Application System Modeling Data Modeling through ER Model
Context Level Diagram
Data Flow Diagram
1. It is a graphical tool for designing systems ,input ,process and output.
2. It represents flow of data through system.
3. It shows the processes ,data stores ,sources & destination entities .
4. The transformation of data from input to output through process is described logically.
5. The top level diagram is called context diagram. It contains single process .It gives a broad overview of the system under ....etc

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Pulse Width Modulation is widely used in power electronics as a controller in power conversion and motion control. Among different types of modulating modes the Sinusoidal Pulse Width Modulation (SPWM) and Space Vector PWM are two common strategies in adjustable speed drive system. The Pulse width of SPWM varies with the Sine wave so as to restrain the lower order harmonics with easy control and large D C utilization. With successively improving reliability and performance of digital controllers, the digital control techniques have predominated ....etc

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I am in need of detailed project material about pwm based speed control of dc motor using 8052 controller. ....etc

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What it the meaning of V/F and PMW technique? kindly break down the steps involved in actualization of the project. ....etc

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Introduction to Pulse Width Modulation (PWM)
In this technique several pulses are produced in each half – cycle but the width of the pulses
is not the same as in case of multiple – pulse width modulation, however the width of each pulse is
varied in accordance with the amplitude of the sine wave reference voltage. The width of the pulse
at the center of the half – cycle is maximum and decreases on either side. The figure 6(a) shows the
generation of the output signal by comparing a sinusoidal reference sign ....etc

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please send ppt on this topic within 2 days ....etc

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Abstract:
The number of industry applications in which induction motors are fed by static frequency inverters is growing fast and, although much has already been done within this field, there is still a lot to be studied/understood regarding such applications. The advance of variable speed drives systems engineering increasingly leads to the need of specific technical guidance provision by electrical machines and drives manufacturers, In this paper we have studied and developed a simulink model with PWM inverter and find out the vario ....etc

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A practical method of modeling wind generator control systems for network simulation using Matlab-Simulink is presented. The interface developed between PSS/E and Matlab-Simulink allows the models generated to be used directly in PSS/E dynamic simulation. Fundamentally, modeling involves understanding the dynamics of equipments to be modeled and deriving the differential and algebraic equations which are coded using a high level computing language. For network elements resilient to change, the latter remains the method.
However, wind generator ....etc

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sir i m BTECH,FINAL YEAR electrical engineering student from IET,LUCKNOW i m working with the pid control based single phase inverter design project so i m in need of simlink model of pwm inverter with steps for making my project so from your side i need your help .
pawan sharma ....etc

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Sir/Madam
Can i get the information regarding the above mentioned project topic. ....etc

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