Pulse-width modulation (PWM)or duty-cycle variation methodsare commonly used in speedcontrol of DC motors. The duty cycleis defined as the percentage of digital‘high’ to digital ‘low’ plus digital ‘high’pulse-width during a PWM period.Fig. 1 shows the 5V pulses with 0%through 50% duty cycle.The average DC voltage value for0% duty cycle is zero; with 25% dutycycle the average value is 1.25V (25%of 5V). With 50% duty cycle the averagevalue is 2.5V, and if the duty cycleis 75%, the average voltage is 3.75Vand so on. The ....etc

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Presented by;
K.HEMAKISHORE
P.MANASA
K.SAIKUMAR
A.D.V.PRASAD


BER Performance Analysis of Asynchronous DS-CDMA Systems Using BPSK Modulation over Fading Channels
ABSTRACT :
An asynchronous binary DS-CDMA system using
random spreading sequences is considered when communicating
over various fading c ....etc

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Abstract:
This project is designed to control the robot direction using PC. The control unit in receiver section controls the robot direction according to the commands given from PC which is present in the transmitter section by using RF wireless communication. As control unit 8051 microcontroller is used
One is transmitter and the second one is receiver section. Transmitter section consists of microcontroller, PC and RF transmitter. Micro controller is interfaced to PC through serial communication using MAX 2 ....etc

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about multi device control system using frequency modulation in to the right box for getting free material and support from us/dedicated premium members...
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Speed Control of Space Vector Modulated Inverter Driven Induction Motor ppt required
....etc

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Abstract.
In this paper a novel modular digital controlalgorithm for multi level inverters is introduced and discussed.This algorithm is essentially based on the duty cycle expressionand allows a great simplification, because of its modularity andits simple implementation. The algorithm is particularly suitablefor the Multi Point Clamped (MPC) inverters with no constrainton the number of the voltage levels and results faster than themost recent solutions proposed in literature.The modulation techniques considered in the paper are the ....etc

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Novel Direct Torque Control Based on Space Vector Modulation WithAdaptive Stator Flux Observer for Induction Motors




INTRODUCTION


Direct torque control based on space vector modulation (DTC-SVM) preserve DTC transient merits, furthermore, produce better quality steady-state performance

In a wide speed range, at each cycle period, SVM technique is used to obtain the reference voltage space vector to exactly compensate the
flux and torque errors.

....etc

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request free material(ppt or pdf) about speed torque control techniques of synchronous motors,direct torque control of a permanent magnet synchronous motor with pulse width modulation ....etc

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: RADHIKA U.K(42)
: REMYA JOHNY(44)
: SANGEETHA THOMAS(46)
: SUBIN P SUNNY(54)

CONTENTS

INTRODUCTION
OBJECTIVE
BLOCK DIAGRAM
CIRCUIT DIAGRAM
WORKING
COMPARITIVE STUDY OF CIRCUIT WITH AND WITHOUT PWM
FEATURES
ADVANTAGES AND DISADVANTAGES OF LED
COMPARISON OF LED LAMPS WITH OTHER LIGHTING TECHNOLOGIES
CONCLUSION
FUTURE SCOPE
REFERENCES

INTRODUCTION
Growing demand for th ....etc

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PRESENTATION
ON
Modeling and Simulation of Space Vector Pulse Width Modulation (SVPWM) Scheme for Inverter Using MATLAB/SIMULINK

Under the Guidance of:
Krishna Kumar Gupta
I Sem. PhD

Presented by:
Sch. No. 093113101
Dr. Shailendra Jain
Associate Professor

content

Review of Theory of Space Vector Pulse Width Modulation (SVPWM) Technique
Steps to Realize SVPWM
MATLAB/Simulink Model
Details of Various Blocks
Results and Comparisons
Conclusions
Reference ....etc

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