The figure below shows the per-phase equivalent circuit, referred to the stator. of a 400V.50 Hz. four-pole, star-connected, wound-rotor, three-phase induction motor.What is the ratio of motor maximum torque to starting torque?j1200.54 Ω.j 0.56 ΩEmm.27.00.43/50

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Answered: The figure below shows the per-phase…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter32: Three-phase Motors

Section: Chapter Questions

Problem 6RQ: Name three factors that determine the torque produced by an induction motor.

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The name plate of single phase induction motor has following data output 373W,230V, frequency 50Hz. Input current 2.9A and power factor is 0.71. Speed 1420 rpm What is efficiency of motor.
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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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The figure below shows the per-phase equivalent circuit, referred to the stator. of a 400V. 50 Hz. four-pole, star-connected, wound-rotor, three-phase induction motor. What is the ratio of motor maximum torque to starting torque? j120 0.54 Ω. j 0.56 Ω E mm. 27.0 0.43/50