A 130 kW, 470 V separately excited de motor has the following rated values (nameplate): 1940rpm (full load), 300 A (full load), 0.0935 N armature resistance. The motor efficiency is 90%. Armature and field windings have separate power supplies. Assume the magnetic circuit isnot saturated and neglect armature reaction. Ignore all mechanical losses in the calculation oftorque. 2. Motor operation variable speed controlCompute, for the following operating conditions, the speed for no load and rated load, theelectromagnetic power and torque, and the speed regulation.(a) rated armature voltage, rated armature current, rated field current.(b) 30% rated voltage, rated armature current, rated field current.(c) rated voltage, rated armature current, 65 % rated field current.Draw the speed-torque characteristics for the 2 operating voltages in (a)-(b).

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rpm (full load), 300 A (full load), 0.0935 armature resistance. The motor efficiency is 90 %. Armature and field windings have separate power supplies. Assume the magnetic circuit is not saturated and neglect armature reaction. Ignore all mechanical losses in the calculation of torque.

rpm (full load), 300 A (full load), 0.0935 armature resistance. The motor efficiency is 90 %. Armature and field windings have separate power supplies. Assume the magnetic circuit is not saturated and neglect armature reaction. Ignore all mechanical losses in the calculation of 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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