Ngā mea ka tupu i te maikorohekona ina whakaweto te IGBT

I ia wāIGBTka whakaweto, ka puta he mea tutu i roto i te wā poto rawa.

Te whakataurite i te āhua ngaru hiko e whakaatu ana i te pikinga whakaweto IGBT me te pūnga CRE snubber me te kore

Ka motuhia te ia e rere ana i roto i te taputapu. Kāore he wāhi e haere ai te pūngao e rongoa ana i roto i te inductance hē o te ara iahiko. Ka tukuna hei pikinga ngaohiko. Ki te kore tetahi mea e mimiti i taua pikinga, ka taea te neke atu i te ngaohiko kua whakatauria o te IGBT ka pakaru te taputapu.

Koinei tonu te raruraru i hangaia ai te pūnga snubber hei whakaoti. Ā, he mea tika kia mārama pai, nā te mea ko te rerekētanga i waenga i te pūnga snubber pai me te mea noa ka puta mai i te pakaru o te taputapu i roto i ngā marama, i ngā tau rānei i muri mai, ehara i te rā tuatahi.

Te Mahi a te Pūnga Snubber

A pūnga hiko snubbere noho ana i runga i te pūrere whakawhiti, ka hoatu taua pūngao i tukuna ki tētahi wāhi haumaru hei haere.

Ina whakawetohia te IGBT, ka mimiti te pūnga hiko i te iahiko whakawhiti, ā, ka whakawhāiti i te tere o te pikinga o te ngaohiko (dv/dt) puta noa i te taputapu. E toru ngā mahi a taua mahi kotahi i te wā kotahi: ka pehi i ngā pikinga ngaohiko, ka whakaiti i ngā ngaronga whakawhiti, ā, ka whakangawari i te iahiko ohorere me ngā huringa ngaohiko e whakararuraru ana i te toenga o te ara iahiko.

Kia pai ai te mahi a tēnei, e rua ngā āhuatanga hiko e nui ake ana te hiranga i tētahi atu mea: te ātete raupapa ōrite iti (ESR) me te inductance raupapa ōrite iti (ESL). Ka whakaroa te ESR teitei, te ESL rānei, i te urupare a te pūnga, ā, ka whakawhāiti i te whai huatanga o tana pupuri i tētahi whakawhiti tere. Koinei anō te take he mea whiriwhiri te kiriata polypropylene whakarewa mō te nuinga o ngā tono snubber. Ka whakakotahi i te ESR/ESL iti me te dielectric whakaora-ake, kia mau tonu ai te mahi pono o te pūnga ahakoa te ahotea ngaohiko maha.

I roto i teSMJ-PPouaka Kirihou a CRE IGBT Snubber Capacitor

Ko te SMJ-P a CRE he pūnga hiko pouaka kirihou i hangaia mō te tiaki i te IGBT, me ngā taura whakauru parahi whakakikoruatia ki te tine hei whakauru māmā ki runga i te waeine IGBT.

Pouaka kirihou CRE SMJ-P IGBT snubber capacitor me ngā taura parahi whakakikoruatia ki te tine

Ngā tawhā hangarau matua:

Ko te hanganga tonu he mea hanga i runga i te ariā kotahi me te mahi hiko. Kua hiritia te pouaka kirihou ki te kapia, hei tiaki i te takai mai i te makuku me te ahotea miihini. E wātea ana ngā whirihoranga arai tuaka me te arai radial, nō reira ka taea e te whānau pūnga kotahi te uru ki ngā tahora kōwae rerekē me te kore e hiahiatia he hoahoa ritenga i ia wā.

He Taipitopito e Pekehia ana e te nuinga o ngā tuhinga: He rite te hiranga o te āhuahanga arataki ki te kaha

Te nuingapūnga hiko snubberKa mutu te kōrero i te "whakamahia he kiriata polypropylene, ka ora anō ia." He pono tēnā, engari ko te haurua noa iho tēnei o te kōrero hangarau, ā, ko te haurua kāore e whakatau ana mēnā ka mahi tētahi wāhanga i roto i tētahi ara iahiko.

Ko tētahi atu haurua ko te ine hiko o te koropiko. Kāore te uara capacitance anake e kī taurangi he pikinga ngaohiko iti mena ka noho teitei tonu te ine hiko-ā-roto o te capacitance, nā te mea ko te ine hiko e toe ana i roto i te koropiko i waenga i ngā pito me ngā hononga ā-roto te take o te whakaputa i te pikinga ngaohiko, i te whakawhiti rānei. Arā, ko te wāhanga capacitance teitei me ngā taura roa, angiangi ka taea te ngoikore i te wāhanga iti me ngā pito poto, whānui.

He hoahoa e whakataurite ana i te ine i te hiko i waenga i ngā pito pūnga snubber roa-ara me ngā pito pūnga snubber e mau tika ana

Koinei anō te take he nui ake te hiranga o te tikanga whakairi i te mea e kitea ana i roto i te pepa raraunga. Ko ngā pūnga hiko he whānui, he papatahi ngā pito ka taea te whakawiri tika ki te waeine IGBT ka iti ake te hiko-whaiaro i ngā wāhanga e honoa ana mā roto i ngā waea ara roa. Ko ngā ara whakauru parahi whakakikoruatia ki te tine a SMJ-P me te kōwhiringa o te whirihoranga axial, radial rānei, kei reira mō tēnei take tonu: kia poto te ara hononga, kia tukuna hoki e te pūnga hiko kua whakatauria te tiaki dv/dt kua tohua mōna.

He mea nui tonu te āhuatanga whakaora-ā-ia anō, i tētahi atu taha. Mā te kiriata polypropylene whakarewa e pāngia ana e te pakarutanga o te dielectric ā-rohe ka wehea taua hapa i roto i ngā maikorohekona, kaua e hinga rawa, koia te take e noho tonu ai te kiriata hei dielectric paerewa mō tēnei tono i runga ake i ngā momo uku, hiko rānei. Engari he rerekē ngā raruraru hangarau e rua o te whakaora-ā-ia anō me te inductance porowhita iti, ā, me tika te mahi a te capacitor snubber.

SMJ-P i roto i te whānuitanga whānui o te pūnga Snubber a CRE

TeHōputu pouaka kirihou SMJ-PKo tētahi o ngā whirihoranga mata me te pouaka maha e tukuna ana e CRE mō te tiaki i te IGBT me te GTO snubber. I runga i te wāhi whakairi, te aronga mata, me ngā whakaritenga wera, ka whakaputa hoki a CRE i ngā momo mata-tuaka me ngā momo rīpene Mylar i hangaia i runga i te hangarau kiriata polypropylene whakarewa kotahi, ā, i hangaia ki ngā paerewa mahi ESR/ESL kotahi. Ko te tikanga ka taea e te tīma hoahoa te neke i waenga i ngā whakatakotoranga i te whanaketanga o te tahora, me te kore e whakahou i te pūnaha dielectric kei raro mai i te tīmatanga.

Me pēhea te whakamana a ngā Kaihangarau i te Kōwhiringa Pūnga Snubber

Kāore e ranea te kaha me te whakatauranga ngaohiko i runga i te pepa raraunga hei whakaū i te mahi a te pūnga hiko snubber i roto i tētahi ara iahiko kua whakaritea. Ko te tikanga manatoko paerewa, i tuhia e SEMIKRON i roto i ana tuhipoka tono IGBT, ko te ine i te āhua ngaru ngaohiko kaikohi-kaituku tuturu i te wā e whakawetohia ana, me te kore rānei o te pūnga hiko snubber i te wāhi, me te whakaū kei roto tonu te tihi i roto i te ngaohiko aukati kua whakatauria o te IGBT i raro i ngā āhuatanga kino rawa atu. Whai muri i te whakaweto, ka huri te iahiko ki roto i te pūnga hiko snubber, ka puta he tihi iahiko i te wā whakawhiti, ā, ka whai ake ko te oscillation kua whakawhāitihia i waenga i te pūnga hiko snubber me te hononga-DC, me te auau oscillation kua whakatakotoria e te inductance parasitic o te pae pahi me te uara o te pūnga hiko snubber.

Ko te aro nui ki te āhua o te arataki me te taputapu pūmau tika hei taurangi hoahoa matua, kaua hei whakaaro i muri mai, e whakaatahia ana i roto i ngā tuhinga hoahoa hikohiko mana e horapa whānuitia ana, tae atu ki te tohutoro hoahoa snubber a Rudy Severns i whakaputaina e Cornell Dubilier. Ko te ahupūngao matua kua whakapūmautia hoki i roto i te IEC 61071, te paerewa ā-ao e whakahaere ana i ngā pūnga hikohiko mana, e hangaia ana a SMJ-P kia tutuki. He rite tonu te kaupapa puta noa i ēnei puna katoa:ehara te whāinga i te uara kaha anake i runga i tētahi pepa whakaritenga, engari he whakahekenga ine, ka taea te whakahoki i te ngaohiko tihi i te wā e whakawetohia ana.

Ngā Wāhi e Whakamahia ai ngā Pūnga SMJ-P

He hoahoa ara iahiko IGBT haurua-piriti me te pūnga snubber C3 e hono ana puta noa i ngā reri pahi DC.

Ehara ngā pūnga hiko Snubber i te wāhanga motuhake. Ka puta mai i ngā wāhi katoa e hiahia ana te taputapu whakawhiti hiko kia tiakina mai i tana ake mahi whakawhiti:

• Ngā kaitahuri me ngā puku motuka, ina huri haere tonu ngā IGBT, ā, me tiaki tonu i te dv/dt

•Ngā hikohiko hiko o ngā waka hiko, ko te whai huatanga o te whakawhiti me te roa o te wā e pā tika ana ki te whānuitanga me te pono

•Ngā pūnaha pūngao whakahou, tae atu ki ngā pūwhakawhiti hiko o te rā, e tiaki ana te pehitanga o te ngaohiko i ngā taputapu whakawhiti mana-teitei mō ngā tekau tau o te mahi

•Ngā Whakatikatika,Ngā SVC, me ngā pūhiko o ngā waka tereina, i te wā e tino hira ai te mahi a te ESR me te ESL nā te nui o ngā iahiko pāorooro me ngā huringa mahi uaua

He rite tonu te kaupapa matua o ēnei tono katoa: ka whakaputahia e ngā taputapu whakawhiti ngā whakawhiti, ā, me mimiti marietia aua whakawhiti, i muri i te huringa, mō te roanga o te oranga o te pūnaha.

He aha i nui haere ai ngā kōwhiringa rauemi me ngā kōwhiringa hanga i roto i te wā

He māmā noa iho te āhua o te mahi a te pūnga snubber i runga i te pepa raraunga. I roto i te mahi, ka whakatauhia te mahi e ngā taipitopito kāore e puta mai kia roa rā anō te pūnaha e whakahaere ana: te auau o te whakaora-ā-roto o te dielectric i muri i te ahotea, te kaha o te whakahaere i te ESR me te ESL puta noa i te puranga whakaputa, me te pumau o te ātete whakamarumaru puta noa i te awhe pāmahana katoa, kaua i te pāmahana rūma anake.

Koia te take e hono ai te SMJ-P a CRE i tana whakatauranga roa o te ora 100,000-haora ki tētahi āhua pāmahana wera motuhake (≤85°C), kaua e kīia he tau whānui, ā, he aha hoki i tohua motuhaketia ai te ātete whakamahana mā te awhe kaha kaua hei tau kotahi. Koinei ngā momo whakatakotoranga e whai tikanga ana ki tētahi miihini e whakamana ana i tētahi hoahoa, ehara i te kereme hokohoko anake.

Ngā Pātai Auau: Kōwhiringa Pūnga IGBT Snubber

Q1：He aha tePūnga whakapūnga IGBTwhakamahia mō? 

Ka pehia e te pūnga hiko IGBT snubber ngā pikinga ngaohiko e puta ana ina whakaweto te IGBT, hei tiaki i te taputapu kei hipa atu i tōna ngaohiko aukati whakatauranga. Kua hangaia te pūnga hiko kiriata polypropylene whakarewa SMJ-P a CRE mō tēnei kaupapa, me te awhe ngaohiko whakatauranga mai i te 700V DC ki te 3000V DC.

Q2：Me pēhea te whiriwhiri i te kaihanga tika mō te pūnga snubber? 

Rapua he kaihanga e tuku ana i ngā pūnga kiriata ESR/ESL iti-ESR, ngā tiwhikete whaimana (IEC 61071, UL94V-0), me ngā kōwhiringa pūnga ritenga, ngā kōwhiringa ngaohiko rānei.CREhe kaihanga pūnga kiriata e tuku ana i te DC-Link,IGBT snubber, me ngā pūnga tātari-EMC mō ngā hikohiko mana, te pūngao whakahou, me ngā tono kawe tereina, me ngā whirihoranga arai tuaka me te radial e wātea ana.

Q3：He aha te mea e pai ake ai te pūnga kiriata polypropylene i ētahi atu momo pūnga snubber? 

He iti te ESR/ESL o te kiriata polypropylene whakarewa, he iti hoki ōna āhuatanga dielectric whakaora-ake, ā, he pumau hoki te mahi i runga i te whānuitanga o te pāmahana, koia te dielectric paerewa mō ngā tono snubber ki te whakataurite ki ngā momo whakakapinga hikohiko, uku rānei. Ka mahi te SMJ-P a CRE mai i te -40°C ki te +85°C me te roanga ora kua whakatauria he 100,000 hāora.

Kei konei ngā tuhinga hangarau katoa mō te SMJ-P: https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html

Ngā Tohutoro:

1. TE WHAKAPUTANGA I TE PŪNGAO HOU, "Pouaka Kirihou IGBT Snubber Capacitor SMJ-P"Pepa Raraunga Hua." （https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html）

2. Semikron Danfoss, “Te Ine i te Ngaohiko Tihi IGBT me te Whakatakotoranga Pūnga Snubber,” Tuhipoka Taupānga AN 07-006.

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

3. Severns, Rudy. “Te Hoahoa o ngā Snubber mō ngā Ara Hiko.” Tuhipoka Taupānga a Cornell Dubilier. （https://www.cde.com/resources/technical-papers/design.pdf）

E whakaata ana ngā whakatakotoranga hangarau i ngā raraunga kua whakaputaina i te wā e tuhia ana tēnei. Me whakaū ngā kaipānui i ngā whakatauranga o nāianei ki te pepa raraunga hou a te kaihanga i mua i te whakamahinga hoahoa whakamutunga.