Hom hom inductors, feem ntau yog siv hauv computer hloov khoom siv hluav taws xob los lim cov hom electromagnetic cuam tshuam cov teeb liab. Nyob rau hauv lub rooj tsavxwm tsim, hom hom inductor kuj plays lub luag hauj lwm ntawm EMI filtering, uas yog siv los suppress lub sab nrauv hluav taws xob thiab emission ntawm electromagnetic tsis generated los ntawm high-ceev teeb liab kab.
Raws li ib qho tseem ceeb ntawm cov khoom sib nqus, inductors tau siv dav hauv cov hluav taws xob hluav taws xob hluav taws xob. Nws yog ib qho tseem ceeb tshaj plaws nyob rau hauv lub hwj chim circuits. Xws li electromagnetic relays nyob rau hauv industrial tswj cov cuab yeej thiab hluav taws xob fais fab ntsuas (watt-teev meters) nyob rau hauv lub hwj chim systems. Cov ntxaij lim dej ntawm cov tswv yim thiab cov zis kawg ntawm kev hloov cov khoom siv hluav taws xob, tuners ntawm TV tau txais thiab xa qhov kawg, thiab lwm yam yog txhua yam sib cais los ntawm inductors. Lub luag haujlwm tseem ceeb ntawm inductors nyob rau hauv hluav taws xob circuits yog: lub zog cia, lim, choke, resonance, thiab lwm yam. Nyob rau hauv lub hwj chim circuits, vim hais tias circuits cuam tshuam nrog lub zog hloov ntawm cov tam sim no loj los yog high voltages, inductors feem ntau yog "hom fais fab" inductors.
Precisely vim hais tias lub hwj chim inductor txawv ntawm cov teeb liab me me ua inductor, lub topology ntawm switching fais fab mov yog txawv thaum lub sij hawm tsim, thiab cov qauv tsim kuj muaj nws tus kheej yuav tsum tau, ua rau tsim teeb meem.Inductorsnyob rau hauv tam sim no lub hwj chim mov circuits yog tsuas yog siv rau lim, lub zog cia, lub zog hloov, thiab lub hwj chim yam kho. Inductor tsim npog ntau yam ntawm kev paub xws li electromagnetic txoj kev xav, cov khoom sib nqus, thiab cov cai tswj kev nyab xeeb. Cov neeg tsim qauv yuav tsum muaj kev nkag siab meej txog kev ua haujlwm thiab cov kev xav tau ntsig txog (xws li tam sim no, voltage, zaus, kub nce, khoom siv, thiab lwm yam) los txiav txim siab. Qhov tsim nyog tshaj plaws.
Kev faib tawm ntawm inductors:
Inductors tuaj yeem muab faib ua ntau hom raws li lawv qhov kev thov ib puag ncig, cov qauv khoom, cov duab, siv, thiab lwm yam. Feem ntau, inductor tsim pib nrog kev siv thiab kev siv ib puag ncig raws li qhov pib. Hauv kev hloov khoom siv hluav taws xob, inductors tuaj yeem muab faib ua:
Hom Hom Choke
Power Factor Kho - PFC Choke
Hla-txuas txuas txuas inductor (Coupler Choke)
Lub zog cia smoothing inductor (Smooth Choke)
Sib nqus amplifier kauj (MAG AMP Coil)
Hom hom lim inductors xav tau ob lub coils kom muaj tus nqi inductance tib yam, tib lub impedance, thiab lwm yam, yog li hom inductors no txais cov qauv tsim, thiab lawv cov duab feem ntau yog TOROID, UU, ET thiab lwm yam duab.
Hom hom inductors ua haujlwm li cas:
Hom hom lim inductor kuj tseem hu ua hom hom choke coil (tom qab no hu ua hom hom inductor lossis CM.M.Choke) lossis Line Filter.
Hom hom lim inductors xav tau ob lub coils kom muaj tus nqi inductance tib yam, tib lub impedance, thiab lwm yam, yog li hom inductors no txais cov qauv tsim, thiab lawv cov duab feem ntau yog TOROID, UU, ET thiab lwm yam duab.
Hom hom inductors ua haujlwm li cas:
Hom hom lim inductor kuj tseem hu ua hom hom choke coil (tom qab no hu ua hom hom inductor lossis CM.M.Choke) lossis Line Filter.
Hauvswitching fais fab mov, vim yog qhov hloov pauv sai ntawm qhov tam sim no lossis qhov hluav taws xob hauv lub rectifier diode, lim capacitor thiab inductor, electromagnetic cuam tshuam qhov chaw (suab nrov) yog generated. Nyob rau tib lub sijhawm, kuj tseem muaj cov suab nrov zoo sib xws uas tsis yog lub zog zaus hauv cov khoom siv hluav taws xob. Yog tias cov kev cuam tshuam no tsis raug tshem tawm, Kev Txhaum Cai yuav ua rau muaj kev puas tsuaj rau cov khoom siv thauj khoom lossis lub zog hloov hluav taws xob nws tus kheej. Yog li ntawd, cov koom haum tswj hwm kev nyab xeeb hauv ntau lub tebchaws tau tshaj tawm cov cai ntawm kev cuam tshuam hluav taws xob (EMI) emissions.
cov cai tswj kev sib raug zoo. Tam sim no, kev hloov pauv ntawm cov khoom siv hluav taws xob hloov pauv tau nce siab, thiab EMI tau nce zuj zus. Yog li ntawd, EMI cov ntxaij lim dej yuav tsum tau nruab rau hauv cov khoom siv hluav taws xob hloov pauv. EMI cov ntxaij lim dej yuav tsum txwv ob qho tib si hom thiab hom suab nrov kom ua tau raws li qee qhov yuav tsum tau ua. txheem. Lub hom lim ib txwm yog lub luag haujlwm rau kev lim tawm qhov sib txawv hom cuam tshuam teeb liab ntawm ob kab ntawm cov tswv yim lossis cov zis kawg, thiab cov hom lim lim yog lub luag haujlwm rau kev lim tawm cov hom kev cuam tshuam cov teeb liab ntawm ob kab nkag. Qhov tseeb hom inductors tuaj yeem muab faib ua peb hom: AC CM.M.CHOKE; DC CM.M.CHOKE thiab SIGNAL CM.M.CHOKE vim qhov chaw ua haujlwm sib txawv. Lawv yuav tsum paub qhov txawv thaum tsim lossis xaiv. Tab sis nws txoj hauv kev ua haujlwm yog tib yam, raws li pom hauv daim duab (1):
Raws li pom nyob rau hauv daim duab, ob txheej coils nrog cov lus qhia rov qab raug mob ntawm tib lub nplhaib sib nqus. Raws li txoj cai ntawm txoj cai kauv raj txoj cai, thaum muaj qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv polarity thiab tib lub teeb liab amplitude yog siv rau cov khoom siv hluav taws xob A thiab B, Thaum , muaj ib qho tam sim no i2 qhia nyob rau hauv cov khoom kab, thiab cov hlau nplaum flux. Φ2 qhia nyob rau hauv cov khoom kab yog generated nyob rau hauv lub magnetic core. Raws li ntev raws li ob lub windings yog kiag li symmetrical, cov hlau nplaum fluxes nyob rau hauv ob qhov sib txawv cov lus qhia nyob rau hauv lub magnetic core rho tawm ib leeg. Tag nrho cov hlau nplaum flux yog xoom, lub kauj inductance yog yuav luag xoom, thiab tsis muaj impedance cuam tshuam rau lub teeb liab hom. Yog hais tias ib hom teeb liab uas muaj tib lub polarity thiab sib npaug amplitude yog siv rau lub input terminals A thiab B, yuav muaj ib tug tam sim no i1 qhia los ntawm cov dotted kab, thiab ib tug sib nqus flux Φ1 qhia los ntawm cov dotted kab yuav raug generated nyob rau hauv cov hlau nplaum. core, ces cov sib nqus flux nyob rau hauv cov tub ntxhais yuav Lawv muaj tib txoj kev coj thiab ntxiv dag zog rau ib leeg, yog li ntawd tus nqi inductance ntawm txhua kauj yog ob zaug ntawm thaum nws muaj nyob ib leeg, thiab XL = ωL. Yog li ntawd, lub kauj ntawm txoj kev winding no muaj kev cuam tshuam muaj zog ntawm kev cuam tshuam hom.
Qhov tseeb EMI lim yog tsim los ntawm L thiab C. Thaum tsim qauv, qhov sib txawv thiab hom kev tiv thaiv ib puag ncig feem ntau ua ke (raws li pom hauv daim duab 2). Yog li ntawd, tus tsim yuav tsum tau ua raws li qhov loj ntawm lub lim capacitor thiab cov cai tswj kev nyab xeeb uas yuav tsum tau ua. Cov qauv txiav txim siab txog cov nqi inductor.
Nyob rau hauv daim duab, L1, L2, thiab C1 tsim ib hom lim lim, thiab L3, C2, thiab C3 tsim ib hom lim lim.
Tsim ntawm Common Hom Inductor
Ua ntej tsim ib hom inductor, ua ntej xyuas tias lub kauj yuav tsum ua raws li cov hauv qab no:
1> Raws li kev ua haujlwm ib txwm muaj, cov tub ntxhais hlau nplaum yuav tsis saturated vim yog lub zog tam sim no.
2> Nws yuav tsum muaj qhov loj txaus impedance rau high-frequency interference signals, ib tug tej bandwidth, thiab ib tug yam tsawg kawg nkaus impedance rau lub teeb liab tam sim no ntawm lub khiav hauj lwm zaus.
3> Qhov kub coefficient ntawm lub inductor yuav tsum me me, thiab cov capacitance faib yuav tsum me me.
4> DC tsis kam yuav tsum tsawg li tsawg tau.
5> Lub induction inductance yuav tsum loj npaum li qhov ua tau, thiab tus nqi inductance yuav tsum ruaj khov.
6> Lub rwb thaiv tsev ntawm windings yuav tsum ua tau raws li qhov yuav tsum tau muaj kev nyab xeeb.
Common hom inductor tsim cov kauj ruam:
Kauj Ruam 0 SPEC tau txais: EMI tso cai qib, qhov chaw thov.
Kauj Ruam 1 Txiav txim siab tus nqi inductance.
Kauj Ruam 2 Cov khoom siv tseem ceeb thiab cov lus qhia tshwj xeeb raug txiav txim siab.
Kauj Ruam 3 Txiav txim seb tus naj npawb ntawm winding lem thiab hlau txoj kab uas hla.
Kauj Ruam 4 Ua pov thawj
Kauj ruam 5 Test
Cov qauv tsim
Kauj ruam 0: EMI lim Circuit Court raws li qhia hauv daim duab 3
CX = 1.0 Uf Cy = 3300PF EMI level: Fcc Class B
Hom: Ac Common Hom Choke
Kauj Ruam 1: Txiav txim siab qhov inductance (L):
Nws tuaj yeem pom los ntawm daim duab kos duab uas cov teeb liab hom teeb liab raug tshem tawm los ntawm cov lim hom uas muaj L3, C2, thiab C3. Qhov tseeb, L3, C2, thiab C3 tsim ob lub LC series circuits, uas nqus cov suab nrov ntawm L thiab N kab ntsig. Ntev npaum li qhov kev txiav tawm zaus ntawm lub lim lim tau txiav txim siab thiab qhov capacitance C paub, qhov inductance L tuaj yeem tau txais los ntawm cov qauv hauv qab no.
fo = 1/(2π√LC)L → 1/(2πfo)2C
Feem ntau EMI xeem bandwidth yog raws li nram no:
Kev cuam tshuam: 150KHZ → 30MHZ (Ceeb Toom: VDE tus qauv 10KHZ - 30M)
Kev cuam tshuam hluav taws xob: 30MHZ 1GHZ
Lub lim dej tiag tiag tsis tuaj yeem ua tiav qhov nkhaus impedance ntawm cov lim zoo tagnrho, thiab feem ntau qhov kev txiav tawm tuaj yeem raug teeb tsa nyob ib puag ncig 50KHZ. Ntawm no, piv txwv li fo = 50KHZ, ces
Luas = 1/(2πfo)2C = 1/ [(2*3.14*50000)2*3300*10-12] = 3.07mH
L1, L2, thiab C1 tsim ib hom lim (low-pass) ib txwm lim. Lub capacitance ntawm kab yog 1.0uF, yog li cov hom inductance yog:
L = 1/ [(2*3.14*50000)2*1*10-6] = 10.14uH
Nyob rau hauv no txoj kev, theoretical xav tau inductance tus nqi yuav tau. Yog tias koj xav kom tau txais qhov kev txiav tawm qis dua fo, koj tuaj yeem ua kom tus nqi inductance ntxiv. Qhov kev txiav tawm zaus feem ntau tsis tsawg dua 10KHZ. Raws li txoj cai, qhov siab dua qhov inductance, qhov zoo dua EMI kev cuam tshuam, tab sis qhov siab inductance ntau dhau yuav ua rau qhov kev txiav tawm qis dua, thiab cov lim tiag tiag tsuas tuaj yeem ua tiav qee qhov broadband, uas ua rau muaj kev cuam tshuam ntawm lub suab nrov nrov (feem ntau. Lub suab nrov ntawm cov khoom siv hluav taws xob hloov pauv yog li 5 ~ 10MHZ, tab sis muaj cov xwm txheej uas nws tshaj 10MHZ). Tsis tas li ntawd, qhov siab dua qhov inductance, qhov ntau tig winding muaj, los yog siab dua qhov ui ntawm CORE, uas yuav ua rau qhov tsawg zaus impedance nce (DCR yuav loj dua). Raws li tus naj npawb ntawm cov lem nce, qhov faib capacitance kuj nce (raws li qhia hauv daim duab 4), tso cai rau tag nrho cov high-frequency tam sim no ntws los ntawm no capacitance. UI siab dhau heev ua rau CORE yooj yim saturated, thiab nws kuj yog ib qho nyuaj heev thiab kim heev los tsim.
Kauj Ruam 2 Txiav txim siab CORE cov khoom thiab SIZE
Los ntawm cov qauv tsim los saum toj no, peb tuaj yeem paub tias hom hom inductor yuav tsum nyuaj rau saturate, yog li nws yuav tsum xaiv cov khoom siv nrog lub kaum sab xis BH qis. Vim tias tus nqi inductance ntau dua yuav tsum tau, tus nqi ui ntawm cov tub ntxhais hlau nplaum kuj yuav tsum siab, thiab nws kuj yuav tsum muaj nrog cov tub ntxhais qis dua thiab siab dua Bs tus nqi, Mn-Zn ferrite cov khoom CORE yog tam sim no cov khoom siv CORE uas tsim nyog tshaj plaws. saum toj no cov cai.
Tsis muaj qee yam kev cai ntawm COEE SIZE thaum tsim. Nyob rau hauv txoj cai, nws tsuas yog yuav tsum tau ua kom tau raws li qhov yuav tsum tau inductance thiab txo qhov luaj li cas ntawm cov khoom tsim nyob rau hauv qhov kev tso cai tsawg zaus poob ntau.
Yog li ntawd, CORE cov ntaub ntawv thiab SIZE extraction yuav tsum tau soj ntsuam raws li tus nqi, tso cai poob, installation qhov chaw, thiab lwm yam. Qhov feem ntau siv CORE tus nqi ntawm hom hom inductors yog nyob nruab nrab ntawm 2000 thiab 10000. Iron Powder Core kuj muaj cov hlau tsis muaj hlau, siab Bs thiab qis. BH lub kaum sab xis piv, tab sis nws cov ui yog tsawg, yog li nws feem ntau tsis siv nyob rau hauv hom hom inductors, tab sis hom tub ntxhais no yog ib qho ntawm cov hom inductors. Cov ntaub ntawv nyiam.
Kauj Ruam 3 Txiav txim seb tus lej hloov N thiab txoj kab uas hla dw
Ua ntej txiav txim siab qhov tshwj xeeb ntawm CORE. Piv txwv li, hauv qhov piv txwv no, T18 * 10 * 7, A10, AL = 8230 ± 30%, ces:
N = √L / AL = √(3.07 * 106) / (8230 * 70%) = 23 TS
Txoj kab uas hla yog nyob ntawm qhov ceev tam sim no ntawm 3 ~ 5A / mm2. Yog tias qhov chaw tso cai, qhov ceev tam sim no tuaj yeem xaiv tsawg li tsawg tau. Piv txwv tias cov tswv yim tam sim no kuv = 1.2A hauv qhov piv txwv no, coj J = 4 A / mm2
Tom qab ntawd Aw = 1.2 / 4 = 0.3 mm2 Φ0.70 mm
Qhov tseeb hom inductor yuav tsum tau kuaj los ntawm cov qauv tiag tiag kom paub meej tias qhov kev ntseeg tau ntawm tus qauv tsim, vim tias qhov sib txawv ntawm cov txheej txheem tsim khoom kuj tseem yuav ua rau muaj qhov sib txawv ntawm qhov inductor thiab cuam tshuam rau cov nyhuv lim. Piv txwv li, qhov nce ntawm kev faib tawm yuav ua rau muaj suab nrov nrov. Hloov tau yooj yim dua. Lub asymmetry ntawm ob lub windings ua rau qhov sib txawv ntawm inductance ntawm ob pawg loj, tsim ib qho impedance rau lub teeb liab hom.
Cov ntsiab lus
1> Lub luag haujlwm ntawm hom hom inductor yog lim tawm cov suab nrov hom hauv kab. Tus tsim yuav tsum tau hais tias ob windings muaj ib tug kiag li symmetrical qauv thiab tib yam hluav taws xob tsis.
2> Lub peev xwm faib tawm ntawm hom hom inductor muaj qhov cuam tshuam tsis zoo rau kev tawm suab nrov nrov thiab yuav tsum tau txo qis.
3> Tus nqi inductance ntawm hom hom inductor muaj feem xyuam rau lub suab nrov zaus band uas yuav tsum tau lim thiab qhov sib txuam capacitance. Tus nqi inductance feem ntau yog nruab nrab ntawm 2mH ~ 50 mH.
Cov ntaub ntawv qhov chaw: Reprinted los ntawm Internet
Xuange tau tsim nyob rau hauv 2009. Lubsiab thiab tsawg zaus transformers, inductors thiabLED tsav lub zog khoom sivcov khoom siv tau dav siv hauv cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, cov khoom siv hluav taws xob tshiab, cov khoom siv hluav taws xob LED thiab lwm yam lag luam.
Xuange Electronics nyiam lub koob npe nrov hauv kev lag luam hauv tsev thiab txawv teb chaws, thiab peb lees txaisOEM thiab ODM xaj.Txawm hais tias koj xaiv cov khoom lag luam txheem los ntawm peb cov ntawv teev npe lossis nrhiav kev pab nrog kev hloov kho, thov koj xav tham txog koj cov kev xav tau yuav nrog Xuange.
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Post lub sij hawm: May-28-2024