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An elevator is driven by a 380 V, 50 Hz, 1480 rev/min, 4-pole, star-connected three- phase induction motor with variable
Posted: Mon May 09, 2022 7:55 am
by answerhappygod
- An Elevator Is Driven By A 380 V 50 Hz 1480 Rev Min 4 Pole Star Connected Three Phase Induction Motor With Variable 1 (23.05 KiB) Viewed 26 times
An elevator is driven by a 380 V, 50 Hz, 1480 rev/min, 4-pole, star-connected three- phase induction motor with variable voltage variable frequency (VVVF) controller. The motor has a rotor resistance and reactance 0.250 and 0.812 respectively. If the motor runs at 560 rev/min and the supply frequency is reduced to 35 Hz, by neglecting the stator impedance, evaluate (a) the slip, (b) the rotor current, and (c) the motor output torque. (3 marks) (3 marks) (2 marks)