A 350 V shunt motor runs at it's normal speed of 720 r/min when the armature current is 90 A. The resistance of the armature is 0.3 ohm. Determine the following: (1) The kΦ1 of the motor. If armature current is 45 A and a resistance of 0.4 ohm is connected in series with the armature and the shunt field remaining constant determine the following: (2) The new kΦ2 of the motor. (3) The new speed of the motor in r/min If the current is 45 A and the shunt field is reduced to 75% of it's normal value by increasing resistance in the field circuit, determine the following: (4) The new kΦ2 of the motor. (5) The new speed of the motor in r/min
A 350 V shunt motor runs at it's normal speed of 720 r/min when the armature current is 90 A. The resistance of the armature is 0.3 ohm. Determine the following: (1) The kΦ1 of the motor. If armature current is 45 A and a resistance of 0.4 ohm is connected in series with the armature and the shunt field remaining constant determine the following: (2) The new kΦ2 of the motor. (3) The new speed of the motor in r/min If the current is 45 A and the shunt field is reduced to 75% of it's normal value by increasing resistance in the field circuit, determine the following: (4) The new kΦ2 of the motor. (5) The new speed of the motor in r/min
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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A 350 V shunt motor runs at it's normal speed of 720 r/min when the armature current is 90 A. The resistance of the armature is 0.3 ohm. Determine the following:
(1) The kΦ1 of the motor.
If armature current is 45 A and a resistance of 0.4 ohm is connected in series with the armature and the shunt field remaining constant determine the following:
(2) The new kΦ2 of the motor.
(3) The new speed of the motor in r/min
If the current is 45 A and the shunt field is reduced to 75% of it's normal value by increasing resistance in the field circuit, determine the following:
(4) The new kΦ2 of the motor.
(5) The new speed of the motor in r/min
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