A 200 V d.c shunt motor takes 45 A.When running at 750 r.p.m. It has anarmature resistance of 0.15Q. Determine the speed and armature current if thefield flux is weakened by 15%.Neglect the brush contact drop.

Back emf in DC shunt motor is given by Eb = V-lara also , back emf is given by Eb = KnϕN Torque T…

Answered: A 200 V d.c shunt motor takes 45 A.When…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter25: Electromagnetic Induction

Section: Chapter Questions

Problem 85A

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A 200 V d.c shunt motor takes 45 A.When running at 750 r.p.m. It has an armature resistance of 0.15Q. Determine the speed and armature current if the field flux is weakened by 15%.Neglect the brush contact drop.