A four-pole, three-phase 415 V, 50 Hz induction motor has a rated rotor speed at 1445 rpm. The motor is connected to a constant torque load. (i) Sketch the IEEE recommended per-phase equivalent circuit for the three- phase induction motor. Label all the key components clearly. (ii) Determine the motor's synchronous speed in rpm, the motor's slip, and the frequency of the rotor current in Hertz. ii) If the operating frequency of the motor reduced to 40 Hz and the synchronous and rotor speed difference (n,- n,) is maintained at 55 rpm, determine the new motor's synchronous speed and rotor speed.

A four-pole, three-phase 415 V, 50 Hz induction motor has a rated rotor speed at 1445 rpm. The motor is connected to a constant torque load. (i) Sketch the IEEE recommended per-phase equivalent circuit for the three- phase induction motor. Label all the key components clearly. (ii) Determine the motor's synchronous speed in rpm, the motor's slip, and the frequency of the rotor current in Hertz. ii) If the operating frequency of the motor reduced to 40 Hz and the synchronous and rotor speed difference (n,- n,) is maintained at 55 rpm, determine the new motor's synchronous speed and rotor speed.

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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A three-phase, 460 V, 98hp 1,60 Hz, four-pole induction machine delivers rated output power at a slip of 0.05. Determine: (i) The synchonous speed. (V) speed at half Load (ii) The motor speed. (iii) The rotor frequency. (iv) The slip speed. ...A... -
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A three-phase, 460 V, 98hp 1,60 Hz, four-pole induction machine delivers rated output power at a slip of 0.05. Determine: (i) The synchonous speed. (V) speed at half Load (ii) The motor speed. (iii) The rotor frequency. (iv) The slip speed. ...A... -