Interested to Buy Any Domain ? << Click Here >> for more details...
In a 3 phase squirrel cage induction motor why does rotor
rotate?
will 3 phase transformer rotate like a motor if it is
placed on bearings and powered up? give reason
- 10 Answers
- 28701 Views
- Siemens, I also Faced
- E-Mail Answers
Answer Posted / urvish mehta
firstly rotor of the induction motor rotates
due to the effect of rotating magnetic field
while in the transformers pulsating magnectic
field is produced not rotating...
The transformer components don't rotate (or move at all) simply because they are rigidly mounted. If you suspend a thin wire in the air close to an iron object, and pass a current through the wire, it will move, being attracted toward the iron by the magnetic field produced by the current.
Motors are specially arranged with the magnetic field in just the right spot so that it acts on the armature to cause rotation. Of course the armature rides on bearings so it can rotate.
Transformers have no components that are free to move, and the magnetic field is directed so as to induce a voltage in the secondary winding. That's what transformers do. Nothing inside the transformer is free to rotate.
Interestingly, if you ever get a chance to stand near a large transformer, you will hear a buzz or humming sound. This is the wires and iron core actually moving a very tiny amount as the magnetic field acts on them. There is no rotation though, just a small vibration back and forth as the magnetic field builds and collapses.
| Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
Explain how you intend to work under pressure to meet up with deadline target?
why output is out of phase in case of common emitter?
what is meant by motor startup supervision & motor load jam protection ?
Briefly describe means used by electricity suppliers to influence the flow of active and reactive power in power networks (one for each type)?
how to find the capacitance value of the motor while running??
what transformer we used normally and upto which kva?
How seriving & testing of the HT & LT breakers are done. What are the standard Ir values on which we can come to know the test is passed or failed?
- two pumps must work with them at the same time but if the first pump start the second pump must delayed for some time to start also , with motor rated power = 90 KW and rated voltage = 380 V and rated power factor = 0.85 lag please draw the power and control circuit for it and determine all circuit components parameters that you use it
How to design the earth grid for lightning protection in an industry
why Lightening Arrester Probe sharp at Top of telecom tower.
how unidirectional torque is produced in DC motor?
describe the constructional features of an auto transformer and its principle operation
What are the factor to be consider for CT selection in 132kV substation?
how maney type tempereture measurement ?
how can we calculate the ampacity of the electrical wire/cable. and what are the factors must be considered. pls. elaborate.
