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Crawling is caused by harmonics effects on the motors rotating magnetic field. If harmonic levels are high enough they can become the dominating factor in the rotating magnetic field causing the motor to run at a much lower speed than designed.
http://www2.sea.siemens.com/NR/rdonlyres/4058E086-2AFD-4C47-B9B1-0FCF4428FA39/0/MAGNETICNOISEININDUCTIONMOTORS.pdf
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How single-phase induction motor classified?
The single phase induction motors are made self starting by providing an additional flux by some additional means. Now depending upon these additional means the single phase induction motors are classified as: 1.Split phase induction motor. 2.Capacitor start inductor motor. 3.Capacitor start capacitor run induction motor. 4. Shaded pole induction motor.
Theory for brake test on three phase induction motor?
why three phase induction motor is delta connected
What are the different types of induction motors?
DOL(Direct Online starting) Star Delta starting Auto transformer starting Above methods are for squirrel cage induction motor Rotor resistance starting is used for wound rotor or slip ring induction motor
What is squirrel cage induction generator?
Squirrel cage type is a type of Induction motor. It tells that the rotor is "squirrel cage" type. Another type of induction motor is with "slip ring" type of rotor. Squirrel cage type is most widely used Induction motor.
Load test on 3 phase induction motor?
When you do a load test on a 3-phase induction motor you are checking the power factor, viz slip, and efficiency of the motor. You can test various loads with this test.
What is crawling in induction motor?
Crawling refers to a condition wherein there is a slow rotation of the rotor caused due to the presence of harmonic content in the supply.
What is crawling in electrical machine?
sometimes particularly the squirel cage type rotor run stably & speeds as low as 1/7 of their synchronous speed.This phenomenon is known as crawling of an induction motor.
Does induction motor works on Electromagnetic induction?
Yes the Induction motor works on Electromagnetic induction principle.
What is induction motor?
Induction motor is an AC electric motor which uses electromagnetic induction to induce the electric current in the rotor to produce torque.
What is a decripition of Nikola Tesla induction electric motor?
AC Induction Motor
Applications of induction motor?
A single phase induction motor is mainly used in fans.It is capacitor start capacitor run induction motor.In three phase induction motor squirrel cage induction motor is mainly used in elevators,lifts,cranes.slip ring induction motor is mainly used in electrically driven ships.
Difference between transformer and induction motor?
1. Induction Motor has an air-gap but transformer has no air gap rather it is mutually link. 2. Induction Motor has high no-load current than transformer. 3. Induction Motor is a dynamic device. 4. Induction Motor has high power factor.
Can a Squirrel Cage Induction motor can be converted to Slip Ring Induction Motor?
yes
Why you are using star connected induction motor and delta connected induction motor?
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Application of induction motor in industry?
Induction motor used in industries for variable speed machines . Induction motor has always lagging power factor. Less cost compared to syn. Motor.
What type of motor is used in ceiling fan?
single-phase induction motor is used in ceiling fan.
What is the useful of open end winding of induction motor?
Standard induction motor has a closed squirrel cage rotor, where as open ended induction motor has split phase rotor.
