theory of brake test on 3 phase induction motor ....etc

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I would like to get ppt on No load and Blocked rotor test on Single phase induction motor ....etc

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Introduction
Electromechanical device that converts electrical energy to mechanical energy
Mechanical energy used to e.g.
Rotate pump impeller, fan, blower
Drive compressors
Lift materials
DC Motors – Components
Field pole
North pole and south pole
Receive electricity to formmagnetic field
Armature
Cylinder between the poles
Electromagnet when current goes through it
Linked to drive shaft to drive the load
Commutator
Overturns current direction in armature
AC Motors – Synchronous motor[/ ....etc

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Theory for brake test on a 3 phase induction motor
Pls try to provide this ..... ....etc

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203/2014
Maximum : 100 marks
Time : 1 hour and 15 minutes

1.Cells are connected in parallel in order to :
(A)increase the voltage available
(B)reduce cost of wiring
(C )increase the current available
(D)reduce the time required to fully charge them after use

2.The combined resistance of two equal resistors connected in parallel is equal to :
(A)one half the resistance of one resistor
(B)twice the resistance of one resistor
(C )four times the resistance of one resistor
(D)one fourth the resistance of one resi ....etc

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INTRODUCTION
Three-phase induction motors
An induction motor or asynchronous motor is a type of alternating current motor where power is supplied to the rotor by means of electromagnetic induction. An electric motor converts electrical power to mechanical power in its rotor. In an induction motor this power is induced in the rotating device. An induction motor is sometimes called a rotating transformer because the stator is essentially the primary side of the transformer and the rotor is the secondary side. ....etc

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INTRODUCTION
Man is an ambitious creator. He has conquered the world of science and has reached to this 21ST century. In pre-cuts of perfection. He has cared much for automation and product quality which is directly co related to electronics.
In this fact developing society, electronic has come to stay as the most important branch of Engineering. Electronic devices are being used in almost all the industries for quality control and automation. They have become a fast replacement of present workers army which is engage ....etc

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I want to know about the protection of induction motor ....etc

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Speed Control of 3-Phase Induction Motor Using PIC18 Microcontrollers
INTRODUCTION
Induction motors are the most widely used motors forappliances, industrial control, and automation; hence,they are often called the workhorse of the motion industry.They are robust, reliable, and durable. When poweris supplied to an induction motor at the recommendedspecifications, it runs at its rated speed. However,many applications need variable speed operations. Forexample, a washing machine may use different speedsfor each wash cycle. Histor ....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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INTRODUCTION


Wind turbines convert the kinetic energy present in the wind into mechanical energy by means of producing torque.
Large scale wind power projects are an attractive alternative to conventional capacity expansion.
In the present scenario , most wind turbine manufacturers now equip power generating units by induction generators.
They are operated either at fixed speed or variable speed.
Generators driven by fixed speed turbines ....etc

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braketest on squiral cage induction motor 3phase ....etc

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AIM:
To separate the no load losses of a 3 phase squirrel cage induction motor as iron losses and mechanical losses.
NAME PLATE DETAILS:
3Ø induction motor
Auto Transformer
FUSE RATING:
No load :10% of rated current (full load current).
PRECAUTIONS:
(1) The autotransformer should be kept in minimum voltage position.
(2) the motor should not be loaded throughout the experiment.
....etc

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Aim
To conduct load test on three-phase squirrel cage induction motor.
Apparatus Required
Precaution
The motor should be started without any load.
Procedure
1) Connections are given as per the circuit diagram.
2) The TPSTS is closed and the motor is started using star-delta starter to run at rated speed.
3) At no load the speed, current, voltage and power are noted down.
4) By applying the load gradually with the help of spring balance and brake drum arrangements.
5) The speed, current, volta ....etc

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AIM:
To draw the performance characteristics of 3-phase squirrel cage induction motor by conducting load test.
THEORY:
A 3-phase induction motor consists of stator and rotor with the other associated parts. In the stator, a 3-phase winding is provided. The windings of the three phase are displaced in space by 120º.A 3-phase current is fed to the 3-phase winding. These windings produce a resultant magnetic flux and it rotates in space like a solid magnetic poles being rotated magnetically.

....etc

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i want the complete details of dis project
need a quick reply......... ....etc

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AIM:
To conduct the No Load test and Blocked rotor test on three phase squirrel cage induction motor and to draw the equivalent circuit.
FUSE RATING:
No load: 10% of rated current (Full load current)
Load: 125%of rated current (Full load current)
APPARATUS REQUIRED:
PRECAUTIONS:
The autotransformer should be kept at minimum voltage position.
PROCEDURE:
Note down the name plate details of motor.
1. For no-load open circuit test by adjusting autotransform ....etc

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I want to know basics about my given topic.. So please kindly known ....etc

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i need internal mechanism of practical circuit of meters in seperation of no load losses of three phase induction motor ....etc

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