Q8 an armature of a 6-pole machine 75 cm in diameter has 664 conductors each having aneffective length of 30 cm and carrying a current of 100A. if 70% of total conductors liesimultaneously in the field of average flux density 0.85 Wb/m2« calculate (i) armaturetorque (ii) horse power putput at 250 r.p.m.Q9 A 100 h.p., 500 v shunt motor has 4 poles and a 2 circuit wave winding with 492armature conductors. The flux is 50 mWb per pole and the full-load efficiency 92% thearmature and commutating field windings have a total resistance of 0.1 N. The shunt fieldresistance is 250 N. Calculate for full load (i) the speed (ii) the useful torque.

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Answered: 9A 100 h.p.. 500 v shunt motor ha

Engineering

Electrical Engineering

9A 100 h.p.. 500 v shunt motor ha

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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Concept explainers

Motor Load, Torque, and Power Quality Requirement

An electric motor is a gadget that changes electrical energy into mechanical energy over to follow up on a mechanical burden. The weight set on the motor because of this mechanical movement is known as motor load. Appropriately matching the motor burden to the engine is vital to forestall harm to the engine or wasteful and unnecessary expensive activity. Engines perform such undertakings as moving a thing starting with one spot then onto the next, cutting it, changing its shape, etc. The motors might be evaluated as far as a few variables including power yield, voltage, current, and temperature. Harm to an engine might happen when it is worked under over the top engine load contrasted with its appraised limit.

Question

Q8 an armature of a 6-pole machine 75 cm in diameter has 664 conductors each having an
effective length of 30 cm and carrying a current of 100A. if 70% of total conductors lie
simultaneously in the field of average flux density 0.85 Wb/m2« calculate (i) armature
torque (ii) horse power putput at 250 r.p.m.
Q9 A 100 h.p., 500 v shunt motor has 4 poles and a 2 circuit wave winding with 492
armature conductors. The flux is 50 mWb per pole and the full-load efficiency 92% the
armature and commutating field windings have a total resistance of 0.1 N. The shunt field
resistance is 250 N. Calculate for full load (i) the speed (ii) the useful torque.

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