A 2-pole, induction motor supplies 15kW (50Hz) a load at a speed of 2950 r/min.a. Calculate the motor's slipb. What is the induced torque of the motor in N.m?c. Calculate the operating speed of the motor when its torque is doubled.d. How much power will be supplied by the motor when the torque is doubled?

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Answered: A 2-pole, induction motor supplies 15kW…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 13RQ: A squirrel-cage induction motor is operating at 1175 RPM and producing a torque of 22 Ib-ft. What is...

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Similar questions

Name three factors that determine the torque produced by an induction motor.
A 40Hp, 230V, 8 pole, 25HZ induction motor is running at 355 rpm at rate load. If the motor has the efficiency of 84.2% at full load, determine the torque in N-m due to mechanical loss. Stator loss amounts to 1000W.
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A dc series motor drives a load a 30rev/s and takes a current of 10A when the supply voltage is 400V. If the total resistance of the motor is 2ohms and the iron, friction and windage losses amount to 300W, determine the efficiency of the motor.
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A large 3-phase, 4000 V, 60 Hz, squirrel-cage induction motor draws a current of 385 A and a total active power of 2344 kW when operating at full-load. The corresponding speed is accurately measured and is found to be 709.2 RPM. The stator is connected in wye and the resistance between two stator terminals is 0.10 Ω. The total iron losses are 23.4 kW and the windage and friction losses are 12 kW. Calculate the following: a) The power factor at full load.b) The active power supplied to the rotor.c) The total I²R losses in the rotor.d) The load mechanical power (kW), torque (kN-m) and efficiency (%).
Given a motor with the following parameters: Rw = 12 Ω (winding resistance) Kv = 5.67mV/RPM (back e.m.f. constant) Kt = 552 gm-cm/A (Torque constant) Rf = 0.0236 gm-cm/RPM (mechanical friction) (a) What voltage should be provided for unloaded speed of 4000 RPM? (b) Let the motor drive two similar generators. What speed should be at 16Volts?
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single-phase induction motor employed for a mechanical work at a rate of 45 HP. Its electrical power will be 33.57 kW. A)Estimate the amount of line current necessary to power the motor if the line voltage is 460 Volts assuming 100% efficiency and a power factor of 1. ( B)Now, estimate the necessary line current for this motor if its power factor drops to 0.65. Assume the efficiency and mechanical power as the same. C)What do these calculations indicate about the importance of maintaining a high-power factor value in an AC circuit?
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