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.Q10 A 240 v, 4-pole shunt motor running at 1000 r.p.m. gives 15 h.p. with an armaturecurrent of 50 A and field current of 1 A. the armature winding is wave connected and has540 conductors. The armature resistance is 0.1 Q and the drop at each brush is 1 v. find (i)the useful torque (ii) the total torque (iii) useful flux per pole and (iv) iron and frictionallosses

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 2. The shunt field resistance is 250 N. Calculate for full load (i) the speed (ii) the useful torque.

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 2. The shunt field resistance is 250 N. Calculate for full load (i) the speed (ii) the useful torque.

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 separately excited D.C motor is rated for a full load torque of 100Nm. For an applied voltage of 240V and for flux (φ) per pole of 30 mWb, the no-load and full load speeds of the motor are 1595 r.p.m and 1195 r.p.m respectively. (a) Find the armature resistance (b) If the applied voltage and the flux per pole are reduced to 200V and 20mWb respectively, Find the corresponding full load speed.
A 4 pole, 220V dc shunt motor takes 32A from the supply mains and develops a power of 5.6KW in its armature. The field winding and armature resistances are 220ohms and 0.09ohm respectively. It has 540 lap wound conductors. If the flux per pole is 30mWb, calculate the torque developed in lb-ft.
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