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.
hotors a) What power is developed by a motor that turns at 1200 rpm and has a torque of 3.0 N-m?
2. A 2-pole, 50 Hz induction motor supplies 15 kW to a load at a speed of 2950 rpm. a. What is the motor's slip? b. What is the induced torque in the motor in N-m under these conditions? c. What will be the operating speed of the motor be if its torque is doubled? d. How much power will be supplied by the motor when the torque is doubled?
A 400 V DC series motor develops shaft torque of 200 Nm at 80 percent efficiency while running at 1200 rpm. The current drawn by the motor in amperes is?
A 600 V series motor takes 120 A and operates at 900 rpm when the load is80 HP. If the effective circuit resistance is 0.20 ohm, calculate the HPoutput of the motor when the current drops to 90 A. assuming that the fluxis reduced by 20 %.
A dc series motor having a resistance of 1.0 ohm between terminals runs at 800 rpm at 200V with a current of 15A. At what speed will it run when connected in series with a 5-ohm resistance, the current maintained at 15A?
pole. 50-Hz. 3-ϕ induction motor has a full-load speed of 950 rpm. At half load its speed would be ..... rpm a) 475 b) 500 c) 975 d)1000
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A 250 V series motor has an armature resistance of 0.2 ohm and a series-fieldresistance of 0.18 ohm. If the speed is 6oo RPM when the current is 32 amps.What will be the motor speed when the load is reduced so that the current is18 amps, under which condition the percent flux change is 50 % of the percentcurrent change.
A 2-pole, 50HZ induction motor supplies 15kW to a load at a speed of 2900 rpm. Calculate: a) The motor slip b) The induced torque in the motor c) The operating speed of the motor if the torque is increased by 150%. d) The power when the torque increases by 150%
• A 120-V series motor runs at 2000 rpm at full load and takes a current of 12 A. The armature-winding resistance is 0.3 2 and the series field resistance is 0.2 Ω. A diverter resistance of 0.2 Ω is connected across the series field, and the load on the motor is adjusted. If the motor now takes 20 A, what is the new speed of the motor (2358 rpm)? Determine the torque developed in each case (6.532 Nm, 9.07 Nm).
(c) A dc series motor, connected to a 440 V supply, runs at 500 rpm when taking a current of 40 A. Calculate the value of resistance which, when inserted in series with the motor, will reduce the speed to 300 rpm, the gross torque being then half its previous value. The resistance of the motor is 0.2 ohm. Assume flux to be proportional to field current.

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