Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Chapter 32, Problem 2RQ
What is an amortisseur winding and what function does it serve?
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A three-phase supply connected to the stator of a three-phase induction machine, creates a:
stationary magnetic field.
O rotating magnetic field.
O alternating magnetic field.
constant electric field.
A 480V, 3-phase, 50Hz 6-pole Induction motor with a rated power of 10KVA.
(i) Calculate the synchronous speed in rad/sec (ws)
(ii) Determine the rotor speed in rpm, if the % slip is 2.5%
also find the
efficiency
NPSHR
Lastly, what is the motor power requirement referring to question
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- What type of field winding is made with many turns of small wire?arrow_forwardHow much current is flowing in the secondary winding?arrow_forwardA 75-hp, three-phase squirrel-cage induction motor is connected to 480 volts. The motor has a NEMA code D. What is the starting current for this motor?arrow_forward
- Explain how to set the neutral plane position by using the compensating winding.arrow_forwardA 75 HP, three-phase squirrel cage induction motor is connected to 480 volts. The motor has a NEMA code D. What is the starting current for this motor?arrow_forwardName Date A shunt motor draws current of 60 A from a 120V source rotating at 1800 RPM. If the armature resistance is 0.2 Ohms and the field resistance is 50 Ohms Find: AThe fleld current B. The armature current. C. The counter EMF. D. The developed power in H.P E. The developed Torque.arrow_forward
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