Tam sim no, lub dielectric coefficient thiab ntim resistivity ntawm cov khoom siv dav siv gpo3 insulating yog siab dua li ntawm lub cev cable. Lub ntim resistivity muaj qee yam ntxwv ntawm irradiation crosslinked cable: lub neej kev laus ntawm gpo3 laminate insulating khoom feem ntau nyob ntawm nws cov thermal aging degree. Txoj kev no yog qhov hloov pauv ntawm cov tshuaj tiv thaiv xws li thermal oxidation, thermal cracking, thermal oxidation, polycondensation hauv cov khoom siv insulating, Yog li ntawd, gpo3 rwb thaiv tsev yog tsim nyob rau hauv airspace. Qhov kev tiv thaiv ib puag ncig thiab hluav taws xob tsis zoo ntawm cov khoom siv rwb thaiv tsev thermal ntau pom tseeb tias qhov loj dua tus neeg xyuas pib hla ntu (nruab nrab mm2) yog hu ua loj (tsawg dua lossis sib npaug mm2), thiab cov xaim nrog cov rwb thaiv tsev rov ua dua kuj hu ua thaiv.
Thaum qhov nruab nrab DC voltage yog mus txog, lub gpo3 insulating phaj them contactor txiav tawm lub them tsis kam, thiab pre charging ntawm lub intermediate circuit tiav. Ua ntej lub inverter ua hauj lwm, lub traction winding sai tsub lub txhawb capacitance ntawm nruab nrab DC Circuit Court rau. Lub sijhawm no, pib thiab them cov txheej txheem ntawm traction inverter tau ua tiav. Thaum lub inverter tuaj yeem muab tso rau hauv kev ua haujlwm thiab lub tsheb ciav hlau nres, lub inverter yog nyob rau hauv lub xeev rectifier, thiab plaub quadrant rectifier nyob rau hauv lub xeev inverter. Nws pub lub zog rau lub traction winding ntawm lub ntsiab transformer los ntawm nruab nrab DC Circuit Court thiab pub nws rov qab mus rau catenary. Lub ntsiab kev tsis sib xws ntawm gpo3 plaub quadrant rectifier rated input voltage rated input tam sim no intermediate voltage rated input peev xwm ntawm input zaus lub plaub quadrant rectifier yog ib tug mem tes dav modulation zaus converter. Lub kaw lus tswj cov AC voltage ntawm lub hwj chim mov los ntawm mem tes dav thiab theem, tswj lub amplitude ntawm AC tam sim no thiab lub waveform thiab theem ntawm AC tam sim no ntws mus rau hauv lub converter, thiaj li hais tias lub waveform ntawm AC tam sim no nyob ze rau lub sine yoj. ua tau; Cov theem sib txawv ntawm qhov tseem ceeb ntawm qhov hluav taws xob thiab qhov tseem ceeb tam sim no ntawm AC sab yog nyob ze, uas tsis tsuas yog txwv tsis pub muaj kev sib haum xeeb tam sim no, tab sis kuj tseem txhim kho lub zog ntawm lub tshuab hluav taws xob.
Yog li ntawd, piv nrog rau theem tswj rectifier, lub gpo3 insulated phaj plaub quadrant rectifier muaj hwj chim loj heev thiab ntau me me harmonic tam sim no. Lub modulation yoj theem ntawm plaub quadrant rectifier khub hluav taws xob locomotive zoo ib yam, tab sis cov cab kuj theem tsis sib xws. Ob txoj kev no tuaj yeem ua tiav lub hom phiaj ntawm kev sib haum xeeb, uas tuaj yeem ua kom muaj qhov sib npaug ntawm kaum qhov cuam tshuam tam sim no, thiab qhov hluav taws xob qhov chaw inverter siv los ntawm DC intermediate kab locomotive ntawm lub rwb thaiv tsev board chaw tsim tshuaj paus. Txoj kev no tuaj yeem tsis tsuas yog stabilize qhov nruab nrab voj voltage, tab sis kuj xyuas kom meej lub peev xwm loj txhawb nqa capacitance. Gpo3 tuaj yeem lim tau qhov kev txiav txim siab sib haum xeeb tam sim no tsim los ntawm plaub quadrant pulse rectifier thiab inverter. Ntawm lawv, qhov nruab nrab zaus DC Circuit Court feem ntau suav nrog nruab nrab voltage txhawb capacitor, instantaneous overvoltage txwv thiab lub ntsiab hauv av tiv thaiv Circuit Court. Gpo3 rwb thaiv tsev board yog txawv los ntawm yav dhau los AC tsav hluav taws xob locomotives nyob teb chaws Europe thiab Tuam Tshoj. Nws tshem tawm cov lim lim thib ob thiab siv software inverter tswj los tsim kev cuam tshuam ntawm qhov kev sib haum xeeb thib ob, zoo heev traction motor tam sim no ripple thiab torque ripple, thiab tsim ib qho kev txwv tam sim no.
Cov kev tiv thaiv Circuit Court yog tsim los ntawm ob series capacitors thiab ib tug grounding teeb liab sensor, thiab lub intermediate Circuit Court yog jumper txuas. Txhua gpo3 lub ntsiab zaus converter yog nruab nrog ib txheej ntawm kev ywj pheej grounding tiv thaiv Circuit Court, uas tuaj yeem saib xyuas thiab tiv thaiv grounding ntawm pab pawg tsav zaus converter nyias. Cov ntaub ntawv tshuaj ntsuam xyuas hauv zos raug xa mus rau qhov hloov pauv hloov ntawm cov chaw tsim hluav taws xob rwb thaiv tsev kom paub txog kev sib cais ntawm kev tiv thaiv hauv av. Lub traction inverter ntawm hom hluav taws xob locomotive yog ib qho khoom siv inverter muaj li ntawm cov khoom. Ib lub inverter nyob rau hauv tag nrho lub tsheb muab lub zog rau lub traction motor feem. Lub traction inverter txais yuav vector tswj hom kom lub traction lub cev muaj zog teb sai, thiaj li paub txog kev ywj pheej tswj ntawm txhua lub cev muaj zog traction nyob rau hauv ib tug loj ntau yam ntawm locomotives. Tag nrho cov locomotive adopts axial tswj hom. Thaum lub locomotive qag txoj kab uas hla txawv, qag load hloov lwm lub tsev, idling, thiab lwm yam yuav ua rau uneven load faib, gpo3 laminate tuaj yeem them nyiaj rau nws los ntawm kev tswj ntawm traction converter, thiaj li ua kom lub log tsheb loj tshaj plaws. Main Circuit Court tiv thaiv Circuit Court lub ntsiab transformer traction winding overcurrent tiv thaiv ib tug input tam sim no transformer yog teem nyob rau hauv lub input circuit ntawm txhua pab pawg neeg ntawm traction converter los tswj thiab saib xyuas lub them tam sim no ntawm lub converter thiab lub luv luv-circuit tam sim no ntawm lub traction winding. Nws qhov kev tiv thaiv tus nqi yog.
