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A dc shunt motor drives an elevator load which requires a constant torque of 300   N.m. The motor is connected to a 600 V dc supply and the motor rotates at 1500 rpm.   The armature resistance is 0.5 Ω .  (a) Determine the armature current.   (b) If the shunt field flux is reduced by 10 %, determine the armature current and the  speed of the motor.

A dc shunt motor drives an elevator load which requires a constant torque of 300   N.m. The motor is connected to a 600 V dc supply and the motor rotates at 1500 rpm.   The armature resistance is 0.5 Ω .  (a) Determine the armature current.   (b) If the shunt field flux is reduced by 10 %, determine the armature current and the  speed of the motor.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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A dc shunt motor drives an elevator load which requires a constant torque of 300  

N.m. The motor is connected to a 600 V dc supply and the motor rotates at 1500 rpm.  

The armature resistance is 0.5 Ω . 

(a) Determine the armature current.  

(b) If the shunt field flux is reduced by 10 %, determine the armature current and the 

speed of the motor.

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