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A 200 hp, 1500 V cumulative compound DC motor drives a load at a speed of 800 rpm and consumes 59.68 kW. If this motor has Ra = 0.075 N, R, = 750 N and Rs = 0.0025 N with fixed losses of 12 kW, determine the following: 1. The motor current, shunt field current and the armature current. 2. The back EMF (E,) and the efficiency.

A 200 hp, 1500 V cumulative compound DC motor drives a load at a speed of 800 rpm and consumes 59.68 kW. If this motor has Ra = 0.075 N, R, = 750 N and Rs = 0.0025 N with fixed losses of 12 kW, determine the following: 1. The motor current, shunt field current and the armature current. 2. The back EMF (E,) and the efficiency.

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 200 hp, 1500 V cumulative compound DC motor drives a load at a speed of 800 rpm, and consumes 59.68 kW. If this motor has R. 0.075 2, R, = 750 N and R, = 0.0025 N with fixed losses of 12 kW, determine the following: 1. The motor current, shunt field current and the armature current. 2. The back EMF (E,) and the efficiency. 3. The no-load speed and the speed regulation. 4. The developed torque (use the output power to find the developed torque). 5. The starting current if the motor is started without any starters.
Transcribed Image Text:A 200 hp, 1500 V cumulative compound DC motor drives a load at a speed of 800 rpm, and consumes 59.68 kW. If this motor has R. 0.075 2, R, = 750 N and R, = 0.0025 N with fixed losses of 12 kW, determine the following: 1. The motor current, shunt field current and the armature current. 2. The back EMF (E,) and the efficiency. 3. The no-load speed and the speed regulation. 4. The developed torque (use the output power to find the developed torque). 5. The starting current if the motor is started without any starters.
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