A three-phase 6-pole; 60-cycle, 230-volt wound rotor induction motor has its stator connected in delta and its rotor in wye. There are 75 percent as many rotor conductors as stator conductors. Calculate the voltage and frequency between slip rings if normal voltage is applied to the stator when (A) the rotor is at rest, and (B) the rotor slip is 0.04.

A three-phase 6-pole; 60-cycle, 230-volt wound rotor induction motor has its stator connected in delta and its rotor in wye. There are 75 percent as many rotor conductors as stator conductors. Calculate the voltage and frequency between slip rings if normal voltage is applied to the stator when (A) the rotor is at rest, and (B) the rotor slip is 0.04.

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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Winding and Constructions

Alternating Current (AC) winding is generally of the 3-phase type due to the inherent advantages of the 3-phase machine. Armature coils must be connected to the yield balance (equivalent in magnitude and 2/3 of the series phase difference of the rod) 3-phase electromotive forces (emf). The armature should be divided into step-bands to start with slots around the perimeter.In the construction of AC machines, the frame is used as an external protective shield to protect it from environmental conditions. The frame also serves as the outer perimeter, allowing the interior to be easily placed. The static state section of the devices is the stator winding attached stator.

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DEGREE: BS ELECTRICAL ENGINEERING

COURSE: AC MACHINES

Note: Please solve in this way. Given>Missing>Illustration>Solution>FinalAnswer. Please include symbols, units, formulas, step by step solution, please don't cut the solution. Thank you!

(#15) A three-phase 6-pole; 60-cycle, 230-volt wound rotor induction motor has its stator connected in delta and its rotor in wye. There are 75 percent as many rotor conductors as stator conductors. Calculate the voltage and frequency between slip rings if normal voltage is applied to the stator when

(A) the rotor is at rest, and

(B) the rotor slip is 0.04.

[Answer: 298.7V; 60 Hz; 11.95V; 2.4 Hz]

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