j) A 6-pole lap wound D.C. shunt generator has 70 slots with 18 conductors per slot. The ratio of pole are to pole pitch is 0.6. The diameter of the bore of the pole shoe is 0.35m. The length of the pole shoe is 0.3m. Calculate the speed at which it runs if the air gap flux density is 0.32 wb/m2 and the e.m.f. induced in the armature is 510V.

j) A 6-pole lap wound D.C. shunt generator has 70 slots with 18 conductors per slot. The ratio of pole are to pole pitch is 0.6. The diameter of the bore of the pole shoe is 0.35m. The length of the pole shoe is 0.3m. Calculate the speed at which it runs if the air gap flux density is 0.32 wb/m2 and the e.m.f. induced in the armature is 510V.

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 d.c. generator has an armature e.m.f. of 100 V when the useful flux per pole is 20 mWb and the speed is 800 r.p.m. calculate the generated e.m.f. (i) with the same flux and a speed of 1000 r.p.m. (ii) with a flux per pole of 24 mWb and a speed of 900 r.p.m.
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Q1) A 4 poles de separate excited generator has 56 slots, and each armature coil has 8 turns. The wire used to wound the armature has a resistivity = 6.2 x 10-8 2.m, and the average length of each turn = 1.8 m, the wire cross-section area = 5 mm². If the flux per pole = 0.012 web, find the load voltage when the generator is wave wound, driven at 110 rad/sec, and supplies 7 A. 3+10/ 50+8/ Q2) A series de motor has flux characteristics given by p= web, when I represent the field's current. If the supply voltage = 100 V, the armature resistance = 0.7 £2, and the field resistance = 0.32. The motor takes 25 A when driving a load at 1450 R.P.M. Find load torque, starting torque, and no-load speed. Draw the required circuit diagram. Q3) Two de generators, A and B, connected in parallel with the following characteristics: GA: P=3 Kw; Vr = 200 V, ra = 192. GB: E=210 V; I, = 20 A, ra = 0.8 2. Find the maximum possible load power, the power supplied to the load at floating conditions. Q4) Answer…
Question No.4 A dc generator has an armature emf of 100 V when useful flux/pole is 20 mWb, and a speed of 800 rpm. The generated emf at a speed of 1000 rpm and same flux is
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