Abstract
This paper deals with a reduced rating delta-polygon
autotransformer based twenty-four-pulse ac-dc converter feeding
variable frequency induction motor drives (VFIMD's) for
improving power quality at the point of common coupling (PCC).
The proposed twenty four-pulse ac-dc converter is realized on the
principle of dc ripple re-injection technique for harmonic
mitigation. The design of the proposed autotransformer is
developed alongwith the necessary modifications required for
making it suitable for retrofit applications, ....etc

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cud u pls mail me schematic of speed control of dc motor using chopper ....etc

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To get full information or details of speed control of chopper fed dc motor please have a look on the pages

http://seminarsprojects.net/Thread-chopper-fed-dc-motor-drive

http://seminarsprojects.net/Thread-h-bridge-fed-dc-motor-speed-control-full-report

if you again feel trouble on speed control of chopper fed dc motor please reply in that page and ask specific fields in speed control of chopper fed dc motor ....etc

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2.1 INTRODUCTION
Direct-current motors are extensively used in variable-speed drives and positioncontrol
systems where good dynamic response and steady-state performance are
required. Examples are in robotic drives, printers, machine tools, process rolling mills,
paper and textile industries, and many others. Control of a dc motor, especially of the
separately excited type, is very straightforward, mainly because of the incorporation of
the commutator within the motor. The commutator brush allows the motor-devel ....etc

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difference between chopper fed drives and converter fed drives pdf

If the source of supply is d.c. (for example in a battery vehicle or a rapid transit system) a chopper-type converter is usually employed. The basic operation of a single-switch chopper was discussed in topic 2, where it was shown that the average output voltage could be varied by periodically switching the battery voltage on and of for varying intervals. The principal difference between the thyristor-controlled rectifier and the chopper is that in the former the motor current ....etc

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to get information about the topic speed control of dc motor full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-speed-control-of-dc-motor-using-pwm-technique

http://seminarsprojects.net/Thread-dc-motor-speed-control-using-bluetooth

http://seminarsprojects.net/Thread-speed-control-of-dc-motor-by-using-pid

http://seminarsprojects.net/Thread-speed-control-of-dc-motor-using-pulse-width-modulation

http://seminarsprojects.net/Thread-pwm-based-speed-control-of-dc-motor-using-8052-controller

http://s ....etc

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chopper fed dc motor drive



INTRODUCTION

Development of high performance motor drives are very essential for industrial applications. A high performance motor drive system must have good dynamic speed command tracking and load regulating response. DC motors provide excellent control of speed for acceleration and deceleration. The power supply of a DC motor connects directly to the field of the motor which allows for precise voltage control, and is neces ....etc

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CHAIN DRIVES IN LOW TORQUE DRIVES AND REDUCING PULSATIONS
INTRODUCTION TO DRIVES

Mechanical components used for power transmission. It may be belt, chain or gear depending on engine design parameters like - Distance between crankshaft and camshaft, engine maximum speed, engine-torque and engine construction cost. - Power transmission is done from one shaft to another shaft which may or may not rotate at same speed.

CHAIN DRIVES ....etc

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FOUR-QUADRANT CHOPPER DRIVE FOR UNIVERSAL DC MOTOR

#G-5, Ratna Complex, Ameerpet,
#310, OPP. Kalaniketan, Dilshukh Nagar


AIM:
The main aim of the project is to develop a speed control system for DC motor using four-quadrant chopper. Using four-quadrant chopper it is possible to demonstrate forward &reverse motoring and braking.
PURPOSE:
The purpose of the project is to implement a simple and cost effective process to control the speed of DC motors using the most popular technique four-quadrant ....etc

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please do send me the ppt of the project(pendrive to pendrive data transfer without using pc) ....etc

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