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Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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A dc motor takes an armature current of 105 Amps at 480 V when running at 720 rpm. The resistance of the armature circuit is 0.2 ohm and the field resistance is 96 ohms. What is the torque developed in the armature?
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- 3. For the simple DC motor system shown below, prove ke kt if the inductance of the winding is negligible. = Supply Vs Voltage i Armature Current VR R Back emf L VLarrow_forwardA 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/minarrow_forwardA 440 volt d.c. The armature resistance of the motor is 0.25 ohm. It takes an armature current of 60 A at 750 RPM. So find the value of torque produced in the motor.arrow_forward
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