Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 43, Problem 5SQ
To determine
Explain the reasons for connecting the power to the shunt field even when the motor is not operating.
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What happens to a series connected direct current motor if its field winding opens at full load?
How to avoid the effect of the high current at starting of the Motor?
a.
variable resistor is connected in series with Armature circuit
b.
variable resistor is connected in parallel with Armature circuit
c.
variable resistor is connected in series with field circuit
d.
None of the above
Clear my choice
Synchronous motor when the load is taken completely while working at full load in all properties Does it change properties? Explain.
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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 the purpose of the split-ring commutator in an electric motor that operates on DC power?arrow_forwardIn Synchronous Motor Operation How the regulating characteristics can be obtained from V curve?arrow_forward(Im) Does the excitation circuit current change as the motor current changes? explain the reasons. (DC shunt motor).arrow_forward
- 21.a. When field voltage is controlled to provide a method of variable speed control, the system is using aconcept known as fieldA. stability.B. drive.C. bias.D. weakening. 21.b. What type of motor has the same wire diameter in both the field and the armature coils?A. Interpole-woundB. Series-woundC. Compound-woundD. Shunt-woundarrow_forwardA 240-volt shunt motor takes 5 amperes on no-load. The armature resistance is 0.25 ohm and the field resistance is 200 ohms. Calculate the efficiency when taking full load current of 50 amperes and the percentage change in speed between no-load and full-load.arrow_forward
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