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3. A compound motor develops a torque of 271 lb-ft when it is operating at 1200 rpm, under which condition its armature current is 215 amperes. What will be the developed horsepower of the motor if the load is increased so that it slows down to 1120 rpm in which case armature current changes to 238 amperes and the total flux increases by 8 percent?

3. A compound motor develops a torque of 271 lb-ft when it is operating at 1200 rpm, under which condition its armature current is 215 amperes. What will be the developed horsepower of the motor if the load is increased so that it slows down to 1120 rpm in which case armature current changes to 238 amperes and the total flux increases by 8 percent?

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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Please answer question number 3. Thank you
1. A long shunt compound generator has the following parameters: R, = 0.1 0, Rse = 0.05 Q and Rsh = 120 Q. This machine supplies power aggregate dc load of 10 kW. At this load the armature generates 246 volts. Determine the terminal voltage 2. A four-pole shunt motor has an armature with a total of 282 conductors. If each pole face has an area of 25 in? and the flux density is 50,000 lines per sq. inch. Calculate the power developed by the motor in horsepower for an armature current of 85 A and a speed of 1420 rpm. (Assume a wave-connected armature winding). 3. A compound motor develops a torque of 271 lb-ft when it is operating at 1200 rpm, under which condition its armature current is 215 amperes. What will be the developed horsepower of the motor if the load is increased so that it slows down to 1120 rpm in which case armature current changes to 238 amperes and the total flux increases by 8 percent?
Transcribed Image Text:1. A long shunt compound generator has the following parameters: R, = 0.1 0, Rse = 0.05 Q and Rsh = 120 Q. This machine supplies power aggregate dc load of 10 kW. At this load the armature generates 246 volts. Determine the terminal voltage 2. A four-pole shunt motor has an armature with a total of 282 conductors. If each pole face has an area of 25 in? and the flux density is 50,000 lines per sq. inch. Calculate the power developed by the motor in horsepower for an armature current of 85 A and a speed of 1420 rpm. (Assume a wave-connected armature winding). 3. A compound motor develops a torque of 271 lb-ft when it is operating at 1200 rpm, under which condition its armature current is 215 amperes. What will be the developed horsepower of the motor if the load is increased so that it slows down to 1120 rpm in which case armature current changes to 238 amperes and the total flux increases by 8 percent?
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