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小型風機最大功率點快速跟蹤策略的仿真研究

風力發電系統的輸出功率受外界因數和風速的影響。為了提高小型風機發電機組的轉換效率，文中采用一種最大功率優化跟蹤算法。以變步長來跟蹤風速變化，當功率變化小于一個閾值時停止搜索，來實現最大功率收索的快速性和穩定性。以帶齒輪箱6 kW的鼠籠異步式風力發電并網為基礎，通過Matlab/Simulink軟件仿真結果證實此種方法與定步長爬山法相比，能夠達到快速跟蹤最大功率點和避免達到最大功率點附近的時候頻繁波動。

標簽： 風機最大功率點仿真研究策略

上傳時間： 2013-11-14

上傳用戶：agent
利用纖巧型負載點電路來簡化電源電壓的跟蹤和排序

Multiple-voltage electronics systems often requirecomplex supply voltage tracking or sequencing, whichif not met, can result in system faults or even permanentfailures in the fi eld. The design diffi culties in meetingthese requirements are often compounded in distributedpowerarchitectures where point-of-load (POL) DC/DCconverters or linear regulators are scattered across PCboard space, sometimes on different board planes. Theproblem is that power supply circuitry is often the lastcircuitry to be designed into the board, and it must beshoehorned into whatever little board real estate is left.Often, a simple, drop-in, fl exible solution is needed tomeet these requirements.

標簽： 負載點電路電源電壓排序

上傳時間： 2013-10-08

上傳用戶：15071087253
多相DC/DC控制器精度和帶寬限制

Speed and accuracy don’t always go hand-in-handin DC/DC converter systems—that is, until now. TheLTC3811 is a dual output, fi xed frequency current modeDC/DC switching regulator controller designed for one oftoday’s most demanding power supply applications: highcurrent, low voltage processor core supplies.

標簽： DC 多相控制器帶寬

上傳時間： 2013-11-21

上傳用戶：aix008
GPON系統的APD偏置解決方案

Avalanche photo diode (APD) receiver modules arewidely used in fi ber optic communication systems. AnAPD module contains the APD and a signal conditioningamplifi er, but is not completely self contained. It stillrequires signifi cant support circuitry including a highvoltage, low noise power supply and a precision currentmonitor to indicate the signal strength. The challenge issqueezing this support circuitry into applications withlimited board space. The LT®3482 addresses this challengeby integrating a monolithic DC/DC step-up converter andan accurate current monitor. The LT3482 can supportup to a 90V APD bias voltage, and the current monitorprovides better than 10% accuracy over four decades ofdynamic range (250nA to 2.5mA).

標簽： GPON APD 方案

上傳時間： 2014-01-18

上傳用戶：wenyuoo
運用LT3092電流源以高線性度來實現溫度至電流轉換

One of the fi rst lessons in a basic electronics coursecovers the symbols for resistors, capacitors, inductors,voltage sources and current sources. Althougheach symbol represents a functional component of areal-world circuit, only some of the symbols have directphysical counterparts. For instance, the three discretepassive devices—resistors, capacitors, inductors—canbe picked off a shelf and placed on a real board muchas their symbolic analogs appear in a basic schematic.Likewise, while voltage sources have no direct 2-terminalanalog, a voltage source can be easily built with an offthe-shelf linear regulator.

標簽： 3092 LT 電流源溫度

上傳時間： 2013-11-24

上傳用戶：simonpeng
高電壓,低噪音,DCDC轉換器

Photomultipliers (PMT), avalanche photodiodes (APD),ultrasonic transducers, capacitance microphones, radiationdetectors and similar devices require high voltage,low current bias. Additionally, the high voltage must bepristinely free of noise; well under a millivolt is a commonrequirement with a few hundred microvolts sometimesnecessary. Normally, switching regulator confi gurationscannot achieve this performance level without employingspecial techniques. One aid to achieving low noise is thatload currents rarely exceed 5mA. This freedom permitsoutput fi ltering methods that are usually impractical

標簽： DCDC 高電壓低噪音轉換器

上傳時間： 2013-10-28

上傳用戶：lhw888
51單片機花朵開放程序

當花開完畢時等待按鍵按下即可收花。如真正的花朵開放一模一樣。

標簽： 51單片機程序

上傳時間： 2013-12-23

上傳用戶：hustfanenze
51單片機的10大作品，都不是蓋的

51單片機的10大作品，都不是蓋的，，，，收受益匪淺

標簽： 51單片機

上傳時間： 2013-10-13

上傳用戶：xfbs821
Broadcom推出全球第一個802.11n單芯片解決方案

北京，2007年9月27日——全球有線和無線通信半導體市場的領導者Broadcom（博通）公司（Nasdaq：BRCM）今天宣布，推出全球第一個全功能802.11n單芯片解決方案BCM4322。BCM4322是Broadcom Intensi-fiTM產品系列的最新成員，它不僅是市場上最小和最經濟的802.11n解決方案，而且第一個讓Wi-Fi產品的實際無線吞吐量超過了200Mbps。這款最新的Intensi-fi芯片兼有前所未有的無線性能和很多新功能，擴大了無線覆蓋范圍，使無線網絡能夠兌現802.11n的承諾，即同時支持幾路多媒體應用，包括高清視頻流。

標簽： Broadcom 802.11 單芯片方案

上傳時間： 2014-01-14

上傳用戶：haohaoxuexi
單片機實驗課案例簡介

由于具有單片機體積小、重量輕、價格低、耗電少、可靠性高、功能強、速度快、易擴展等特點。因此，單片機廣泛應用于家電(洗衣、豆漿、微波爐、燃氣表、健身器）；商業(電子秤、收銀機）；辦公(打印機、繪圖儀、傳真機）；智能化儀表；機電一體化(數控機械、醫療設備、汽車)；工業控制(溫度、液面、順序控制、電氣傳動)；多機應用(構成大型實時測控系統)。另外，還在不斷開拓新的應用領域，因此非常有必要學好單片機知識。

標簽： 單片機實驗案例

上傳時間： 2013-11-14

上傳用戶：cepsypeng

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