nkhani

Timagwiritsa ntchito makeke kuti tikuthandizeni kudziwa zambiri. Mukapitiliza kuyang'ana tsamba ili, mukuvomera kugwiritsa ntchito makeke.Zambiri.
Ma inductors mu makina osinthira magalimoto a DC-DC akuyenera kusankhidwa mosamala kuti akwaniritse kuphatikiza koyenera kwa mtengo, mtundu, ndi magwiridwe antchito amagetsi. ma off akhoza kupangidwa.
Pali pafupifupi 80 ntchito zamagetsi zosiyanasiyana zamagetsi zamagalimoto, ndipo ntchito iliyonse imafuna njanji yake yokhazikika, yomwe imachokera ku magetsi a batri.Izi zikhoza kutheka ndi chowongolera chachikulu, chotayika cha "linear", koma njira yabwino ndiyo kugwiritsa ntchito. "buck" kapena "buck-boost" switching regulator, chifukwa izi zimatha kukwaniritsa bwino komanso kuchita bwino kuposa 90%. Compactness.This mtundu wa kusintha regulator amafuna inductor. Kusankha chigawo choyenera nthawi zina kumawoneka ngati kosamvetsetseka, chifukwa mawerengedwe ofunikira adachokera m'zaka za zana la 19. Okonza amafuna kuona equation momwe angathe "kulumikiza" magawo awo a ntchito ndikupeza "zolondola" inductance ndi mavoti apano kuti akhoza kungosankha kuchokera m'kabudula wa magawo. ndipo ikuyenera kukonzedwanso kuti muwone momwe ma inductors akunja amakwanira.
Tiyeni tiganizire za buck regulator (Chithunzi 1), kumene Vin ndi batire voteji, Vout ndi otsika voteji purosesa mphamvu njanji, ndi SW1 ndi SW2 anazimitsa ndi kuzimitsa alternately.The yosavuta kusamutsa ntchito equation ndi Vout = Vin.Ton/ (Ton + Toff) pamene Ton ndi mtengo pamene SW1 yatsekedwa ndipo Toff ndi mtengo pamene yatsegulidwa.Palibe inductance mu equation iyi, ndiye imachita chiyani? Mwachidule, inductor iyenera kusunga mphamvu zokwanira pamene SW1 imatsegulidwa kuti ilole kuti ikhalebe yotulutsa pamene yazimitsidwa.Ndizotheka kuwerengera mphamvu yosungidwa ndikuyifananitsa ndi mphamvu yofunikira, koma pali zinthu zina zomwe ziyenera kuganiziridwa poyamba.Kusintha kosintha kwa SW1 ndipo SW2 imapangitsa kuti panopa mu inductor iwuke ndi kugwa, motero imapanga katatu "ripple current" pamtengo wa DC. capacitor ESR idzatulutsa linanena bungwe voteji ripple.Ngati ichi ndi chizindikiro chofunika kwambiri, ndi capacitor ndi ESR ake zokhazikika ndi kukula kapena mtengo, izi zikhoza kukhazikitsa ripple panopa ndi inductance mtengo.
Kawirikawiri kusankha kwa capacitors kumapereka kusinthasintha.Izi zikutanthauza kuti ngati ESR ili yochepa, phokoso lamakono likhoza kukhala lalitali.Komabe, izi zimayambitsa mavuto ake.Mwachitsanzo, ngati "chigwa" cha ripple ndi zero pansi pa katundu wina wopepuka, ndipo SW2 ndi diode, nthawi zonse, idzasiya kuchititsa panthawi ya kayendetsedwe kake, ndipo chosinthira chidzalowa mu "discontinuous conduction" mode. steady state.Modern buck converters zambiri ntchito synchronous rectification, kumene SW2 ndi MOSEFT ndipo akhoza kukhetsa panopa mbali zonse pamene anayatsidwa.Izi zikutanthauza kuti inductor akhoza kugwedezeka zoipa ndi kusunga conduction mosalekeza (Chithunzi 2).
Pachifukwa ichi, nsonga yapamwamba kwambiri ya ΔI ikhoza kuloledwa kukhala yapamwamba, yomwe imayikidwa ndi mtengo wa inductance malinga ndi ΔI = ET / LE ndi magetsi opangira magetsi omwe amagwiritsidwa ntchito panthawi ya T. Pamene E ndi mphamvu yotulutsa mphamvu , ndizosavuta kulingalira zomwe zimachitika pa nthawi yozimitsa Toff ya SW1.ΔI ndi yaikulu kwambiri panthawiyi chifukwa Toff ndi yaikulu kwambiri pamagetsi olowera kwambiri a ntchito yotumizira. V, kutulutsa kwa 3.3 V, kukwera kwapamwamba kwa 1 A, ndi kusinthasintha kwafupipafupi kwa 500 kHz, L = 5.4 µH. Izi zikuganiza kuti palibe kutsika kwa magetsi pakati pa SW1 ndi SW2. owerengedwera mu mawerengedwe awa.
Kufufuza mwachidule m'kabukhuku kungasonyeze mbali zambiri zomwe ziwerengero zawo zamakono zimagwirizana ndi katundu wofunikira. pa 0.5 A pamwamba pa katundu wamakono. Pali njira zosiyanasiyana zowunikira momwe mukugwiritsira ntchito inductor: monga malire a kutentha kwa matenthedwe kapena malire a maginito. ogwiritsidwa ntchito pa mafunde apamwamba ngati akhoza utakhazikika.Machulukitsidwe ayenera kupewedwa pa nsonga mafunde, ndipo malire adzachepa ndi kutentha.Ndikoyenera kuyang'ana mosamala inductance deta pepala pamapindikira kuti muwone ngati ndi malire ndi kutentha kapena machulukitsidwe.
Kutayika kwa inductance ndikofunikanso kuganizira.Kutayika kumakhala makamaka kutaya kwa ohmic, komwe kungathe kuwerengedwa pamene phokoso lamakono liri lochepa.Pazigawo zazikulu zowonongeka, zotayika zazikulu zimayamba kulamulira, ndipo zotayika izi zimadalira mawonekedwe a mawonekedwe a waveform komanso pafupipafupi ndi kutentha, kotero n'zovuta kulosera.Mayesero enieni ochitidwa pa prototype, chifukwa izi zingasonyeze kuti kutsika kwaposachedwa kwamakono ndikofunikira kuti pakhale ntchito yabwino kwambiri. ndondomeko.
TT Electronics 'high-performance HA66 series ndi chiyambi chabwino (Chithunzi 3) .Mtundu wake umaphatikizapo gawo la 5.3 µH, chiwerengero cha saturation cha 2.5 A, 2 A katundu wololedwa, ndi ripple ya +/- 0.5 A. Magawowa ndi abwino kwa magalimoto ogwiritsira ntchito magalimoto ndipo adalandira chiphaso cha AECQ-200 kuchokera ku kampani yomwe ili ndi makina ovomerezeka a TS-16949.
Izi zimachokera kuzinthu zoperekedwa ndi TT Electronics plc ndipo zawunikiridwa ndikusinthidwa.
TT Electronics Co., Ltd. (2019, October 29).Ma inductors amagetsi a DC-DC applications.AZoM.Retrieved from https://www.azom.com/article.aspx?ArticleID=17140 pa December 27, 2021.
TT Electronics Co., Ltd. "Power inductors for automotive DC-DC applications".AZoM.December 27, 2021..
TT Electronics Co., Ltd. "Power inductors for automotive DC-DC applications"
TT Electronics Co., Ltd. 2019. Magetsi opangira magetsi a DC-DC applications.AZoM, adawonedwa pa Disembala 27, 2021, https://www.azom.com/article.aspx?ArticleID=17140.
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