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SR-tree

  • 開(kāi)關(guān)磁阻電機(jī)驅(qū)動(dòng)系統(tǒng)發(fā)展概況(講座)

    本文介紹了開(kāi)關(guān)磁阻電機(jī)驅(qū)動(dòng)系統(tǒng)(Switched Reluctance Drive, SRD)的發(fā)展概況、系統(tǒng)構(gòu)成以及目前的研究熱點(diǎn)。 關(guān) 鍵 詞: 開(kāi)關(guān)磁阻電機(jī)   研究熱點(diǎn) Abstract:In this paper, development, construction and research focus of Switched Reluctance Drive were introduced. Keywords: Switched Reluctance Motor      Research focus 1  發(fā)展簡(jiǎn)介 開(kāi)關(guān)磁阻電機(jī)(Switched Reluctance Motor, SRM)最早可以追溯到1970年,英國(guó)Leeds大學(xué)步進(jìn)電機(jī)研究小組首創(chuàng)一個(gè)開(kāi)關(guān)磁阻電機(jī)雛形。到1972年進(jìn)一步對(duì)帶半導(dǎo)體開(kāi)關(guān)的小功率電動(dòng)機(jī)(10w~1kw)進(jìn)行了研究。1975年有了實(shí)質(zhì)性的進(jìn)展,并一直發(fā)展到可以為50kw的電瓶汽車(chē)提供裝置。1980年在英國(guó)成立了開(kāi)關(guān)磁阻電機(jī)驅(qū)動(dòng)裝置有限公司(SRD Ltd.),專(zhuān)門(mén)進(jìn)行SRD系統(tǒng)的研究、開(kāi)發(fā)和設(shè)計(jì)。1983年英國(guó)(SRD Ltd.)首先推出了SRD系列產(chǎn)品,該產(chǎn)品命名為OULTON。1984年TASC驅(qū)動(dòng)系統(tǒng)公司也推出了他們的產(chǎn)品。另外SRD Ltd. 研制了一種適用于有軌電車(chē)的驅(qū)動(dòng)系統(tǒng),到1986年已運(yùn)行500km。該產(chǎn)品的出現(xiàn),在電氣傳動(dòng)界引起不小的反響。在很多性能指標(biāo)上達(dá)到了出人意料的高水平,整個(gè)系統(tǒng)的綜合性能價(jià)格指標(biāo)達(dá)到或超過(guò)了工業(yè)中長(zhǎng)期廣泛應(yīng)用的一些變速傳動(dòng)系統(tǒng)。下表是當(dāng)時(shí)對(duì)幾種常用變速傳動(dòng)系統(tǒng)各項(xiàng)主要經(jīng)濟(jì)指標(biāo)所作的比較。成本 1.0 1.5 1.0 美國(guó)、加拿大、南斯拉夫、埃及等國(guó)家也都開(kāi)展了SRD系統(tǒng)的研制工作。在國(guó)外的應(yīng)用中,SRD一般用于牽引中,例如電瓶車(chē)和電動(dòng)汽車(chē)。同時(shí)高速性能是SRD的一個(gè)特長(zhǎng)的方向。據(jù)報(bào)道,美國(guó)為空間技術(shù)研制了一個(gè)25000r/min、90kW的高速SRD樣機(jī)。我國(guó)大約在1985年才開(kāi)始對(duì)SRD系統(tǒng)進(jìn)行研究。SRD系統(tǒng)的研究已被列入我國(guó)中、小型電機(jī)“八五”、“九五”和“十五”科研規(guī)劃項(xiàng)目。華中科技大學(xué)開(kāi)關(guān)磁阻電機(jī)課題組在“九五”項(xiàng)目中研制出使用SRD的純電動(dòng)轎車(chē),在“十五”項(xiàng)目中將SRD應(yīng)用到混合動(dòng)力城市公交車(chē),均取得了較好的運(yùn)行效果。紡織機(jī)械研究所將SRD應(yīng)用于毛巾印花機(jī)、卷布機(jī),煤礦牽引及電動(dòng)車(chē)輛等,取得了顯著的經(jīng)濟(jì)效益。 從上世紀(jì)90年代國(guó)際會(huì)議的上有關(guān)SRD系統(tǒng)的文章來(lái)看,對(duì)SRD系統(tǒng)的研究工作已經(jīng)從論證它的優(yōu)點(diǎn)、開(kāi)發(fā)應(yīng)用階段進(jìn)入到設(shè)計(jì)理論、優(yōu)化設(shè)計(jì)研究階段。對(duì)SR電機(jī)、控制器、功率變換器等的運(yùn)行理論、優(yōu)化設(shè)計(jì)、結(jié)構(gòu)形式等方面進(jìn)行了更加深入的研究。  

    標(biāo)簽: 開(kāi)關(guān)磁阻電機(jī) 發(fā)展 驅(qū)動(dòng)系統(tǒng) 講座

    上傳時(shí)間: 2013-10-11

    上傳用戶(hù):xjz632

  • LabVIEW for Everyone(經(jīng)典英文書(shū)籍)

    The #1 Step-by-Step Guide to labviewNow Completely Updated for labview 8!   Master labview 8 with the industry's friendliest, most intuitive tutorial: labview for Everyone, Third Edition. Top labview experts Jeffrey Travis and Jim Kring teach labview the easy way: through carefully explained, step-by-step examples that give you reusable code for your own projects!   This brand-new Third Edition has been fully revamped and expanded to reflect new features and techniques introduced in labview 8. You'll find two new chapters, plus dozens of new topics, including Project Explorer, AutoTool, XML, event-driven programming, error handling, regular expressions, polymorphic VIs, timed structures, advanced reporting, and much more. Certified labview Developer (CLD) candidates will find callouts linking to key objectives on NI's newest exam, making this book a more valuable study tool than ever. Not just what to d why to do it! Use labview to build your own virtual workbench Master labview's foundations: wiring, creating, editing, and debugging VIs; using controls and indicators; working with data structures; and much more Learn the "art" and best practices of effective labview development NEW: Streamline development with labview Express VIs NEW: Acquire data with NI-DAQmx and the labview DAQmx VIs NEW: Discover design patterns for error handling, control structures, state machines, queued messaging, and more NEW: Create sophisticated user interfaces with tree and tab controls, drag and drop, subpanels, and more Whatever your application, whatever your role, whether you've used labview or not, labview for Everyone, Third Edition is the fastest, easiest way to get the results you're after!

    標(biāo)簽: Everyone LabVIEW for 英文

    上傳時(shí)間: 2013-10-14

    上傳用戶(hù):shawvi

  • Complete support for EBNF notation; Object-oriented parser design; C++ output; Deterministic bottom-

    Complete support for EBNF notation; Object-oriented parser design; C++ output; Deterministic bottom-up "shift-reduce" parsing; SLR(1), LALR(1) and LR(1) table construction methods; Automatic parse tree creation; Possibility to output parse tree in XML format; Verbose conflict diagnostics; Generation of tree traverse procedures

    標(biāo)簽: Object-oriented Deterministic Complete notation

    上傳時(shí)間: 2014-11-29

    上傳用戶(hù):kr770906

  • 此軟件應(yīng)用了桌面表單

    此軟件應(yīng)用了桌面表單,自定義菜單,常用工具條,數(shù)據(jù)表加密,TREE等控件技術(shù)。新學(xué)者可以借鑒。人性與個(gè)性化的界面設(shè)計(jì),嘿嘿,還真值得一看

    標(biāo)簽: 軟件 表單

    上傳時(shí)間: 2015-01-18

    上傳用戶(hù):遠(yuǎn)遠(yuǎn)ssad

  • This scheme is initiated by Ziv and Lempel [1]. A slightly modified version is described by Storer a

    This scheme is initiated by Ziv and Lempel [1]. A slightly modified version is described by Storer and Szymanski [2]. An implementation using a binary tree is proposed by Bell [3]. The algorithm is quite simple: Keep a ring buffer, which initially contains "space" characters only. Read several letters from the file to the buffer. Then search the buffer for the longest string that matches the letters just read, and send its length and position in the buffer.

    標(biāo)簽: initiated described modified slightly

    上傳時(shí)間: 2014-01-09

    上傳用戶(hù):sk5201314

  • Contains a complete archiver by Haruhiko Okumura. The archiver uses an LZ engine whose output is c

    Contains a complete archiver by Haruhiko Okumura. The archiver uses an LZ engine whose output is compressed with static Huffman. The file is chopped into pieces which all get their own independent set of Huffman tree s. ARJ 2.41, ZIP 2.0 and PKZIP 2.04g use essentially the same method. ZOO and LHA even use excactly the same method.

    標(biāo)簽: archiver Contains complete Haruhiko

    上傳時(shí)間: 2014-01-17

    上傳用戶(hù):himbly

  • 項(xiàng)目描述: Fink is an attempt to bring the full world of Unix Open Source software to Darwin and Mac OS

    項(xiàng)目描述: Fink is an attempt to bring the full world of Unix Open Source software to Darwin and Mac OS X. Packages are downloaded and built automatically and installed into a tree managed by dpkg. Fink試圖將Unix開(kāi)源軟件世界帶入到 Darwin 和Mac OS X。工具包可以被下載和自動(dòng)生成,并安裝到由dpkg管理的樹(shù)狀結(jié)構(gòu)中。 來(lái)源: http://sourceforge.net/projects/fink/

    標(biāo)簽: software attempt Darwin Source

    上傳時(shí)間: 2015-04-17

    上傳用戶(hù):tedo811

  • 我比較喜歡的一個(gè)組件常用的互動(dòng)組件(Combobox、checkbox and Radio) ... www.huachu.com.cn/itbook/itbookinfo.asp?lbbh=BB

    我比較喜歡的一個(gè)組件常用的互動(dòng)組件(Combobox、checkbox and Radio) ... www.huachu.com.cn/itbook/itbookinfo.asp?lbbh=BB ... 91K 2005-6-9 - 百度快照 ... www.baidu.com/ s?ct=0&ie=gb2312&bs=Jtable%D6%D0%BC%D3%C8%EBcheckbox&sr=&z=&wd=Jtable++... - 20k - 補(bǔ)充材料

    標(biāo)簽: itbookinfo Combobox checkbox huachu

    上傳時(shí)間: 2014-01-21

    上傳用戶(hù):Amygdala

  • 一、編程環(huán)境: windows2003 +visual stdio c++ .net,Ado + SQL2000 二、SQL設(shè)置: 將在SQL2000下建立schooldata數(shù)據(jù)庫(kù)

    一、編程環(huán)境: windows2003 +visual stdio c++ .net,Ado + SQL2000 二、SQL設(shè)置: 將在SQL2000下建立schooldata數(shù)據(jù)庫(kù),導(dǎo)入數(shù)據(jù)文件 三、導(dǎo)入數(shù)據(jù): data目錄下有school_back數(shù)據(jù)庫(kù)備分文件 操作:用SQL企業(yè)管理器還原數(shù)據(jù)庫(kù)來(lái)導(dǎo)入數(shù)據(jù) 訪(fǎng)問(wèn)本地?cái)?shù)據(jù)庫(kù)服務(wù)器,密碼是自己設(shè)置的那個(gè),操作schooldata數(shù)據(jù)庫(kù)的用戶(hù)名和密碼相同。 主要用ADO訪(fǎng)問(wèn)數(shù)據(jù)庫(kù),和幾個(gè)顯示數(shù)據(jù)的控件Treectrl,listctrl,datagrid等程序中有幾個(gè)BUG還沒(méi)解決, 四、實(shí)現(xiàn)功能: 操作:在選擇查詢(xún)條件:選擇一個(gè),tree控件里顯示相關(guān)信息 可以在tree控件里單擊來(lái)顯示每個(gè)ITEM,每個(gè)ITEM相關(guān)信息顯示在LIST控件內(nèi) 雙擊LIST控件顯示具體信息 也可以在窗口里單擊右鍵或操作菜單具體操作 五、主要功能: 查詢(xún),添加,刪除,顯示“學(xué)院,各系,班級(jí),學(xué)生,教師,社團(tuán),課程”等信息 程序還用了Active Skin 對(duì)程序進(jìn)行了換膚!!

    標(biāo)簽: SQL 2000 schooldata windows

    上傳時(shí)間: 2015-04-26

    上傳用戶(hù):zyt

  • 我的算法作業(yè)

    我的算法作業(yè),求一個(gè)在總花費(fèi)小于1500的條件下從源結(jié)點(diǎn)到目的結(jié)點(diǎn)的最短路徑,源代碼Tree.cpp(C++語(yǔ)言編寫(xiě),VC++6.0 IDE下調(diào)試通過(guò)),利用的是分支定界算法。可執(zhí)行文件Tree.exe說(shuō)明在ReadMeFirst請(qǐng)按照說(shuō)明使用。

    標(biāo)簽: 算法

    上傳時(shí)間: 2015-04-30

    上傳用戶(hù):watch100

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