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.
上傳時間： 2013-11-16
上傳用戶：萍水相逢
西門子建筑電器-電氣安裝技術部發行的各類產品樣本：小型斷路器、剩余電流保護斷路器和模數化產品(中/ 英文)Miniature Circuit-Breakers, Residual Current Operated Circuit-Breakers and Modular Devices (Chinese/English)低壓熔斷器系統(中/ 英文)Fuse System (Chinese/English)雷擊，過電壓－不再是問題(中文)Thunderstorms - no problem (Chinese)西門子建筑電器目錄(中文)Electrical Installation Technology Catalog (Chinese)終端配電保護產品(中文)5 IN 1 (Chinese)SIKUS 和 STAB UNIVERSAL 目錄(中文)SIKUS and STAB UNIVERSAL Catalogue (Chinese)SIKUS HC 目錄(中文)SIKUS HC Catalogue (Chinese)SentronTM 母線槽 (中文)SentronTM Busway System (Chinese)SentronTM 母線槽系統快速選型 (準備中) (中文)SentronTM Busway System quick selection (in preparing) (Chinese)建筑低壓配電一體化解決方案－住宅小區應用(中文)Building LV PD Solution (Chinese)西門子 DELTA vista“遠景”系列開關和插座價目表(中文)Delta vista Switch and Socket Pricelist (Chinese)instabus EIB 面向未來的樓宇智能控制系統(中文)instabus EIB (Chinese)instabus EIB 面向未來的樓宇智能控制系統技術手冊 (準備中) (中文)instabus EIB technical handbook (in preparing) (Chinese)西門子電氣安裝技術業績卓越(中/ 英文)ET Reference Manual (Chinese/English)
上傳時間： 2013-11-23
上傳用戶：瓦力瓦力hong
在Multisim 10軟件環境下，設計一種由運算放大器構成的精確可控矩形波信號發生器，結合系統電路原理圖重點闡述了各參數指標的實現與測試方法。通過改變RC電路的電容充、放電路徑和時間常數實現了占空比和頻率的調節，通過多路開關投入不同數值的電容實現了頻段的調節，通過電壓取樣和同相放大電路實現了輸出電壓幅值的調節并提高了電路的帶負載能力，可作為頻率和幅值可調的方波信號發生器。Multisim 10仿真分析及應用電路測試結果表明，電路性能指標達到了設計要求。 Abstract: Based on Multisim 10， this paper designed a kind of rectangular-wave signal generator which could be controlled exactly composed of operational amplifier， the key point was how to implement and test the parameter indicators based on the circuit diagram. The duty and the frequency were adjusted by changing the time constant and the way of charging and discharging of the capacitor， the width of frequency was adjusted by using different capacitors provided with multiple switch， the amplitude of output voltage was adjusted by sampling voltage and using in-phase amplifier circuit，the ability of driving loads was raised， the circuit can be used as squarewave signal generator whose frequency and amplitude can be adjusted. The final simulation results of Multisim 10 and the tests of applicable circuit show that the performance indicators of the circuit meets the design requirements.
上傳時間： 2014-01-21
上傳用戶：shen007yue
ATmega8 taillight circuitAn assembly language program that generates 5 different static patterns with switching from pattern-to-pattern controlled by the depression of one push-button switch (S2).
標簽： taillight circuitAn generates different
上傳時間： 2014-01-12
上傳用戶：wanghui2438
/*[原創]一個樹形多級菜單參考程序 這是一個用于車載電話的菜單程序,可以看成是手機功能菜單的簡化板. 我所認為的樹形多級菜單是指:在一個父菜單項目下面有多個子菜單, 子菜單下面又有多個孫菜單...,進入下層菜單主要依*當前選中的索引.有點象文件的目錄結構. 本木從前實現這類的菜單主要*分層的switch語句,每層都是一個switch.但當我看到曉奇大俠的 程序和耳朵灌滿lq等人的爭論后,那時那地,我的心境變化了,我意識到指針代表了先進的生產力, 代表了社會的發展方向,是建設和諧社會的必要條件.不管你用了多長時間C語言,只要你不善于用 一個小針指來指去,你就是那種"用嘴吃飯的高貴騎士,決不用屁股裝彈步槍"的守舊分子和社會發 展的絆腳石.(跑題太遠,刪去1萬字...打住) .言歸正傳,下面的程序適用CPU為Mega16,編譯器為CVAVR 1.24.4a 由于按鍵數目較多,所以按鍵程 序把按鍵事件分為數字鍵,快捷鍵,確認鍵,取消鍵,上下翻鍵幾類,以減小菜單結構的容量.一下菜單 數據在菜單結構數組中的偏移量,有多少個菜單象就有多少個宏定義*/
上傳時間： 2013-11-28
上傳用戶：tianyi223
排序算法、字典和B-樹的C++語言實現 代碼內容 包括以下算法： qui.c sort: quicksort qsort.c sort: qsort ins.c sort: insert sort shl.c sort: shell sort has.c dictionary: hash tables bin.c dictionary: binary tree rbt.c dictionary: red-black trees skl.c dictionary: skip lists ext.c external sort btr.c btree 語言 C++ 編譯平臺 Visual C++ 作者 Thomas Niemann 備注 來自Sorting and Searching Algorithms:A Cookbook
標簽： sort qsort quicksort insert
上傳時間： 2013-12-15
上傳用戶：silenthink
The program SPLAY is a pascal to C translation of a program that Kim Kokkonen wrote in Turbo Pascal to implement Splay Trees. This program compresses and decompresses files, and does a pretty good job of it. Contents: SPLAY.PAS Original TP source code SPLAY.C Translation of code to C SPLAY.EXE Compiled version of SPLAY.C (small model) README.DOC You are looking at it Read the comments at the beginning of SPLAY.C for more info.
標簽： program translation Kokkonen pascal
上傳時間： 2015-05-05
上傳用戶：rocwangdp
DES,MD5,ZLIB算法源代碼 文件列表： Adler32.cpp ArithDLL.cpp ArithDLL.def ArithDLL.dll ArithDLL.dsp ArithDLL.dsw ArithDLL.h ArithDLL.lib ArithDLL.ncb ArithDLL.opt ArithDLL.plg Arithzxz.h Arithzxz.h.BAK Compress.cpp CRC.cpp Deflate.cpp Deflate.h Des.cpp Des.h Infblock.cpp Infblock.h Infcodes.cpp Infcodes.h Inffast.cpp Inffast.h Inffixed.h Inflate.cpp Inftrees.cpp Inftrees.h Infutil.cpp Infutil.h md5.cpp md5.h ReadMe.txt StdAfx.cpp StdAfx.h String.cpp Trees.cpp Zlib.h Zutil.cpp Zutil.h
上傳時間： 2014-11-23
上傳用戶：bibirnovis
十部經典算法合集 .chm Fundamentals of Data Structures by Ellis Horowitz and Sartaj Sahni PREFACE CHAPTER 1: INTRODUCTION CHAPTER 2: ARRAYS CHAPTER 3: STACKS AND QUEUES CHAPTER 4: LINKED LISTS CHAPTER 5: TREES CHAPTER 6: GRAPHS CHAPTER 7: INTERNAL SORTING CHAPTER 8: EXTERNAL SORTING CHAPTER 9: SYMBOL TABLES CHAPTER 10: FILES APPENDIX A: SPARKS APPENDIX B: ETHICAL CODE IN INFORMATION PROCESSING APPENDIX C: ALGORITHM INDEX BY CHAPTER
標簽： Fundamentals Structures Horowitz PREFACE
上傳時間： 2015-05-19
上傳用戶：維子哥哥
Displays CPU time usage, the list of processes (can be terminated) and the task which are running (can be close or switch to). Plus a little net traffic monitor and a disk status report.
標簽： terminated the processes Displays
上傳時間： 2013-12-25
上傳用戶：zgu489
