Example 11: A d.c. generator with 480 armature conductors supplies a current of 144 A. The brushes are given an actual lead of 10o. Calculated demagnetizing amp turns per pole found to be 28 percentage of cross magnetizing amp turns per pole, determine number of pole if armature field is wave wound Solution :

Example 11: A d.c. generator with 480 armature conductors supplies a current of 144 A. The brushes are given an actual lead of 10o. Calculated demagnetizing amp turns per pole found to be 28 percentage of cross magnetizing amp turns per pole, determine number of pole if armature field is wave wound Solution :

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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For the design we assuming following parameters 1) winding : Lap 2) simplex 3) Number of slots : 16 , single turn coil with 2 conductors per slot 4) Number of poles = 4
The total conductor of the direct current generator shown in the figure is 1440. The length of the armature is 30cm, the magnetic flux of a pole is 0.8 Tesla and the armature rotates at a speed of 4 m / s. Find the value of the voltage generated by the armature according to the position in the figure.
Q2. A 4-pole, wave-wound armature has 72 slots with two coil-sides per slot, each coil has four turns. If the flux per pole is 20 mWb and the armature rotates at 720 rpm, what is the induced emf across the armature? (Ans. 276.48 V)
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q10
➡ A four-pole Series connected generator has a lap connected armature with 728 conductors. If the generator supplies one hundred incandescence lamp (100 V, 60W). The series field and armature resistance are 0.2 ohms and 0.015 ohms respectively. Find the series field current.
A separately-excited dc generator develops 288 volts at a certain flux and at a certain speed. What should be the new generated voltage in volts for this machine if the speed is changed to 85 % of the original value and the flux is increased by 67 % from the original value?