Ferrite sib nqus rings feem ntau suav nrog nickel-zinc ferrite magnetic rings thiab manganese-zinc ferrite magnetic rings, thiab ob hom sib nqus rings no muaj kev sib txawv nruj raws li kev siv ntau zaus. Nickel-zinc ferrite magnetic rings yog tsim rau suppressing electromagnetic cuam tshuam nyob rau hauv high-frequency bands; thaum manganese-zinc ferrite magnetic rings yog tsim rau suppressing electromagnetic cuam tshuam nyob rau hauv tsawg zaus bands.
Qhov siab dua qhov permeability ntawm ferrite, qhov ntau dua qhov impedance ntawm tsawg zaus thiab qhov me me ntawm impedance ntawm high frequencies. Cov txheej txheem sib txawv tuaj yeem raug xaiv los tsim cov nplhaib sib nqus raws li qhov xav tau sib txawv. Sib nqus rings muaj cov yam ntxwv impedance sib txawv ntawm ntau zaus, feem ntau nrog me me impedance ntawm tsawg zaus, thiab cov impedance nthuav tawm los ntawm lub nplhaib sib nqus nce sharply raws li lub teeb liab zaus nce.
Lub luag haujlwm ntawm Magnetic Rings:
Function 1:Rau ferrites siv los tiv thaiv electromagnetic cuam tshuam, qhov tseem ceeb tshaj plaws kev ua tau zoo tsis yog permeability μ thiab saturated sib nqus flux ceev Bs. Nws qhov sib npaug Circuit Court yog ib qho kev sib txuas ntawm ib qho inductor thiab resistor, thiab qhov tseem ceeb ntawm ob qho tib si yog proportional rau qhov ntev ntawm cov hlaws. Thaum ib tug hlau hla los ntawm no ferrite core, qhov inductive impedance tsim nce raws li qhov zaus nce. High-frequency tam sim no dissipates nyob rau hauv daim ntawv ntawm tshav kub nyob rau hauv nws.
Muaj nuj nqi 2:Hauv qhov tsawg zaus, impedance yog tsim los ntawm inductive reactance. Ntawm qhov tsawg zaus, R yog qhov me me, thiab qhov sib nqus permeability ntawm cov tub ntxhais sib nqus yog siab, uas ua rau muaj tus nqi inductance loj, qhov L ua lub luag haujlwm tseem ceeb. Electromagnetic cuam tshuam yog cuam tshuam thiab cuam tshuam, thiab qhov poob ntawm cov tub ntxhais hlau nplaum me me nyob rau lub sijhawm no. Tag nrho cov cuab yeej yog qhov tsawg-tsawg, high-Q inductive tivthaiv. Nyob rau hauv lub high-frequency range, impedance yog tsim los ntawm resistive Cheebtsam. Raws li qhov zaus nce, qhov sib nqus permeability ntawm cov tub ntxhais hlau nplaum yuav txo qis, ua rau txo qis hauv inductance thiab inductive reactance Cheebtsam. Thaum lub sij hawm no, qhov poob ntawm cov hlau nplaum tseem ceeb nce, thiab cov khoom tiv thaiv resistive nce, ua rau muaj kev nce hauv tag nrho impedance. Thaum cov teeb liab ntau zaus dhau los ntawm ferrite, electromagnetic cuam tshuam yog absorbed thiab dissipated nyob rau hauv daim ntawv ntawm thermal zog.
Function 3:Sib nqus rings nqus cov khoom siv ntau zaus, tseem hu ua cov lim dej nqus. Cov ntxaij lim dej zoo ib yam yog tsim los ntawm cov khoom tsis muaj kev cuam tshuam, tseem hu ua cov ntxaij lim dej. Thaum lub teeb pom kev zoo tsis sib haum rau impedance ntawm lub teeb liab qhov chaw, ib feem ntawm lub zog yuav raug xa rov qab mus rau lub teeb liab, uas ua rau muaj kev cuam tshuam ntau ntxiv. Txhawm rau hais txog qhov tsis zoo no, cov hlaws ferrite tuaj yeem siv rau ntawm cov kab nkag ntawm lub lim kom siv lawv cov kev poob tam sim no rau cov teeb liab zaus, hloov cov khoom siv hluav taws xob ntau rau hauv cov hluav taws xob poob.