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Why friction and windage loss for an induction motor remain constant with change of stator voltage?
Because the RPM remains same
What is heating time constant for an induction motor?
The heating time constant is the time that an induction motor takes to reach it's operational temperature.
Why three phase induction motor has uniform torque?
The 3-phase currents in the 3 coils of an induction motor will produce a steady rotating magnetic field.
How does the 3-phase induction motor acts like 2-phase induction motor if a phase is disconnected from supply?
yes the motor will run but will draw more current and the torque will be not constant means not smooth due to unbalanced current
How does single phase induction motor varies from 3 phase induction motor?
All induction motors require a rotating magnetic field in order to drive their rotors. Unlike a three-phase motor, a single-phase induction motor does not have a naturally-rotating magnetic field set up in the air gap between the stator and rotor and, so, this rotating magnetic field must be artificially created by stator windings that are roughly 90 degrees out of phase with each other. In most cases, this is done by inserting a capacitor in what is termed its 'auxiliary winding'.
Why friction and windage loss for an induction motor remain constant with change of stator voltage?
Because the RPM remains same
What is heating time constant for an induction motor?
The heating time constant is the time that an induction motor takes to reach it's operational temperature.
How does an induction motor develop torque?
The shaft of an AC induction motor rotates because of the torque created by the interaction between the magnetic field of the stator and the magnetic field of the rotor.
What happens to cooling if the rotation of an induction motor changes?
Cooling remains same irrespective of the motor rotational direction.
Does induction motor has rotor winding?
Yes, the induction motor has a rotor winding. It is usually one turn, shorted. This is how the magnetic fields generated in the stator induce a current in the rotor, which subsequently generates a torque from the opposing magnetic fields, stator to rotor.
What is meant by Slip of an induction motor?
Slip is referred to as the difference between the speed of the rotor and the speed of the rotating magnetic field in the stator of the induction motor. Speed of the rotor=n(1-s) Speed of the rotating magnetic field= f/p
What role does electric current play in a magnetic levitating train?
same principle as induction motor,rotor chases the rotating magnetic field.
Why three phase induction motor has uniform torque?
The 3-phase currents in the 3 coils of an induction motor will produce a steady rotating magnetic field.
How does the 3-phase induction motor acts like 2-phase induction motor if a phase is disconnected from supply?
yes the motor will run but will draw more current and the torque will be not constant means not smooth due to unbalanced current
Is a three phase induction motor self starting?
A three-phase motor has a steady rotating magnetic field generated by the stator coil, and the rotor just follows the field.
Does induction motor works on Electromagnetic induction?
Yes the Induction motor works on Electromagnetic induction principle.
What is the relationship between an induction motor and transformer?
In an induction motor, power is supplied to the rotor using a changing magnetic flux i.e. without any true conductive contact. Similarly, in a transformer, the power is transferred from the primary coil to the secondry one using a varying magnetic flux and the plates have no physical linkage. Hence, the similarity between an induction motor and a transformer is very basic i.e. they both use the phenomenon of electromagnetic induction to transfer power from one part to another.
