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a) A 120 V shunt motor takes 2 A at no load and 7 A when running at full load at 1200 rpm. The armature resistance is 0.8 Q and the shunt field resistance is 240 Q. Determine (i) rotational power loss no load speed (ii) (iii) speed regulation (iv) (v) power output efficiency b) The motor is converted into a long shunt differential compound motor by adding a series field winding with a resistance of 0.1 Q. If there is a 15% change in total flux when the motor develops the same torque, calculate power developed (vi) (vii) new speed

a) A 120 V shunt motor takes 2 A at no load and 7 A when running at full load at 1200 rpm. The armature resistance is 0.8 Q and the shunt field resistance is 240 Q. Determine (i) rotational power loss no load speed (ii) (iii) speed regulation (iv) (v) power output efficiency b) The motor is converted into a long shunt differential compound motor by adding a series field winding with a resistance of 0.1 Q. If there is a 15% change in total flux when the motor develops the same torque, calculate power developed (vi) (vii) new speed

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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a) A 120 V shunt motor takes 2 A at no load and 7 A when running at full load at 1200 rpm. The armature resistance is 0.8 Q and the shunt field resistance is 240 Q. Determine (i) rotational power loss no load speed (ii) (iii) speed regulation (iv) (v) power output efficiency b) The motor is converted into a long shunt differential compound motor by adding a series field winding with a resistance of 0.1 Q. If there is a 15% change in total flux when the motor develops the same torque, calculate power developed (vi) (vii) new speed
Transcribed Image Text:a) A 120 V shunt motor takes 2 A at no load and 7 A when running at full load at 1200 rpm. The armature resistance is 0.8 Q and the shunt field resistance is 240 Q. Determine (i) rotational power loss no load speed (ii) (iii) speed regulation (iv) (v) power output efficiency b) The motor is converted into a long shunt differential compound motor by adding a series field winding with a resistance of 0.1 Q. If there is a 15% change in total flux when the motor develops the same torque, calculate power developed (vi) (vii) new speed
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