【正文】 該逆變電源幾乎可以替代目前市場上所售的各種逆變器或者逆變電源產(chǎn)品，其應用前景 十分廣闊。 該逆變電源可將電瓶的 12V直流電轉換為 220V/50Hz 的交流電，供數(shù)碼相機、 CD 機、 MD 唱機、筆記本電腦、小型錄像機、電動剃須刀、手機等便攜式產(chǎn)品使用。因此具有相當強的通用性。 22 謝 辭 經(jīng)過兩個多月來的資料收集，分析、整理、方案修改、確定，到設計論述的撰寫，到現(xiàn)在基本完成了所有畢業(yè)設計的項目 — 這個漫長的過程，當然是辛苦的，不過，從個人角度來說，這個更是我大學本科四年一次對自己專業(yè)能力的總結和升華，畢業(yè)設計論文完結，這也意味著我在洛陽理工學院學習生活奮斗的生涯也即將結束。 在這里，我要感謝老師的精心培養(yǎng)和教導，同學們得支持和鼓勵。 首先，我要特別感謝我的導師辛伊 波老師，嚴謹細致、一絲不茍的作風一直是我工作、學習中的榜樣，他循循善誘的教導和不拘一格的思路給予我無盡的啟迪。 還要感謝大學教導過的的所有老師，感謝他們對我的辛勤教育，讓我在這四年里如沐春風。 感謝我的室友們，四年了，仿佛昨天還剛到學校被分到一個宿舍。四年里，我們沒有紅過臉，沒有吵過嘴，我們是嘴和睦的模范宿舍！只是今后大家就難得再聚在一起，沒關系，各奔前程，朝著幸福的大道奔去，大家珍重、我們在一起的日子，我會記一輩子的 。 在論文即將完成之際，我的心情無法平靜，從開始進入課題到論文的順利完成，有多少可敬的師長、同學、朋友給我無言的幫助，在這里請接收我誠摯的謝意 ! 23 附錄 A 整機原理圖 24 25 附錄 B 元件參數(shù)表 裝配位號 裝配參數(shù) 裝配位號 裝配參數(shù) C1 22μ F/16V C2 47μ F /16V C3 47μ F/16V C4 4700pF C5 2200μ F/16V C6 47μ F/16V C7 47μ F/16V C8 F C9 F C10 F C11 F C12 10μ F/400V C14 F/1000V C13 10μ F/50V VD1~VD4 1N4148 C15 10μ F/50V VD9~VD11 1N4148 VD5~D8 HER306 VD13 1N4148 VD12 FR107 DZ1 15V/ VD14 FR107 IC IC2 TL494CN DZ2 30V/ VT VT3 8550 LED 綠色 Ф3 VT VT8 KSP44 VT VT4 IRF3205 VT VT10 IRF740 VT VT7 IRF740 R2 39K R1 36K R4 270 R3 100K R6 R5 100K R8~R11 R7 R13 10K R12 470K R15 10K R14 220K R1 R18 1K R16 R20 R19 R22 10K R21 1K R25 1K R2 R24 R27 R26 16K 26 附錄 C 元件參數(shù)表 裝配位號 裝配參數(shù) 裝配位號 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 PCB 板 (兩面 ) 28 29 參考文獻 [1] 周志敏 , 周紀海，紀愛華．現(xiàn)代開關電源控制電路設計及應用[M]．北京：人民郵電出版社， 2021： 124147． [2] 康華光，陳大欽．電子技術基礎（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．電子技術基礎（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，陳健．高頻電子線路［Ｍ］．北京：高等教育出版社， 2021： 9597． [5] 何希才．新型電子電路應 用實例 [M]．北京：科學出版社， 2021：2226， 241245． [6] 都永超，朱漢林．無線電（期刊） [J]．北京：人民郵電出版社． 2021年 11 月總第 518 期． 4850． [7] 黃燕．常用電子設備開關電源檢修方法 [M]．北京：科學出版社，2021： 3038， 84， 94， 154． [8] 李瀚蓀．電路分析基礎（第 3 版） [M]．北京：高等教育出版社，1993： 5155． [9] 《日英漢無線電技術詞典》編輯組．日英漢無線電技術詞典 [Z]．北京：國防工業(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計教程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 .機械工業(yè)出版社， 2021:132133. [12] 清華大學電子學教研組，華成英，童詩白 .模擬電子技術基礎 .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（第 3 版） .北京：機械工業(yè)出版社， 1994:124. [14] 趙良炳 ． 現(xiàn)代電力電子技術基礎 .北京：清華大學出版社，1995:23,45. [15] 李序葆，趙永健 ． 電力電子器件及其應用 .北京：機械工業(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 sou