i) The field of separately excited DC Motor is excited by a separate single phase voltage source of 240V-RMS at 60HZ and single phase full wave uncontrolled rectifier, whereas the armature is connected to a single phase voltage source of 230V-RMS at 50HZ through a single phase full wave controlled rectifier. Name plate details of the motor shows Ra = 0.14 Q, Rf = 3502, Motor constant K = 1.35 %3D VIA-rad/sec. The motor is taking a rated armature current of 8A, and the Motor takes a 6% of the full load current under no load. Calculate the following. а. What happens to the speed of the Motor if the armature converter is fired at lower firing angles? b. Torque produced by the motor under 0.75 % of the full load. с. Calculate the speed of the Drive system, when the armature converter is fired with a firing angle of 130°. d. Calculate the firing angle of the armature converter to run the motor at 1460 RPM, under at its 60% of full load.
i) The field of separately excited DC Motor is excited by a separate single phase voltage source of 240V-RMS at 60HZ and single phase full wave uncontrolled rectifier, whereas the armature is connected to a single phase voltage source of 230V-RMS at 50HZ through a single phase full wave controlled rectifier. Name plate details of the motor shows Ra = 0.14 Q, Rf = 3502, Motor constant K = 1.35 %3D VIA-rad/sec. The motor is taking a rated armature current of 8A, and the Motor takes a 6% of the full load current under no load. Calculate the following. а. What happens to the speed of the Motor if the armature converter is fired at lower firing angles? b. Torque produced by the motor under 0.75 % of the full load. с. Calculate the speed of the Drive system, when the armature converter is fired with a firing angle of 130°. d. Calculate the firing angle of the armature converter to run the motor at 1460 RPM, under at its 60% of full load.
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
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Chapter1: Introduction
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Answer part ( d ) only
Transcribed Image Text:i)
The field of separately excited DC Motor is excited by a separate single phase
voltage source of 240V-RMS at 60HZ and single phase full wave uncontrolled
rectifier, whereas the armature is connected to a single phase voltage source of
230V-RMS at 50HZ through a single phase full wave controlled rectifier. Name
plate details of the motor shows Ra = 0.14 Q, Rf = 3502, Motor constant K = 1.35
%3D
VIA-rad/sec. The motor is taking a rated armature current of 8A, and the Motor
takes a 6% of the full load current under no load.
Calculate the following.
а.
What happens to the speed of the Motor if the armature converter is fired
at lower firing angles?
b.
Torque produced by the motor under 0.75 % of the full load.
с.
Calculate the speed of the Drive system, when the armature converter is
fired with a firing angle of 130°.
d.
Calculate the firing angle of the armature converter to run the motor at
1460 RPM, under at its 60% of full load.
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