In case of dc motor, maximum mechanical power is developed when back emf equals (a) the applied voltage (b) half the applied voltage (c) one third of the applied voltage (d) double the applied voltage

In case of dc motor, maximum mechanical power is developed when back emf equals (a) the applied voltage (b) half the applied voltage (c) one third of the applied voltage (d) double the applied voltage

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 3RQ

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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.

Question

In case of dc motor, maximum mechanical power is developed when back emf equals
(a) the applied voltage
(b) half the applied voltage
(c) one third of the applied voltage
(d) double the applied voltage

Branch of science that deals with the stationary and moving bodies under the influence of forces.

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