Answered: 3.8 An induction motor having 8 poles…

3.8 An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50 Hz, the emf in the rotor will have a frequency of (a) 1.5 Hz (c) 51.5 Hz (b) 48.5 Hz (d) 75 Hz

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Concept explainers

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.

Question

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3.8 An induction motor having 8 poles runs at
727.5 rpm. If the supply frequency is 50 Hz, the
emf in the rotor will have a frequency of
(a) 1.5 Hz
(b) 48.5 Hz
(c) 51.5 Hz
(d) 75 Hz

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