Raws li kev khiav hauj lwm zaus ntawm cov neeg siv khoom siv hluav taws xob, cov khoom siv sib txuas lus, thiab cov khoom siv hluav taws xob tsheb txuas ntxiv mus ntxiv,electromagnetic cuam tshuam (EMI)tau dhau los ua qhov kev sib tw loj zuj zus. Cov10 MHz txog 600 MHzQhov ntau zaus yog qhov teeb meem tshwj xeeb. Siab - lub suab nrov tuaj yeem ua rau USB kev sib txuas lus tsis ua haujlwm, CAN lub tsheb npav poob, thiab tseem tiv thaiv cov khoom tsis dhauelectromagnetic compatibility (EMC)kev xeem ua raws cai.
IbTom ntej: EMI Ferrite Core yog ib qho ntawm cov pov thawj tshaj plaws thiab raug nqi - cov kev daws teeb meem zoo rau kev tiv thaiv hom no siab - nrov nrov. Nws pab txhim kho cov teeb liab kev ncaj ncees, txo cov electromagnetic cuam tshuam, thiab txhim kho tag nrho EMC kev ua tau zoo ntawm cov tshuab hluav taws xob.
Ib qho Kev Sib Tw Sib Tw rau Engineers
Xav txog tias koj tab tom debugging lub rooj tsav xwm tsim kho tshiab. Sai li qhovVariable zaus tsav (VFD)pib, nyob zePLCpib qhia ntau qhov kev sib txuas lus yuam kev. Kev ntsuam xyuas emissions qhia ntau lub suab nrov hauv lub30 MHz txog 100 MHzntau zaus.
Thawj qhov kev kho yog los nruab ib qhoEMI ferrite tub ntxhaisntawm lub cev muaj zog cable thiab ntxiv ibhom kev chokemus rau cov kab teeb liab. Txawm li cas los xij, cov tub ntxhais muaj ferrite tsis muab cov yam ntxwv zoo impedance, thiab qhov teeb meem tseem nyob. Tsuas yog tom qab hloov nws nrog ferrite core uas muajsiab dua impedance nyob rau hauv 50 MHz mus rau 100 MHz ntaupuas qhov cuam tshuam ploj mus.
Cov ntaub ntawv no qhia txog ib qho ntawm cov ntsiab cai tseem ceeb tshaj plaws thaum xaiv ib qhoEMI ferrite tub ntxhais: tsom rau qhov sib txuam zaus ntau dua li impedance ib leeg. Qhov zoo tshaj plaws ferrite core yog ib qho uas muab lub siab tshaj plaws impedance nyob rau hauv ntau zaus qhov chaw uas tsis xav tau lub suab nrov tshwm sim.
EMI Kev Sib Tw thiab Yuav daws Li Cas
Kev Sib Tw 1: Radiated Emissions tshaj qhov txwv hauv 100-300 MHz Range
Ua rau:
Siab - zaus harmonics tsim los ntawmsiab - ceev cov teeb liablos yoghloov cov khoom siv hluav taws xobfeem ntau yog thawj qhov chaw ntawm radiated EMI. Ntawm cov frequencies no, cov pa lim capacitors ua inductive thiab poob ntau ntawm lawv cov kev lim dej. Piv txwv li,Ni-Zn ferrite coresnthuav tawm cov impedance siab ntawm cov frequencies siab, tso cai rau lawv nqus thiab dissipate suab nrov zog zoo.
Cov tswv yim xaiv:
Xaiv Ni-Zn (Nickel-Zinc) ferrite cov khoom, uas muaj kev tiv thaiv siab thiab siab siab - zaus poob, zoo hloov siab - zaus suab nrov rau hauv tshav kub. CovSHINHOM R SeriesthiabRH SeriesEMI ferrite cores zoo haum rau cov ntawv thov hauv qhov ntau zaus.
Kev Sib Tw 2: Kev Ua Haujlwm Tsis Txaus Siab Ib puag ncig 30 MHz
Ua rau:
Thaum hloov cov cuab yeej qhib thiab tawm, lawv tsim cov hluav taws xob hluav taws xob uas nthuav tawm raws li lub zog cablescommon- hom tam sim no. Yog hais tias tus yam ntxwv impedance ntawm ferrite core los yog ib qho - hom choke tsis phim qhov cuam tshuam ntau zaus, EMI kev tawm tsam yuav raug txo.Rau suab nrov hauv10 MHz txog 100 MHzntau yam,Mn{0}}Zn (Manganese-Zinc)los yogNi-Zn ferrite cov ntaub ntawvnrog ib pib permeability (μi) ntawm 5,000-10,000 raug pom zoo.
Cov tswv yim xaiv:
CovSHINHOM RWW SeriesthiabR6H Series(xws liR6H-01rauR6H-07) muab cov nqi impedance teev ntawm25 MHzthiab100 MHz, ua kom yooj yim dua los xaiv qhov tsim nyog ferrite core rau koj daim ntawv thov.
Kev Sib Tw 3: Teeb Pom Kev Teeb Meem Tom Qab Txhim Kho Cov Tub Ntxhais Ferrite
Ua rau:
Teeb liab distortion tuaj yeem tshwm sim yog tias qhov kev txiav tawm zaus ntawm lub ferrite core qis dua lub teeb liab qhov tseem ceeb zaus, lossis yog tias qis tshaj - zaus inductance attenuates lub teeb liab xav tau. Qhov no tuaj yeem ua rau lub qhov muag kaw, cov teeb liab qeeb qeeb, thiab kev sib txuas lus tsis zoo.
Cov tswv yim xaiv:
Nco ntsoov xyuas qhov impedance -vim- zaus nkhaus. Lub ferrite core yuav tsum muab impedance qis ntawm lub teeb liab zaus thaum xa cov impedance siab nyob rau hauv lub suab nrov ntau zaus. Xav txog kev xaiv tus qauv qis dua -impedance los ntawmSHINHOM R6H Series, los yog siv ib qho -mode choke, uas nthuav tawm impedance qis rau qhov sib txawv- hom teeb liab thiab siab impedance rau hom - suab nrov.
Yuav Ua Li Cas Xaiv Txoj Cai EMI Ferrite Core
Cov lus hauv qab no muab cov lus qhia ceev rau xaiv qhov haum tshaj plawsSHINHOM EMI ferrite tub ntxhaisraws li kev siv cov xwm txheej sib txawv.
| Daim ntawv thov | Thawj Noise Frequency | Pom zoo Series | Qhov Zoo Tshaj Plaws |
|---|---|---|---|
| Power Line Filtering (Switching Power Supplies) | 10 MHz - 100 MHz | R6H Series(Axial Broadband Chokes) | Specified impedance tus nqi ntawm25 MHzthiab100 MHzrau qhov tseeb Circuit Court tsim thiab xaiv. |
| Siab -Speed Digital Signal Lines (USB, HDMI) | 100 MHz - 600 MHz | RH Series(Compact Ferrite Cores) | Ntau yam ntawm cov qauv nrog siab impedance ntawm100 MHz, zoo tagnrho rau kev tiv thaiv siab - zaus EMI. |
| General Signal thiab Ribbon Cable Lim | 10 MHz - 500 MHz | RWB Series(Qab-Hom Ferrite Cores rau Hlau thiab Flat Cables) | Haum rau nyias cov xov hlau thiab ribbon cables, nrog ntau qhov kev xaiv loj rau kev txhim kho yooj yim. |
| Siab-Tam sim no lossis loj-Txoj kab uas hla Cable Lim (VFDs, Cov Khoom Siv Hluav Taws Xob) | 1 MHz - 100 MHz | T Series(Toroidal Ferrite Cores) | Qhov loj sab hauv txoj kab uas hla haum rau cov cables tuab thiab txhawb nqa ntau txoj kab sib txuas kom nce qis - zaus impedance. |
| Qhov chaw-Cov khoom siv hluav taws xob txwv tsis pub siv | 10 MHz - 300 MHz | RH Series(Compact) thiabR Series | Qhov loj me me ua rau lawv yooj yim los ua ke rau hauv siab -cov qauv hluav taws xob ntom ntom. |
Xaus
Tus yuam sij los daws qhov siab - zaus EMI yog kom phim cov ferrite core rau lub suab nrov. Ua ntej, txheeb xyuas qhov zaus ntawm qhov tsis xav tau cuam tshuam. Tom qab ntawd, xaiv cov tub ntxhais ferrite uas muab cov impedance txaus nyob rau hauv qhov ntau zaus thaum ua kom nws lub cev qhov ntev ua tau raws li koj qhov yuav tsum tau ua.
SHINHOM muaj cov ntaub ntawv nthuav dav ntawm EMI ferrite cores, suav nrogR Series, RH Series, R6H Series, RWW Series, SMB4B Series, thiabToroidal ferrite cores. Txhua series yog txhawb los ntawm cov ncauj lus kom ntxaws impedance thiab dimensional specifications, ua cov khoom xaiv ncaj nraim rau ntau yam kev siv.
Thaum xaiv ib tug ferrite core rau siab - cov kab teeb liab ceev xws li USB thiab HDMI, impedance yuav tsum tsis yog tib qho kev xav xwb. Nws yog ib qho tseem ceeb sib npaug los ntsuas qhov kev poob qis kom ntseeg tau tias EMI muaj txiaj ntsig zoo yam tsis muaj kev cuam tshuam cov teeb liab kev ncaj ncees lossis ua rau muaj teeb meem cuam tshuam.
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