The speed of a 20-HP, 300V, and 1800 rpm separately excited DC motor is controlled by a three-phase fullconverter drive. The field converter is also controlled by a three-phase full-converter and is set for maximum possible output voltage. The ac input is a three-phase, Y- connected 208V, 60 Hz supply. Let Ra = 0.25 ?, Rf = 245 ?, kv = 1.2 V/A-rad/sec. Neglect friction and assume armature and field currents to be constant. Determine the values of: Ca if the motor delivers rated power at the rated speed, (a) No-load speed if la at no-load is 10% of the (b) rated value, (c) Speed regulation, VR = (VNo-Load - VFull-Load )/ VNo-Load

The speed of a 20-HP, 300V, and 1800 rpm separately excited DC motor is controlled by a three-phase fullconverter drive. The field converter is also controlled by a three-phase full-converter and is set for maximum possible output voltage. The ac input is a three-phase, Y- connected 208V, 60 Hz supply. Let Ra = 0.25 ?, Rf = 245 ?, kv = 1.2 V/A-rad/sec. Neglect friction and assume armature and field currents to be constant. Determine the values of: Ca if the motor delivers rated power at the rated speed, (a) No-load speed if la at no-load is 10% of the (b) rated value, (c) Speed regulation, VR = (VNo-Load - VFull-Load )/ VNo-Load

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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