Li-inductors tsa mokhoa o tloaelehilenghangata li sebelisoa ho phepelong ea matla a komporo ho sefa mats'oao a tšitiso a motlakase a tloaelehileng. Ka moralo oa boto, inductor ea mokhoa o tloaelehileng e boetse e bapala karolo ea ho sefa EMI, e sebelisetsoang ho hatella mahlaseli a kantle le ho ntšoa ha maqhubu a motlakase a hlahisoang ke mela ea matšoao a lebelo le holimo.
E le karolo ea bohlokoa ea likarolo tsa makenete, li-inductors li sebelisoa haholo lipotolohong tsa elektroniki tsa matla. Ke karolo ea bohlokoa haholo lipotolohong tsa motlakase. Joalo ka li-relay tsa motlakase lisebelisoa tsa taolo ea indasteri le limithara tsa matla a motlakase (limithara tsa hora ea watt) litsamaisong tsa matla. Li-filters tse qetellong ea lisebelisoa tsa phepelo ea motlakase, li-tuner tsa TV tse amohelang le ho li fetisa, joalo-joalo, kaofela ha li arohane le li-inductors. Mesebetsi e ka sehloohong ea li-inductors lipotolohong tsa elektronike ke: polokelo ea matla, ho hloekisa, ho choke, resonance, joalo-joalo Lipotolohong tsa matla, kaha lipotoloho li sebetsana le phetisetso ea matla a maqhubu a maholo kapa maqhubu a phahameng, li-inductors hangata ke "mofuta oa matla".
Hantle-ntle hobane motlakase oa motlakase o fapane le mochine o monyenyane oa ho sebetsana le matšoao, topology ea phepelo ea motlakase e fapane nakong ea moralo, 'me mokhoa oa ho qapa o boetse o na le litlhoko tsa oona, o baka mathata a moralo.Li-inductorslipotolohong tsa phepelo ea motlakase tsa hajoale li sebelisoa haholo ho sefa, polokelo ea matla, phetiso ea matla, le tokiso ea lintlha tsa matla. Moralo oa inductor o akaretsa likarolo tse ngata tsa tsebo joalo ka theory ea electromagnetic, lisebelisoa tsa makenete le melaoana ea polokeho. Baqapi ba hloka ho ba le kutloisiso e hlakileng ea maemo a ho sebetsa le litlhoko tse amanang le parameter (tse kang hona joale, motlakase, maqhubu, ho phahama ha mocheso, thepa ea thepa, joalo-joalo) ho etsa liqeto. Moqapi o utloahalang ka ho fetisisa.
Mefuta ea li-inductors:
Li-inductors li ka aroloa ka mefuta e fapaneng ho latela tikoloho ea tsona ea ts'ebeliso, sebopeho sa sehlahisoa, sebopeho, tšebeliso, joalo-joalo Hangata, moralo oa inductor o qala ka ts'ebeliso le tikoloho ea ts'ebeliso e le qalo. Ha o fetola lisebelisoa tsa motlakase, li-inductors li ka aroloa ka:
Tloaelehileng Mode Choke
Tokiso ea Matla a Matla - PFC Choke
Inductor e kopantsoeng ka sefapano (Coupler Choke)
Inductor ea ho boloka matla (Smooth Choke)
Khoeli ea amplifier ea Magnetic (Mag AMP Coil)
Li-inductors tsa mofuta o tloaelehileng li hloka hore li-coil tse peli li be le boleng bo ts'oanang ba inductance, impedance e ts'oanang, joalo-joalo, kahoo mofuta ona oa li-inductors o nka meralo e lekanang, 'me libopeho tsa tsona hangata ke TOROID, UU, ET le libopeho tse ling.
Mokhoa o tloaelehileng oa li-inductors o sebetsa joang:
Inductor ea mokhoa o tloaelehileng o boetse o bitsoa common mode choke coil (eo ka mor'a moo e bitsoang common mode inductor kapa CM.M.Choke) kapa Line Filter.
Li-inductors tsa mofuta o tloaelehileng li hloka hore li-coil tse peli li be le boleng bo ts'oanang ba inductance, impedance e ts'oanang, joalo-joalo, kahoo mofuta ona oa li-inductors o nka meralo e lekanang, 'me libopeho tsa tsona hangata ke TOROID, UU, ET le libopeho tse ling.
Mokhoa o tloaelehileng oa li-inductors o sebetsa joang:
Inductor ea mokhoa o tloaelehileng o boetse o bitsoa common mode choke coil (eo ka mor'a moo e bitsoang common mode inductor kapa CM.M.Choke) kapa Line Filter.
Hoho fetola phepelo ea motlakase, ka lebaka la liphetoho tse potlakileng tsa hona joale kapa motlakase ho diode ea rectifier, filter capacitor le inductor, mehloli ea tšitiso ea motlakase (lerata) e hlahisoa. Ka nako e ts'oanang, ho boetse ho na le melumo e phahameng ea li-harmonic ntle le maqhubu a matla a matla a ho kenya letsoho. Haeba litšitiso tsena li sa felisoe, Khatello e tla baka tšenyo ea thepa ea thepa kapa phepelo ea motlakase ka boeona. Ka hona, mekhatlo e laolang ts'ireletso linaheng tse 'maloa e fane ka melaoana mabapi le tlhahiso ea motlakase oa motlakase (EMI).
melaoana ea taolo e tsamaellanang. Hajoale, ho fetoha ha phepelo ea motlakase ho ntse ho eketseha, 'me EMI e ntse e mpefala le ho feta. Ka hona, li-filters tsa EMI li tlameha ho kenngoa ho phepelong ea motlakase. Lisefe tsa EMI li tlameha ho hatella mokhoa o tloaelehileng le lerata le tloaelehileng ho fihlela litlhoko tse itseng. maemo. Sefefo se tloaelehileng se na le boikarabello ba ho sefa lets'oao la tšitiso la mokhoa oa phapang lipakeng tsa mela e 'meli pheletsong ea ho kenya kapa ea tlhahiso, 'me sefe se tloaelehileng se na le boikarabello ba ho sefa lets'oao le tloaelehileng la tšitiso lipakeng tsa mela e 'meli ea ho kenya. Li-inductors tsa 'nete tse tloaelehileng li ka aroloa ka mefuta e meraro: AC CM.M.CHOKE; DC CM.M.CHOKE le SIGNAL CM.M.CHOKE ka lebaka la libaka tse fapaneng tsa mosebetsi. Li lokela ho khetholloa ha ho etsoa moralo kapa ho khethoa. Empa molao-motheo oa eona oa ts'ebetso o ts'oana hantle, joalo ka ha ho bontšitsoe setšoantšong (1):
Joalokaha ho bontšitsoe setšoantšong, lihlopha tse peli tsa li-coil tse nang le mahlakoreng a fapaneng li entsoe ka lesale le tšoanang la makenete. Ho ea ka molao oa letsoho le letona la spiral tube, ha motlakase oa mokhoa oa ho khetholla o nang le polarity e fapaneng le amplitude e tšoanang ea pontšo e sebelisoa ho li-terminals tsa ho kenya A le B, Ha , ho na le i2 ea hona joale e bontšitsoeng moleng o tiileng, le phallo ea makenete. Φ2 e bontšitsoeng moleng o tiileng e hlahisoa mokokotlong oa makenete. Ha feela mapheo a mabeli a lekana ka ho felletseng, maqhubu a makenete a mahlakoreng a mabeli a fapaneng a konokono ea makenete a hlakola e 'ngoe. Kakaretso ea matla a khoheli ke zero, inductance ea coil e batla e le zero, 'me ha ho na phello ea impedance ho lets'oao la mokhoa o tloaelehileng. Haeba lets'oao la mokhoa o tloaelehileng le nang le polarity e tšoanang le amplitude e lekanang le sebelisoa ho li-terminals tsa ho kenya A le B, ho tla ba le i1 ea hajoale e bonts'itsoeng ke mola o nang le matheba, 'me phallo ea makenete Φ1 e bonts'itsoeng ke mohala oa matheba e tla hlahisoa ka matla a khoheli. konokono, ka nako eo matla a khoheli ka mokoting tla Ba na le tataiso e tšoanang le ho matlafatsa mong ho e mong, e le hore inductance boleng ba mong le e mong coil ke habeli ha e le mong, le XL = ωL. Ka hona, coil ea mokhoa ona oa matsoelintsoeke e na le phello e matla ea khatello ho tšitiso ea mokhoa o tloaelehileng.
Sesepa sa sebele sa EMI se entsoe ka L le C. Ha ho etsoa moralo, mokhoa o fapaneng le mekhoa e tloaelehileng ea ho hatella lipotoloho hangata li kopantsoe (joalokaha ho bontšitsoe setšoantšong sa 2). Ka hona, moralo o tlameha ho ipapisa le boholo ba filthara capacitor le melaoana e hlokahalang ea polokeho. Maemo a etsa liqeto mabapi le boleng ba inductor.
Setšoantšong, L1, L2, le C1 li theha filthara ea mokhoa o tloaelehileng, 'me L3, C2, le C3 li theha filthara e tloaelehileng.
Moralo oa Inductor ea Mokhoa o Tloaelehileng
Pele u rala inductor ea mokhoa o tloaelehileng, hlahloba pele hore na khoele e tlameha ho latela melaoana e latelang:
1 > Tlas'a maemo a tloaelehileng a ho sebetsa, motsoako oa makenete o ke ke oa tlala ka lebaka la motlakase oa motlakase.
2 > E tlameha ho ba le impedance e kholo e lekaneng bakeng sa matšoao a ho kena-kenana le maqhubu a phahameng, bandwidth e itseng, le ho fokotseha ho fokolang bakeng sa pontšo ea hona joale ka lebelo la ts'ebetso.
3 > Mocheso oa mocheso oa inductor o lokela ho ba o monyenyane, 'me matla a ajoang a lokela ho ba nyenyane.
4> Khanyetso ea DC e lokela ho ba nyane kamoo ho ka khonehang.
5> Induction inductance e lokela ho ba kholo ka hohle kamoo ho ka khonehang, 'me boleng ba inductance bo hloka ho tsitsa.
6 > The insulation pakeng tsa windings lokela ho finyella litlhoko tsa polokeho.
Mehato e tloaelehileng ea moralo oa inductor:
Mohato oa 0 Ho fumana SPEC: Boemo bo lumelletsoeng ba EMI, sebaka sa kopo.
Mohato oa 1 Fumana boleng ba inductance.
Mohato oa 2 Thepa ea mantlha le litlhaloso li khethoa.
Mohato oa 3 Fumana palo ea li-turning tse phethohang le bophara ba terata.
Mohato oa 4 Ho netefatsa
Mohato oa 5 Teko
Mehlala ea moralo
Mohato 0: EMI filthara potoloho joalokaha ho bontšitsoe Figure 3
CX = 1.0 Uf Cy = 3300PF EMI boemo: Fcc Sehlopha sa B
Mofuta: Ac Common Mode Choke
Mohato oa 1: Etsa qeto ea inductance (L):
E ka bonoa ho tsoa ho setšoantšo sa potoloho hore lets'oao le tloaelehileng le hatelloa ke filthara e tloaelehileng e entsoeng ka L3, C2 le C3. Ebile, L3, C2, le C3 li theha lipotoloho tse peli tsa letoto la LC, tse monyang lerata la mela ea L le N ka ho latellana. Hafeela lebelo le khaotsoeng la potoloho ea filthara le khethiloe 'me capacitance C e tsejoa, inductance L e ka fumanoa ka mokhoa o latelang.
fo= 1/(2π√LC)L → 1/(2πfo)2C
Hangata bandwidth ea tlhahlobo ea EMI e tjena:
Tšitiso e entsoeng: 150KHZ → 30MHZ (Hlokomela: VDE e tloaelehileng 10KHZ – 30M)
Tšitiso ea mahlaseli: 30MHZ 1GHZ
Sesefa sa 'nete ha se khone ho fihlela moepa o moepa oa sefahla se loketseng, 'me maqhubu a cutoff hangata a ka beoa ho 50KHZ. Mona, ho nka fo = 50KHZ, joale
L =1/(2πfo)2C = 1/ [( 2*3.14*50000)2 *3300*10-12] = 3.07mH
L1, L2, le C1 li theha filthara ea mokhoa o tloaelehileng oa (low-pass). Bokhoni bo pakeng tsa mela ke 1.0uF, kahoo mokhoa o tloaelehileng oa inductance ke:
L = 1/ [( 2*3.14*50000)2 *1*10-6] = 10.14uH
Ka tsela ena, boleng ba inductance bo hlokahalang ka theory bo ka fumanoa. Haeba u batla ho fumana sekhahla se tlase se khaotsoeng, u ka eketsa boleng ba inductance. Maqhubu a khaotsoeng hangata ha a ka tlase ho 10KHZ. Ka khopolo, ha inductance e phahame, e ntlafatsa phello ea khatello ea EMI, empa inductance e phahameng ka ho fetisisa e tla etsa hore sekhahla sa cutoff se theohe, 'me filthara ea sebele e ka finyella feela Broadband e itseng, e leng se etsang hore phello ea khatello ea lerata le phahameng e mpe le ho feta (ka kakaretso). Karolo ea lerata ea phepelo ea motlakase e ka bang 5 ~ 10MHZ, empa ho na le maemo moo e fetang 10MHZ). Ho phaella moo, ha inductance e phahame, ho na le ho fetoha ha maqhubu a mangata, kapa ho phahamisa ui ea CORE, e leng se tla etsa hore ho fokotseha ha maqhubu a tlaase ho eketsehe (DCR e ba kholoanyane). Ha palo ea ho chenchana e ntse e eketseha, matla a ajoang a boetse a eketseha (joalokaha ho bontšitsoe setšoantšong sa 4), ho lumella maqhubu ohle a phahameng-frequency hore a phalle ka matla ana. UI e phahameng haholo e etsa hore CORE e phethehe habonolo, hape ho thata haholo ebile ho bitsa chelete e ngata ho e hlahisa.
Mohato oa 2 Fumana lisebelisoa tsa CORE le SIZE
Ho tsoa ho litlhoko tse ka holimo tsa moralo, re ka tseba hore inductor ea mode e tloaelehileng e hloka ho ba thata ho e tlatsa, kahoo hoa hlokahala ho khetha thepa e nang le tekanyo e tlaase ea BH. Hobane boleng bo phahameng ba inductance bo hlokahala, boleng ba ui ba mantlha ea makenete le bona bo tlameha ho ba bo phahameng, hape bo tlameha ho ba le Ka tahlehelo e tlase ea mantlha le boleng bo phahameng ba Bs, Mn-Zn ferrite material CORE hajoale ke thepa e nepahetseng ka ho fetisisa ea CORE e kopanang le ka holimo litlhoko.
Ha ho na melao e itseng ho COEE SIZE nakong ea moralo. Ha e le hantle, e hloka feela ho kopana le inductance e hlokahalang le ho fokotsa boholo ba sehlahisoa se entsoeng ka har'a sebaka se amohelehang sa tahlehelo ea maqhubu a tlaase.
Ka hona, lisebelisoa tsa CORE le tlhahiso ea SIZE li lokela ho hlahlojoa ho latela litšenyehelo, tahlehelo e amohelehang, sebaka sa ho kenya, joalo-joalo Theko e tloaelehileng ea CORE ea li-inductors tse tloaelehileng li pakeng tsa 2000 le 10000. Iron Powder Core e boetse e na le tahlehelo e tlaase ea tšepe, Bs e phahameng le e tlaase. BH angle ratio, empa ui ea eona e tlase, kahoo hangata ha e sebelisoe ho li-inductors tse tloaelehileng, empa mofuta ona oa mantlha ke o mong oa li-inductors tse tloaelehileng. Lisebelisoa tse ratoang.
Mohato oa 3 Fumana palo ea li-turn N le bophara ba terata dw
Ntlha ea pele, fumana lintlha tsa CORE. Mohlala, mohlaleng ona, T18*10*7, A10, AL = 8230±30%, ebe:
N = √L / AL = √(3.07*106 ) / (8230*70%) = 23 TS
Bophara ba terata bo ipapisitse le boima ba hajoale ba 3 ~ 5A/mm2. Haeba sebaka se lumella, sekhahla sa hona joale se ka khethoa ka tlase kamoo ho ka khonehang. Nka hore hona joale ho kenya I i = 1.2A mohlaleng ona, nka J = 4 A/mm2
Joale Aw = 1.2 / 4 = 0.3 mm2 Φ0.70 mm
The inductor ea sebele ea mokhoa o tloaelehileng e tlameha ho lekoa ka lisampole tsa sebele ho netefatsa ho tšepahala ha moralo, hobane liphapang tsa mekhoa ea ho etsa lihlahisoa li tla boela li lebise ho phapang pakeng tsa li-inductor le ho ama phello ea ho sefa. Ka mohlala, ho eketseha ha capacitance e ajoang ho tla baka lerata le phahameng. Ho bonolo ho fetisa. Asymmetry ea li-winding tse peli e etsa hore phapang ea inductance pakeng tsa lihlopha tse peli e be kholoanyane, e etsa hore ho be le tšitiso e itseng ho letšoao la mokhoa o tloaelehileng.
Akaretsa
1 > Mosebetsi oa inductor ea mokhoa o tloaelehileng ke ho sefa lerata la mokhoa o tloaelehileng moleng. Moqapi o hloka hore mapheo a mabeli a be le sebopeho se lumellanang ka ho feletseng le li-parameter tse tšoanang tsa motlakase.
2 > Matla a ajoang a inductor ea mokhoa o tloaelehileng o na le tšusumetso e mpe ho hatellang lerata le phahameng la maqhubu 'me a lokela ho fokotsoa.
3 > Boleng ba inductance ba inductor ea mokhoa o tloaelehileng bo amana le sehlopha sa maqhubu a lerata se hlokang ho sefshoa le bokhoni bo tšoanang. Boleng ba inductance hangata bo pakeng tsa 2mH ~ 50 mH.
Mohloli oa sengoloa: E hatisitsoe hape ho tsoa Marang-rang
Xuange e thehiloe ka 2009. Theli-transformer tse phahameng le tse tlase, li-inductors leLisebelisoa tsa motlakase tsa LEDtse hlahisoang li sebelisoa haholo phepelong ea motlakase ea bareki, phepelo ea matla a indasteri, phepelo ea matla a macha, lisebelisoa tsa motlakase tsa LED le liindasteri tse ling.
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Nako ea poso: May-28-2024