Answered: A 3 phase , Y-connected , 220 V , 10…

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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Type your question here Q1// Answer the following question. 1- A 8-pole a separately excited generator, having the wave-wound armature winding has 16 slots, when running at 600 r.p.m. has a terminal voltage of 400 V and an induced voltage of 414.72 V. The armature resistance is 0.12, the flux per pole is 36 mWb, and there is a brush contact voltage drop of 1V at each brush. Calculate the value of armature current and the number of conductors for each slot. 2- A six-pole, DC shunt generator is wave-connected, supplies a load of A 12 kW, 240 V and an induced voltage of 250 V. If this machine is now lap-connected and flux per pole increasing by 20%, all other things remaining the same, calculate the e.m.f generated and load current.

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A 3 phase , Y-connected , 220 V , 10 H.P , 6 pole , induction motor has the following constants per phase referred to stator R1=0.3 ohm , R2=0.15 ohm , X1=0.5 ohm , x2=0.2 , Xm=12 ohm The total friction and windage losses are 1000 W . For slip of 0.02 compute Tout and efficiency ?