On the nameplate of a serial excitation DC motor, 11 kW, 240 V, 50 A, 1350 rpm values are written. The sum of excitation and armature circuit internal resistances of this motor is 0.3. According to this, a) What is the motion voltage and torque generated when the motor is running at rated conditions? b) What happens to copper, friction losses and efficiency when the engine is running at rated conditions? c) Motor load is reduced to 25 A armature current. In this case, the applied voltage is the same What will be the motor speed and the torque produced?
On the nameplate of a serial excitation DC motor, 11 kW, 240 V, 50 A, 1350 rpm values are written. The sum of excitation and armature circuit internal resistances of this motor is 0.3. According to this, a) What is the motion voltage and torque generated when the motor is running at rated conditions? b) What happens to copper, friction losses and efficiency when the engine is running at rated conditions? c) Motor load is reduced to 25 A armature current. In this case, the applied voltage is the same What will be the motor speed and the torque produced?
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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On the nameplate of a serial excitation DC motor, 11 kW, 240 V, 50 A, 1350 rpm values are written. The sum of excitation and armature circuit internal resistances of this motor is 0.3. According to this, a) What is the motion voltage and torque generated when the motor is running at rated conditions? b) What happens to copper, friction losses and efficiency when the engine is running at rated conditions? c) Motor load is reduced to 25 A armature current. In this case, the applied voltage is the same What will be the motor speed and the torque produced?
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