Q3: A three-phase half-wave converter, which is used to control the speed of a separately excited d.c. motor rated at 100 kW, 600V, 2000 rpm. The converter is connected to a 3-phase 380 V, 60 Hz supply. The armature resistance is Ra = 0.051 ohm and the armature circuit inductance is La = 10 mH. The motor voltage constant is Ke 0 = 0.25 V/rpm. The rated armature current is 100A and the no load current is 10A. With the converter operates as a rectifier, and assuming that the motor current is continuous and ripple-free, determine: The no load speed when the firing angles: a= 0° and a= 30°.
Q3: A three-phase half-wave converter, which is used to control the speed of a separately excited d.c. motor rated at 100 kW, 600V, 2000 rpm. The converter is connected to a 3-phase 380 V, 60 Hz supply. The armature resistance is Ra = 0.051 ohm and the armature circuit inductance is La = 10 mH. The motor voltage constant is Ke 0 = 0.25 V/rpm. The rated armature current is 100A and the no load current is 10A. With the converter operates as a rectifier, and assuming that the motor current is continuous and ripple-free, determine: The no load speed when the firing angles: a= 0° and a= 30°.
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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Transcribed Image Text:Q3: A three-phase half-wave converter, which is used to control
the speed of a separately excited d.c. motor rated at 100 kW,
600V, 2000 rpm. The converter is connected to a 3-phase 380 V,
60 Hz supply. The armature resistance is Ra = 0.051 ohm and the
armature circuit inductance is La = 10 mH. The motor voltage
constant is Ke 0 = 0.25 V/rpm. The rated armature current is
100A and the no load current is 10A. With the converter operates
as a rectifier, and assuming that the motor current is continuous
and ripple-free, determine:
The no load speed when the firing angles: a= 0° and a= 30°.
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