Dab tsi yog Charging Mechanism ntawm Chargers?
Kev them nyiaj yug Mechanism ntawm Chargers
Tshooj lus no qhia txog lub hauv paus ntsiab lus ntawm kev them nyiaj ntawm cov chargers los ntawm cais cov piv txwv ntawm cov qauv topological ntawm unidirectional thiab bidirectional charger circuits.
Unidirectional Charging Topology
Lub charger paub txog kev hloov pauv ntawm AC thiab DC los ntawm cov khoom siv hluav taws xob hluav taws xob. Inevitably, cov khoom siv hluav taws xob hluav taws xob qhia txog lub zog reactive, thiab lub zog reactive ntau dhau tuaj yeem ua rau lub zog hluav taws xob hloov hluav taws xob hloov pauv, txo cov khoom siv hluav taws xob zoo, thiab nce kab poob. Qhov piv ntawm lub zog ua haujlwm rau lub zog pom hauv lub voj voog yog txhais tau tias yog lub zog ua haujlwm. Txhawm rau txwv tsis pub muaj zog ntau dhau los ntawm qhov kawg -tus neeg siv rau hauv daim phiaj hluav taws xob, kev txwv nruj ntawm cov khoom siv hluav taws xob raug txwv rau kev siv hluav taws xob hauv tsev thiab kev lag luam, feem ntau tsis pub tsawg dua 0.8 ~ 0.9. Ib txoj hauv kev tau txais yog PFC (Power Factor Correction) thev naus laus zis, uas tuaj yeem tshem tawm cov pa phem ntawm lub zog hluav taws xob thiab txhim kho cov khoom siv hluav taws xob.
Ib qho -theem puv- choj PFC thev naus laus zis muaj qhov zoo xws li cov qauv yooj yim, kev ua haujlwm siab, thiab siab - zaus transformer nrog ob npaug - kawg excitation, ua rau nws haum rau siab - daim ntawv thov fais fab. Ib zaug xwb-theem puv-bridge PFC converter raws li tag nrho- choj qauv yog qhia nyob rau hauv daim duab 11-21. Nws ua haujlwm hauv ob lub xeev:Upper thiab qis caj npab conductionthiabopposite caj npab conduction. Thaum lub sij hawm sab sauv thiab sab caj npab conduction, tam sim no nyob rau hauv input inductor nce. Thaum lub sij hawm opposite caj npab conduction, tam sim no nyob rau hauv lub input inductor ntog. Lub kaw lus tswj tau kho qhov sib piv (lub voj voog lub luag haujlwm) ntawm lub sijhawm ua haujlwm sab sauv thiab sab caj npab nyob rau hauv lub sijhawm them thiab tawm lub voj voog ntawm cov khoom siv inductor los kho qhov loj ntawm qhov tam sim no hauv cov khoom siv inductor, ua rau cov khoom siv tam sim no yog sine yoj nyob rau theem nrog cov input voltage. Qhov no thaum kawg tshem tawm siab - txiav txim tam sim no harmonics thiab ua tiav kev kho lub zog.
Txheeb xyuas cov txheej txheem ntawm lub zog ntws, nws tuaj yeem pom tias thaum lub sij hawm sab sauv thiab sab caj npab conduction, qhov hluav taws xob hla lub siab - zaus transformer yog 0, thiab cov zis lim capacitor muab lub zog rau lub load; Thaum lub sij hawm rov qab sab caj npab conduction, siab - zaus transformer hloov lub zog khaws cia hauv input inductor thiab muab nws
Lub zog los ntawm cov khoom siv hluav taws xob tau hloov mus rau sab thib ob ntawm lub transformer. Tom qab siab -frequency rectification thiab filtering, nws muab lub zog rau lub load. Los ntawm kev tswj lub luag haujlwm lub voj voog ntawm lub kaw lus, cov zis hluav taws xob tuaj yeem hloov pauv, khaws cov zis hluav taws xob ntawm tus nqi ntsuas. Nyob rau hauv ib lub voj voog ua haujlwm, lub input inductor ua tiav ob lub sijhawm them nqi thiab tawm mus, thiab qhov siab - zaus transformer zoo siab ob zaug, nrog rau ob qho kev qhia excitation yog opposite. Qhov no siv cov tub ntxhais sib nqus hauv ib qho kev thawb- rub, txhim kho qhov sib nqus core siv tus nqi ntawm lub transformer.
Bidirectional Charging Topology
Daim duab 11-22 qhia cov qauv topological ntawm lub ntsiab Circuit Court rau them thiab tso tawm ntawm ib tug bidirectional charger, uas muaj xws li ib tug peb -theem ib nrab-bridge voltage-source PWM rectifier thiab ib tug bidirectional DC / DC converter.
Peb-theem AC fais fab qhov chaw yog feem ntau siv nyob rau hauv industrial high-voltage thiab high- fais fab kev siv. Bidirectional txhais tau hais tias lub zog ntws tuaj yeem yog los ntawm daim phiaj sab mus rau lub tsheb roj teeb, lossis los ntawm sab roj teeb mus rau sab kab sib chaws. Qhov peb -theem ib nrab-bridge voltage- qhov chaw PWM rectifier nyob rau hauv daim duab yog ib hom bidirectional PWM rectifier, uas muaj qhov zoo xws li ua tiav bidirectional zog khiav, ceev ceev dynamic teb, thiab zoo ruaj khov- lub xeev kev ua tau zoo. Thaum nws nyob hauvrectification xeev, lub zog ntws tawm ntawm daim phiaj sab, qhov tam sim no yog sinusoidal, thiab nws theem yog tib yam li daim phiaj voltage; thaum nws ua haujlwm hauv lubactive inversion xeev, lub zog khaws cia rau hauv lub tsheb fais fab roj teeb tau rov qab rau hauv daim phiaj fais fab, thiab daim phiaj -sab tam sim no thiab tam sim no waveform yog ob qho tib si sinusoidal, nrog rau theem sib txawv ntawm 180℃.
Lub bidirectional DC / DC converter muaj qhov zoo xws li cov lus teb ceev ceev, siab zog hloov dua siab tshiab, thiab tsawg dua cov khoom siv hluav taws xob. Raws li pom hauv daim duab 11-22, thaum lub charger them lub roj teeb hluav taws xob, hloovS1yog ua, thaum hloovS2ib txwm tawm. Yog li ntawd, lub bidirectional PWM rectifier ua hauj lwm nyob rau hauv lub rectification xeev, thiab lub bidirectional DC / DC converter yog nyob rau hauv cov kauj ruam -pub lub xeev, thiab lub zog ntws los ntawm daim phiaj sab mus rau sab roj teeb; thaum lub roj teeb tawm, hloovS2yog off, switchS1yog ua, lub bidirectional DC / DC converter yog nyob rau hauv cov kauj ruam - nce boost xeev, thiab lub bidirectional PWM rectifier ua hauj lwm nyob rau hauv lub active inversion xeev, thiab lub zog khaws cia nyob rau hauv lub roj teeb yog pub rov qab mus rau lub hwj chim daim phiaj los ntawm lub rectifier.
