A 250 V dc shunt motor has an armature resistance of 0.2 Ω and a field resistance of 100 Ω. When the motor is operated on no-load at rated voltage. It draws an armature current of 5 A and runs at 1200 rpm. When a load is coupled to the motor, it draws total line current of 50 A at rated voltage, with a 5 % reduction in the air-gap flux due to armature reaction. Voltage drop across the brushes can be taken as 1 V per brush under all operating conditions. The speed of the motor, in rpm, under this loaded condition, is closest to
A 250 V dc shunt motor has an armature resistance of 0.2 Ω and a field resistance of 100 Ω. When the motor is operated on no-load at rated voltage. It draws an armature current of 5 A and runs at 1200 rpm. When a load is coupled to the motor, it draws total line current of 50 A at rated voltage, with a 5 % reduction in the air-gap flux due to armature reaction. Voltage drop across the brushes can be taken as 1 V per brush under all operating conditions. The speed of the motor, in rpm, under this loaded condition, is closest to
Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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A 250 V dc shunt motor has an armature resistance of 0.2 Ω and a field resistance of
100 Ω. When the motor is operated on no-load at rated voltage. It draws an armature
current of 5 A and runs at 1200 rpm. When a load is coupled to the motor, it draws
total line current of 50 A at rated voltage, with a 5 % reduction in the air-gap flux due
to armature reaction. Voltage drop across the brushes can be taken as 1 V per brush
under all operating conditions. The speed of the motor, in rpm, under this loaded
condition, is closest to?
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