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本文介紹了開關(guān)磁阻電機(jī)驅(qū)動系統(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)展簡介 開關(guān)磁阻電機(jī)(Switched Reluctance Motor, SRM)最早可以追溯到1970年，英國Leeds大學(xué)步進(jìn)電機(jī)研究小組首創(chuàng)一個(gè)開關(guān)磁阻電機(jī)雛形。到1972年進(jìn)一步對帶半導(dǎo)體開關(guān)的小功率電動機(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的電瓶汽車提供裝置。1980年在英國成立了開關(guān)磁阻電機(jī)驅(qū)動裝置有限公司(SRD Ltd.)，專門進(jìn)行SRD系統(tǒng)的研究、開發(fā)和設(shè)計(jì)。1983年英國(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的驅(qū)動系統(tǒng)，到1986年已運(yùn)行500km。該產(chǎn)品的出現(xiàn)，在電氣傳動界引起不小的反響。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)到或超過了工業(yè)中長期廣泛應(yīng)用的一些變速傳動系統(tǒng)。下表是當(dāng)時(shí)對幾種常用變速傳動系統(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、加拿大、南斯拉夫、埃及等國家也都開展了SRD系統(tǒng)的研制工作。在國外的應(yīng)用中，SRD一般用于牽引中，例如電瓶車和電動汽車。同時(shí)高速性能是SRD的一個(gè)特長的方向。據(jù)報(bào)道，美國為空間技術(shù)研制了一個(gè)25000r/min、90kW的高速SRD樣機(jī)。我國大約在1985年才開始對SRD系統(tǒng)進(jìn)行研究。SRD系統(tǒng)的研究已被列入我國中、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的純電動轎車，在“十五”項(xiàng)目中將SRD應(yīng)用到混合動力城市公交車，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)，煤礦牽引及電動車輛等，取得了顯著的經(jīng)濟(jì)效益。 從上世紀(jì)90年代國際會議的上有關(guān)SRD系統(tǒng)的文章來看，對SRD系統(tǒng)的研究工作已經(jīng)從論證它的優(yōu)點(diǎn)、開發(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： 開關(guān)磁阻電機(jī) 發(fā)展 驅(qū)動系統(tǒng) 講座
上傳時(shí)間： 2013-10-11
上傳用戶：xjz632
多遠(yuǎn)程二極管溫度傳感器-Design Considerations for pc thermal management Multiple RDTS (remote diode temperature sensing) provides the most accurate method of sensing an IC’s junction temperature. It overcomes thermal gradient and placement issues encountered when trying to place external sensors. PCB component count decreases when using a device that provides multiple inputs.Better temperature sensing improves product performance and reliability. Disk DRIVE data integrity suffers at elevated temperatures. IBM published an article stating that a 5°C rise in operating temperature causes a 15% increase in the DRIVE’s failure rate. The overall performance of a system can be improved by providing a more accurate temperature measurement of the most critical devices allowing them to run just a few degrees hotter.The LM83 directly senses its own temperature and the temperature of three external PN junctions. One is dedicated to the CPU of choice, the other two go to other parts of your system that need thermal monitoring such as the disk DRIVE or graphics chip. The SMBus-compatible LM83 supports SMBus timeout and logic levels. The LM83 has two interrupt outputs; one for user-programmable limits and WATCHDOG capability (INT), the other is a Critical Temperature Alarm output (T_CRIT_A) for system power supply shutdown.
標(biāo)簽： Considerat Design 遠(yuǎn)程 二極管
上傳時(shí)間： 2014-12-21
上傳用戶：ljd123456
Abstract: Designers who must interface 1-Wire temperature sensors with Xilinx field-programmable gate arrays(FPGAs) can use this reference design to DRIVE a DS28EA00 1-Wire slave device. The downloadable softwarementioned in this document can also be used as a starting point to connect other 1-Wire slave devices. The systemimplements a 1-Wire master connected to a UART and outputs temperature to a PC from the DS28EA00 temperaturesensor. In addition, high/low alarm outputs are displayed from the DS28EA00 PIO pins using LEDs.
標(biāo)簽： PicoBlaze Create Master Xilinx
上傳時(shí)間： 2013-11-12
上傳用戶：大三三
According to CIBC World Markets, Equity Research, theFlat Panel Display (FPD) industry has achieved sufficientcritical mass for its growth to explode. Thus, it can nowattract the right blend of capital investments and R&Dresources to DRIVE technical innovation toward continuousimprovement in view quality, manufacturing efficiency,and system integration. These in turn are sustainingconsumer interest, penetration, revenue growth, and thepotential for increasing long-term profitability for industryparticipants. CIBC believes that three essential conditionsare now converging to DRIVE the market forward
上傳時(shí)間： 2015-01-02
上傳用戶：小楓殘?jiān)?/p>
The revolution of automation on factory floors is a key DRIVEr for the seemingly insatiable demand for higher productivity， lower total cost of ownership，and high safety. As a result， industrial applications DRIVE an insatiable demand of higher data bandwidth and higher system-level performance. This white paper describes the trends and challenges seen by designers and how FPGAs enable solutions to meet their stringent design goals.
標(biāo)簽： xilinx FPGAs 工業(yè) 中的應(yīng)用
上傳時(shí)間： 2013-11-08
上傳用戶：yan2267246
這個(gè)例子是和FileBackup配合使用的，這樣上層的Application可以判斷DRIVE有沒有改變，是不是要backup。
標(biāo)簽： FileBackup
上傳時(shí)間： 2015-01-09
上傳用戶：冇尾飛鉈
使用的是API編程,可格式化、校驗(yàn)和讀寫特殊扇區(qū)?？捎米鱓indows下的磁盤加密。本函數(shù)還有以下兩個(gè)缺點(diǎn)以待改進(jìn)： 1.本函數(shù)還只能讀能讀 A: 和 B:,即只能對軟盤操作 2.不能改變磁盤扇區(qū)大小，只能是標(biāo)準(zhǔn)的 512 個(gè)字節(jié)。 參數(shù)說明: command 操作: 0 重置磁盤 2 讀扇區(qū) 3 寫扇區(qū) 4 校驗(yàn)磁道 5 格式化磁道 8 得到設(shè)備參數(shù) (int 1EH) DRIVE 驅(qū)動器 A:=0 B:=1 head 磁頭號,范圍 0 - 1 track 磁道號,范圍 0 - 84 ( 80 - 84 為特殊磁道，通常用來加密 ) sector 扇區(qū)號,范圍 0 - 255 ( 19 - 255 為非標(biāo)準(zhǔn)扇區(qū)編號，通常用來加密) nsectors 每次讀或?qū)懙纳葏^(qū)數(shù),不能超出每磁道的最大扇區(qū)數(shù) buffer 數(shù)據(jù)寫入或讀出的緩沖區(qū)，大小為 512 個(gè)字節(jié) 返回值 ( 同 Int 13H ): 0x0 成功 0x1 無效的命令 0x3 磁盤被寫保護(hù) 0x4 扇區(qū)沒有找到 0xa 發(fā)現(xiàn)壞扇區(qū) 0x80 磁盤沒有準(zhǔn)備好
標(biāo)簽： Windows API 函數(shù) 磁盤
上傳時(shí)間： 2013-12-05
上傳用戶：moerwang
Altera recommends the following system configuration: * Pentium II 400 with 512-MB system memory (faster systems give better software performance) * SVGA monitor * CD-ROM DRIVE * One or more of the following I/O ports: - USB port (if using Windows XP or Windows 2000) for USB-Blaster(TM) or MasterBlaster(TM) communications cables, or APU programming unit - Parallel port for ByteBlasterMV(TM) or ByteBlaster(TM) II download cables - Serial port for MasterBlaster communications cable * TCP/IP networking protocol installed * Windows 2000, Windows NT 4.0 with Service Pack 3 or later, or Windows XP * Internet Explorer 5.0 or later Memory & Disk Space Requirements USB開發(fā)
標(biāo)簽： system configuration recommends following
上傳時(shí)間： 2015-03-27
上傳用戶：13188549192
FPFilter is a sample disk filter DRIVEr that demonstrates how a disk failure prediction filter DRIVEr could be implemented. A failure prediction filter DRIVEr can predict when a disk may fail and notify the disk DRIVEr stack of this condition.
標(biāo)簽： filter disk demonstrates prediction
上傳時(shí)間： 2015-03-30
上傳用戶：變形金剛
uc/os-ii for 8051 This package provides the sources required to use the uC/OS-II v2.00 real time kernel on the 8051 processor. To use this package you will need the TASKING C Compiler toolset v6.0r1 or higher. For info on TASKING products you can contact our Web-site at: http://www.tasking.com Unzip the zipfile in the root of the DRIVE where you also installed the uC/OS-II general sources. The following directories will be added: \SOFTWARE\UCOS-II\8051 This directory contains the microprocessor specific source code \SOFTWARE\UCOS-II\ex1_8051r This directory contains the project files for the first example \SOFTWARE\UCOS-II\ex2_8051r This directory contains the project files for the second example
標(biāo)簽： the provides required package
上傳時(shí)間： 2015-05-21
上傳用戶：ainimao
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