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.
标签： Transients functions Simulink transfer
上传时间： 2014-01-22
上传用户：Shaikh
电力系统暂态分析实例 One of the main uses of SimPowerSystems is to simulate Transients in electrical circuits
标签： SimPowerSystems electrical Transients circuits
上传时间： 2016-07-14
上传用户：a3318966
e-book Transients in Power Systems
标签： Transients Systems e-book Power
上传时间： 2017-04-01
上传用户：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
上传时间： 2013-11-19
上传用户：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
上传时间： 2013-11-03
上传用户：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.
上传时间： 2013-11-04
上传用户：guobing703
PSCAD/EMTDC是加拿大马尼托巴高压直流研究中心出品的一款电力系统电磁暂态仿真软件，PSCAD（Power Systems Computer Aided Design）是用户界面，EMTDC（Electromagnetic Transients including DC）是内部程序。 EMTDC最初代表直流暂态，是一套基于软件的电磁暂态模拟程序。Dennis Woodford博士于1976年在加拿大曼尼托巴水电局开发完成了EMTDC的初版，编写这个程序的原因是因为当时现存的研究工具不能够满足曼尼托巴电力局对尼尔逊河高压直流工程进行强有力和灵活的研究的要求。自此之后程序被不断开发，至今已被广泛地应用在电力系统许多类型的模拟研究，其中包括交流研究，雷电过电压和电力电子学研究。EMTDC开始时在大型计算机上使用。然后在1986年被移植到Unix系统和以后的PC机上。 PSCAD代表电力系统计算机辅助设计，PSCAD的开发成功，使得用户能更方便地使用EMTDC进行电力系统分析，使电力系统复杂部分可视化成为可能，而且软件可以作为实时数字仿真器的前置端。可模拟任意大小的交直流系统。PSCAD V1 1988年首先在阿波罗工作站上使用，然后大约在1995年PSCAD V2开始应用。PSCAD V3以PC Windows作为平台，在1999年面世。目前最新版本的是PSCAD V4.2.1。 用户可以通过调用随EMTDC 主程序一起提供的库程序模块或利用用户自己开发的元部件模型有效地组装任何可以想象出的电力系统模型和结构。EMTDC 的威力之一是可以较为简单地模拟复杂电力系统, 包括直流输电系统和其相关的控制系统。 采用 PSCAD/EMTDC 进行的典型模拟研究包括： 一般的交流电力系统电磁暂态研究 直流输电结构和控制 FACTS(灵活交流输电系统)元部件模型 由于故障、断路器操作或雷电冲击引起的电力系统的过电压研究 绝缘配合研究 谐波相互影响研究 静止补偿器研究 非线性控制系统研究 变压器饱和研究, 如铁磁振荡和铁芯饱和不稳定性研究 同步发电机和感应电动机的扭矩效应和自励磁研究 陡前波分析 研究当一台多轴系发电机与串补线路或电力电子设备相互作用时的次同步谐振现象 向孤立负荷送电 电力系统数字仿真实验室使用PSCAD/EMTDC主要进行一般的交流电力系统电磁暂态研究，进行简单和复杂电力系统的故障建模及故障仿真，分析电力系统故障电磁暂态过程。
标签： PSCAD实验指导教程
上传时间： 2016-02-16
上传用户：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.
标签： Development Protection ESD
上传时间： 2020-06-05
上传用户：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.
标签： Protection Circuit Device Design ESD and
上传时间： 2020-06-05
上传用户：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.
标签： Electromagnetic Transients Cables Power in
上传时间： 2020-06-06
上传用户：shancjb
