Peb txoj hauv kev ntawm Electromagnetic Interference Suppression rau Hloov Cov Khoom Siv Hluav Taws Xob
1. Tiv thaiv ntau yam khoom siv hluav taws xob cuam tshuam hauv kev hloov cov khoom siv hluav taws xob
Yuav kom daws tau qhov distortion ntawm input tam sim no waveform thiab txo cov harmonic cov ntsiab lus ntawm tam sim no, lub switching fais fab mov yuav tsum tau siv lub hwj chim factor kho (PFC) technology. PFC thev naus laus zis tso cai rau lub waveform tam sim no ua raws li qhov hluav taws xob waveform, kho qhov tam sim no waveform kom ze rau sine yoj. Yog li, cov ntsiab lus sib haum xeeb ntawm qhov tam sim no raug txo, cov yam ntxwv ntawm tus choj rectifier capacitor lim Circuit Court tau txhim kho, thiab lub zog ntawm cov khoom siv hluav taws xob hloov tau nce. Cov txheej txheem sib txawv tuaj yeem cuam tshuam electromagnetic cuam tshuam los ntawm qhov kev xav sib txawv, thiab Minrong Electric tau nqis peev ntau ntawm cov thev naus laus zis thiab kev siv zog hauv qhov no. Minrong Switching Power Supply tau ua tiav cov txiaj ntsig tseem ceeb hauv kev cuam tshuam electromagnetic cuam tshuam, thiab Minrong Electric txoj kev siv zog tau pov Minrong Switching Power Supply rau hauv txoj haujlwm tseem ceeb hauv kev lag luam.
Mos switching thev naus laus zis yog ib qho tseem ceeb txhais tau tias kom txo tau cov cuab yeej hloov pauv thiab txhim kho electromagnetic compatibility ntawm kev hloov khoom siv. Cov khoom siv hloov pauv tsim cov hluav taws xob hluav taws xob thiab cov hluav taws xob siab tshaj plaws thaum lub sij hawm hloov cov txheej txheem, uas yog lub ntsiab ua rau electromagnetic cuam tshuam thiab hloov pauv poob. Kev siv cov cuab yeej siv hluav taws xob hloov pauv hloov lub transistor ntawm xoom voltage thiab xoom tam sim no tuaj yeem cuam tshuam electromagnetic cuam tshuam. Kev siv cov kab hluav taws xob tsis zoo los nqus cov hluav taws xob siab kawg ntawm ob qho kawg ntawm lub raj hloov lossis lub tshuab hluav taws xob ntau zaus tuaj yeem txhim kho cov yam ntxwv ntawm electromagnetic compatibility.
Qhov teeb meem rov qab los ntawm cov zis rectifier diode tuaj yeem raug tshem tawm los ntawm serializing lub saturated inductor. Lub hauv paus ntawm lub saturated inductor yog ua los ntawm cov khoom sib nqus nrog lub voj voog BH nkhaus. Zoo li cov khoom siv hauv cov khoom siv sib nqus, cov inductance ua los ntawm cov tub ntxhais sib nqus no muaj qhov sib nqus permeability siab. Cov tub ntxhais hlau nplaum muaj ze li ntawm cov kab ncaj nraim ntawm BH nkhaus, ua kom yooj yim nkag mus rau hauv lub xeev saturated. Nyob rau hauv kev siv tswv yim, thaum lub tso zis rectifier diode yog nyob rau, lub saturated inductor ua hauj lwm nyob rau hauv lub inductance yam ntxwv lub xeev, sib npaug rau ib seem ntawm hlau; Thaum lub diode raug tua thiab thim rov qab, lub saturated inductance yog nyob rau hauv inductance yam ntxwv lub xeev, uas suppresses cov kev hloov tseem ceeb nyob rau hauv rov qab los tam sim no thiab sab nraud cuam tshuam.
2. Txiav tawm txoj kev sib kis ntawm Electromagnetic cuam tshuam - Tsim cov hom sib txawv thiab txawv hom fais fab kab lim
Lub tshuab lim fais fab tuaj yeem lim tawm cov kab hluav taws xob cuam tshuam. Lub lim EMI tsim nyog thiab ua tau zoo rau kev hloov pauv hluav taws xob yuav tsum muaj kev cuam tshuam muaj zog ntawm ob qho tib si kev cuam tshuam kev sib txawv thiab hom kev cuam tshuam. Qhov tseeb, nws tsis yog hais txog cov lim fais fab nkaus xwb. Minrong Electric kuj tau tsim txoj hauv kev los txhawm rau cuam tshuam electromagnetic cuam tshuam rau qee yam khoom, thiab cov neeg siv kev paub dhau los yog ib qho ntawm cov lus qhia Minrong Electric ua raws. Kev txhim kho thev naus laus zis ntawm Minrong Electric tsis tuaj yeem sib cais los ntawm nws txoj kev tsis hloov pauv, uas tau maj mam ua rau kev ua tiav ntawm kev ua haujlwm zoo hauv Minrong Switching Power Supply.
Hom hom inductance yog tsim los ntawm ob lub windings ntawm tib lub nplhaib sib nqus nrog cov lus qhia sib txawv thiab tib tus naj npawb ntawm lem. Feem ntau, lub voj voog sib nqus cores yog siv, uas tsis tshua muaj hlau nplaum to thiab ua haujlwm siab, tab sis winding yog qhov nyuaj. Thaum lub hwj chim zaus tam sim no ntawm lub nroog network ntws los ntawm ob lub windings, nws yog ib qho nyob rau hauv thiab ib qho tawm, thiab lub generated magnetic teb precisely offsets nws. Txoj kev no, hom hom inductance yuav tsis cuam tshuam lub zog zaus tam sim no ntawm lub nroog network, thiab tuaj yeem kis tau yam tsis muaj kev poob. Yog hais tias muaj ib hom suab nrov tam sim no dhau los ntawm hom hom inductance hauv lub nroog network, cov kev taw qhia ntawm hom suab nrov tam sim no yog tib yam. Thaum nws ntws los ntawm ob windings, lub generated magnetic teb yog superimposed nyob rau tib lub sij hawm, ua rau cov hom inductance muaj ib tug ntau dua inductive reactance rau cov cuam tshuam tam sim no, uas plays lub luag hauj lwm nyob rau hauv suppressing hom kev cuam tshuam.
3. Siv cov ntaub thaiv npog los txo qhov rhiab heev ntawm cov khoom siv hluav taws xob rhiab heev
Shielding yog ib txoj hauv kev zoo los txo cov suab nrov nrov. Cov ntaub ntawv uas muaj qhov zoo conductivity tuaj yeem siv los tiv thaiv hluav taws xob, thaum cov ntaub ntawv uas muaj qhov sib nqus permeability siab tuaj yeem siv los tiv thaiv cov hlau nplaum. Txhawm rau tiv thaiv transformer magnetic teb to thiab ua kom zoo thawj coupling, kaw lub nplhaib hlau nplaum yuav siv tau los tsim ib daim thaiv hlau nplaum. Piv txwv li, cov dej ntws tawm ntawm cov tuaj yeem ntaus cov tub ntxhais sib nqus yog me dua li ntawm e-type core. Kev sib txuas ntawm cov xov hlau thiab cov kab hluav taws xob ntawm cov khoom siv hluav taws xob hloov pauv yuav tsum siv cov neeg siv hluav taws xob nrog cov txheej thaiv tiv thaiv kom tsis txhob muaj kev cuam tshuam sab nraud los ntawm kev sib txuas rau hauv Circuit Court. Xwb, EMC cov khoom xws li cov hlaws sib nqus thiab cov nplhaib tuaj yeem siv los lim tawm cov kev cuam tshuam ntau zaus los ntawm lub zog thiab cov kab teeb liab. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias lub teeb liab zaus yuav tsum tsis txhob cuam tshuam los ntawm electromagnetic compatibility Cheebtsam, uas yog, lub teeb liab zaus yuav tsum nyob rau hauv lub lim. Tag nrho lub plhaub ntawm cov khoom siv hluav taws xob hloov pauv kuj yuav tsum muaj cov yam ntxwv tiv thaiv zoo, thiab cov pob qij txha yuav tsum ua kom tau raws li kev tiv thaiv kev tiv thaiv uas tau teev tseg los ntawm EMC. Los ntawm kev ua raws li cov kev ntsuas saum toj no, xyuas kom meej tias cov khoom siv hluav taws xob hloov pauv tsis cuam tshuam los ntawm kev cuam tshuam los ntawm cov khoom siv hluav taws xob sab nraud thiab yuav tsis cuam tshuam nrog cov khoom siv hluav taws xob sab nraud.
