Txhua lub sijhawm ibIGBTtua, qee yam kev ua phem tshwm sim hauv lub sijhawm luv luv.
Kev sib piv ntawm cov hluav taws xob waveform qhia txog IGBT tig-off spike nrog thiab tsis muaj CRE snubber capacitor
Cov hluav taws xob uas ntws los ntawm lub cuab yeej raug cuam tshuam. Lub zog khaws cia rau hauv lub voj voog txoj kev inductance tsis muaj qhov chaw mus. Nws tso tawm ua lub zog hluav taws xob nce siab. Yog tias tsis muaj dab tsi nqus lub zog ntawd, nws tuaj yeem tshaj qhov hluav taws xob ntsuas ntawm IGBT thiab ua rau lub cuab yeej puas tsuaj.
Qhov no yog qhov teeb meem tseeb uas lub snubber capacitor tau tsim los daws. Thiab nws tsim nyog nkag siab kom zoo, vim tias qhov sib txawv ntawm lub snubber capacitor zoo thiab lub nruab nrab qhia tau tias yog qhov tsis ua haujlwm ntawm lub cuab yeej ntau lub hlis lossis ntau xyoo tom qab ntawd, tsis yog hnub thawj zaug.
Txoj Haujlwm ntawm Snubber Capacitor
A lub capacitor snubberzaum hla lub cuab yeej hloov pauv thiab muab lub zog uas tso tawm ntawd rau qhov chaw nyab xeeb mus.
Thaum IGBT kaw, lub capacitor nqus cov tam sim no thiab txwv qhov ceev ntawm qhov voltage nce (dv/dt) thoob plaws lub cuab yeej. Lub luag haujlwm ntawd ua peb yam ib zaug: nws tswj cov voltage spikes, nws txo qhov kev poob switching, thiab nws ua kom cov tam sim no thiab voltage hloov pauv sai sai uas ua rau lub voj voog seem ntxhov siab.
Yuav kom qhov no ua haujlwm tau zoo, ob yam khoom siv hluav taws xob tseem ceeb dua lwm yam: qhov tsis tshua muaj zog sib npaug (ESR) thiab qhov tsis tshua muaj zog sib npaug (ESL). ESR lossis ESL siab ua rau lub capacitor teb qeeb thiab txwv tsis pub nws tuav tau qhov ceev ceev. Qhov no kuj yog vim li cas cov yeeb yaj kiab polypropylene metallized yog cov khoom siv xaiv rau feem ntau cov ntawv thov snubber. Nws muab ESR / ESL qis nrog lub dielectric kho tus kheej, yog li lub capacitor ua haujlwm tau zoo txawm tias tom qab rov ua dua qhov kev ntxhov siab voltage.
Sab hauvSMJ-PCRE lub thawv yas IGBT Snubber Capacitor
CRE's SMJ-P yog lub thawv yas snubber capacitor uas tsim los rau kev tiv thaiv IGBT, nrog rau cov hlau tooj liab tin-plated rau kev teeb tsa yooj yim ncaj qha rau ntawm IGBT module.
CRE SMJ-P lub thawv yas IGBT snubber capacitor nrog cov hlau tooj liab tin-plated
Cov kev ntsuas tseem ceeb:
| Cov Qauv | Cov Lus Qhia Tshwj Xeeb |
| Qhov ntau ntawm lub peev xwm | 0.1μF txog 5.6μF |
| Qhov ntsuas hluav taws xob | 700V DC txog 3000V DC |
| Kev kam rau siab ntawm lub peev xwm | ±5% (J) / ±10% (K) |
| Kub ua haujlwm | -40 ° C txog + 85 ° C (qeb), txog li + 105 ° C qhov kub siab tshaj plaws |
| Tiv taus qhov hluav taws xob | 1.5x qhov ntsuas hluav taws xob DC, 10s |
| Qhov cuam tshuam ntawm kev tawg | tgδ < 0.0005 (C ≤ 1μF) / tgδ < 0.001 (C > 1μF), ntawm 10kHz |
| Kev tiv thaiv rwb thaiv tsev | Rs ≥ 30,000 MΩ (C ≤ 0.33μF) / Rs×C ≥ 10,000s (C > 0.33μF), ntawm 20°C, 100V DC, 60s |
| Kev ua kom nplaim taws qeeb | UL94V-0 |
| Lub neej ntev | 100,000h ntawm qhov ntsuas hluav taws xob, qhov kub thiab txias ≤85 ° C |
| Cov qauv siv los ua piv txwv | IEC 61071, GB/T 17702 |
Qhov kev tsim kho nws tus kheej yog tsim los ntawm tib lub laj thawj raws li kev ua haujlwm hluav taws xob. Lub thawv yas yog kaw nrog cov resin, uas tiv thaiv cov winding los ntawm cov dej noo thiab kev ntxhov siab ntawm lub tshuab. Ob qho tib si axial thiab radial lead configurations muaj, yog li tib lub capacitor tsev neeg tuaj yeem haum rau ntau yam module layouts yam tsis muaj kev tsim kho dua tshiab txhua lub sijhawm.
Ib Qho Lus Qhia Feem Ntau Cov Lus Qhia Tsis Tau: Cov Qauv Lead Tseem Ceeb Npaum Li Capacitance
Feem ntaulub capacitor snubberCov ntsiab lus nres ntawm "siv zaj duab xis polypropylene, nws kho nws tus kheej." Qhov ntawd yog qhov tseeb, tab sis nws tsuas yog ib nrab ntawm zaj dab neeg engineering, thiab nws yog ib nrab uas tsis txiav txim siab seb ib feem twg ua haujlwm hauv ib lub voj voog.
Ib nrab ntxiv yog lub voj inductance. Tus nqi capacitance ib leeg tsis lav qhov voltage qis yog tias lub capacitor tus kheej-inductance tseem siab, vim tias qhov inductance seem hauv lub voj ntawm cov terminals thiab cov kev sib txuas sab hauv yog nws tus kheej lub luag haujlwm rau kev tsim kom muaj voltage spike lossis transient. Hauv lwm lo lus, ib feem muaj peev xwm siab nrog cov xov hlau ntev, nyias tuaj yeem ua haujlwm tsis zoo ib feem me me nrog cov terminals luv, dav.
Daim duab piv rau qhov inductance ntawm cov terminals capacitor snubber ntev thiab direct-mount
Qhov no kuj yog vim li cas txoj kev teeb tsa tseem ceeb dua li nws zoo li ntawm daim ntawv teev cov ntaub ntawv. Cov capacitors nrog cov davhlau ya nyob twg dav, tiaj tus uas tuaj yeem ntsia ncaj qha rau ntawm IGBT module ua tiav qis dua tus kheej-inductance dua li cov khoom txuas nrog los ntawm cov xov hlau ntev. SMJ-P's tin-plated tooj liab ntxig cov hlau thiab kev xaiv ntawm axial lossis radial configuration muaj nyob rau qhov laj thawj no: kom txoj kev sib txuas luv luv thiab cia lub peev xwm ntsuas tau xa cov kev tiv thaiv dv / dt nws tau teev tseg rau.
Qhov khoom siv kho tus kheej tseem ceeb, sib cais. Ib daim zaj duab xis polypropylene uas muaj cov khoom siv hlau uas muaj qhov tawg dielectric hauv zos yuav cais qhov ntawd ua yuam kev hauv microseconds, es tsis txhob ua tsis tiav kiag li, yog vim li cas daim zaj duab xis tseem yog tus qauv dielectric rau daim ntawv thov no dua li cov khoom siv ceramic lossis electrolytic. Tab sis kev kho tus kheej thiab kev ua haujlwm qis yog ob qho teeb meem engineering sib txawv, thiab lub capacitor snubber yuav tsum tau ua kom ob qho tib si zoo.
SMJ-P Hauv CRE's Broader Snubber Capacitor Range
LubSMJ-P lub thawv yasyog ib qho ntawm ntau cov teeb tsa ua los ntawm txhuas thiab cov ntaub ntawv uas CRE muab rau kev tiv thaiv IGBT thiab GTO snubber. Nyob ntawm qhov chaw teeb tsa, kev taw qhia ua los ntawm txhuas, thiab cov kev xav tau thermal, CRE kuj tsim cov axial-lead thiab Mylar-tape variants ua los ntawm tib lub tshuab polypropylene zaj duab xis metallized thiab tsim los rau tib cov qauv kev ua tau zoo ESR / ESL. Qhov no txhais tau tias pab pawg tsim qauv tuaj yeem txav mus los ntawm cov hom ntawv thaum qhov layout hloov zuj zus, yam tsis tau rov ua dua qhov kev ntsuas dielectric hauv qab los ntawm kos.
Yuav ua li cas Engineers Txheeb xyuas qhov kev xaiv Capacitor Snubber
Qhov capacitance thiab voltage rating ntawm daim datasheet tsis txaus los lees paub tias lub snubber capacitor yuav ua haujlwm hauv ib lub circuit. Txoj kev txheeb xyuas tus qauv, uas SEMIKRON tau sau tseg hauv nws cov ntawv sau IGBT, yog ntsuas qhov collector-emitter voltage waveform tiag tiag thaum kaw, nrog thiab tsis muaj snubber capacitor, thiab paub tseeb tias qhov siab tshaj plaws nyob hauv IGBT qhov rated blocking voltage hauv qab qhov xwm txheej phem tshaj plaws. Tom qab kaw, tam sim no hloov mus rau hauv snubber capacitor, tsim cov tam sim no siab tshaj plaws thaum lub sijhawm hloov pauv, ua raws li qhov damped oscillation ntawm snubber capacitor thiab DC-link, nrog rau qhov oscillation zaus teeb tsa los ntawm lub bus bar's parasitic inductance thiab snubber capacitor tus nqi.
Qhov kev hais txog tib yam no ntawm cov qauv hlau lead thiab cov khoom siv ncaj qha rau ntawm lub davhlau ya nyob twg ua qhov hloov pauv tseem ceeb, tsis yog kev xav tom qab, tau hais rov qab hauv cov ntaub ntawv tsim hluav taws xob fais fab uas tau muab faib dav dav, suav nrog Rudy Severns cov ntaub ntawv tsim qauv snubber uas Cornell Dubilier luam tawm. Lub hauv paus physics kuj tau ua raws li IEC 61071, tus qauv thoob ntiaj teb tswj hwm cov capacitors rau cov khoom siv hluav taws xob, uas SMJ-P tau tsim los ua kom tau raws li. Lub ntsiab lus thoob plaws txhua qhov chaw no yog sib xws:Lub hom phiaj tsis yog tsuas yog tus nqi capacitance ntawm daim ntawv spec xwb, nws yog qhov ntsuas, rov ua dua qhov txo qis ntawm qhov siab tshaj plaws ntawm lub zog thaum kaw.
Qhov twg SMJ-P Capacitors Tau Siv
Daim duab qhia txog lub voj voog IGBT ib nrab nrog lub capacitor snubber C3 txuas nrog hla cov tsheb npav DC.
Cov capacitors Snubber tsis yog ib qho khoom me me. Lawv tshwm sim txhua qhov chaw uas lub cuab yeej hloov hluav taws xob xav tau kev tiv thaiv los ntawm nws tus kheej qhov kev ua haujlwm hloov pauv:
• Cov inverters thiab cov motors, qhov twg IGBTs hloov pauv tas li thiab xav tau kev tiv thaiv dv / dt tas li
•Cov khoom siv hluav taws xob ntawm lub tsheb fais fab, qhov twg kev hloov pauv ua haujlwm tau zoo thiab lub neej ntev ntawm cov khoom cuam tshuam ncaj qha rau ntau yam thiab kev ntseeg tau
•Cov txheej txheem hluav taws xob rov ua dua tshiab, suav nrog cov inverters hnub ci, qhov twg kev tswj hwm voltage spike tiv thaiv cov khoom siv hloov pauv hluav taws xob siab dhau ntau xyoo ntawm kev ua haujlwm
•Cov khoom siv hluav taws xob,Cov Chaw Pabcuam Hauv Zej Zog (SVCs), thiab cov khoom siv hluav taws xob ntawm lub tsheb ciav hlau, qhov twg cov hluav taws xob siab thiab cov voj voog ua haujlwm hnyav ua rau ESR thiab ESL kev ua tau zoo tshwj xeeb tshaj yog qhov tseem ceeb
Cov xov sib xws thoob plaws txhua daim ntawv thov no yog tib yam: cov khoom siv hloov pauv tsim cov transients, thiab qee yam yuav tsum nqus lawv kom huv si, voj voog tom qab voj voog, rau lub neej ntawm lub system.
Vim Li Cas Cov Khoom Siv Thiab Kev Xaiv Tsim Khoom Sib Xyaws Dhau Lub Sijhawm
Lub snubber capacitor txoj haujlwm zoo li yooj yim ntawm daim ntawv teev cov ntaub ntawv. Hauv kev xyaum, kev ua tau zoo yog txiav txim siab los ntawm cov ntsiab lus uas tsis tshwm sim kom txog thaum lub kaw lus tau khiav ntau xyoo: seb lub dielectric nws tus kheej kho li cas tom qab kev ntxhov siab, ESR thiab ESL nruj npaum li cas raug tswj hwm thoob plaws hauv cov khoom tsim tawm, thiab seb qhov kev tiv thaiv rwb thaiv tsev puas tuav tau thoob plaws qhov kub thiab txias tag nrho es tsis yog tsuas yog nyob rau hauv chav tsev kub.
Qhov no yog vim li cas CRE's SMJ-P khi nws lub neej ntev txog 100,000 teev rau qhov kub thiab txias tshwj xeeb (≤85 ° C), es tsis txhob hais tias nws yog tus lej dav dav, thiab vim li cas kev tiv thaiv rwb thaiv tsev thiaj li tau teev tseg cais los ntawm qhov ntau thiab tsawg ntawm lub peev xwm es tsis yog ib daim duab pam. Cov no yog cov yam ntxwv uas tseem ceeb rau tus kws ua vaj tse uas lees paub qhov kev tsim qauv, tsis yog tsuas yog kev thov lag luam xwb.
Cov Lus Nug Feem Ntau: Kev Xaiv Capacitor IGBT Snubber
Q1：Ib qho yog dab tsiIGBT capacitorssiv rau?
Ib lub IGBT snubber capacitor tswj cov voltage spikes tsim thaum IGBT kaw, tiv thaiv lub cuab yeej los ntawm kev tshaj nws qhov rated blocking voltage. CRE's SMJ-P metallized polypropylene film capacitor yog tsim los rau lub hom phiaj no, nrog rau qhov ntsuas voltage ntawm 700V DC txog 3000V DC.
Q2：Kuv yuav xaiv lub chaw tsim khoom siv capacitor snubber li cas?
Nrhiav ib lub chaw tsim khoom uas muaj cov capacitors zaj duab xis qis-ESR/ESL, cov ntawv pov thawj lees paub (IEC 61071, UL94V-0), thiab cov kev xaiv capacitance lossis voltage.CREyog lub chaw tsim khoom capacitor zaj duab xis uas muab DC-Link,IGBT snubber, thiab EMC-filter capacitors rau cov khoom siv hluav taws xob, lub zog rov ua dua tshiab, thiab kev siv tsheb ciav hlau, nrog rau ob qho tib si axial thiab radial lead configurations muaj.
Q3：Dab tsi ua rau polypropylene zaj duab xis capacitor zoo dua li lwm hom snubber capacitor?
Cov yeeb yaj kiab polypropylene metallized muaj ESR / ESL qis, cov khoom dielectric kho tus kheej, thiab kev ua haujlwm ruaj khov dhau ntawm qhov kub thiab txias dav, ua rau nws yog tus qauv dielectric rau cov ntawv thov snubber piv rau electrolytic lossis ceramic lwm txoj hauv kev. CRE's SMJ-P ua haujlwm ntawm -40 ° C txog + 85 ° C nrog lub neej ntev txog 100,000 teev.
Cov ntaub ntawv qhia txog kev siv SMJ-P muaj nyob ntawm no: https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html
Cov ntaub ntawv siv los ua piv txwv:
1. CRE ZOG TSHIAB, “Lub thawv yas IGBT Snubber Capacitor SMJ-P, ”Daim Ntawv Qhia Txog Khoom. （https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html）
2. Semikron Danfoss, “IGBT Peak Voltage Measurement and Snubber Capacitor Specification,” Daim Ntawv Thov AN 07-006.
（https://assets.danfoss.com/documents/latest/444044/AB501644922487en-000201.pdf）
3. Severns, Rudy. "Tsim Snubbers rau Fais Fab Circuits." Daim Ntawv Thov Cornell Dubilier. （https://www.cde.com/resources/technical-papers/design.pdf）
Cov lus qhia txog kev siv tshuab qhia txog cov ntaub ntawv luam tawm thaum lub sijhawm sau ntawv. Cov nyeem ntawv yuav tsum paub meej tias cov qhab nia tam sim no piv rau daim ntawv teev cov ntaub ntawv tshiab tshaj plaws ntawm lub chaw tsim khoom ua ntej siv qhov kev tsim kawg.
Lub sijhawm tshaj tawm: Lub Xya Hli-03-2026