There are many methods used for starting induction motors and synchronous machines. For the following three methods of starting three-phase motors, explain how the starting method works and state the type of motor the starter is designed for. Support your answer with illustrations: Star-Delta Rotor Resistance Induction starting (with damper windings).

There are many methods used for starting induction motors and synchronous machines. For the following three methods of starting three-phase motors, explain how the starting method works and state the type of motor the starter is designed for. Support your answer with illustrations: Star-Delta Rotor Resistance Induction starting (with damper windings).

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter35: Harmonics 916

Section: Chapter Questions

Problem 3RQ: Would a positive-rotating harmonic or a negative-rotating harmonic be more harmful to an induction...

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L-1). The 3-phase wound-rotor induction motor has .... . a) high starting torque b) low starting current c) both "a" and "b" d) neither "a" nor "b" L-2). The 3-phase wound-rotor induction.........a) motor has a wire wound rotor b) motor's rotor can be connected to an external resistive load by way of slip rings and brushes c) motor requires more maintenance than the 3-phase squirrel-cage induction motor d) all of the above L-3). The 3-phase wound-rotor induction motor's rotor circuit's resistance should be adjusted so it is__________ during starting. a) low b) high c) either "a" or "b" d) neither "a" nor "b" L-4). Will a 3-phase wound-rotor induction motor start with no external circuit connected to its rotor leads? a) yes b) no
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will give like!!
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