Lub peev xwm tawg thiab teb ceev ntawm cov fuses hauv tsheb fais fab yog qhov tseem ceeb heev. Lawv cuam tshuam ncaj qha rau kev nyab xeeb ntawm lub tsheb thaum tsis ua haujlwm, kev tiv thaiv cov khoom siv, thiab kev ruaj ntseg ntawm lub cev.
I. Qhov tseem ceeb ntawm Arc-Kev tua muaj peev xwm
Arc-extinguishing muaj peev xwm hais txog lub peev xwm siab tshaj plaws ntawm lub fuse los txiav tawm qhov txhaum tam sim no thaum muaj qhov luv luv lossis overload. Nws feem ntau yog ntsuas hauv kiloamperes (kA). Qhov luv luv -circuit tam sim no ntawm lub siab -voltage system nyob rau hauv hluav taws xob tsheb (xws li roj teeb pob, lub cev muaj zog controllers) muaj peev xwm ncav cuag ntau txhiab los yog txawm kaum tawm txhiab amperes. Yog hais tias lub arc -extinguishing muaj peev xwm ntawm lub fuse tsis txaus, cov hauv qab no tej zaum yuav tshwm sim:
Cov cuab yeej puas tsuaj
Cov cua kub loj uas tsim los ntawm luv luv - tam sim no tuaj yeem rhuav tshem cov khoom hluav taws xob tam sim ntawd (xws li lub cev muaj zog windings, cov khoom siv hluav taws xob semiconductor), thiab tseem ua rau cov saw hlau tsis ua haujlwm.
Qhov siab -voltage direct tam sim no arc tsis muaj ntuj zero- hla taw tes, thiab nws qhov kev ploj tuag yog qhov nyuaj dua li qhov hloov pauv tam sim no. Yog hais tias lub fuse lub peev xwm tawg tsis txaus, lub arc yuav txuas ntxiv hlawv, igniting cov ntaub ntawv nyob ib puag ncig los yog rwb thaiv tsev, ua rau lub tsheb hluav taws.
System paralysis
Tom qab lub fuse tshuab, nws yuav tsum tau hloov. Yog tias lub peev xwm tawg tsis txaus, ua rau lub fuse tawg lossis ua rau lwm cov khoom puas tsuaj, cov nqi kho thiab lub sijhawm yuav nce ntxiv, thiab tseem cuam tshuam rau tag nrho kev nyab xeeb ntawm lub tsheb.
Kev lag luam xav tau:
Fais tsheb fuses yuav tsum ua raws li cov qauv thoob ntiaj teb. Lub peev xwm tawg feem ntau yuav tsum siab dua 5kA - 20kA kom npog qhov xwm txheej tsis zoo.
II. Qhov tseem ceeb ntawm teb ceev
Teb ceev yog hais txog lub sij hawm nws yuav siv sij hawm rau ib tug fuse los ntes ib tug overcurrent thiab txiav tawm tag nrho Circuit Court, feem ntau yog ntsuas nyob rau hauv milliseconds (ms). Lub siab -voltage system ntawm hluav taws xob tsheb muaj qhov xav tau siab heev rau cov lus teb ceev, rau cov laj thawj hauv qab no:
Tiv thaiv cov khoom siv thermal puas
Lub sijhawm tiv thaiv tshav kub ntawm cov khoom siv hluav taws xob (xws li IGBT modules, lub cev muaj zog windings) raug txwv. Piv txwv li, lub cev muaj zog windings yuav ncav cuag qhov kub thiab txias tsis pub dhau 10ms nyob rau hauv luv luv -circuit tam sim no. Yog tias cov lus teb fuse qeeb dhau, cov khoom siv yuav raug puas tsuaj tas mus li.
Tshem tawm arc zog
Lub zog ntawm qhov ncaj qha tam sim no arc yog proportional rau square ntawm tam sim no thiab lub sijhawm. Kev txiav tawm sai sai tuaj yeem txo lub zog arc thiab txo qhov kev pheej hmoo ntawm hluav taws.
Txhim kho qhov system stability
Lub roj teeb tswj system (BMS) thiab lub cev muaj zog tswj (MCU) ntawm lub tsheb hluav taws xob yuav tsum tau saib xyuas qhov tam sim no hauv lub sijhawm. Yog tias lub fuse teb qeeb dhau, qhov txhaum tam sim no tuaj yeem ua rau lwm yam khoom siv tiv thaiv (xws li tus contactor disconnecting), ua rau lub cev ua haujlwm tsis zoo lossis poob.
Kev lag luam xav tau:
Lub sij hawm teb ntawm siab -kev ua tau zoo fuses feem ntau tswj tsis pub dhau 1ms - 5ms. Qee cov fuses nquag lossis cov fuses ntse tuaj yeem ua kom luv ntxiv mus rau qib 0.1ms.
III. Synergistic Effect of Breaking Capacity and Response Speed
Hom Daim Ntawv Thov Scenarios
Roj teeb pob luv Circuit Court tiv thaiv: Lub fuse yuav tsum tau txiav tawm tam sim no siab tshaj 10kA nyob rau hauv 3ms los tiv thaiv lub roj teeb thermal runaway.
Kev Tiv Thaiv Kev Tiv Thaiv: Kev them nyiaj ceev ceev yuav tsum muaj lub fuse txhawm rau txhawm rau tam sim no ntawm 5kA hauv 5ms kom tsis txhob muaj kev puas tsuaj rau lub chaw nres tsheb lossis lub tsheb them nyiaj.
Kev tiv thaiv lub cev muaj zog: Lub fuse yuav tsum ua haujlwm ua ke nrog tus contactor kom txiav tawm qhov txhaum tam sim no hauv 1ms los tiv thaiv IGBT module los ntawm kev kub hnyiab.
Kev Sib Tw
Nyuaj hauv DC Breaking: DC arcs tsis muaj xoom- hla taw tes, yog li tsim tshwj xeeb (xws li sib nqus tshuab, xuab zeb sau) yog xav tau kom nrawm arc extinction.
Qhov sib npaug ntawm Teb Ceev thiab Lifespan: Cov lus teb ceev ceev tuaj yeem ua rau lub neej luv ntawm lub fuse, yog li kev ua kom zoo ntawm cov khoom siv (xws li qis- melting-} taw tes alloys) thiab kev txhim kho cov qauv (xws li bimetallic trigger) yog xav tau kom ua tiav qhov sib npaug.
