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At full load, the current induced in the rotor conductor of a 3 phase squirrel cafe induction motor is-
- a)More than rated current
- b)Les than rated current
- c)nearly equal to rated current
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
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At full load, the current induced in the rotor conductor of a 3 phase...
According to Faraday’s law an emf induced in any circuit is due to the rate of change of magnetic flux linkage through the circuit. As the rotor winding in an induction motor are either closed through an external resistance or directly shorted by end ring, and cut the stator rotating magnetic field, an emf is induced in the rotor copper bar and due to this emf a current flows through the rotor conductor. Here the relative speed between the rotating flux and static rotor conductor is the cause of current generation; hence as per Lenz's law the rotor will rotate in the same direction to reduce the cause i.e. the relative velocity.
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At full load, the current induced in the rotor conductor of a 3 phase...
Explanation:
Rated current:
- Rated current is the maximum current that a motor is designed to carry under normal operating conditions.
- It is the current value specified by the manufacturer for the motor.
Full load current:
- Full load current is the current drawn by the motor when it is operating at its full load capacity.
- It is the current required to produce the rated output power of the motor.
Induction motor rotor conductor current:
- In a 3-phase squirrel cage induction motor, the current induced in the rotor conductor is proportional to the current in the stator windings.
- At full load, the rotor conductor current is nearly equal to the rated current of the motor.
- This is because the rotor current is dependent on the slip of the motor, which is determined by the load on the motor.
- As the load increases, the slip increases, leading to an increase in rotor current.
Therefore, the correct answer is option 'C' - nearly equal to rated current.
Rated current:
- Rated current is the maximum current that a motor is designed to carry under normal operating conditions.
- It is the current value specified by the manufacturer for the motor.
Full load current:
- Full load current is the current drawn by the motor when it is operating at its full load capacity.
- It is the current required to produce the rated output power of the motor.
Induction motor rotor conductor current:
- In a 3-phase squirrel cage induction motor, the current induced in the rotor conductor is proportional to the current in the stator windings.
- At full load, the rotor conductor current is nearly equal to the rated current of the motor.
- This is because the rotor current is dependent on the slip of the motor, which is determined by the load on the motor.
- As the load increases, the slip increases, leading to an increase in rotor current.
Therefore, the correct answer is option 'C' - nearly equal to rated current.
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At full load, the current induced in the rotor conductor of a 3 phase squirrel cafe induction motor is-a)More than rated currentb)Les than rated currentc)nearly equal to rated currentd)None of theseCorrect answer is option 'C'. Can you explain this answer?
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