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Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic institute and State Universityin partial fulfillment of the requirements for the degree of Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This work presents the modeling and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit model is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the model, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal models are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.
標(biāo)簽： EMI 開關(guān)電源 英文
上傳時間： 2013-11-16
上傳用戶：萍水相逢
lwIP is a small independent implementation of the TCP/IP protocol suite that has been developed by Adam Dunkels at the Computer and Networks Architectures (CNA) lab at the Swedish institute of Computer Science (SICS).
標(biāo)簽： implementation independent developed protocol
上傳時間： 2015-05-02
上傳用戶：windwolf2000
計算所漢語詞法分析系統(tǒng)ICTCLAS介紹 詞是最小的能夠獨立活動的有意義的語言成分。 但漢語是以字為基本的書寫單位，詞語之間沒有明顯的區(qū)分標(biāo)記，因此，中文詞語分析是中文信息處理的基礎(chǔ)與關(guān)鍵。為此,我們中國科學(xué)院計算技術(shù)研究所在多年研究基礎(chǔ)上，耗時一年研制出了漢語詞法分析系統(tǒng)ICTCLAS(institute of Computing Technology, Chinese Lexical Analysis System)，該系統(tǒng)的功能有：中文分詞；詞性標(biāo)注；未登錄詞識別。分詞正確率高達(dá)97%以上，未登錄詞識別召回率均高于90%，其中中國人名的識別召回率接近98%處理速度為31.5Kbytes/s。ICTCLAS的特色還在于：可以根據(jù)需要輸出多個高概率結(jié)果，有多種輸出格式，支持北大詞性標(biāo)注集，973專家組給出的詞性標(biāo)注集合。該系統(tǒng)得到了專家的好評，并有多篇論文在國內(nèi)外發(fā)表。 計算所漢語詞法分析系統(tǒng)ICTCLAS同時還提供一套完整的動態(tài)連接庫ICTCLAS.dll和相應(yīng)的概率詞典,開發(fā)者可以完全忽略漢語詞法分析，直接在自己的系統(tǒng)中調(diào)用ICTCLAS，ICTCLAS可以根據(jù)需要輸出多個高概率的結(jié)果，輸出格式也可以定制，開發(fā)者在分詞和詞性標(biāo)注的基礎(chǔ)上繼續(xù)上層開發(fā)。
上傳時間： 2014-01-02
上傳用戶：15736969615
wcdma的多徑環(huán)境下的上下行仿真，EITS標(biāo)準(zhǔn)，written by The Mobile and Portable Radio Research Group The Bradley rtment of Electrical and Computer Engineering Virginia Polytechnic institute and State University Blacksburg, Virginia
標(biāo)簽： wcdma 多徑環(huán)境 仿真
上傳時間： 2015-05-13
上傳用戶：225588
gprs協(xié)議棧代碼.所謂協(xié)議棧就是對信息進行多次封裝和解封的過程，以便能夠在不同的實體間傳送信息。本源代碼來自Indian institute of Technology
上傳時間： 2013-12-25
上傳用戶：Thuan
Delphi6.0函數(shù)大全，Delphi程序員的至愛。∷圖書簡介∷ 電子圖書名:Delphi6函數(shù)大全 Delphi6函數(shù)大全（1） <> 首部 function AnsiResemblesText(const AText, AOther: string): Boolean $[StrUtils.pas功能 返回兩個字符串是否相似說明 ANSI(American National Standards institute)美國國家標(biāo)準(zhǔn)協(xié)會 不區(qū)分大小寫參考 function StrUtils.SoundexProc var StrUtils.AnsiResemblesProc例子 CheckBox1.Checked := AnsiResemblesText(Edit1.Text, Edit2.Text)
上傳時間： 2016-01-25
上傳用戶：mikesering
UNDERSTANDING THE NEW U.S. NATIONAL SPACE POLICY，John M. Logsdon Director, Space Policy institute Elliott School of International Affairs The George Washington University Washington, DC, USA
標(biāo)簽： U.S. UNDERSTANDING NATIONAL POLICY
上傳時間： 2014-12-20
上傳用戶：蟲蟲蟲蟲蟲蟲
THE UNITED STATES AND HUMAN SPACE EXPLORATION，John M. Logsdon Director, Space Policy institute Elliott School of International Affairs The George Washington University Washington, DC, USA 在北大的講座資料
標(biāo)簽： EXPLORATION STATES UNITED HUMAN
上傳時間： 2016-03-06
上傳用戶：zycidjl
【下載說明】 這里提供給大家的是《Embedded Linux: Hardware, Software, and Interfacing》（嵌入式 Linux---硬件、軟件與接口）一書的英文原版CHM格式下載。 【作者簡介】 Craig Hollabaugh has been fascinated by electronics since he bought an AM radio in elementary school. He was first exposed to Unix during a cross-country talk session in 1985. Later, he administered networked Sun and DEC workstations while pursuing a doctoral degree in electrical engineering at Georgia institute of Technology. 【內(nèi)容提要】 本書通過一個冬季旅游勝地自動化管理項目實例，從軟件、硬件和接口的觀點介紹嵌入式Linux。引入項目需求后，作者講述了開發(fā)環(huán)境的建立，接著用一系列軟硬件接口實例展示了如何使用異步串行通信、PC并口、USB、內(nèi)存I/O、同步串行通信以及中斷，等等。最后介紹了將前面所有的工作有機地組織在一起的系統(tǒng)集成過程。本書以實際應(yīng)用為導(dǎo)向，書中整個項目的實施過程和軟硬件接口實例都具實踐指導(dǎo)意義。
標(biāo)簽： Linux Interfacing Embedded Hardware
上傳時間： 2014-01-22
上傳用戶：shus521
算法導(dǎo)論英文版 This book is one of a series of texts written by faculty of the Electrical Engineering and Computer Science Department at the Massachusetts institute of Technology. I
標(biāo)簽： Engineering Electrical of faculty
上傳時間： 2016-04-07
上傳用戶：123456wh
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