摘要：電子設(shè)備之中雜亂的輻射或者能量叫做電磁干擾(EMI)。尤其是在開關(guān)電源中的電力電子轉(zhuǎn)換器經(jīng)常高速切換時，雖然提高了工作效率，卻導(dǎo)致轉(zhuǎn)換器產(chǎn)生了電磁干擾。在這篇論文之中介紹了各種各樣的傳導(dǎo)干擾，電磁干擾規(guī)章以及傳導(dǎo)性電磁干擾的測量。如果電子設(shè)備的電磁干擾符合國家或者國際規(guī)章稱為電磁兼容性（EMC）。電力電子系統(tǒng)生產(chǎn)商一定要重視電子設(shè)備的電磁兼容性。電磁兼容性評估的第一步就是建模和仿真。在這篇論文中提出了基于壓降型脈寬調(diào)制開關(guān)電源的電磁干擾仿真結(jié)果。為了提高電子設(shè)備的電磁兼容性,在論文中介紹了一些技術(shù)，并且通過仿真提高了電子設(shè)備的工作效率。
關(guān)鍵字：傳導(dǎo)，電磁兼容性，電磁干擾，線路阻抗穩(wěn)定網(wǎng)絡(luò)，開關(guān)電源
一.前言
在電力電子領(lǐng)域中，快速半導(dǎo)體的出現(xiàn)使高速度，高頻率的開關(guān)切換成為了可能[1]。高速的開關(guān)造成設(shè)備的重量和體積的減少，但與此同時這也造成了一些不利的影響，比如無線頻率的干擾[2]。生產(chǎn)商將生產(chǎn)的產(chǎn)品投放到市場，遵守電磁兼容性規(guī)章是必要的。在設(shè)計階段考慮電磁兼容性問題是非常重要的[3]。在開發(fā)產(chǎn)品前，建模和仿真是分析電磁兼容性最有效的工具。許多以前的研究都有涉及到電力電子元件的低頻分析[4~5]。不同類型的電力電子轉(zhuǎn)換器都能夠被用來當(dāng)做電磁的干擾源。電磁干擾源可以通過輻射和傳導(dǎo)兩種方式來傳播。線路阻抗穩(wěn)定網(wǎng)絡(luò)被用來測量和計算電磁干擾影響的程度[6]。線路阻抗穩(wěn)定網(wǎng)絡(luò)輸出的干擾頻譜被引為電磁兼容性的評估標(biāo)準(zhǔn)[7,~8]。國家或國際規(guī)章是電子設(shè)備電磁兼容性評估的一個參考的方面[7~8]。
二、來源，途徑和電磁干擾的受害者
Abstract:Undesired generation of radiated or conducted energy in electrical systems is called Electromagnetic Interference (EMI). High speed switching frequency in power electronics converters especially in switching power supplies improves efficiency but leads to EMI. Different kind of conducted interference, EMI regulations and conducted EMI measurement are introduced in this paper. Compliancy with national or international regulation is called Electromagnetic Compatibility (EMC). Power electronic systems producers must regard EMC. Modeling and simulation is the first step of EMC eva luation. EMI simulation results due to a PWM Buck type switching power supply are presented in this paper. To improve EMC, some techniques are introduced and their effectiveness proved by simulation.
Index Terms:Conducted, EMC, EMI, LISN, Switching Supply
I. INTRODUCTION
FAST semiconductors make it possible to have high speed and high frequency switching in power electronics . High speed switching causes weight and volume reduction of equipment, but some unwanted effects such as radio frequency interference appeared . Compliance with electromagnetic compatibility (EMC) regulations is necessary for producers to present their products to the markets. It is