·上传一些无刷电机BLDC的资料,还有几篇直接转矩DTC的控制文章,希望对大家能有帮助。 (原文件名: A New Simulation MODEL of BLDC Motor With Real Back EMF Waveform.pdf) (原文件名: A Sensorless Approach to Control of a Turbodynamic.PDF)
上传时间: 2013-06-09
上传用户:czl10052678
PPT文档,24页,图文结合 MODELsim仿真工具是MODEL公司开发的。它支持Verilog、VHDL以及他们的混合仿真,它可以将整个程序分步执行,使设计者直接看到他的程序下一步要执行的语句,而且在程序执行的任何步骤任何时刻都可以查看任意变量的当前值,可以在Dataflow窗口查看某一单元或模块的输入输出的连续变化等,比Quartus自带的仿真器功能强大的多,是目前业界最通用的仿真器之一。 MODELSim分几种不同的版本:SE、PE和OEM,其中集成在 Actel、Atmel、Altera、Xilinx以及Lattice等FPGA厂商设计工具中的均是其OEM版本。比如为Altera提供的OEM版本是MODELSim-Altera,为Xilinx提供的版本为MODELSim XE. SE版本为最高级版本,在功能和性能方面比OEM版本强很多,比如仿真速度方面,还支持PC 、 UNIX 、 LIUNX混合平台.
上传时间: 2013-05-25
上传用户:zhangzhenyu
·Roger Aarenstruproger.aarenstrup@mathworks.comCONTENTSIntroduction 3The dc motor MODEL 4Speed control with pid &nb
上传时间: 2013-04-24
上传用户:hehuaiyu
it consist of PCF8583 assembly driver, Proteus RTC example that is schematic, Proteus library and MODEL files
标签: assembly consist driver 8583
上传时间: 2013-09-25
上传用户:1477849018@qq.com
EDA (Electronic Design Automation)即“电子设计自动化”,是指以计算机为工作平台,以EDA软件为开发环境,以硬件描述语言为设计语言,以可编程器件PLD为实验载体(包括CPLD、FPGA、EPLD等),以集成电路芯片为目标器件的电子产品自动化设计过程。“工欲善其事,必先利其器”,因此,EDA工具在电子系统设计中所占的份量越来越高。下面就介绍一些目前较为流行的EDA工具软件。 PLD 及IC设计开发领域的EDA工具,一般至少要包含仿真器(Simulator)、综合器(Synthesizer)和配置器(Place and Routing, P&R)等几个特殊的软件包中的一个或多个,因此这一领域的EDA工具就不包括Protel、PSpice、Ewb等原理图和PCB板设计及电路仿真软件。目前流行的EDA工具软件有两种分类方法:一种是按公司类别进行分类,另一种是按功能进行划分。 若按公司类别分,大体可分两类:一类是EDA 专业软件公司,业内最著名的三家公司是Cadence、Synopsys和Mentor Graphics;另一类是PLD器件厂商为了销售其产品而开发的EDA工具,较著名的公司有Altera、Xilinx、lattice等。前者独立于半导体器件厂商,具有良好的标准化和兼容性,适合于学术研究单位使用,但系统复杂、难于掌握且价格昂贵;后者能针对自己器件的工艺特点作出优化设计,提高资源利用率,降低功耗,改善性能,比较适合产品开发单位使用。 若按功能分,大体可以分为以下三类。 (1) 集成的PLD/FPGA开发环境 由半导体公司提供,基本上可以完成从设计输入(原理图或HDL)→仿真→综合→布线→下载到器件等囊括所有PLD开发流程的所有工作。如Altera公司的MaxplusⅡ、QuartusⅡ,Xilinx公司的ISE,Lattice公司的 ispDesignExpert等。其优势是功能全集成化,可以加快动态调试,缩短开发周期;缺点是在综合和仿真环节与专业的软件相比,都不是非常优秀的。 (2) 综合类 这类软件的功能是对设计输入进行逻辑分析、综合和优化,将硬件描述语句(通常是系统级的行为描述语句)翻译成最基本的与或非门的连接关系(网表),导出给PLD/FPGA厂家的软件进行布局和布线。为了优化结果,在进行较复杂的设计时,基本上都使用这些专业的逻辑综合软件,而不采用厂家提供的集成PLD/FPGA开发工具。如Synplicity公司的Synplify、Synopsys公司的FPGAexpress、FPGA Compiler Ⅱ等。 (3) 仿真类 这类软件的功能是对设计进行模拟仿真,包括布局布线(P&R)前的“功能仿真”(也叫“前仿真”)和P&R后的包含了门延时、线延时等的“时序仿真”(也叫“后仿真”)。复杂一些的设计,一般需要使用这些专业的仿真软件。因为同样的设计输入,专业软件的仿真速度比集成环境的速度快得多。此类软件最著名的要算MODEL Technology公司的MODELsim,Cadence公司的NC-Verilog/NC-VHDL/NC-SIM等。 以上介绍了一些具代表性的EDA 工具软件。它们在性能上各有所长,有的综合优化能力突出,有的仿真模拟功能强,好在多数工具能相互兼容,具有互操作性。比如Altera公司的 QuartusII集成开发工具,就支持多种第三方的EDA软件,用户可以在QuartusII软件中通过设置直接调用MODELsim和 Synplify进行仿真和综合。 如果设计的硬件系统不是很大,对综合和仿真的要求不是很高,那么可以在一个集成的开发环境中完成整个设计流程。如果要进行复杂系统的设计,则常规的方法是多种EDA工具协调工作,集各家之所长来完成设计流程。
上传时间: 2013-11-19
上传用户:wxqman
第一部分 信号完整性知识基础.................................................................................5第一章 高速数字电路概述.....................................................................................51.1 何为高速电路...............................................................................................51.2 高速带来的问题及设计流程剖析...............................................................61.3 相关的一些基本概念...................................................................................8第二章 传输线理论...............................................................................................122.1 分布式系统和集总电路.............................................................................122.2 传输线的RLCG 模型和电报方程...............................................................132.3 传输线的特征阻抗.....................................................................................142.3.1 特性阻抗的本质.................................................................................142.3.2 特征阻抗相关计算.............................................................................152.3.3 特性阻抗对信号完整性的影响.........................................................172.4 传输线电报方程及推导.............................................................................182.5 趋肤效应和集束效应.................................................................................232.6 信号的反射.................................................................................................252.6.1 反射机理和电报方程.........................................................................252.6.2 反射导致信号的失真问题.................................................................302.6.2.1 过冲和下冲.....................................................................................302.6.2.2 振荡:.............................................................................................312.6.3 反射的抑制和匹配.............................................................................342.6.3.1 串行匹配.........................................................................................352.6.3.1 并行匹配.........................................................................................362.6.3.3 差分线的匹配.................................................................................392.6.3.4 多负载的匹配.................................................................................41第三章 串扰的分析...............................................................................................423.1 串扰的基本概念.........................................................................................423.2 前向串扰和后向串扰.................................................................................433.3 后向串扰的反射.........................................................................................463.4 后向串扰的饱和.........................................................................................463.5 共模和差模电流对串扰的影响.................................................................483.6 连接器的串扰问题.....................................................................................513.7 串扰的具体计算.........................................................................................543.8 避免串扰的措施.........................................................................................57第四章 EMI 抑制....................................................................................................604.1 EMI/EMC 的基本概念..................................................................................604.2 EMI 的产生..................................................................................................614.2.1 电压瞬变.............................................................................................614.2.2 信号的回流.........................................................................................624.2.3 共模和差摸EMI ..................................................................................634.3 EMI 的控制..................................................................................................654.3.1 屏蔽.....................................................................................................654.3.1.1 电场屏蔽.........................................................................................654.3.1.2 磁场屏蔽.........................................................................................674.3.1.3 电磁场屏蔽.....................................................................................674.3.1.4 电磁屏蔽体和屏蔽效率.................................................................684.3.2 滤波.....................................................................................................714.3.2.1 去耦电容.........................................................................................714.3.2.3 磁性元件.........................................................................................734.3.3 接地.....................................................................................................744.4 PCB 设计中的EMI.......................................................................................754.4.1 传输线RLC 参数和EMI ........................................................................764.4.2 叠层设计抑制EMI ..............................................................................774.4.3 电容和接地过孔对回流的作用.........................................................784.4.4 布局和走线规则.................................................................................79第五章 电源完整性理论基础...............................................................................825.1 电源噪声的起因及危害.............................................................................825.2 电源阻抗设计.............................................................................................855.3 同步开关噪声分析.....................................................................................875.3.1 芯片内部开关噪声.............................................................................885.3.2 芯片外部开关噪声.............................................................................895.3.3 等效电感衡量SSN ..............................................................................905.4 旁路电容的特性和应用.............................................................................925.4.1 电容的频率特性.................................................................................935.4.3 电容的介质和封装影响.....................................................................955.4.3 电容并联特性及反谐振.....................................................................955.4.4 如何选择电容.....................................................................................975.4.5 电容的摆放及Layout ........................................................................99第六章 系统时序.................................................................................................1006.1 普通时序系统...........................................................................................1006.1.1 时序参数的确定...............................................................................1016.1.2 时序约束条件...................................................................................1063.2 高速设计的问题.......................................................................................2093.3 SPECCTRAQuest SI Expert 的组件.......................................................2103.3.1 SPECCTRAQuest MODEL Integrity .................................................2103.3.2 SPECCTRAQuest Floorplanner/Editor .........................................2153.3.3 Constraint Manager .......................................................................2163.3.4 SigXplorer Expert Topology Development Environment .......2233.3.5 SigNoise 仿真子系统......................................................................2253.3.6 EMControl .........................................................................................2303.3.7 SPECCTRA Expert 自动布线器.......................................................2303.4 高速设计的大致流程...............................................................................2303.4.1 拓扑结构的探索...............................................................................2313.4.2 空间解决方案的探索.......................................................................2313.4.3 使用拓扑模板驱动设计...................................................................2313.4.4 时序驱动布局...................................................................................2323.4.5 以约束条件驱动设计.......................................................................2323.4.6 设计后分析.......................................................................................233第四章 SPECCTRAQUEST SIGNAL EXPLORER 的进阶运用..........................................2344.1 SPECCTRAQuest Signal Explorer 的功能包括:................................2344.2 图形化的拓扑结构探索...........................................................................2344.3 全面的信号完整性(Signal Integrity)分析.......................................2344.4 完全兼容 IBIS 模型...............................................................................2344.5 PCB 设计前和设计的拓扑结构提取.......................................................2354.6 仿真设置顾问...........................................................................................2354.7 改变设计的管理.......................................................................................2354.8 关键技术特点...........................................................................................2364.8.1 拓扑结构探索...................................................................................2364.8.2 SigWave 波形显示器........................................................................2364.8.3 集成化的在线分析(Integration and In-process Analysis) .236第五章 部分特殊的运用...............................................................................2375.1 Script 指令的使用..................................................................................2375.2 差分信号的仿真.......................................................................................2435.3 眼图模式的使用.......................................................................................249第四部分:HYPERLYNX 仿真工具使用指南............................................................251第一章 使用LINESIM 进行前仿真.......................................................................2511.1 用LineSim 进行仿真工作的基本方法...................................................2511.2 处理信号完整性原理图的具体问题.......................................................2591.3 在LineSim 中如何对传输线进行设置...................................................2601.4 在LineSim 中模拟IC 元件.....................................................................2631.5 在LineSim 中进行串扰仿真...................................................................268第二章 使用BOARDSIM 进行后仿真......................................................................2732.1 用BOARDSIM 进行后仿真工作的基本方法...................................................2732.2 BoardSim 的进一步介绍..........................................................................2922.3 BoardSim 中的串扰仿真..........................................................................309
上传时间: 2014-04-18
上传用户:wpt
Integrated EMI/Thermal Design forSwitching Power SuppliesWei ZhangThesis submitted to the Faculty of theVirginia Polytechnic Institute and State Universityin partial fulfillment of the requirements for the degree of Integrated EMI/Thermal Design forSwitching Power SuppliesWei Zhang(ABSTRACT)This work presents the MODELing and analysis of EMI and thermal performancefor switch power supply by using the CAD tools. The methodology and design guidelinesare developed.By using a boost PFC circuit as an example, an equivalent circuit MODEL is builtfor EMI noise prediction and analysis. The parasitic elements of circuit layout andcomponents are extracted analytically or by using CAD tools. Based on the MODEL, circuitlayout and magnetic component design are modified to minimize circuit EMI. EMI filtercan be designed at an early stage without prototype implementation.In the second part, thermal analyses are conducted for the circuit by using thesoftware Flotherm, which includes the mechanism of conduction, convection andradiation. Thermal MODELs are built for the components. Thermal performance of thecircuit and the temperature profile of components are predicted. Improved thermalmanagement and winding arrangement are investigated to reduce temperature.In the third part, several circuit layouts and inductor design examples are checkedfrom both the EMI and thermal point of view. Insightful information is obtained.
上传时间: 2013-11-10
上传用户:1595690
提出了一种24V/15A 直流变换器的设计方法。主电路采用推挽正激电路,通过在传统推挽电路的基础上增加一个箝位电容,起到抑制偏磁和开关管关断电压尖峰的作用。控制采用峰值电流控制方式(Peak CurrentControlled MODEL,简称PCCM),为了克服其对占空比要求的限制,加入了斜坡补偿环节。在进行详细的理论分析基础上,给出了主电路和控制电路一些关键参数的设计步骤;最后通过原理样机的研制,验证了理论分析的正确性。
上传时间: 2013-10-23
上传用户:dick_sh
在航电系统维护过程中,为解决定位故障的效率和降低维修成本等问题,提出了基于ICD(Interface Control Document,接口控制文件)的1553B总线的信息监控系统模型。该系统运用数据采集卡对总线中传输的信号有无失真、偏差等电气特性进行检测,并使用1553B通讯卡通过测控软件LabWindows/CVI编程与ICD数据库的动态链接,实现总线信息的解析和故障的判断。与传统的维护过程相比,这种模型能够从信号的电气特性以及信息的解析等全方位的去检测判断故障的来源,并且能够广泛在其他1553B总线系统内扩展应用。验证表明该监控系统可以对总线信息进行快速有效地监测分析,能满足应用需求。 Abstract: In the process of avionics system maintenance, to solve the problems such as improving the efficiency of fast orientation to troubles and reducing maintenance cost, system of 1553B bus information monitor MODEL based on ICD was proposed. The system observed whether the data which transmitted on the bus appear distortion and deviation by using data acquisition card. And using 1553B communication card programming of the measure software LabWindows/CVI and the dynamic linking of ICD database, message analysis and fault estimation could be realized. Compared with traditional maintenance, this MODEL can all-dimensionally detect and analyze the source of faults from both electrical characteristics of the signal and message analysis, and it can be widely applied in the other 1553B system. Experiment shown that this monitor system can effectively detect and analyze the bus message and can meet the application requirements.
上传时间: 2013-11-23
上传用户:18752787361
为深入了解基于UC3854A控制的PFC变换器中的动力学特性,研究系统参数变化对变换器中分岔现象的影响,在建立Boost PFC变换器双闭环数学模型的基础上,用Matlab软件对变换器中慢时标分岔及混沌等不稳定现象进行了仿真。在对PFC变换器中慢时标分岔现象仿真的基础上,分析了系统参数变化对分岔点的影响,并进行了仿真验证。仿真结果清晰地显示了输入整流电压的幅值变化对系统分岔点的影响。 Abstract: In order to better understand the dynamics characteristic of power factor correction converter based on UC3854A, and make the way that parameters change influences the bifurcation phenomena of the system clearly. The math MODEL of the two closed loop circuits to the Boost PFC (Power Factor Correction) converter controller was built. Then, with the help of Matlab, the simulation for nonlinear phenomena such as chaos and slow-scale bifurcation in the PFC converter was made. Finally the factors that have influence to the phenomenon of bifurcation under slow-scale in PFC converter were analyzed. The simulation results clearly show the parameters change influences the bifurcation point of the system.
上传时间: 2013-10-17
上传用户:杜莹12345