These Simulink blocks contain transfer functions that model the pressure and flow transients for axisymmetric 2D viscous flow of a compressible fluid in a straight rigid circular cross section pipelines. Three models are available: (1) pressures at the ends (2) flow rates at the ends (3) pressure at one end and flow rate at the other Filtering is incorporated to reduce numerical oscillation (Gibbs phenomenon). See J. Dyn. Systems, Meas. & Control vol 122 (2000) pp. 153-162.
標簽： transients functions Simulink transfer
上傳時間： 2014-01-22
上傳用戶：Shaikh
電力系統暫態分析實例 One of the main uses of SimPowerSystems is to simulate transients in electrical circuits
標簽： SimPowerSystems electrical transients circuits
上傳時間： 2016-07-14
上傳用戶：a3318966
e-book transients in Power Systems
標簽： transients Systems e-book Power
上傳時間： 2017-04-01
上傳用戶：1101055045
Battery powered applications that have a signifi cantamount of time in standby mode, require electrical circuitsto operate with a low quiescent current to preserve batterylife. The LTC3835 synchronous step-down controlleris an excellent solution with its ultralow quiescent current(80μA). Other features make it uniquely qualifi ed tosatisfy the needs of automotive applications. A wide 4Vto 36V input voltage range protects the supply againsthigh input voltage transients and is compatible with lowvoltage cold crank conditions. The constant frequencycurrent-mode architecture with high-side inductor current
上傳時間： 2013-11-20
上傳用戶：stewart·
Automotive power systems are unforgiving electronicenvironments. transients to 90V can occur when thenominal voltage range is 10V to 15V (ISO7637), along withbattery reversal in some cases. It’s fairly straightforwardto build automotive electronics around this system, butincreasingly end users want to operate portable electronics,such as GPS systems or music/video players,and to charge their Li-Ion batteries from the automotivebattery. To do so requires a compact, robust, effi cientand easy-to-design charging system
上傳時間： 2013-11-04
上傳用戶：wfl_yy
Today’s computer, datacom, and telecom systems demandpower supplies that are effi cient, respond quicklyto load transients and accurately regulate the voltageat the load. For example, load current can be measuredby using the inductor DCR, thus eliminating the needfor a dedicated sense resistor. Inductor DCR sensingincreases effi ciency—especially at heavy load—whilereducing component cost and required board space.The LTC®3856 single-output 2-phase synchronous buckcontroller improves the accuracy of inductor DCR sensingby compensating for changes in DCR due to temperature.
上傳時間： 2013-11-05
上傳用戶：guobing703
PSCAD/EMTDC是加拿大馬尼托巴高壓直流研究中心出品的一款電力系統電磁暫態仿真軟件，PSCAD（Power Systems Computer Aided Design）是用戶界面，EMTDC（Electromagnetic transients including DC）是內部程序。 EMTDC最初代表直流暫態，是一套基于軟件的電磁暫態模擬程序。Dennis Woodford博士于1976年在加拿大曼尼托巴水電局開發完成了EMTDC的初版，編寫這個程序的原因是因為當時現存的研究工具不能夠滿足曼尼托巴電力局對尼爾遜河高壓直流工程進行強有力和靈活的研究的要求。自此之后程序被不斷開發，至今已被廣泛地應用在電力系統許多類型的模擬研究，其中包括交流研究，雷電過電壓和電力電子學研究。EMTDC開始時在大型計算機上使用。然后在1986年被移植到Unix系統和以后的PC機上。 PSCAD代表電力系統計算機輔助設計，PSCAD的開發成功，使得用戶能更方便地使用EMTDC進行電力系統分析，使電力系統復雜部分可視化成為可能，而且軟件可以作為實時數字仿真器的前置端。可模擬任意大小的交直流系統。PSCAD V1 1988年首先在阿波羅工作站上使用，然后大約在1995年PSCAD V2開始應用。PSCAD V3以PC Windows作為平臺，在1999年面世。目前最新版本的是PSCAD V4.2.1。 用戶可以通過調用隨EMTDC 主程序一起提供的庫程序模塊或利用用戶自己開發的元部件模型有效地組裝任何可以想象出的電力系統模型和結構。EMTDC 的威力之一是可以較為簡單地模擬復雜電力系統, 包括直流輸電系統和其相關的控制系統。 采用 PSCAD/EMTDC 進行的典型模擬研究包括： ? 一般的交流電力系統電磁暫態研究 ? 直流輸電結構和控制 ? FACTS(靈活交流輸電系統)元部件模型 ? 由于故障、斷路器操作或雷電沖擊引起的電力系統的過電壓研究 ? 絕緣配合研究 ? 諧波相互影響研究 ? 靜止補償器研究 ? 非線性控制系統研究 ? 變壓器飽和研究, 如鐵磁振蕩和鐵芯飽和不穩定性研究 ? 同步發電機和感應電動機的扭矩效應和自勵磁研究 ? 陡前波分析 ? 研究當一臺多軸系發電機與串補線路或電力電子設備相互作用時的次同步諧振現象 ? 向孤立負荷送電 電力系統數字仿真實驗室使用PSCAD/EMTDC主要進行一般的交流電力系統電磁暫態研究，進行簡單和復雜電力系統的故障建模及故障仿真，分析電力系統故障電磁暫態過程。
標簽： PSCAD實驗指導教程
上傳時間： 2016-02-16
上傳用戶：xixi略
The goal of this book is to introduce the simulation methods necessary to describe the behaviour of semiconductor devices during an electrostatic discharge (ESD). The challenge of this task is the correct description of semiconductor devices under very high current density and high temperature transients. As it stands, the book can be no more than a snapshot and a summary of the research in this field during the past few years. The authors hope that the book will provide the basis for further development of simulation methods at this current frontier of device physics.
標簽： Development Protection ESD
上傳時間： 2020-06-05
上傳用戶：shancjb
The challenges associated with the design and implementation of Electro- static Discharge (ESD) protection circuits become increasingly complex as technology is scaled well into nano-metric regime. One must understand the behavior of semiconductor devices under very high current densities, high temperature transients in order to surmount the nano-meter ESD challenge. As a consequence, the quest for suitable ESD solution in a given technology must start from the device level. Traditional approaches of ESD design may not be adequate as the ESD damages occur at successively lower voltages in nano-metric dimensions.
標簽： Protection Circuit Device Design ESD and
上傳時間： 2020-06-05
上傳用戶：shancjb
For more than a century, overhead lines have been the most commonly used technology for transmitting electrical energy at all voltage levels, especially on the highest levels. However, in recent years, an increase in both the number and length of HVAC cables in the transmission networks of different countries like Denmark, Japan or United Kingdom has been observed. At the same time, the construction of offshore wind farms, which are typically connected to the shore through HVAC cables, increased exponentially.
標簽： Electromagnetic transients Cables Power in
上傳時間： 2020-06-07
上傳用戶：shancjb
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