本文關(guān)鍵詞：基于散射參數(shù)法的EMI濾波器電磁噪聲抑制效果預(yù)測　出處：《電工技術(shù)學(xué)報》2016年18期 　論文類型：期刊論文

  更多相關(guān)文章： EMI濾波器 差模噪聲 共模噪聲 阻抗不匹配 S參數(shù)

【摘要】：EMI濾波器是抑制傳導(dǎo)噪聲的重要手段之一,尤其是高性能的EMI濾波器的應(yīng)用,對電力電子設(shè)備的干擾具有很好的抑制作用�；趥鬏斁�理論得到并聯(lián)傳輸線的共模及差模參數(shù),通過推導(dǎo)和測試得到噪聲源阻抗、負載阻抗及其等效結(jié)構(gòu),求解得到基于阻抗法的插入損耗(IL)。但是,在高頻條件下,EMI濾波器及傳輸線不僅存在自寄生參數(shù),還存在互寄生參數(shù),這些互寄生參數(shù)很難通過阻抗法來等效。本文在傳輸線等效共模與差模參數(shù)頻率特性的基礎(chǔ)上,根據(jù)傳輸線理論得到噪聲源阻抗及負載阻抗;以共模濾波器為例,基于阻抗法預(yù)測濾波器對噪聲的衰減能力,并與實際測試值進行比較。然而,由于阻抗法不能很好地預(yù)測高頻條件下的噪聲衰減,本文以波的"入射與反射"為核心,進一步提出一種利用S參數(shù)來預(yù)測阻抗不匹配條件下噪聲衰減的方法,研究表明,散射參數(shù)法由于考慮了元件間的互寄生參數(shù),具有更好的高頻性能。
[Abstract]:EMI filter is one of the important methods to suppress conduction noise, especially the application of high performance EMI filter. Based on the transmission line theory, the common mode and differential mode parameters of the parallel transmission line are obtained, and the noise source impedance, load impedance and equivalent structure are derived and measured. The insertion loss based on impedance method is obtained. However, the EMI filter and transmission line have not only self-parasitic parameters, but also co-parasitic parameters at high frequency. These mutual parasitic parameters are difficult to be equivalent by impedance method. Based on the frequency characteristics of equivalent common mode and differential mode parameters of transmission line, the impedance of noise source and load impedance are obtained according to the theory of transmission line. Taking the common-mode filter as an example, the noise attenuation ability of the filter is predicted based on the impedance method, and compared with the actual test value. However, the impedance method can not predict the noise attenuation in the high frequency condition. Taking the incident and reflection of waves as the core, this paper proposes a method to predict the noise attenuation under the condition of impedance mismatch by using S parameters. The scattering parameter method has better high frequency performance because of considering the mutual parasitic parameters between elements.
【作者單位】： 江蘇省新能源發(fā)電與電能變換重點實驗室(南京航空航天大學(xué));
【基金】：國家自然科學(xué)基金(51177071) 臺達環(huán)境與教育基金會《電力電子科教發(fā)展計劃》(DREK2013004) 江蘇高校優(yōu)勢學(xué)科建設(shè)工程項目,南京航空航天大學(xué)研究生創(chuàng)新基地(實驗室)開放基金(kfjj201412) 中央高�；究蒲袠I(yè)務(wù)費專項資金資助項目
【分類號】：TN713
【正文快照】： 0引言根據(jù)國際電磁兼容標(biāo)準(zhǔn),所有的電力系統(tǒng)及電力電子設(shè)備的電磁干擾均需在所選標(biāo)準(zhǔn)線以下。在150k Hz~30MHz間主要是傳導(dǎo)干擾為主,而電磁干擾(Electromagnetic Interference,EMI)濾波器是抑制傳導(dǎo)干擾的主要手段之一[1],因此,設(shè)計合適的濾波器不僅有利于抑制噪聲,使其滿足抑，

本文編號：1433644