He aha ka mea e hana ʻia i ka Microsecond a pio ka IGBT

I kēlā me kēia manawaIGBTpio, hana ʻia kahi mea ʻino i loko o kahi manawa pōkole loa.

Hoʻohālikelike ʻana o ke ʻano nalu uila e hōʻike ana i ka spike hoʻopau IGBT me a me ka ʻole o kahi capacitor CRE snubber

Hoʻopau ʻia ke au e kahe ana ma o ka hāmeʻa. ʻAʻohe wahi e hele ai ka ikehu i mālama ʻia i loko o ka inductance hele hewa o ke kaapuni. Hoʻokuʻu ʻia ia ma ke ʻano he piʻi voltage. Inā ʻaʻohe mea e omo i kēlā piʻi, hiki iā ia ke ʻoi aku ma mua o ka voltage i helu ʻia o ka IGBT a hōʻino i ka hāmeʻa.

ʻO kēia ka pilikia kikoʻī i kūkulu ʻia ai kahi capacitor snubber e hoʻoponopono. A he mea kūpono ke hoʻomaopopo pono ʻia, no ka mea, ʻo ka ʻokoʻa ma waena o kahi capacitor snubber maikaʻi a me kahi mediocre e hōʻike ʻia ana he mau hemahema o ka hāmeʻa i nā mahina a i ʻole nā ​​​​makahiki ma hope o ka laina, ʻaʻole i ka lā mua.

Ka Hana o kahi Snubber Capacitor

A capacitor snubbere noho ana ma kēlā ʻaoʻao o ka hāmeʻa hoʻololi a hāʻawi i kēlā ikehu i hoʻokuʻu ʻia i kahi palekana e hele ai.

Ke pio ka IGBT, hoʻopili ka capacitor i ke au transient a kaupalena i ka wikiwiki o ka piʻi ʻana o ka voltage (dv/dt) ma waena o ka hāmeʻa. Hana kēlā hana hoʻokahi i ʻekolu mau mea i ka manawa hoʻokahi: kāohi ia i nā piʻi voltage, hoʻemi ia i nā pohō hoʻololi, a hoʻomaʻemaʻe ia i ke au koke a me nā loli voltage e hoʻoluhi nei i ke koena o ke kaapuni.

I mea e hana maikaʻi ai kēia, ʻelua mau waiwai uila i ʻoi aku ka nui ma mua o nā mea ʻē aʻe: ke kū'ē haʻahaʻa like like (ESR) a me ka inductance like like haʻahaʻa (ESL). Hoʻolohi ka ESR kiʻekiʻe a i ʻole ESL i ka pane a ka capacitor a kaupalena i ka maikaʻi o ka hiki iā ia ke hoʻopaʻa i kahi transient wikiwiki. ʻO ia ke kumu hoʻi ke kiʻi polypropylene metallized ka mea i koho ʻia no ka hapa nui o nā noi snubber. Hoʻohui ia i ka ESR/ESL haʻahaʻa me kahi dielectric ho'ōla ponoʻī, no laila e hoʻomau ka capacitor i ka hana hilinaʻi ʻoiai ma hope o ke kaumaha voltage pinepine.

I loko o kaSMJ-PʻO ka pahu palakiko IGBT Snubber Capacitor a CRE

ʻO ka SMJ-P a CRE kahi capacitor snubber pahu plastik i kūkulu ʻia no ka pale ʻana iā IGBT, me nā alakaʻi hoʻokomo keleawe i uhi ʻia me ka tin no ka hoʻokomo pololei ʻana ma luna o ka module IGBT.

ʻO ka capacitor IGBT snubber pahu plastik CRE SMJ-P me nā alakaʻi keleawe i uhi ʻia me ka tin

Nā palena loea koʻikoʻi:

Ua kūkulu ʻia ke kūkulu ʻana ponoʻī a puni ka manaʻo like me ka hana uila. Ua sila ʻia ka hihia plastik me ka resin, ka mea e pale ai i ka wili mai ka makū a me ke kaumaha mechanical. Loaʻa nā hoʻonohonoho alakaʻi axial a me radial, no laila hiki i ka ʻohana capacitor like ke kūpono i nā hoʻonohonoho modula like ʻole me ka ʻole o ka hoʻolālā hou ʻana i kēlā me kēia manawa.

ʻO kahi kikoʻī nui o nā ʻatikala e hōʻalo: ʻO ke Geometry alakaʻi he mea nui e like me ka Capacitance

ʻO ka hapa nuicapacitor snubberUa pau ka ʻike ma ka "hoʻohana i ka ʻili polypropylene, ho'ōla ia iā ia iho." He ʻoiaʻiʻo kēlā, akā ʻo ka hapalua wale nō ia o ka moʻolelo ʻenekinia, a ʻo ka hapalua ia ʻaʻole i hoʻoholo maoli inā hana kahi ʻāpana i hāʻawi ʻia i loko o kahi kaapuni i hāʻawi ʻia.

ʻO ka hapalua ʻē aʻe he loop inductance. ʻAʻole hōʻoia ka waiwai capacitance wale nō i kahi spike voltage haʻahaʻa inā mau ke kiʻekiʻe o ka inductance ponoʻī o ka capacitor, no ka mea, ʻo ke koena o ka inductance i loko o ka loop ma waena o nā terminals a me nā pilina kūloko ke kuleana no ka hoʻoulu ʻana i kahi voltage spike a i ʻole transient. I nā huaʻōlelo ʻē aʻe, hiki i kahi ʻāpana capacitance kiʻekiʻe me nā alakaʻi lōʻihi a lahilahi ke hana maikaʻi ʻole i kahi ʻāpana liʻiliʻi me nā terminals pōkole a ākea.

Kiʻikuhi e hoʻohālikelike ana i ka inductance loop ma waena o nā kikowaena capacitor snubber long-lead a me direct-mount

ʻO kēia ke kumu e ʻoi aku ai ke koʻikoʻi o ke ʻano kau ʻana ma mua o ka mea i ʻike ʻia ma kahi ʻikepili. ʻO nā capacitors me nā kikowaena ākea a pālahalaha hiki ke wili pololei ʻia ma ka module IGBT e loaʻa ka inductance ponoʻī haʻahaʻa ma mua o nā ʻāpana i hoʻopili ʻia ma o nā kaula alakaʻi lōʻihi. Loaʻa nā alakaʻi hoʻokomo keleawe tin-plated a SMJ-P a me ke koho o ka hoʻonohonoho axial a radial paha no kēia kumu: e mālama i ke ala pili pōkole a e hāʻawi ka capacitance i helu ʻia i ka pale dv/dt i kuhikuhi ʻia no ia.

He mea nui nō hoʻi ka waiwai ho'ōla ponoʻī, ma ke kaʻawale. ʻO kahi kiʻiʻoniʻoni polypropylene i hoʻoheheʻe ʻia e ʻike ʻia ana kahi haki dielectric kūloko e hoʻokaʻawale i kēlā hewa i nā microseconds, ma kahi o ka hāʻule ʻole ʻana, ʻo ia ke kumu e noho mau ai ka kiʻiʻoniʻoni i ka dielectric maʻamau no kēia noi ma mua o nā koho ceramic a electrolytic paha. Akā ʻo ka ho'ōla ponoʻī a me ka inductance loop haʻahaʻa he ʻelua mau pilikia ʻenekinia like ʻole, a pono e loaʻa i kahi capacitor snubber nā mea ʻelua i ka pololei.

ʻO SMJ-P i loko o ka laulā ākea o ka CRE's Snubber Capacitor

ʻO kaʻAno pahu palaki SMJ-Pʻo ia kekahi o nā hoʻonohonoho alakaʻi a me nā hihia a CRE e hāʻawi ai no ka pale ʻana i ka IGBT a me GTO snubber. Ma muli o ka wahi kau, ke kuhikuhi alakaʻi, a me nā koi thermal, hana pū ʻo CRE i nā ʻano axial-lead a me Mylar-tape i kūkulu ʻia ma ka ʻenehana kiʻiʻoniʻoni polypropylene metallized like a hana ʻia i nā kūlana hana ESR/ESL like. ʻO ke ʻano kēia, hiki i kahi hui hoʻolālā ke neʻe ma waena o nā ʻano i ka wā e ulu ai kahi hoʻolālā, me ka ʻole o ka hoʻoponopono hou ʻana i ka ʻōnaehana dielectric ma lalo mai ka wā ʻole.

Pehea e hōʻoia ai nā ʻenekinia i kahi koho Snubber Capacitor

ʻAʻole lawa ka helu capacitance a me ka voltage ma kahi ʻikepili e hōʻoia i ka hana ʻana o kahi capacitor snubber i kahi kaapuni i hāʻawi ʻia. ʻO ke ʻano hōʻoia maʻamau, i palapala ʻia e SEMIKRON ma kāna mau memo noi IGBT, ʻo ia ke ana ʻana i ke ʻano nalu voltage collector-emitter maoli i ka wā e pio ai, me ka ʻole o ka capacitor snubber ma kahi, a hōʻoia i ka noho ʻana o ka piko i loko o ka voltage blocking i helu ʻia o ka IGBT ma lalo o nā kūlana ʻino loa. Ma hope o ka pio ʻana, hoʻololi ke au i loko o ka capacitor snubber, e hana ana i kahi piko o ke au i ka manawa hoʻololi, a ukali ʻia e kahi oscillation damped ma waena o ka capacitor snubber a me ka DC-link, me ke alapine oscillation i hoʻonohonoho ʻia e ka inductance parasitic o ka bus bar a me ka waiwai o ka capacitor snubber.

ʻO kēia koʻikoʻi like ma ke ʻano alakaʻi a me nā lako kikowaena pololei-mauna ma ke ʻano he loli hoʻolālā mua, ma mua o kahi manaʻo ma hope, ua hōʻike hou ʻia i loko o nā palapala hoʻolālā uila mana i hoʻolaha nui ʻia, me ka kuhikuhi hoʻolālā snubber a Rudy Severns i paʻi ʻia e Cornell Dubilier. Ua hoʻokumu ʻia ke ʻano physics ma lalo o IEC 61071, ke kūlana honua e hoʻomalu ana i nā capacitors no nā uila mana, kahi i hoʻolālā ʻia ai ʻo SMJ-P e hoʻokō. ʻO ke kiko ma waena o kēia mau kumu āpau he kūlike:ʻaʻole wale ka pahuhopu he waiwai capacitance ma kahi pepa kikoʻī, he ana ia, hiki ke hoʻemi ʻia ka voltage peak i ka wā e pio ai.

Ma hea e hoʻohana ʻia ai nā Capacitors SMJ-P

Kiʻikuhi kaapuni IGBT hapa-alahaka me ka snubber capacitor C3 i hoʻopili ʻia ma nā alahao kaʻa DC.

ʻAʻole he ʻāpana niche nā capacitors Snubber. Hōʻike lākou ma nā wahi a pau e pono ai ka pale ʻana o kahi mea hoʻololi mana mai kāna hana hoʻololi ponoʻī:

• Nā mea hoʻohuli a me nā hoʻokele motika, kahi e hoʻololi mau ai nā IGBT a pono i ka palekana dv/dt mau

•Nā mea uila mana kaʻa uila, kahi e pili pono ai ka pono o ka hoʻololi ʻana a me ka lōʻihi o ka ʻāpana i ka laulā a me ka hilinaʻi

•Nā ʻōnaehana ikehu hou, me nā inverters solar, kahi e pale ai ka hoʻopau ʻana i ka voltage spike i nā mea hoʻololi mana kiʻekiʻe i nā makahiki he ʻumi o ka hana

•Nā mea hoʻoponopono,Nā SVC, a me nā lako mana locomotive, kahi e hoʻolilo ai nā au pulse kiʻekiʻe a me nā pōʻaiapuni hana koi i ka hana ESR a me ESL i mea koʻikoʻi loa

ʻO ke kaula maʻamau ma waena o kēia mau polokalamu āpau he like: hoʻopuka nā mea hoʻololi i nā transients, a pono e omo maʻemaʻe kekahi mea iā lākou, i kēlā me kēia pōʻaiapuni, no ke ola o ka ʻōnaehana.

No ke aha e hui pū ai nā koho mea hana a me nā koho hana i ka hala ʻana o ka manawa

Maʻalahi ke ʻano o ka hana a ka snubber capacitor ma kahi ʻikepili. I ka hana maoli, hoʻoholo ʻia ka hana e nā kikoʻī i ʻike ʻole ʻia a hiki i ka holo ʻana o ka ʻōnaehana no nā makahiki: pehea ka mau o ka ho'ōla ponoʻī ʻana o ka dielectric ma hope o ke kaumaha, pehea ka paʻa o ka hoʻomalu ʻana o ESR a me ESL ma waena o kahi pūʻulu hana, a inā paʻa ke kū'ē ʻana o ka insulation ma waena o ka pae mahana piha ma mua o ka mahana o ka lumi wale nō.

ʻO kēia ke kumu e hoʻopaʻa ai ka SMJ-P a CRE i kāna helu manaʻolana ola 100,000 hola i kahi kūlana mahana wela kikoʻī (≤85°C), ma mua o ka haʻi ʻana iā ia ma ke ʻano he helu maʻamau, a no ke aha i kuhikuhi ʻokoʻa ʻia ai ke kūʻē ʻana o ka insulation e ka laulā capacitance ma mua o kahi helu blanket hoʻokahi. ʻO kēia nā ʻano kikoʻī e koʻikoʻi i kahi ʻenekinia e hōʻoia ana i kahi hoʻolālā, ʻaʻole wale kahi koi kūʻai aku.

Nā nīnau i nīnau pinepine ʻia: Koho ʻana o ka IGBT Snubber Capacitor

Q1：He aha kahiKa mea hoʻonui IGBT snubberi hoʻohana ʻia no? 

Hoʻopau kahi capacitor snubber IGBT i nā spike voltage i hana ʻia ke pio kahi IGBT, e pale ana i ka hāmeʻa mai ka ʻoi aku ma mua o kāna voltage blocking i helu ʻia. Ua hana ʻia ka capacitor film polypropylene metallized SMJ-P a CRE no kēia kumu, me kahi pae voltage i helu ʻia o 700V DC a i 3000V DC.

Q2：Pehea e koho ai i ka mea hana capacitor snubber kūpono? 

E ʻimi i kahi mea hana e hāʻawi ana i nā capacitors kiʻiʻoniʻoni haʻahaʻa-ESR/ESL, nā palapala hōʻoia i ʻike ʻia (IEC 61071, UL94V-0), a me nā koho capacitance a i ʻole voltage maʻamau.KREhe mea hana capacitor kiʻiʻoniʻoni e hoʻolako ana iā DC-Link,ʻO ka mea hoʻopau IGBT, a me nā capacitors kānana EMC no nā mea uila mana, ka ikehu hou, a me nā noi transit kaʻaahi, me nā hoʻonohonoho alakaʻi axial a me radial i loaʻa.

Q3：He aha ka mea e ʻoi aku ai ka maikaʻi o ka capacitor kiʻi polypropylene ma mua o nā ʻano capacitor snubber ʻē aʻe? 

Hāʻawi ka ʻili polypropylene metallized i ka ESR/ESL haʻahaʻa, nā waiwai dielectric ho'ōla pono'ī, a me ka hana paʻa ma luna o kahi ākea ākea o ka mahana, e lilo ia i dielectric maʻamau no nā noi snubber i hoʻohālikelike ʻia me nā koho electrolytic a i ʻole ceramic. Hana ka SMJ-P a CRE mai -40°C a i +85°C me kahi manaʻolana ola he 100,000 hola.

Loaʻa ka palapala loea piha no ka SMJ-P ma aneʻi: https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html

Nā Kuhikuhi:

1. HŌʻIKE IKE HOU, "Pahu Palakiko IGBT Snubber Capacitor SMJ-P"Palapala ʻIkepili Huahana." （https://www.crecapacitors.com/IGBT-GTO-Snubber-Capacitors-pl47325307.html）

2. Semikron Danfoss, “Ke Ana ʻana o ka IGBT Peak Voltage a me ke Kikoʻī ʻana o ka Snubber Capacitor, “Nānā Noi AN 07-006.

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

3. Severns, Rudy. “Hoʻolālā ʻana o nā Snubbers no nā Kaapuni Mana.” Cornell Dubilier Application Note. （https://www.cde.com/resources/technical-papers/design.pdf）

Hōʻike nā kikoʻī loea i ka ʻikepili i paʻi ʻia i ka wā kākau. Pono ka poʻe heluhelu e hōʻoia i nā loiloi o kēia manawa e kūʻē i ka pepa ʻikepili hou loa a ka mea hana ma mua o ka hoʻohana hope ʻana i ka hoʻolālā.