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A 20-hp, 240-V, 76-A, 900 r/min series motor has a field winding of 33 turns per pole. Its armature resistance is 0.09 , and its field resistance is 0.06 2. The mag- netization curve expressed in terms of magnetomotive force versus Е at 900 r/min is given by the following table: EA, V F, A. turns 95 150 500 1000 188 212 1500 2000 229 2500 243 3000 Armature reaction is negligible in this machine. (a) Compute the motor's torque, speed, and output power at 33, 67, 100, and 133 percent of full-load armature current. (Neglect rotational losses.)

A 20-hp, 240-V, 76-A, 900 r/min series motor has a field winding of 33 turns per pole. Its armature resistance is 0.09 , and its field resistance is 0.06 2. The mag- netization curve expressed in terms of magnetomotive force versus Е at 900 r/min is given by the following table: EA, V F, A. turns 95 150 500 1000 188 212 1500 2000 229 2500 243 3000 Armature reaction is negligible in this machine. (a) Compute the motor's torque, speed, and output power at 33, 67, 100, and 133 percent of full-load armature current. (Neglect rotational losses.)

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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A 20-hp, 240-V, 76-A, 900 r/min series motor has a field winding of 33 turns per pole. Its armature resistance is 0.09 , and its field resistance is 0.06 2. The mag- netization curve expressed in terms of magnetomotive force versus Е at 900 r/min is given by the following table: 95 150 500 1000 EA, V F, A. turns 188 212 229 1500 2000 2500 243 3000 Armature reaction is negligible in this machine. (a) Compute the motor's torque, speed, and output power at 33, 67, 100, and 133 percent of full-load armature current. (Neglect rotational losses.)
Transcribed Image Text:A 20-hp, 240-V, 76-A, 900 r/min series motor has a field winding of 33 turns per pole. Its armature resistance is 0.09 , and its field resistance is 0.06 2. The mag- netization curve expressed in terms of magnetomotive force versus Е at 900 r/min is given by the following table: 95 150 500 1000 EA, V F, A. turns 188 212 229 1500 2000 2500 243 3000 Armature reaction is negligible in this machine. (a) Compute the motor's torque, speed, and output power at 33, 67, 100, and 133 percent of full-load armature current. (Neglect rotational losses.)
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