Four Quadrant Operation
Motor is driving a hoist consisting of a cage with or without load, a rope wound on to a drum to hoist the cage and a balance weight of magnitude greater than that of the empty cage but less than that of the loaded cage.

The arrow in the figure indicates the actual directions of the motor torque, load torque and motion in four quadrants.

The load torque of the hoisting mechanism is of active type and assumed to be constant due to negligible friction and windage for low speed hoist.

Speed torque curve of the hoist is r ....etc

[:=Read Full Message Here=:]

ppt of simulation of four quadrant speed control of bldc motor

ABSTRACT

Brushless DC (BLDC) motor drives are becoming more popular in industrial, traction applications. This makes the control of BLDC motor in all the four quadrants very vital- The motor is operated in four steady state operating modes of torque-speed plane. To control a BLDC machine it is generally required to measure the speed and position of rotor by using the sensor because the inverter phases, acting at any time, must be commutated depending on the rotor position. Simulat ....etc

[:=Read Full Message Here=:]

ppt on four quadrant operation and speed control of bldc motor on simulink/matalb ....etc

[:=Read Full Message Here=:]

....etc

[:=Read Full Message Here=:]

Four Quadrant operation of DC Drives



4Q OPERATION: LIFT SYSTEM

Convention
Upward motion of the cage: Positive speed
Weight of the empty cage < Counterweight
Weight of the full-loaded cage > Counterweight

Introduction to electric braking

Braking of Electrical motor is frequently
employed to perform following operation.
(1)To stop a running motor
(2) To stop and run the motor in reverse
direction
(3) To limit the speed of the motor when
it is over hauled by an active ....etc

[:=Read Full Message Here=:]

INTRODUCTION

The fully controlled converter can produce a reversible direct output voltage with output current in one direction, and in terms of a conventional voltage/ current diagram(Fig.1:) is said to be capable of operation in two quadrants, the first and fourth. Such a range of operation is useful for certain purposes, examples being the control of a dc torque motor, i.e. a motor used to provide unidirectional torque with reversible rotation (Fig.2), and a DC transmission page link between two AC systems in which power can be transmitted ....etc

[:=Read Full Message Here=:]

To get full information or details of simulation of four quadrant operation of three phase induction motor please have a look on the pages

http://seminarsprojects.net/Thread-four-quadrant-control-of-switched-reluctance-motors-full-report?pid=13856&mode=threaded

if you again feel trouble on simulation of four quadrant operation of three phase induction motor please reply in that page and ask specific fields ....etc

[:=Read Full Message Here=:]

To get full information or details of four quadrant operation of three phase induction motor please have a look on the pages

http://seminarsprojects.net/Thread-four-quadrant-control-of-switched-reluctance-motors-full-report?pid=13856&mode=threaded

http://seminarsprojects.net/Thread-four-quadrant-control-of-switched-reluctance-motors-full-report?pid=27437&mode=threaded

if you again feel trouble on four quadrant operation of three phase induction motor please reply in that page and ask specific fields ....etc

[:=Read Full Message Here=:]

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

[:=Read Full Message Here=:]

DC MOTOR CONTROL USING CHOPPER


ABSTRACT

The speed of separately excited DC motor can be controlled from below and up to rated speed using chopper as a converter. The chopper firing circuit receives signal from controller and then chopper gives variable voltage to the armature of the motor for achieving desired speed. There are two control loops, one for controlling current and another for speed. The controller used is Proportional-Integral type which removes the delay and provides fast control. Modeling of ....etc

[:=Read Full Message Here=:]