The speed of a 150 hp, 650V, 1750 rpm, separatley excited DC motor is controlled by 3-phase, 460v, 50Hz supply full - converter. The rated armature current of the motor is 170A. The motor parameters are: R, = 0.0992, L = 0.73 mH, and K, O = 0.33 V / rpm. Neglect the losses in converter system, determine: A) No - load speed at firing angle a = 0 ° and a = 30 °. Assume that the no - load armature current is 10% of the rated current? B) The firing angle to obtain rated speed and rated current?
The speed of a 150 hp, 650V, 1750 rpm, separatley excited DC motor is controlled by 3-phase, 460v, 50Hz supply full - converter. The rated armature current of the motor is 170A. The motor parameters are: R, = 0.0992, L = 0.73 mH, and K, O = 0.33 V / rpm. Neglect the losses in converter system, determine: A) No - load speed at firing angle a = 0 ° and a = 30 °. Assume that the no - load armature current is 10% of the rated current? B) The firing angle to obtain rated speed and rated current?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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The speed of a 150 hp, 650V, 1750 rpm, separatley excited DC motor is controlled by 3-phase, 460v, 50Hz supply full - converter. The rated armature current of the motor is 170A. The motor parameters are: R, = 0.0992, L = 0.73 mH, and K, O = 0.33 V / rpm. Neglect the losses in converter system, determine: A) No - load speed at firing angle a = 0 ° and a = 30 °. Assume that the no - load armature current is 10% of the rated current? B) The firing angle to obtain rated speed and rated current?
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