Laminated BusBars Stray Inductance Optimization Guide: Yuav Ua Li Cas Txo Qhov Voltage Spikes Thiab Hloov Losses hauv SiC Inverters

Hauv kev hloov pauv ntawm lub zog hluav taws xob hluav taws xob los ntawm ib txwm siv silicon IGBTs mus rau silicon carbide (SiC) cov khoom siv, qhov teeb meem tseem ceeb tau maj mam tshwm sim: SiC cov cuab yeej muaj qhov hloov pauv ceev heev, tab sis tsis muaj zog inductance hauv lub cev tuaj yeem cuam tshuam kev ua tau zoo. Voltage spikes thiab siab - zaus oscillations tshwm sim los ntawm stray inductance tsis tsuas yog hem cov cuab yeej kev nyab xeeb tab sis kuj tseem txo qis qhov ua tau zoo ntawm SiC. High-Ntaus Laminated Busbars yog cov txheej txheem kev daws teeb meem los daws qhov teeb meem no. Kab lus no yuav piav qhia vim li cas Laminated Busbars tuaj yeem txo qhov inductance thiab yuav xaiv lawv li cas hauv kev siv tswv yim.

I. Thaum SiC cov cuab yeej siv nrawm dua, qhov tsis zoo inductance dhau los ua qhov teeb meem loj.

SiC MOSFETs hloov ntawm qhov nrawm dua li kaum npaug sai dua li cov khoom siv silicon, ua rau muaj zog dua thiab ua haujlwm tau zoo. Txawm li cas los xij, lwm sab ntawm lub npib yog tias kev hloov pauv sai ua rau muaj kev hloov pauv ntawm qhov tam sim no ntau dua (di / dt). Raws li cov qauv V=L × di / dt, txawm tias ib qho kev coj tsis ncaj ntawm tsuas yog ob peb nanohenries tuaj yeem tsim hluav taws xob ntau pua ntawm volts thoob plaws lub cuab yeej. Cov spikes superimposed ntawm lub tsheb npav voltage, thiab yog tias lawv tshaj lub cuab yeej tiv thaiv voltage txwv, lawv yuav tawg thiab hlawv.

Qhov teeb meem ntau dua yog tias qhov tsis muaj zog inductance kuj tuaj yeem cuam tshuam nrog cov khoom siv hluav taws xob tso tawm ntawm SiC cov khoom siv, ua kom muaj siab - zaus oscillations (ringing). Qhov no oscillation nce kev hloov pauv thiab ua rau lub cuab yeej ua kom sov, thiab tseem ua rau muaj kev cuam tshuam ntawm electromagnetic cuam tshuam, tiv thaiv lub kaw lus tsis dhau EMC daim ntawv pov thawj. Rau kev nyab xeeb, cov engineers feem ntau yuav tsum muaj kev sib haum xeeb: xaiv cov modules uas muaj kev tiv thaiv hluav taws xob ntau dua (nce nqi thiab poob) los yog ua kom lub rooj vag tsis kam ua kom qeeb ntawm kev hloov ceev (qhib ncaj qha rau qhov siab - zaus kom zoo dua ntawm SiC). Qhov tshwm sim ntawm peb - txheej laminated busbars lub hom phiaj kom tshem tawm qhov teeb meem no ntawm cov txheej txheem.

II. Vim li cas lub laminated busbar nyob rau hauv siab - fais fab converter txo inductance?

Traditional busbars muaj ob qhov sib cais, nrog rau pem hauv ntej thiab thim rov qab tam sim no sib nrug. Cov magnetic teb lawv tsim tsis tuaj yeem tshem tawm ib leeg, ua rau muaj kev cuam tshuam loj heev. Lub tswv yim tseem ceeb ntawm lub laminated busbar nyob rau hauv lub siab - lub hwj chim converter yog muab tso rau pem hauv ntej thiab rov qab conductors ua ke, ua rau lawv khiav zoo heev ua ke. Cov lus qhia tam sim no yog qhov sib txawv, thiab cov lus qhia ntawm qhov chaw sib nqus kuj yog qhov sib txawv; ob qhov chaw sib nqus tshem tawm ib leeg tawm, txo qis inductance mus rau ib qho -feem kaum lossis tsawg dua ntawm cov kev daws teeb meem.

Los ntawm kev faib cov khoom muag, laminated busbars tsis yog cov khoom siv hluav taws xob zoo tib yam, tab sis cov khoom siv hluav taws xob tsis zoo nrog cov qauv tsim qauv. Nyob ntawm seb muaj pes tsawg txheej txheej, cov qauv tsim muaj xws li peb, plaub, lossis tsib txheej. Cov khaubncaws sab nraud povtseg ntau dua, qhov sib npaug ntawm txoj kev tam sim no thiab qis dua qhov inductance. Raws li ib qho tseem ceeb kev twb kev txuas tivthaiv nyob rau hauv lub inverter, nws inductance tus nqi ncaj qha txiav txim lub sab sauv txwv ntawm tag nrho cov inverter dynamic kev ua tau zoo.

III. Yuav ua li cas xaiv Laminated Bus Bars rau txawv daim ntawv thov scenarios?

Cov ntsiab lus tseem ceeb rau kev xaiv yog: thawj zaug xav txog qib voltage, tom qab ntawd lub peev xwm tam sim no, thiab thaum kawg qhov chaw teeb tsa.

Cov tsheb tshiab lub zog tam sim no yog qhov nrawm tshaj plaws - thaj chaw thov loj hlob rau cov kab tsheb npav lambinated. Cov tsheb npav laminated rau cov tsheb fais fab yuav tsum nqa ntau pua amperes ntawm tam sim no nyob rau hauv qhov chaw me me thaum ua tau raws li lub tsheb- qib kev co thiab kub caij tsheb kauj vab. Lawv feem ntau siv ntau- txheej txheej txheej txheej kom sib npaug qis inductance thiab kev ntseeg siab.

Txoj kev tsheb ciav hlau thauj mus los muaj kev nyab xeeb siab heev. Subway lambinated busbars yuav tsum ua raws li cov qauv nruj rau kev tawg- pov thawj, hluav taws kub- pov thawj, thiab kev tiv thaiv corrosion- pov thawj, thaum tswj hluav taws xob cuam tshuam nyob rau hauv ib puag ncig ntawm cov qhov hauv av. Yog li ntawd, cov khoom uas muaj kev tiv thaiv tsim, xws li High Voltage Explosion-Proof Inverter Busbars, feem ntau xaiv.

Rau qhov nyuaj topologies xws li peb -theem inverters, lambinated bus bars rau peb -theem inverters yuav tsum tau integrate ntau yam zoo thiab tsis zoo tsheb npav nyob rau hauv ib tug busbar, uas ua rau cov txheej txheem complexity thiab ntau stringent yuav tsum tau rau interlayer rwb thaiv tsev thiab kev sib raug zoo raug. Laminated Busbars rau complex Busbar Installations yog tsim los rau industrial zaus converters, lub zog cia tshuab, thiab lwm yam kev siv, thiab txhawb customized multi- ceg tsim.