Answered: If we increase the torque (Tm) value,…

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If we increase the torque (Tm) value, how does the idle and load running state of the induction motor change?

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 6RQ: Name three factors that determine the torque produced by an induction motor.

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Concept explainers

Speed control of motor

Speed control by DC motor-speed controller is required to realize variable speed drive. Whenever a motor drives a particular load, it is called drive, and variable speed drive refers to a load requiring variable speed. All this is obtained by a DC motor speed controller.

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If we increase the torque (Tm) value, how does the idle and load running state of the induction motor change?

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Name three factors that determine the torque produced by an induction motor.
If we increase the torque (Tm) value, how does the idle and load running state of the induction motor change for rotor and stator current?
If static voltage of a squirrel cage induction motor is reduced to 50 percent of it's rated value, torque developed is reduced by how many percentage of its full load value ?
Can we get maximum torque at start in an induction motor, how? Which type of motor develops higher starting torque?
How to address the low starting torque issue of induction motor?
Compare the breakdown torque and locked-rotor torque with the nominal torque of the squirrel-cage induction motor.
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A three phase, 50Hz, 6-pole squirrel cage induction motor runs at 960-rpm on full load. The stand still rotor resistance and reactance per phase are 0.01 ohm and 0.05 ohm respectively. Express the maximum torque developed in terms of full load toque. Find the slip at which the maximum torque occurs.
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