub sij hawm switching thiab switching poob ntawm IGBT. . Kev Tsim Nyog CG yog qhov zoo rau suppressing dic / dt, CG loj dhau, thiab lub sij hawm tuaj lig. Yog hais tias CG tsis dhau, cov nyhuv ntawm suppressing dic / dt tsis cuab kev.
4) Thaum lub IGBT raug kaw, lub qhov rooj nkag-emitter tau yooj yim ntxhov los ntawm cov kab tsis muaj zog ntawm IGBT thiab Circuit Court, uas ua rau lub qhov rooj nkag-emitter qhov hluav taws xob ua tus ntaus ua mis-kev ua haujlwm. Yuav kom tiv thaiv tau qhov no los ntawm qhov tshwm sim, muaj peev xwm tiv tauj tau ib qho ntawm cov rooj vag. Ntxiv rau, nyob rau hauv kev siv tswv yim, yuav kom tsis txhob muaj high voltage spikes nyob rau hauv lub rooj vag tsav Circuit Court, nws yog preferable txuas ob tug rov qab series Zener diodes nyob rau hauv parallel ntawm gratings, thiab tus nqi hluav taws xob nqi yuav tsum yog tib yam li qhov zoo thiab tsis zoo rooj vag voltages.
3 HCPL-316J drive Circuit Court
3.1 HCPL-316J sab hauv thiab qauv ua haujlwm
Yog hais tias IGBT muaj qhov teeb meem overcurrent (tus pin 14 pom qhov voltage ntawm IGBT collector = 7V), thiab cov teeb liab tawm tswv yim tseem yuav raug siv rau tus pin 1, lub teeb liab qis qis qis, thiab cov zis B tsawg, qhov thib peb -level Darlington Lub raj yog muab tua, 1 × DMOS qhib rau, thiab qhov sib tw ntawm IGBT rooj vag yog maj mam poob mus ua kom tiav ib lub qhov rooj vag ntog poob qis. Thaum VOUT = 2V, qhov ntawd yog, VOUT outputs qib qis, C taw rau theem qis, taw tes B yog theem siab, 50 × DMOS qhib rau, thiab IGBT lub rooj vev xaib tawm sai sai. Qhov teeb liab ntawm kab xev hla mus rau hauv optocoupler, thiab dhau ntawd dhau ntawm RS qhov nraub qaum-flop, thiab cov Q tawm siab, thiaj li hais tias optocoupler input nkag mus. Nyob rau hauv tib txoj kev, nws yog ib qho ua tau los soj ntsuam qhov teeb meem ntawm tsuas yog undervoltage thiab qhov teeb meem ntawm lub undervoltage thiab overcurrent.
3.2 tsim cov qauv tsim hluav taws xob
VIN +, FAULT thiab RESET nyob rau sab laug ntawm HCPL-316J txuas nrog rau microcomputer feem. R7, R8, R9, D5, D6 thiab C12 muab kev tiv thaiv tawm tswv yim tiv thaiv kom txhob muaj ntau qhov input voltage los ua IGBT, tab sis qhov kev tiv thaiv Circuit Court yuav tsim ib ncua ntawm txog 1μs, uas yog tsis haum rau kev siv thaum lub sij hawm switching tshaj 100kHz. Q3 yog qhov ua haujlwm tseem ceeb tshaj plaws. Thaum ob leeg PWM cov paib (tib npab choj caj npab) yog theem siab, Q3 muab rau, rub lub tswv yim qis qis, kom cov zis kuj qis dua. Cov kev sib tshuam sib tshuam Nruab Nrab, thiab Interlock2 hauv Xws 3 yog txuas nrog lwm 316J Interlock2 thiab Interlock1, feem. R1 thiab C2 ua lub luag haujlwm rau hauv kev txhawb zog thiab lim cov teeb meem txhaum cai. Thaum muaj kev cuam tshuam qhov teeb meem, microcomputer yuav tuaj yeem txais cov ntaub ntawv.
Ntawm cov zis, R5 thiab C7 muaj feem xyuam rau qhov kev khiav ceev uas lub IGBT tau qhib thiab qhov kev poob haujlwm. Kev nce C7 tuaj yeem txo qhov phem / dt. Ua ntej xam lub rooj vag kuj: qhov twg ION yog lub rooj vag tam sim no txhaj rau hauv IGBT thaum muab rau. Yuav kom qhov IGBT tig rau sai sai, tus nqi ntawm IONMAX yog 20A. Output low level VOL = 2v.
C3 yog ib qho tseem ceeb heev, qhov tseem ceeb tshaj plaws yog qhov kev ncua qeeb. Thaum lub kaw lus pib thiab nti pib ua hauj lwm, vim hais tias qhov voltage ntawm lub chaw davhlau ya nyob twg ntawm IGBT tseem ntau ntau dua 7V, yog tias tsis muaj C3, qhov teeb meem luv luv teeb meem yuav raug muab tso tawm, thiab cov zis yuav ncaj qha mus muab tua. Thaum twg lub nti ua hauj lwm nquag, yog tias lub collector voltage ntawm lub nce tuaj, nws yuav rov qab mus rau ib txwm tam sim ntawd. Yog tias tsis muaj C3, qhov teeb meem yuam kev yuav muab xa kom ua IGBT tua los ntawm qhov yuam kev. Txawm li cas los xij, yog tias tus nqi ntawm C3 loj dhau, qhov kev teb yuav ua rau qeeb qeeb, thiab thaum muaj kev kub ntxhov, lub IGBT yuav raug hlawv tawm thaum ncua sijhawm, thiab qhov kev tiv thaiv zoo yog tsis tau. Tus nqi ntawm C3 yog 100pF, thiab qhov kev ncua yog sij hawm
Nyob rau hauv txoj kab sib tsom ntawm lub nruas, ob diodes sib txuas nrog rau hauv, uas tuaj yeem txhim kho lub nrawm sab nraud, qhov no ua rau cov tsav tsheb tsis muaj zog, tab sis qhov rov qab rov qab rau ntawm qhov diode me me, thiab txhua qhov nraub qaum ntawm voltage theem 1000V. Feem ntau, BYV261E raug xaiv, thiab qhov rov qab rov qab rov qab yog 75 ns. Lub luag haujlwm ntawm R4 thiab C5 yog khaws cov yam ntxwv ntawm qhov muag muag ntawm HCLP-316J tom qab muaj teeb liab dhau. Lub hauv paus ntsiab lus yog tias C5 ua tiav ib qhov muag muag tawm los ntawm kev tawm ntawm MOSFET nrog. Nyob rau hauv Xam 3, qhov VOUT tso tawm ntawm VIG kis tau los ntawm ob lub vas nthiv triode thawb tawm rub tawm, uas tuaj yeem tsav tam sim no mus txog 20A, thiab khiav ceev 1700v, 200-300A IGBTs.
3.3 tsav lub zog tsim hluav taws xob
Nyob hauv tus qauv tsim, lub hwj chim ruaj khov yog qhov guarantee rau IGBT ua hauj lwm kom zoo. Lub hwj chim muab coj los rau pem hauv ntej hloov, muaj zog tiv thaiv kev cuam tshuam, tsis muaj lim inductor rau sab nrab sab, thiab tsis tshua muaj tswv yim impedance, kom qhov tso tawm qhov hluav taws xob ntawm lub hwj huam mov tseem ruaj khov nyob rau hauv cov mob hnyav.
Thaum s tig mus rau, + 12v (rau lub hwj huam ruaj khov, kev siab tshaj plaws) qhov siv tau rau sab qauv ntawm lub tshuab hluav taws xob thiab cov hlua txuas nrog S, thiab sab nraud ib sab yog raug khi tawm ntawm lub zog ua haujlwm. Thaum S yog muab tua, lub zog ntawm tus ntxhais yog pub rov qab rau lub hwj huam khoom los ntawm cov thawj diode thiab nws txuas nrog winding kom rov qab pib dua ntawm tus qauv tsim kev lag luam. Tus 555 timer txuas nrog rau ib lub tshuab hlwb hlau. Lub peev xwm ntawm ko taw 2 thiab taw 6 yog hloov ntawm 4 thiab 8 v los ntawm kev them nqi thiab tso tawm C1, kom qhov taw 3 tawm ntawm ib qhov teeb meem ntawm qhov taw hluav taws xob, thiab lub teeb liab xwm yeem yog siv los tswj tus qhib ntawm S. Thiab khawm. + 12v them C1 dhau R1 thiab D2, nws lub sijhawm them yog t1R1C2ln2; paug lub sij hawm t2 = R2C1ln2, nws tawm qib siab thaum them nyiaj, thiab tawm kev qis tshaj thaum tso tawm. Yog li no, txoj hauj lwm piv = t1 / (t1 + t2).
Lub tshuab hluav taws xob yog tsim raws li cov nram qab no: thawj sab nraud txuas rau + 12v, qhov ntev yog 60kHz, thiab ua haujlwm magnetic induction siv Bw O. 15T, theem nrab sab nrauv + 15v tso zis 2A, -5v zis 1 A, efficiency n = 80%, qhov rai qhov ntsuas qhov Km yog O. 5. Qhov tseem ceeb ntawm tus cwj pwm Kc yog 1, thiab cov coil wire uas tam sim no d yog 3 A / mm2. Cov zis muaj peev xwm
PT = (15 + O.6) × 2 × 2 + (5 + O.6) × 1 × 2 = 64W.
Vim tias cov zis qhov hluav taws xob ntawm qhov tsav lub hwj huam yuav txo qis tom qab kev thau khoom, xav txog kev ua haujlwm thiab qhov voj voog kom muaj peev xwm tswj tau cov zis hluav taws xob hauv cov ntawv siv.
4 Xaus
Daim ntawv no tsim cov tsav tsheb uas tsav tau 1400V, 200 ~ 300A IGBT. Lub interlocking ntawm ob IGBTs (tib choj caj npab) yog pom tau hais txog qhov kho vajtse, thiab lub zog tsav tsheb muaj peev xwm ntawm ncaj qha supplying lub hwj chim rau ob IGBTs yog tsim los.
HCPL-316J muab faib ua ob ntu: input IC (sab laug) thiab tso zis IC (sab xis). Cov input thiab output tau siab raws li cov cai ntawm high voltage thiab siab zog IGBT tsav.
Cov kev ua ntawm txhua tus pin yog raws li nram no:
Tus PIN 1 (VIN +) cov teeb meem rau pem suab;
PIN 2 (VIN-) cov tswv yim rov qab;
PIN 3 (VCG1) txuas nrog lub tswv yim fais fab;
Hauv av ntawm lub tswv yim ntawm tus pin 4 (GND);
Foot 5 (RESERT) nti rov pib dua tswv yim;
Taub Hau 6 (FAULT) tso zis hluav taws xob, thaum muaj qhov teeb meem tshwm sim (tso zis rau pem hauv paus voltage undervoltage los yog IGBT luv Circuit Court), qhov teeb meem txhaum cai ntawm lub tshuab optocoupler;
PIN 7 (VLED1 +) optocoupler tus ntsuas tus pin, ncua;
Tus PIN 8 (VLED1-) yog lub hauv paus;
PIN 9, taw 10 (VEE) muab qhov rov qab thuam qhov siab mus rau IGBT;
Tus PIN 11 (VOUT) tawm ib lub teeb liab tsav IGBT;
Ko taw 12 (VC) peb theem Darlington tube collector fais fab mov;
PIN 13 (VCC2) drives qhov voltage source;
PIN 14 (DESAT) IGBT luv-Circuit tam sim no nrhiav kom tau;
PIN 15 (VLED2 +) optocoupler tus ntsuas pin, ncua;
Ko taw 16 (VE) tawm ntawm qhov siv hauv av.
Yog hais tias VIN + feem ntau cov tswv yim, tus pin 14 tsis muaj teeb liab overcurrent, thiab VCC2-VE = 12v txhais tau hais tias qhov tso tawm rau pem hauv ntej tsav voltage yog ib txwm, lub teeb liab tawm sab theem siab, thiab teeb liab thiab undervoltage teeb liab tsawg theem. Ua ntej, peb qhov teeb meem tawm tswv yim rau JP3, D yog tsawg, B yog tsawg, thiab 50 × DMOS tawm. Nyob rau lub sij hawm no, plaub lub xeev ntawm cov tswv yim ntawm JP1 yog qis, siab, qis, thiab qis tshaj ntawm qhov mus rau hauv qab, thiab taw tes siab ntawm point A drives peb theem Darlington lub raj xa mus, thiab IGBT tseem muab rau.