A brake test is carried out with a balance and a direct current motor. The purpose of this experiment is to calculate the torque on the motor shaft. The following values were obtained in the experiment. U=220 volts., I=107 amps, n = 1200 rpm. The length from the axis of the motor shaft to the point where the brake lever presses on the scale is L=80 cm. and the weight read on the balance G = 20 Kg. is Accordingly, calculate the following values: a) the shaft power taken from the shaft of the motor, b) the electrical power drawn by the motor from the mains c) motor total losses and motor efficiency
A brake test is carried out with a balance and a direct current motor. The purpose of this experiment is to calculate the torque on the motor shaft. The following values were obtained in the experiment. U=220 volts., I=107 amps, n = 1200 rpm. The length from the axis of the motor shaft to the point where the brake lever presses on the scale is L=80 cm. and the weight read on the balance G = 20 Kg. is Accordingly, calculate the following values: a) the shaft power taken from the shaft of the motor, b) the electrical power drawn by the motor from the mains c) motor total losses and motor efficiency
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A brake test is carried out with a balance and a direct current motor. The purpose of this experiment is to calculate the torque on the motor shaft. The following values were obtained in the experiment. U=220 volts., I=107 amps, n = 1200 rpm. The length from the axis of the motor shaft to the point where the brake lever presses on the scale is L=80 cm. and the weight read on the balance G = 20 Kg. is Accordingly, calculate the following values:
a) the shaft power taken from the shaft of the motor,
b) the electrical power drawn by the motor from the mains
c) motor total losses and motor efficiency
Calculate
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