Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 44, Problem 2SQ
To determine
Explain the reason to connect a resistor in series with an armature only than with the entire shunt motor.
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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 ؟
What is the ratio of the outer cage torque to the inner cage torque of the indcution motor?
In Synchronous Motor Operation
How the regulating characteristics can be obtained from V curve?
Chapter 44 Solutions
Electric Motor Control
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.Similar questions
- what is dc shunt and series motor?arrow_forwardWhy induction motor cannot run on synchronous speed? Explain using slip.arrow_forwardA certain 5.5kW, 125V DC long shunt compound generator was operated as a shunt motor at no load for determination of stray power losses. With 135V equal to the generated emf at full load applied to the armature and at normal speed of 1700 rpm, the current input to the armature was found to be 2.5A. The armature, shunt field and series field resistances are 0.2- ohm, 25 ohm, and 0.25 ohm, respectively. Determine the efficiency of the generator at rated load.arrow_forward
- Define pull out torque and what are the points to be considered when the load on the synchronous motor is increased?arrow_forwardExplain why pole changing method of speed control cannot be used for slip ring induction motor?arrow_forwardExplain with proper diagrams, how does the increase of field resistance for speed control in a small shunt dc motor affects its operation?arrow_forward
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