Q1) Answer the following: -1- if T=295 NM for 4-pole dc motor having 774 conductors, wave wound ,24mwb fluxper pole then la =results in decreasingas shown in2-Hence, beyond certain limit any further decrease intheconsequently, thecharacteristic curvefigure below.BArmature ReactionDropOhmicVoltage DropDInternalCharacteristicExternalCharacteristicLoad Current (I)3-in figure below Armature flux lines is due to theField poles areGNA, MNAAmaturs4-If the DC shunt generator has an induced open circuit voltage of 127 v and thegenerator is delivers current of 342 A, the on load voltage is 120 v and field resistance 15ohm then RaD5- However, even when the field current is zero, some amount of emf is generated(Represented byfact that there exists some residual magnetism in the field poles.in the figure below) this initially induced emf is due to theN.N.N.Increase inspeed (N)Field Current (1,)No-load voltage (E)Generated Voltage (Eg)o Terminal Voltage (V)>No load votage E)

Answered: Image /qna-images/answer/a3ff1445-9519-475e-a0e7-ae58adb8e2d5.jpg

Answered: Q1) Answer the following: - 1- if T=295…

Q1) Answer the following: - 1- if T=295 NM for 4-pole dc motor having 774 conductors, wave wound ,24mwb flux per pole then la =

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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Flux is exactly proportional to L2 times field current in a d.c generator. The generator operates at a speed of 200 revolutions per minute and has a flux of 62 mWb.f per pole. The generator is lap wound with 1500 conductors in series; determine the e.m.f. produced. If the winding is wave wound, calculate the change in excitation current required to get the same voltage as previously stated. The machine has six poles.
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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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Topic Electrical Machines - Magnetic & E... For a coil, each turn faces (2t4 – t³ – 2t) milliwebers of flux. The value of induced EMF in coil for 100 turns coil at 2 sec is, (in Volts).