A 3-phase. 10-pole alternator has 90 slots, each containing 12 conductors. If the speed is 600 r.p.m. and the flux per pole is 0.1 Wb, calculate the line e.m.f. when the phases are (1) star connected (ii) delta connected. Assume the winding factor to be 0.96 and the flux sinusoidally distributed.

A 3-phase. 10-pole alternator has 90 slots, each containing 12 conductors. If the speed is 600 r.p.m. and the flux per pole is 0.1 Wb, calculate the line e.m.f. when the phases are (1) star connected (ii) delta connected. Assume the winding factor to be 0.96 and the flux sinusoidally distributed.

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

Synchronous Generator

In comparison to an asynchronous generator, it is a machine where the rotor speed is equal to the rotating magnetic field produced by the stator, i.e., mechanical speed is equal to the electrical speed, thus called synchronous, and not asynchronous.

Salient Pole Rotor

Salient pole rotor includes a large number of exposed poles mounted on a magnetic wheel. The construction of a bright pole is as shown in the image on the left. The proposed poles are made of metal laminations. The rotor winding is provided on these poles and is supported by pole shoes.

Question

10. A 3-phase. 10-pole alternator has 90 slots, each containing 12 conductors. If the speed is 600 r.p.m. and
the flux per pole is 0.1 Wb, calculate the line e.m.f. when the phases are (1) star connected (ii) delta
connected. Assume the winding factor to be 0.96 and the flux sinusoidally distributed.
[(i) 6.93 kV (ii) 4 kV] (Elect. Engg-II, Kerala Univ. 1979)

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