Questions: 1 - why does the speed fall slightly when the d.c. shunt motor is loaded? 2- What is the effect of armature reaction in on the speed of the motor? 3- Discuss the behavior of the efficiency output power curve? 4 - Enumerate different losses which take place in a loaded shunt motor ؟

Questions: 1 - why does the speed fall slightly when the d.c. shunt motor is loaded? 2- What is the effect of armature reaction in on the speed of the motor? 3- Discuss the behavior of the efficiency output power curve? 4 - Enumerate different losses which take place in a loaded shunt motor ؟

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter44: Use Of Reduced Voltage For Starting

Section: Chapter Questions

Problem 2SQ

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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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Questions:

1 - why does the speed fall slightly when the d.c. shunt motor is loaded?

2- What is the effect of armature reaction in on the speed of the motor?

3- Discuss the behavior of the efficiency output power curve?

4 - Enumerate different losses which take place in a loaded shunt motor ؟

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