【正文】 26 16K 26 附錄 C 元件參數(shù)表 裝配位號(hào) 裝配參數(shù) 裝配位號(hào) 裝配參數(shù) DCIN 12V/DC X AC 彈片插孔 Rt 150 T1 EI33 R2 R29 100K 27 附錄 D 整機(jī) PCB 板 (兩面 ) 28 29 參考文獻(xiàn) [1] 周志敏 , 周紀(jì)海，紀(jì)愛華．現(xiàn)代開關(guān)電源控制電路設(shè)計(jì)及應(yīng)用[M]．北京：人民郵電出版社， 2021： 124147． [2] 康華光，陳大欽．電子技術(shù)基礎(chǔ)（模擬部分）（第四版） [M]．北京：高等教育出版社， 1999： 37， 51， 5355， 57， 6870， 168170， 444470． [3] 康華光，鄒壽彬．電子技術(shù)基礎(chǔ)（數(shù)字部分）（第四版） [M]．北京：高等教育出版社， 2021： 3233， 197198． [4] 曾興雯，劉乃安，陳?。哳l電子線路［Ｍ］．北京：高等教育出版社， 2021： 9597． [5] 何希才．新型電子電路應(yīng) 用實(shí)例 [M]．北京：科學(xué)出版社， 2021：2226， 241245． [6] 都永超，朱漢林．無(wú)線電（期刊） [J]．北京：人民郵電出版社． 2021年 11 月總第 518 期． 4850． [7] 黃燕．常用電子設(shè)備開關(guān)電源檢修方法 [M]．北京：科學(xué)出版社，2021： 3038， 84， 94， 154． [8] 李瀚蓀．電路分析基礎(chǔ)（第 3 版） [M]．北京：高等教育出版社，1993： 5155． [9] 《日英漢無(wú)線電技術(shù)詞典》編輯組．日英漢無(wú)線電技術(shù)詞典 [Z]．北京：國(guó)防工業(yè)出版社， 1971： 258， 496， 761， 901． [10] 夏路易，石宗義 ．電路原理圖與電路板設(shè)計(jì)教程PROTEL99SE[M]．北京：北京希望電子出版社， 2021： 7279． [11] 王兆安 ， 黃俊 ． 電力電子技術(shù) .機(jī)械工業(yè)出版社， 2021:132133. [12] 清華大學(xué)電子學(xué)教研組，華成英，童詩(shī)白 .模擬電子技術(shù)基礎(chǔ) .北京：高等教育出版社， 2021:40,116. [13] 黃俊，王兆安 ． 電力電子變流技術(shù)（第 3 版） .北京：機(jī)械工業(yè)出版社， 1994:124. [14] 趙良炳 ． 現(xiàn)代電力電子技術(shù)基礎(chǔ) .北京：清華大學(xué)出版社，1995:23,45. [15] 李序葆，趙永健 ． 電力電子器件及其應(yīng)用 .北京：機(jī)械工業(yè)出版社， 1996:44,152,156. 30 外文資料翻譯 Modeling, Simulation, and Reduction of Conducted Electromagic Interference Due to a PWM Buck Type Switching Power Supply I A. Farhadi Abstract:Undesired generation of radiated or conducted energy in electrical systems is called Electromagic 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 Electromagic Compatibility (EMC). Power electronic systems producers must regard EMC. Modeling and simulation is the first step of EMC evaluation. 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 ??1 . High speed switching causes weight and volume reduction of equipment, but some unwanted effects such as radio frequency interference appeared ??2 . Compliance with electromagic patibility (EMC) regulations is necessary for producers to present their products to the markets. It is important to take EMC aspects already in design phase ??3 . Modeling and simulation is the most effective tool to analyze EMC consideration before developing the products. A lot of the previous studies concerned the low frequency analysis of power electronics ponents ??4 ??5 . Different types of power electronics converters are capable to be considered as source of EMI. They could propagate the EMI in both radiated and conduc ted 31 forms. Line Impedance Stabilization Network (LISN) is required for measurement and calculation of conducted interference level ??6 . Interference spectrum at the output of LISN is introduced as the EMC evaluation criterion ??7 ??8 . National or international regulations are the references for the evaluation of equipment in point of view of EMC ??7 ??8 . II. SOURCE, PATH AND VICTIM OF EMI Undesired voltage or current is called interference and their cause is called interference source. In this paper a highspeed switching power supply is the source of interference. Interference propagated by radiation in area around of an interference source or by conduction through mon cabling or wiring connections. In this study conducted emission is considered only. Equipment such as puters, receivers, amplifiers, industrial controllers, etc that are exposed to interference corruption are called victims. The mon connections of elements, source lines and cabling provide paths for conducted noise or interference. Electromagic conducted interference has two ponents as differential mode and mon mode ??9 . A. Differential mode conducted interference 32 This mode is related to the noise that is imposed between different lines of a test circuit by a noise source. Related current path is shown in Fig. 1 ??9 . The interference source, path impedances, differential mode current and load impedance are also shown in Fig. 1. B. Common mode conducted interference Common mode noise or interference could appear and impose between the lines, cables or connections and mon ground. Any leakage current between load and mon ground could be modeled by interference voltage source. Fig. 2 demonstrates the mon mode interference source, mon mode currents Icm1 and Ic m2 and the related current paths ??9 . The power electronics converters perform as noise source between lines of the supply work. In this study differential mode of conducted interference is particularly important and discussion will be continued considering this mode only. III. ELECTROMAGNETIC COMPATIBILITY REGULATIONS Application of electrical equipment especially static power electronic converters in different equipment is increasing more and more. As mentioned before, power electronics converters are considered as an important source of electromagic interference and have corrupting effects on the electric works 33 ??2 . High level of pollution resulting from various disturbances reduces the quality of power in electric works. On the other side some residential, mercial and especially medical consumers are so sensitive to power system disturbances including voltage and frequency variations. The best solution to reduc