Waa maxay ifafaalaha garaaca cidhiidhiga ah
Sida nooc ka mid ah korontadu, IGBT waxay u baahan tahay waqti falcelin gaar ah laga bilaabo calaamadda heerka albaabka ilaa habka beddelka aaladda, si la mid ah sida ay u fududahay in gacanta lagu tuujiyo si degdeg ah nolosha si loogu beddelo albaabka, garaaca garaaca gaaban ee furitaanka ayaa laga yaabaa inuu keeno mid aad u sarreeya. korontadu ama dhibaatooyinka oscillation soo noqnoqda sare.Dhacdadani waxay u dhacdaa si aan fiicneyn waqti ka waqti iyadoo IGBT ay wataan calaamado la isku hagaajiyay oo PWM ah.Inta yar ee wareegga waajibaadka, waa ay fududahay in la soo saaro garaacyada cidhiidhiga ah, iyo sifooyinka soo kabashada ee IGBT ka hortagga isbarbardhigga diode FWD waxay noqdaan kuwo degdeg ah inta lagu jiro cusboonaysiinta si adag.Ilaa 1700V / 1000A IGBT4 E4, qeexitaanka heerkulka isgoysyada Tvj.op = 150 ℃, waqtiga beddelka tdon = 0.6us, tr = 0.12us iyo tdoff = 1.3us, tf = 0.59us, tf = 0.59us, ballaca garaaca wadnaha cidhiidhi ah ma noqon karo wax ka yar marka loo eego wadarta wakhtiga beddelka tilmaanta.Ficil ahaan, iyada oo ay ugu wacan tahay sifooyinka culeyska kala duwan sida sawir-qaadista iyo kaydinta tamarta si xad dhaaf ah marka qodobka awoodda +/- 1, garaaca garaaca wadnaha cidhiidhi ah ayaa ka soo muuqan doona meel u dhow eber hadda, sida koronto dhaliyaha SVG, shaandhada firfircoon ee awoodda APF ee 0, garaaca cidhiidhiga ah ayaa ka soo muuqan doona meel u dhow culeyska ugu badan ee hadda jira, codsiga dhabta ah ee hadda ku dhow barta eber waxay u badan tahay inuu ka soo muuqdo waveform-ka soo-saarka mowjadaha soo noqnoqda ee soo noqnoqda, dhibaatooyinka EMI ayaa soo baxaya.
Dhacdada garaaca wadnaha cidhiidhi ah ee sababta
Laga soo bilaabo aasaaska semiconductor, sababta ugu weyn ee ifafaale garaaca wadnaha cidhiidhi ah waxaa sabab u ah IGBT ama FWD hadda bilaabay inuu shido, oo aan isla markiiba ka buuxsanayn sideyaal, marka sideyaal ku faafo marka la xiro IGBT ama chip diode, marka la barbar dhigo side gebi ahaanba. buuxinta xiritaanka ka dib, di / dt wuu kordhin karaaU dhiganta sare ee IGBT-daminta xad-dhaafka ah ayaa la soo saari doonaa iyada oo la raacayo inductance-ka-wareegga safarka, taas oo sidoo kale sababi karta isbeddel degdeg ah oo beddela diode soo kabashada hadda oo sidaas awgeed ifafaale degdeg ah.Si kastaba ha ahaatee, dhacdadani waxay si dhow ula xiriirtaa IGBT iyo FWD tignoolajiyada chip-ka, tamarta qalabka iyo hadda.
Marka hore, waa inaan ka bilownaa qaabdhismeedka garaaca wadnaha ee caadiga ah, jaantuskan soo socdaa wuxuu muujinayaa macquulka beddelka ee danab wadida albaabka IGBT, hadda iyo danab.Laga soo bilaabo macquulnimada wadista ee IGBT, waxa loo qaybin karaa garaaca garaaca cidhiidhi off time toff, taas oo dhab ahaantii u dhiganta ton time conduction ton of diode FWD, taas oo saameyn weyn ku leh soo kabashada gadaal ee hadda iyo xawaaraha soo kabashada, sida dhibic A. shaxanka, awoodda ugu sarreysa ee soo kabashada gadaal kama dhaafi karto xadka FWD SOA;iyo garaaca garaaca garaaca wadnaha oo cidhiidhi ah, tani waxay saamayn wayn ku leedahay habka daminta IGBT, sida barta B ee shaxanka, badiyaa IGBT-damiyada danabyada danabyada iyo dhaqdhaqaaqyada hadda socda.
Laakin daminta qalabka garaaca wadnaha aadka u cidhiidhi ah ayaa keeni doona maxaa dhibaato ah?Ficil ahaan, waa maxay xadka ballaca garaaca wadnaha ugu yar ee macquul ah?Dhibaatooyinkani way adagtahay in laga soo saaro qaacido caalami ah oo si toos ah loogu xisaabiyo aragtiyo iyo qaacido, falanqaynta aragtida iyo cilmi-baadhistu sidoo kale waa yar yihiin.Laga soo bilaabo qaabka tijaabada dhabta ah iyo natiijooyinka si aad u aragto garaafka si aad u hadasho, falanqaynta iyo soo koobida sifooyinka iyo waxyaabaha ay wadaagaan codsiga, aad u fiican si ay kaaga caawiyaan inaad fahamto dhacdadan, ka dibna kor u qaad naqshadeynta si looga fogaado dhibaatooyinka.
IGBT garaaca garaaca wadnaha cidhiidhi ah shid
IGBT sida beddelka firfircoon, adeegsiga kiisaska dhabta ah si loo arko garaafka si looga hadlo dhacdadan ayaa ah mid lagu qanci karo, in la haysto alaab qallalan.
Isticmaalka moduleka awoodda sare leh IGBT4 PrimePACK™ FF1000R17IE4 shayga tijaabada ah, aaladda damisa sifooyinka marka tonku is beddelo shuruudaha Vce=800V, Ic=500A, Rg=1.7Ω Vge=+/-15V, Ta= 25℃, casaanku waa ururiyaha Ic, buluuga waa danabka labada daraf ee IGBT Vce, cagaarka waa danab wadista Vge.Vge.garaaca garaaca wadnaha ayaa hoos u dhacaya min 2us ilaa 1.3us si loo arko isbedelka koronta Vcep, sawirka soo socda ayaa si tartiib tartiib ah u sawiraya qaabka tijaabada si loo arko habka isbeddelka, gaar ahaan ka muuqda goobada.
Marka ton uu beddelo Ic-ga hadda, cabbirka Vce si loo arko isbeddelka sifooyinka uu sababay ton.Garaafyada bidix iyo midig waxay muujinayaan xadhkaha korantada Vce_peak ee socodka kala duwan ee Ic ee hoos yimaada isla Vce=800V iyo 1000V xaaladaha siday u kala horreeyaan.Natiijooyinka tijaabada ah ee kala duwan, ton ayaa saameyn yar ku leh xajmiyada korantada ee Vce_peak ee qulqulka yaryar;marka daminta dabka uu bato, daminta garaaca wadnaha ee cidhiidhiga ah waxay u nugul yahiin isbedelada degdega ah ee hadda oo ka dib waxay sababtaa koronto sare.Qaadashada garaafyada bidix iyo midig ee isku-duwayaasha isbarbardhigga, ton ayaa saameyn weyn ku leh habka xirida marka Vce iyo hadda Ic ay sarreeyaan, waxayna u badan tahay inay yeeshaan isbeddel degdeg ah hadda.Laga bilaabo tijaabada si aad u aragto tusaalahan FF1000R17IE4, garaaca garaaca wadnaha ugu yar wakhtiga ugu macquulsan oo aan ka yarayn 3us.
Ma jiraa farqi u dhexeeya waxqabadka cutubyada hadda jira iyo kuwa hooseeya ee hadda jira ee arrintan?Qaado FF450R12ME3 module awood dhexdhexaad ah tusaale ahaan, shaxanka soo socdaa wuxuu muujinayaa korontada xad-dhaafka ah marka tan uu isbeddelo qulqulka tijaabada ee kala duwan Ic.
Natiijooyin la mid ah, saamaynta ton-ka ee daminta korantada xad-dhaafka ah ayaa ah mid aan yarayn xaaladaha hadda hooseeya ee ka hooseeya 1/10 * Ic.Marka hadda la kordhiyo ilaa heerka la qiimeeyay ee 450A ama xitaa 2 * Ic hadda ee 900A, korontada xad dhaafka ah ee balaca tan waa mid aad u cad.Si loo tijaabiyo waxqabadka sifooyinka xaaladaha hawlgalka ee xaaladaha aadka u daran, 3 jeer wakhtiga lagu qiimeeyay 1350A, xajinta korantada ayaa dhaaftay korantada xannibaadda, iyada oo lagu dhejiyay chip-ka heer korantada gaar ah, oo ka madax bannaan ballaca tan .
Jaantuska soo socdaa wuxuu muujinayaa qaababka tijaabada isbarbardhigga ee ton=1us iyo 20us ee Vce=700V iyo Ic=900A.Laga soo bilaabo tijaabada dhabta ah, balaca garaaca garaaca moduleka ee ton=1us ayaa bilaabay inuu gariiro, iyo korontadu Vcep waa 80V ka saraysa tan=20us.Sidaa darteed, waxaa lagu talinayaa in waqtiga ugu yar ee garaaca wadnaha uusan ka yarayn 1us.
FWD garaaca garaaca wadnaha cidhiidhi daar
Wareegga nuska buundada, garaaca garaaca garaaca wadnaha ee IGBT wuxuu u dhigmaa wakhtiga daaritaanka FWD.Jaantuska hoose waxa uu tusinayaa in marka wakhtiga soo jeedinta FWD uu ka yaraado 2us, FWD-ga rogaal celiska ah ee hadda uu kor u kaco marka la qiimeeyo wakhtiga xaadirka ah ee 450A.Marka toff ay ka weyn tahay 2us, FWD-ga ugu sarreeya ee soo kabashada hadda asal ahaan isma beddelo.
IGBT5 PrimePACK ™ 3 + FF1800R17IP5 si aad u ilaaliso sifooyinka awood sare leh, gaar ahaan xaaladaha hooseeya ee isbeddelka ton, safka soo socdaa wuxuu muujinayaa VR = 900V, 1200V xaaladaha, gudaha yar ee hadda jira IF = 20A xaaladaha isbarbardhigga tooska ah Labada mawjadood, way caddahay in marka ton = 3us, oscilloscope-ku uu awoodi waayay inuu qabto Baaxadda oscillation-ka sarreeya.Tani waxay sidoo kale caddaynaysaa in dhaqdhaqaaqa-soo noqnoqda sare ee culeyska hadda ka sarreeya eber ee codsiyada qalabka awoodda sare iyo habka soo kabashada ee FWD ee wakhtiga gaaban ay si dhow ula xiriiraan.
Ka dib markaad eegto qaabka mowjadda dareenka leh, isticmaal xogta dhabta ah si aad u sii qiyaasto oo aad barbar dhigto habkan.dv/dt iyo di/dt ee diode-ku way ku kala duwan yihiin toff, iyo hadba inta yar ee wakhtiga haynta FWD, si dhakhso ah ayay u noqonayaan sifooyinkiisa.Marka uu sareeyo VR-da labada daraf ee FWD, sida garaaca garaaca diode-ku uu noqdo mid cidhiidhi ah, xawaarihiisa dib u soo kabashada diode waa la dardar gelin doonaa, gaar ahaan eegaya xogta tan = 3us xaaladaha.
VR = 1200V marka.
dv/dt=44.3kV/us;di/dt=14kA/annaga.
VR=900V.
dv/dt=32.1kV/us;di/dt=12.9kA/us.
Marka loo eego ton=3us, mowjadda waveform ee soo noqnoqoshada soo noqnoqoshada waa mid aad u daran, oo ka baxsan goobta shaqada ee badbaadada leh, wakhtiga ku habboon waa in aanu ka yarayn 3us dhinaca aragtida FWD diode.
Marka la eego qeexitaanka tamarta sare ee 3.3kV IGBT ee kor ku xusan, wakhtiga gudbinta FWD ton si cad ayaa loo qeexay oo loo baahan yahay, iyadoo la qaadanayo 2400A/3.3kV HE3 tusaale ahaan, wakhtiga ugu yar ee korantada diode ee 10us ayaa si cad loo siiyay xad ahaan, taas oo inta badan sababta oo ah nidaamka wareegga qallooca inductance ee codsiyada awoodda sare waa mid aad u weyn, wakhtiga beddelka waa mid dheer, iyo ku-meel-gaadhka habka furitaanka qalabka Way fududahay in la dhaafo ugu badnaan isticmaalka awoodda diode ee PRQM.
Laga soo bilaabo qaab-dhismeedka imtixaanka dhabta ah iyo natiijooyinka cutubka, fiiri garaafyada oo ka hadal kooban kooban oo aasaasi ah.
1. Saamaynta ballaca garaaca garaaca wadnaha ee IGBT demi hadda yar (qiyaastii 1/10 * Ic) waa mid yar oo dhab ahaantii waa la iska indho tiri karaa.
2. IGBT waxay leedahay ku tiirsanaan gaar ah oo ku saabsan garaaca balaadhka garaaca wadnaha marka la demiyo hadda sare, inta yar ee tan ayaa sare u qaadi doonta korontada V, daminta raadraaca hadda socda ayaa si lama filaan ah isu beddeli doona waxaana dhici doona gariir heersare ah.
3. Sifooyinka FWD waxay dedejiyaan habka soo kabashada ee dib u soo kabashada marka wakhtiga loogu talagalay uu noqdo mid gaaban, iyo gaabanaanta FWD wakhtiga loogu talagalay waxay keeni doontaa dv/dt iyo di/dt weyn, gaar ahaan xaaladaha hoose ee hadda jira.Intaa waxaa dheer, IGBT-yada korantada-sare waxa lasiiyaa wakhtiga ugu yar ee diode-ka tonmin=10us.
Qaababka mawjadaha tijaabada ah ee warqadda ku jira ayaa siisay waqti tixraac ah oo ugu yar ee lagu ciyaaro.
Zhejiang NeoDen Technology Co., Ltd. ayaa wax soo saarka iyo dhoofinta noocyo kala duwan oo mashiinada picking iyo meelaynta tan iyo 2010. Ka faa'iidaysiga ee our qani ah R & D khibrad u gaar ah, wax soo saarka si fiican u tababaran, NeoDen ku guulaysato sumcad weyn ka macaamiisha caalamka oo dhan.
Joogitaanka caalamiga ah ee in ka badan 130 waddan, waxqabadka ugu fiican, saxnaanta sare iyo isku halaynta mashiinnada NeoDen PNP ayaa ka dhigaya kuwo ku habboon R&D, prototying xirfadeed iyo wax soo saar yar iyo dhexdhexaad ah.Waxaan bixinaa xal xirfadeed ee hal joogsiga qalabka SMT.
Ku dar:No.18, Tianzihu Avenue, Magaalada Tianzihu, Degmada Anji, Magaalada Huzhou, Gobolka Zhejiang, Shiinaha
Taleefanka:86-571-26266266
Waqtiga boostada: May-24-2022