Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar 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
Understanding Motor Controls
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
- Name three factors that determine the amount of torque developed by a wound rotor induction motor.arrow_forwardA motor develops 189 ft-lb of torque at 1745 RPM. What is the horse-power output of the motor?arrow_forwardA three phase induction motor operates with a rotor speed of 1440 rpm and develops a torque of 66.32NM at full load. The full load power output is * O 10 kw O 9 kw O 8 kW O 11 kWarrow_forward
- 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_forward
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