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Q2: A 600 V, 50 A d.c. separately-excited motor is fed form a three- phase half-controlled rectifier. The armature resistance of the motor is 0.10, the armature inductance is 40 mH and the machine constant Ke o is 0.3 V/rpm. The rectifier is fed form 400 V, 50 Hz three-phase supply. It is required to calculate: (a) The no-load speed when the firing angle is 30° and the no-load current is 5 A. (b) The firing angle to obtain a speed of 1600 rpm.

Q2: A 600 V, 50 A d.c. separately-excited motor is fed form a three- phase half-controlled rectifier. The armature resistance of the motor is 0.10, the armature inductance is 40 mH and the machine constant Ke o is 0.3 V/rpm. The rectifier is fed form 400 V, 50 Hz three-phase supply. It is required to calculate: (a) The no-load speed when the firing angle is 30° and the no-load current is 5 A. (b) The firing angle to obtain a speed of 1600 rpm.

Introductory Circuit Analysis (13th Edition)
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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Q2: A 600 V, 50 A d.c. separately-excited motor is fed form a three- phase half-controlled rectifier. The armature resistance of the motor is 0.1 Q, the armature inductance is 40 mH and the machine constant Ke þ is 0.3 V/rpm. The rectifier is fed form 400 V, 50 Hz three-phase supply. It is required to calculate: (a) The no-load speed when the firing angle is 30° and the no-load current is 5 A. (b) The firing angle to obtain a speed of 1600 rpm.
Transcribed Image Text:Q2: A 600 V, 50 A d.c. separately-excited motor is fed form a three- phase half-controlled rectifier. The armature resistance of the motor is 0.1 Q, the armature inductance is 40 mH and the machine constant Ke þ is 0.3 V/rpm. The rectifier is fed form 400 V, 50 Hz three-phase supply. It is required to calculate: (a) The no-load speed when the firing angle is 30° and the no-load current is 5 A. (b) The firing angle to obtain a speed of 1600 rpm.
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