Bundle: Understanding Motor Controls, 4th + Mindtap Electrical, 2 Terms (12 Months) Printed Access Card
4th Edition
ISBN: 9780357097755
Author: Stephen L. Herman
Publisher: Cengage Learning
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Question
Chapter 31, Problem 5RQ
To determine
Identify why the wound rotor motor produces high starting torque per ampere.
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Students have asked these similar questions
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%
The reason why the starting torque of a series motor is higher than a shunt motor is
because the series motor has
O more current flowing through its armature
O a stronger net magnetic field around both coils during the inrush of stator current
Problem 5
1.
Where and why is a centrifugal switch used in a split-phase motor?
2.
Why and where is a capacitor used in the single-phase AC motor?
3. What type of motor would you select to perform each of the following jobs?
(a) Electric drill:
(b) Refrigerator:
(c) Hair driers and desk fans:
(d) Air Conditioner Fan:
(e) XY plotters and printers:
(f) Electric clock:
Chapter 31 Solutions
Bundle: Understanding Motor Controls, 4th + Mindtap Electrical, 2 Terms (12 Months) Printed Access Card
Ch. 31 - Prob. 1RQCh. 31 - Prob. 2RQCh. 31 - A wound rotor induction motor has a stator that...Ch. 31 - Name three factors that determine the amount of...Ch. 31 - Prob. 5RQCh. 31 - Explain why controlling the rotor current also...Ch. 31 - What is the function of a micro limit switch when...Ch. 31 - Prob. 8RQCh. 31 - What is rotor slip?
Ch. 31 - Prob. 10RQ
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Describe a washer machine motor you have experience with. What is it being used for, what power source it uses, and possibly it’s configuration. Explain why you picked this motor and if you have/need to perform(ed) any maintenance on it.arrow_forwardWhen a repulsion-start induction-run motor reaches about 75% of rated full-load speed, it stops operating as a repulsion motor and starts operating as a squirrel-cage motor. What must be done to cause the motor to begin operating as a squirrel-cage motor?arrow_forwardWhat type of single-phase motor develops the highest starting torque?arrow_forward
- In a no-load motor, a constant electromagnetic torque of 5 Nm is generated at t = 0. The engine reached 1800 revs in 4 seconds. Calculate motor inertia ignoring friction.arrow_forwardA motor is operating a load that requires a torque of 750 pounds per inch and is turning at a speed of 1575 RPM. How much horsepower is the motor producing?arrow_forwardQ A motor of 15 horsepower, has a code letter L, and is operated on a 400-volt line. Find the locked rotor currentarrow_forward
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