If the DC machine is held constant at 3000 rpm. The DC voltage is 250V. If the field is held constant with 250V. Is ?this machine generator or motor Motor O generator O None of the mentioned Any of the mentioned O O O O

If the DC machine is held constant at 3000 rpm. The DC voltage is 250V. If the field is held constant with 250V. Is ?this machine generator or motor Motor O generator O None of the mentioned Any of the mentioned O O O O

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

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter13: Heating Control Devices

Section: Chapter Questions

Problem 6RQ

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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

If the DC machine is held constant at
3000 rpm. The DC voltage is 250V. If
the field is held constant with 250V. Is
?this machine generator or motor
Motor O
generator O
None of the mentioned O
Any of the mentioned O

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