Ihe Na-eme na Microsekọnd Mgbe IGBT Gbanyụrụ

Oge ọ bụla aIGBTgbanyụọ, ihe ike na-eme n'ime obere oge.

Ntụnyere ebili mmiri voltaji na-egosi mmụba mwepụ IGBT nwere na enweghị capacitor CRE snubber

Ọkụ eletrik nke na-agafe na ngwaọrụ ahụ na-akwụsị. Ike echekwara na inductance nke sekit ahụ enweghị ebe ọ ga-aga. Ọ na-apụta dị ka voltaji spike. Ọ bụrụ na ọ dịghị ihe na-amịkọrọ spike ahụ, ọ nwere ike ịgafe voltaji IGBT nyere ma mebie ngwaọrụ ahụ.

Nke a bụ kpọmkwem nsogbu e ji snubber capacitor dozie. Ọ dịkwa mkpa ịghọta nke ọma, n'ihi na ọdịiche dị n'etiti ezigbo snubber capacitor na nke na-adịghị mma na-apụta mgbe ngwaọrụ ahụ dara ọnwa ma ọ bụ afọ ole na ole ka ọ na-ada, ọ bụghị n'ụbọchị mbụ.

Ọrụ nke onye na-eme ka ihe dị n'ime ya sie ike

A capacitor snubberna-anọdụ n'elu ngwaọrụ mgbanwe ahụ ma na-enye ike ahụ ewepụtara ebe dị mma ịga.

Mgbe IGBT gbanyụrụ, capacitor ahụ na-amịkọrọ ike eletrik na-agafe agafe ma na-ebelata ọsọ voltaji (dv/dt) n'ofe ngwaọrụ ahụ. Ọrụ otu ahụ na-eme ihe atọ n'otu oge: ọ na-egbochi mmụba voltaji, ọ na-ebelata mfu mgbanwe, ọ na-emekwa ka mgbanwe ọkụ eletrik na voltaji dị nro nke na-eme ka sekit ndị ọzọ sie ike.

Ka nke a wee rụọ ọrụ nke ọma, ihe abụọ dị mkpa karịa ihe ọ bụla ọzọ: obere nguzogide usoro nhata (ESR) na obere nguzozi usoro nhata (ESL). ESR ma ọ bụ ESL dị elu na-ebelata nzaghachi capacitor ma na-ebelata otú o si ejide obere oge ngwa ngwa. Nke a bụkwa ihe mere ihe nkiri polypropylene ejiri metallized ji bụrụ ihe a na-ahọrọ maka ọtụtụ ngwa snubber. Ọ na-ejikọta obere ESR/ESL na dielectric na-agwọ onwe ya, yabụ capacitor na-arụ ọrụ nke ọma ọbụlagodi mgbe nrụgide voltaji ugboro ugboro gasịrị.

N'imeSMJ-P: Igwe ihe mkpuchi IGBT nke CRE's Plastic Box

SMJ-P nke CRE bụ ihe nchekwa plastic nke e ji ígwè rụọ maka nchekwa IGBT, ya na ihe ntinye ọla kọpa e ji tin kpuchie maka ntinye ngwa ngwa ozugbo na modulu IGBT.

Igbe plastik CRE SMJ-P IGBT snubber capacitor nwere ọla kọpa a kpụchara akpụcha nke nwere tin plated

Isi ihe dị mkpa gbasara teknụzụ:

A na-ewu ihe owuwu ahụ n'onwe ya gburugburu otu usoro ahụ dị ka arụmọrụ eletriki. E ji resin mechie akpa plastik ahụ, nke na-echebe ihe mgbochi mmiri site na mmiri na nrụgide igwe. Ma nhazi axial na radial lead dị, yabụ otu ezinụlọ capacitor nwere ike itinye nhazi modulu dị iche iche na-enweghị nhazi omenala oge ọ bụla.

Nkọwa Ihe Ọtụtụ Isiokwu Ga-eme: Jiometrị Lead dị Mkpa Dị Ka Ike

Ọtụtụcapacitor snubberỌdịnaya na-akwụsị na "jiri ihe nkiri polypropylene, ọ na-agwọ onwe ya." Nke ahụ bụ eziokwu, mana ọ bụ naanị ọkara akụkọ injinia, ọ bụkwa ọkara nke na-anaghị ekpebi ma akụkụ enyere ọ ga-arụ ọrụ na sekit enyere.

Ọkara nke ọzọ bụ inductance loop. Uru capacitance naanị anaghị ekwe nkwa mmụba voltaji dị ala ma ọ bụrụ na inductance onwe capacitor ka dị elu, n'ihi na inductance fọdụrụ na loop dị n'etiti njedebe na njikọ dị n'ime bụ ọrụ ya imepụta spike voltaji ma ọ bụ transient. N'ikwu ya n'ụzọ ọzọ, akụkụ capacitance dị elu nwere ndu dị ogologo, dị gịrịgịrị nwere ike ịrụ ọrụ nke ọma karịa akụkụ pere mpe nwere njedebe dị mkpụmkpụ, sara mbara.

Eserese na-atụnyere inductance loop n'etiti ọdụ capacitor snubber kwụ ọtọ na nke na-etinye aka kpọmkwem

Nke a bụkwa ihe mere usoro itinye ihe ji dị mkpa karịa ka ọ dị na mpempe akwụkwọ data. Capacitors nwere ọdụ dị larịị nke enwere ike ịpịnye ozugbo na modulu IGBT na-enweta obere inductance onwe ya karịa akụkụ ejikọtara site na waya ndu ogologo. SMJ-P's tin-plated copper insert leads na nhọrọ nke nhazi axial ma ọ bụ radial dị maka kpọmkwem ihe kpatara ya: iji mee ka ụzọ njikọ dị mkpụmkpụ ma kwe ka capacitance enyere ọkwa nye nchedo dv/dt akọwapụtara ya.

Ihe na-agwọ onwe ya ka dị mkpa, iche iche. Ihe nkiri polypropylene e ji ígwè rụọ nke na-enwe mmebi dielectric mpaghara na-ewepụ nsogbu ahụ na microsekọnd, kama ịda ada kpamkpam, ọ bụ ya mere ihe nkiri ahụ ji bụrụ dielectric ọkọlọtọ maka ojiji a karịa ihe ndị ọzọ e ji eme seramiiki ma ọ bụ electrolytic. Mana ọgwụgwọ onwe onye na obere loop inductance bụ nsogbu injinia abụọ dị iche iche, ihe nchekwa snubber ga-enwerịrị ha abụọ nke ọma.

SMJ-P N'ime oke ike Snubber sara mbara nke CRE

IheỤdị igbe plastik SMJ-Pbụ otu n'ime ọtụtụ nhazi lead na case CRE na-enye maka nchekwa IGBT na GTO snubber. Dabere na oghere nrụnye, nhazi lead, na ihe achọrọ maka okpomọkụ, CRE na-emepụta ụdị axial-lead na Mylar-tape nke e wuru na otu teknụzụ ihe nkiri polypropylene metallized ma mepụta ya na otu ọkọlọtọ arụmọrụ ESR/ESL. Nke a pụtara na otu ndị na-emepụta ihe nwere ike ịkwaga n'etiti usoro ka nhazi ahụ na-agbanwe, na-enweghị ịgbanwe usoro dielectric dị n'okpuru site na ọkọ.

Otu Ndị Injinia Si Achọpụta Nhọrọ Onye Na-enye Ike Snubber

Ike na ọkwa voltaji na mpempe akwụkwọ data ezughị iji gosi na capacitor snubber ga-arụ ọrụ na sekit enyere. Usoro nkwenye ọkọlọtọ, nke SEMIKRON dekọrọ na ndetu ngwa IGBT ya, bụ ịtụ ụdị ebili mmiri voltaji onye na-anakọta ihe na-ewepụta ihe n'oge a na-agbanyụ ọkụ, yana capacitor snubber n'ọnọdụ ya, ma gosi na oke ahụ na-anọgide n'ime voltaji mgbochi IGBT n'okpuru ọnọdụ kacha njọ. Mgbe agbanyụrụ, ugbu a na-abanye na capacitor snubber, na-emepụta oke ugbu a na ozugbo mgbanwe, wee soro oscillation dị nro n'etiti capacitor snubber na njikọ DC, yana ugboro oscillation nke edobere site na inductance parasitic nke bab bọs na uru capacitor snubber.

Otu ihe a na-ekwu maka geometry ndu na ngwaike ọdụ kwụ ọtọ dịka ihe dị mkpa maka imewe mbụ, kama iche echiche mgbe e mesịrị, ka a na-ekwu maka ya n'akwụkwọ nhazi eletrọniki ike a na-ekesa nke ukwuu, gụnyere ntụaka nhazi snubber nke Rudy Severns bipụtara nke Cornell Dubilier bipụtara. E mekwara ka physics dị n'okpuru bụrụ nke a na-ahụ anya na IEC 61071, ọkọlọtọ mba ụwa na-achịkwa capacitors maka eletrọniki ike, nke SMJ-P mere ka ọ zute. Isi ihe dị na isi mmalite ndị a niile bụ otu:Ebumnuche abụghị naanị uru ikike dị na mpempe akwụkwọ nkọwapụta, ọ bụ mbelata a tụrụ, nke a na-emegharị ugboro ugboro na voltaji kachasị elu mgbe a gbanyụrụ ya.

Ebe A Na-eji SMJ-P Capacitors

Eserese sekit IGBT nke ọkara-akwa nwere snubber capacitor C3 ejikọtara n'ofe okporo ụzọ bọs DC.

Kapasitọ Snubber abụghị ihe dị mkpa. Ha na-apụta ebe ọ bụla ngwaọrụ mgbanwe ike chọrọ nchebe pụọ na ọrụ mgbanwe nke ya:

• Inverters na draịva motoebe IGBTs na-agbanwe agbanwe mgbe niile ma chọọ nchedo dv/dt mgbe niile

•Ngwa eletrọniki ọkụ eletrik nke ụgbọala, ebe arụmọrụ mgbanwe na ogologo oge nke ihe mejupụtara na-emetụta oke na ntụkwasị obi ozugbo

•Sistemụ ike mmeghari ohuru, gụnyere inverters anyanwụ, ebe mgbochi mmụba voltaji na-echebe ngwaọrụ mgbanwe ike dị elu ruo ọtụtụ iri afọ nke ọrụ

•Ndị na-edozi ihe,Ndị SVCna ihe ndị na-enye ike ụgbọ alaebe oke ọkụ ọkụ na okirikiri ọrụ siri ike na-eme ka arụmọrụ ESR na ESL dị oke mkpa

Ihe a na-ahụkarị n'ime ngwa ndị a niile bụ otu ihe ahụ: ngwaọrụ mgbanwe na-emepụta ihe ndị na-agbanwe agbanwe, ihe ga-amịkọrọ ha nke ọma, na-agbagharị mgbe usoro gasịrị, ruo ndụ niile nke sistemụ ahụ.

Ihe Mere Nhọrọ Ihe na Mmepụta Ji Atụkọta Ka Oge Na-aga

Ọrụ nke snubber capacitor dị mfe na mpempe akwụkwọ data. N'ọrụ, a na-ekpebi arụmọrụ site na nkọwa ndị na-apụtaghị ruo mgbe sistemụ ahụ na-arụ ọrụ ruo ọtụtụ afọ: otú dielectric si agwọ onwe ya mgbe nrụgide gasịrị, otú ESR na ESL si achịkwa nke ọma n'ofe otu mmepụta, na ma iguzogide mkpuchi ahụ na-adịgide n'ofe oke okpomọkụ zuru oke kama naanị na okpomọkụ ụlọ.

Ọ bụ ya mere SMJ-P nke CRE ji jikọta ọkwa ndụ awa 100,000 ya na ọnọdụ okpomọkụ ebe okpomọkụ dị (≤85°C), kama ịkọwa ya dị ka ọnụọgụgụ nkịtị, na ihe kpatara e ji akọwapụta iguzogide mkpuchi iche iche site na oke ike kama ịbụ otu ihe mkpuchi. Ndị a bụ ụdị nkọwapụta dị mkpa nye onye injinia na-akwado imewe, ọ bụghị naanị nkwupụta ahịa.

Ajụjụ: Nhọrọ Capacitor IGBT Snubber

Q1:Gịnị bụ aKapasitọ IGBT snubbereji maka? 

Igwe IGBT snubber capacitor na-egbochi mmụba voltaji e mepụtara mgbe IGBT gbanyụrụ, na-echebe ngwaọrụ ahụ ka ọ ghara ịgafe voltaji mgbochi ya. Ejiri igwe SMJ-P metallized polypropylene film capacitor nke CRE mepụta ya maka ebumnuche a, yana oke voltaji 700V DC ruo 3000V DC.

Q2:Kedu otu m ga-esi họrọ onye nrụpụta capacitor snubber kwesịrị ekwesị? 

Chọọ onye nrụpụta nke na-enye obere ihe mkpuchi ihe nkiri ESR/ESL, asambodo a ma ama (IEC 61071, UL94V-0), yana nhọrọ ikike ma ọ bụ voltaji ahaziri ahazi.CREbụ ụlọ ọrụ mmepụta ihe nkiri na-enye DC-Link,IGBT snubber, na ihe nzacha EMC maka ngwa eletrọniki ike, ike mmeghari ohuru, na ngwa njem ụgbọ okporo ígwè, yana nhazi ndu axial na radial dị.

Q3:Gịnị na-eme ka polypropylene film capacitor ka mma karịa ụdị snubber capacitor ndị ọzọ? 

Ihe nkiri polypropylene e ji ígwè rụọ na-enye obere ESR/ESL, ihe ndị na-agwọ onwe ha, na arụmọrụ kwụsiri ike n'ọtụtụ okpomọkụ, na-eme ka ọ bụrụ dielectric ọkọlọtọ maka ojiji snubber ma e jiri ya tụnyere ihe ndị ọzọ na-agbanwe agbanwe dịka electrolytic ma ọ bụ seramiiki. SMJ-P nke CRE na-arụ ọrụ site na -40°C ruo +85°C yana ndụ awa 100,000.

Akwụkwọ teknụzụ zuru oke maka SMJ-P dị ebe a: https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html

Ntụaka:

1. Ike ọhụrụ CRE, "Igbe Plastic IGBT Snubber Capacitor SMJ-P"Akwụkwọ data ngwaahịa." （https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html)

2. Semikron Danfoss, "Nhazi Voltaji Elu nke IGBT na Nkọwapụta Capacitor Snubber," Ihe Ndetu Ngwa AN 07-006.

（https://assets.danfoss.com/documents/latest/444044/AB501644922487en-000201.pdf)

3. Severns, Rudy. “Nhazi nke Snubbers maka Circuit Ike.” Ihe Ndekọ Ngwa Cornell Dubilier. （https://www.cde.com/resources/technical-papers/design.pdf）

Nkọwapụta teknụzụ na-egosipụta data ebipụtara n'oge e dere ya. Ndị na-agụ akwụkwọ kwesịrị ịkwado ọkwa dị ugbu a site na mpempe akwụkwọ data kachasị ọhụrụ nke onye nrụpụta tupu ejiri ya mee ihe nhazi ikpeazụ.