Electric Motor Control
10th Edition
ISBN: 9781305177611
Author: Herman
Publisher: Cengage
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Textbook Question
Chapter 36, Problem 3SQ
Does reversing the secondary rotor leads mean that the direction of rotation will reverse?
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8. What happens to the magnitude of the magnetic
field on the Rotor when an induction machine
speed increases closer to synchronous speed?
the rotor speeding up has on effect on the
magnetic field on the rotor
the rotor speeding up increases the magnetic
field on the rotor
the rotor speeding up decreases the magnetic
field on the rotor
The frequency of the rotor current fr = - 40 Hz with a slip of -0.667. What happens in the motor if the rotor frequency is negative?
In which type of induction motor, external resistance can be connected?
squirrel cage
Slip ring
capacitor start
capacitor start and run
Chapter 36 Solutions
Electric Motor Control
Ch. 36 - Are the secondary resistors connected in three...Ch. 36 - Do secondary resistors on starters with three or...Ch. 36 - Does reversing the secondary rotor leads mean that...Ch. 36 - If one of the secondary resistor contacts (S2)...Ch. 36 - In Figure 362, how many different interlocking...Ch. 36 - Referring to Figure 364, why is it not possible to...Ch. 36 - Prob. 7SQCh. 36 - If there is a locked rotor in the secondary...Ch. 36 - Why is it necessary to remove the jumpers in...Ch. 36 - Prob. 10SQ
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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
- There may be more than one answerarrow_forwardWhy does a salient rotor have ?more polesarrow_forwarda. Explain how a rotating magnetic field is produced in a three-phase induction motor. b. Explain the rotor action on a three-phase squirrel cage motor when the load increases from NO-LOAD to rated FULL- LOADarrow_forward
- What are the following statements are true for a three-phase induction motor? I. Three-phase induction motor stator winding is fed from a single-phase supply II. Stator carries a three-phase winding III. Rotor carries a short circuited winding a. I,II and III b. I only c. I and II only d. II and IIIarrow_forwardCompare between cylindrical rotors and salient pole rotors?arrow_forwardWhat is the difference between wound rotor induction machines and squirrel cage machinesarrow_forward
- What effect does increasing rotor circuit resistance have on the breakdown torque and on slip at which breakdown occurs.arrow_forwardthe magnetic strengh of the field poles on a perment magnet DC motor cannot be varied a- true b- falsearrow_forward2- A 4-pole, wave-wound d.c. shunt generator has an armature winding consisting of 300 turns each of 0.0020. The armature resistance is a) 0.152 b)0.62 c) 0.30 d) none of abovearrow_forward
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