Ibibera muri Microsecond IGBT irazimye

Igihe cyoseIGBTbirazimira, habaye ikintu cy’urugomo mu gihe gito cyane.

Igereranya ry'ingufu z'amashanyarazi rigaragaza ubwiyongere bwa IGBT bwo kuzimya umuriro hamwe na capacitor ya CRE snubber cyangwa idafite

Umuriro unyura muri icyo gikoresho urahagarara. Ingufu zibikwa mu muyoboro w’amashanyarazi ntaho zijya. Zirekurwa nk'umuvuduko w'amashanyarazi. Iyo nta kintu kiyinjiza, ishobora kurenza umuvuduko w'amashanyarazi wa IGBT maze ikangiza igikoresho.

Iki ni cyo kibazo nyacyo capacitor ya snubber yashyiriweho gukemura. Kandi birakwiye gusobanuka neza, kuko itandukaniro riri hagati ya capacitor nziza ya snubber n'iciriritse rigaragara nk'aho igikoresho cyananiwe amezi cyangwa imyaka nyuma y'umurongo, atari ku munsi wa mbere.

Akazi k'umukozi wo gukata icyuma gishyuha cyane (Snubber Capacitor)

A capacitor y'icyuma gishyushyayicaye iruhande rw'igikoresho cyo guhinduranya kandi gitanga ingufu zarekuwe ahantu hatekanye ho kujya.

Iyo IGBT izimye, capacitor ifata umuyoboro w’amashanyarazi udahinduka kandi ikagabanya umuvuduko w’amashanyarazi (dv/dt) mu gikoresho. Uwo murimo umwe ukora ibintu bitatu icyarimwe: ugabanya ubwiyongere bw’amashanyarazi, ugabanya igihombo cyo guhinduranya, kandi ugatuma umuyoboro w’amashanyarazi n’impinduka z’amashanyarazi bibangamira igice gisigaye cy’uruziga.

Kugira ngo ibi bikore neza, imiterere ibiri y'amashanyarazi ni ingenzi kurusha ikindi kintu cyose: uburinzi buke bw'uruhererekane (ESR) n'ubudahangarwa buke bw'uruhererekane (ESL). Uburemere bwinshi bwa ESR cyangwa ESL bugabanya uburyo capacitor ikora kandi bukagabanya uburyo ishobora guhagarika ihindagurika ryihuse. Iyi niyo mpamvu filime ya polypropylene ya metallized ari yo ikoreshwa cyane mu bikorwa byinshi byo kutagira icyo ikora. Ihuza ESR/ESL nke na dielectric yivura ubwayo, bityo capacitor igakomeza gukora neza nubwo yahuye n'ihungabana ry'amashanyarazi rikabije.

Imbere muriSMJ-P: CRE's Plastike Box IGBT Snubber Capacitor

SMJ-P ya CRE ni capacitor ikoze mu gasanduku ka pulasitiki kandi yubatswe kugira ngo irinde IGBT, ifite imigozi y'umuringa ishyirwa mu cyuma kugira ngo yoroshye kuyishyira kuri module ya IGBT.

Agasanduku ka pulasitiki ka CRE SMJ-P IGBT gafite icyuma gikozwe mu muringa gitwikiriwe n'ibati

Ibipimo by'ingenzi bya tekiniki:

Inyubako ubwayo yubatswe hakurikijwe logique imwe n'imikorere y'amashanyarazi. Agasanduku ka pulasitiki gafunze na resin, karinda uruziga ku bushuhe n'imbaraga za mekanike. Imiterere y'urutare rwa axial na radial irahari, bityo umuryango umwe wa capacitor ushobora guhuza imiterere itandukanye ya modules nta gishushanyo mbonera cyihariye buri gihe.

Ibisobanuro Ingingo nyinshi zisimbuka: Igipimo cy'ubuhanga mu by'ijimeteri ni ingenzi kimwe n'ubushobozi

Inyinshicapacitor y'icyuma gishyushyaIbikubiye muri iyo porogaramu bigarukira kuri “koresha firime ya polypropylene, irakiza ubwayo.” Ibyo ni ukuri, ariko ni kimwe cya kabiri cy’inkuru y’ubuhanga, kandi ni kimwe cya kabiri kitagena niba igice runaka gikora mu buryo runaka.

Igice gisigaye ni umuyoboro wa loop inductance. Agaciro ka capacitance ntabwo gatanga icyizere cyo kwiyongera kwa voltage muke niba umuyoboro wa capacitor ukomeje kuba mwinshi, kuko umuyoboro usigaye mu muyoboro uri hagati y’imiyoboro n’imiyoboro y’imbere ari wo nyirabayazana wo gukora umuyoboro wa voltage cyangwa transient. Mu yandi magambo, igice gifite capacitance nyinshi gifite imiyoboro miremire kandi yoroheje gishobora gukora nabi igice gito gifite imiyoboro migufi kandi miremire.

Ishusho igereranya uburyo bwo gukwirakwiza umuyoboro hagati y'aho imiyoboro ya capacitor ikoresha amashanyarazi maremare n'aho ikoresha amashanyarazi ishyirwa mu buryo butaziguye

Iyi niyo mpamvu uburyo bwo gushyiraho bufite akamaro kurusha uko bugaragara ku rupapuro rw'amakuru. Capacitors zifite imiyoboro minini kandi irambuye ishobora gushyirwa kuri module ya IGBT zigira ubushobozi bwo kwiyinjiza mu buryo budahagije ugereranyije n'ibice bihujwe binyuze mu nsinga ndende z'icyuma. Imiyoboro ya SMJ-P ifite icyuma gitwikiriye icyuma gitwikiriye icyuma hamwe n'uburyo bwo guhitamo imiyoboro ya axial cyangwa radial ihari kubera iyi mpamvu: kugira ngo inzira yo guhuza igume ngufi kandi ureke ubushobozi buhanitse butange uburinzi bwa dv/dt bwagenwe.

Imiterere yo kwivura ubwayo iracyafite agaciro, ukwayo. Filimi ya polypropylene ikoze mu byuma ihura n’ihungabana rya dielectric mu masegonda make, aho gutsindwa burundu, niyo mpamvu filime ikomeza kuba dielectric isanzwe kuri iyi porogaramu kuruta ubundi buryo bwa ceramic cyangwa electrolytic. Ariko kwivura ubwayo no kugabanya umuvuduko w’amashanyarazi ni ibibazo bibiri bitandukanye by’ubuhanga, kandi capacitor idafite ingufu igomba kubikemura byombi neza.

SMJ-P iri mu cyiciro cya CRE cy'ubushobozi bwo gupima snubber

ItsindaImiterere y'agasanduku ka pulasitiki ka SMJ-Pni imwe mu miterere myinshi ya lead na case CRE itanga yo kurinda IGBT na GTO snubber. Bitewe n'umwanya wo gushyiraho, icyerekezo cy'lead, n'ibikenewe mu bushyuhe, CRE inakora ubwoko bwa axial-lead na Mylar-tape byubakiye ku ikoranabuhanga rimwe rya polypropylene ryakozwe mu byuma kandi rigahuzwa n'ibipimo bimwe bya ESR/ESL. Ibi bivuze ko itsinda ry'abashushanya rishobora kugenda hagati y'imiterere uko imiterere igenda ihinduka, ritabanje kwemeza sisitemu ya dielectric kuva ku ntangiriro.

Uburyo Injeniyeri zemeza amahitamo ya Snubber Capacitor

Ubushobozi n'isuzuma ry'amashanyarazi ku rupapuro rw'amakuru ntibihagije kugira ngo byemezwe ko capacitor y'amashanyarazi izakora mu buryo runaka. Uburyo busanzwe bwo kugenzura, bwanditswe na SEMIKRON mu nyandiko zayo za IGBT, ni ugupima imiterere nyayo y'amashanyarazi akoreshwa mu gukusanya no gutanga ingufu mu gihe cyo kuzimya, hamwe na capacitor y'amashanyarazi iriho cyangwa idafite, no kwemeza ko uburebure bw'amashanyarazi buguma muri voltage ya IGBT yo kuzimya mu bihe bibi cyane. Nyuma yo kuzimya, amashanyarazi ahinduka muri capacitor y'amashanyarazi, bigatuma uburebure bw'amashanyarazi buhinduka mu gihe cyo guhindura amashanyarazi, hagakurikiraho ubwiyongere bw'amashanyarazi hagati ya capacitor y'amashanyarazi na DC-link, hamwe n'umuvuduko w'ubwiyongere bushyirwaho n'ubwiyongere bw'amashanyarazi bwa parasitiki ya bus bar n'agaciro ka capacitor y'amashanyarazi.

Uku kwibanda ku ishusho y'icyuma gifata amashanyarazi n'ibikoresho bya terminal nk'impinduka y'ibanze mu gushushanya, aho kuba igitekerezo cya nyuma, bigaragazwa mu nyandiko zikwirakwizwa cyane mu gushushanya ibikoresho by'amashanyarazi, harimo n'inyandiko ya Rudy Severns yo gushushanya yasohotse na Cornell Dubilier. Ubuhanga bw'impinduka bushingiye kuri fiziki kandi bwemewe muri IEC 61071, capacitors mpuzamahanga zigenga ibikoresho by'amashanyarazi, SMJ-P yagenewe kuzuza. Ingingo iri muri izi nkomoko zose irahuye:Intego si agaciro k'ubushobozi gusa ku rupapuro rw'igenzura, ahubwo ni ukugabanya ingufu z'amashanyarazi mu buryo bushobora gupimwa kandi bushobora gusubirwamo iyo zizimye.

Aho Capacitors za SMJ-P zikoreshwa

Imbonerahamwe y'uruhererekane rwa IGBT rw'igice cy'ikiraro ifite capacitor ya snubber C3 ihujwe ku nzira za DC bus.

Capacitors zoroshye ntabwo ari igice cy'ingenzi. Zigaragara aho igikoresho gihindura amashanyarazi gikeneye kurindwa n'imikorere yacyo yo guhindura amashanyarazi:

• Inverters na moteri zitwaraaho IGBT zihinduranya buri gihe kandi zigakenera uburinzi buhoraho bwa dv/dt

•Ibyuma by'amashanyarazi bikoresha amashanyaraziaho imikorere myiza yo guhinduranya no kuramba kw'ibice bigira ingaruka ku buryo butaziguye ku rugero n'ubwizerwe

•Sisitemu z'ingufu zisubira, harimo n'ibyuma bihindura imirasire y'izuba, aho kugabanya imbaraga z'amashanyarazi birinda ibikoresho bihindura ingufu nyinshi mu myaka ibarirwa muri za mirongo imaze ikora

•Imashini zikosora ibintu,SVC, n'ibikoresho by'amashanyarazi bya gari ya moshiaho umuvuduko w'amaraso ukabije n'imikorere isaba imbaraga nyinshi bituma imikorere ya ESR na ESL iba ingenzi cyane.

Uburyo buhuriweho muri izi porogaramu zose ni bumwe: ibikoresho bihinduranya bitanga ibihe bidahinduka, kandi ikintu kigomba kubikurura neza, mu gihe cyose sisitemu izaba ikiriho.

Impamvu amahitamo y'ibikoresho n'inganda ahura n'igihe

Akazi k'umukoresha ukoresha icyuma gishyushya ibintu gasa n'aho koroshye ku rupapuro rw'amakuru. Mu by'ukuri, imikorere igenwa n'ibisobanuro bitagaragara kugeza igihe sisitemu imaze imyaka myinshi ikora: uburyo dielectric yivura burundu nyuma yo guhangayika, uburyo ESR na ESL bigenzurwa neza mu itsinda ry'umusaruro, ndetse niba ubushobozi bwo kwirinda gushyushya ibintu buguma mu bushyuhe bwose aho kuba mu bushyuhe bw'icyumba gusa.

Iyi ni yo mpamvu SMJ-P ya CRE ihuza igihe cyo kubaho amasaha 100.000 n'ubushyuhe bwihariye (≤85°C), aho kubivuga nk'umubare rusange, kandi impamvu ubushobozi bwo kwirinda gushyushya bugenwa ukwabwo hakurikijwe ubushobozi bw'ibikoresho aho kuba nk'umubare umwe. Ibi ni ubwoko bw'ibipimo bifitiye akamaro injeniyeri wemeza igishushanyo, atari gusa icyifuzo cyo kwamamaza.

Ibibazo Bikunze Kubazwa: Guhitamo Capacitor ya IGBT Snubber

Q1:Ni ikiCapacitor ya IGBT idafite ubushobozi bwo gupimabyakoreshejwe? 

Capacitor ya IGBT igabanya imbaraga z'amashanyarazi ziterwa n'ingufu z'amashanyarazi iyo IGBT izimye, ikarinda igikoresho kurenza ingufu z'amashanyarazi zisanzwe. Capacitor ya SMJ-P ya CRE ya polypropylene filme yakozwe mu byuma yakozwe muri iyi ntego, ifite ingufu z'amashanyarazi kuva kuri 700V DC kugeza kuri 3000V DC.

Q2:Nigute nahitamo uruganda rukora capacitor ikoresha snubber rukwiye? 

Shaka uruganda rutanga capacitors za filime zifite ESR/ESL nkeya, ibyemezo byemewe (IEC 61071, UL94V-0), hamwe n'uburyo bwihariye bwo gukoresha capacitance cyangwa voltage.CREni uruganda rukora capacitor ya filime rutanga DC-Link,IGBT yinuba, na capacitors za EMC-filter zikoreshwa mu by'ikoranabuhanga, ingufu zishobora kuvugururwa, n'uburyo bwo gutwara abantu muri gari ya moshi, hamwe n'imiterere y'urutare rw'agati n'urutare rw'agati buriho.

Q3:Ni iki gituma capacitor ya filime ya polypropylene iba nziza kurusha izindi capacitor zidafite ubushobozi bwo gupima? 

Filimi ya polypropylene ikoze mu byuma itanga ESR/ESL nkeya, ubushobozi bwo kwivura bwa dielectric, hamwe n'imikorere ihamye mu bushyuhe bwinshi, bigatuma iba dielectric isanzwe ikoreshwa mu gukoresha snubber ugereranije n'izindi electrolytic cyangwa ceramic. SMJ-P ya CRE ikora kuva kuri -40°C kugeza kuri +85°C ifite igihe cyo kubaho cy'amasaha 100.000.

Inyandiko zuzuye za tekiniki za SMJ-P ziraboneka hano: https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html

Amareferensi:

1. IMPAMVU NSHYA ZA CRE, “Agasanduku ka Plastike IGBT Snubber Capacitor SMJ-P,” Urupapuro rw'amakuru y'ibicuruzwa. （https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html）

2. Semikron Danfoss, “IGBT Peak Voltage Gupima na Snubber Capacitor Ibisobanuro, “Inyandiko yo Gukoresha AN 07-006.

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

3. Severns, Rudy. “Igishushanyo cya Snubbers ku miyoboro y’amashanyarazi.” Icyitonderwa cyo gusaba cya Cornell Dubilier. （https://www.cde.com/resources/technical-papers/design.pdf）

Ibisobanuro bya tekiniki bigaragaza amakuru yasohotse mu gihe cyo kwandika. Abasomyi bagomba kwemeza amanota agezweho ugereranije n'urupapuro rw'amakuru ruheruka rw'uwakoze mbere yo gukoresha igishushanyo mbonera cya nyuma.