Tools

To study the torque speed characterstics of three phase induction motor.

The shape of torque/slip curve of an induction motor is:
Introducing the external resistance increases____.
i. Speed
ii. Output power
iii. Starting torque
Introducing the external resistance decreases____.
i. Speed
ii. Output power
iii. Starting torque
What happens to the slip of a three-phase induction motor as the load on the motor increases?
When a three phase induction motor is rotating at steady state. Then if the load is increased then the slip will _____ and the efficiency will
In a 3-phase IM, maximum torque of 300Nm occur at slip of 10%. The torque at slip of 5% would be____ .
For standard 3-phase IM, the rotating direction of motion is-
If Ns is the synchronous speed and S the slip, then the actual running speed of a three- phase induction motor will be-
A 3-phase 440v, 50Hz induction motor has 4% slip. The frequency of rotor e.m.f. will be-
A 6 pole, 50 Hz, 3-phase induction motor is running at 950 rpm. It has rotor copper loss of 5 KW. The rotor input will be -