Malo amagalimoto ndi amodzi mwa malo ovuta kwambiri pamagetsi. LeroMa charger a EVmapangidwe amachulukirachulukira ndi zida zamagetsi zodziwika bwino, kuphatikiza zowongolera zamagetsi, infotainment, sensing, mapaketi a batri, kasamalidwe ka batri,electric galimoto point, ndi ma charger omwe ali pa board. Kuphatikiza pa kutentha, ma voltage transients, ndi kusokoneza kwa ma elekitiroma (EMI) m'malo amagalimoto, chojambulira chomwe chili pa board chiyenera kulumikizana ndi grid yamagetsi ya AC, zomwe zimafuna kutetezedwa ku kusokonekera kwa mizere ya AC kuti igwire ntchito yodalirika.
Masiku ano opanga zigawo amapereka zida zingapo zotetezera mabwalo amagetsi. Chifukwa cholumikizidwa ndi gridi, chitetezo cha charger pa board kuchokera ku ma voltages okwera pogwiritsa ntchito zida zapadera ndizofunikira.
Yankho lapadera limaphatikiza SIDACtor ndi Varistor (SMD kapena THT), kufika pamagetsi otsika otsika pansi pa kugunda kwamphamvu. Kuphatikiza kwa SIDACtor + MOV kumathandizira akatswiri opanga magalimoto kukhathamiritsa zosankhidwazo, chifukwa chake, mtengo wamagetsi opangira magetsi pamapangidwewo. Magawowa amafunikira kuti musinthe voteji ya AC kukhala voteji ya DC kuti mulipire galimotokulipiritsa batire pa board.
Chithunzi 1. Chithunzi cha Block Charger Pa bolodi
Pa BoardCharger(OBC) ali pachiwopsezo panthawiyiMtengo wa EVchifukwa cha kukhudzana ndi zochitika za overvoltage zomwe zingachitike pa gridi yamagetsi. Kapangidwe kake kamayenera kuteteza ma semiconductors amphamvu kuti asawonongeke chifukwa ma voltages opitilira malire awo amatha kuwawononga. Kuti awonjezere kudalirika kwa EV ndi moyo wake wonse, mainjiniya amayenera kuthana ndi kuchuluka kwa zomwe zikuchitika komanso kutsitsa ma voltages ochepera pamapangidwe awo.
Zitsanzo za magwero okwera ma voltage transient ndi awa:
Kusintha kwa capacitive katundu
Kusintha kwamagetsi otsika ndi ma resonant ma frequency
Maulendo afupiafupi chifukwa cha zomangamanga, ngozi zapamsewu, kapena mphepo yamkuntho
Ma fuse oyambitsa komanso chitetezo cha overvoltage.
Chithunzi 2. Analimbikitsa Circuit Pakuti Differential Ndipo Common mumalowedwe Kanthawi Voltage Circuit Protection Kugwiritsa MOVs Ndi GDT.
A 20mm MOV imakondedwa chifukwa chodalirika komanso chitetezo. 20mm MOV imagwira 45 pulses ya 6kV/3kA surge current, yomwe ndi yolimba kwambiri kuposa 14mm MOV. Chimbale cha 14mm chimatha kungogwira ma surges 14 pa moyo wake wonse.
Chithunzi 3. Clamping Magwiridwe Of The Little lnfuse V14P385AUTO MOV Pansi 2kV Ndipo 4kV Surges. Mphamvu ya Clamping imaposa 1000V.
Chitsanzo kusankha kutsimikiza
Level 1 Charger—120VAC, gawo limodzi lozungulira: Kutentha koyembekezeka kozungulira ndi 100°C.
Kuti mudziwe zambiri za kugwiritsa ntchito SIDACt kapena Protection Thyristors mumagalimoto amagetsi, tsitsani mfundo ya Momwe Mungasankhire Optimum Transient Surge Protection for EV On-Board Chargers application, mwachilolezo cha Little fuse, Inc.
Nthawi yotumiza: Jan-18-2024