What is the efficiency of the mechanical system? Torque-current curve0.50.40.30.20.10.51152.5Torque (kg/cm)Equation of curve is (using equation of a line):I = 0.17142t + 0.03t given as 0.5kg:1 = 0.17142(0.5) + 0.03 So,I = 0.12A at 0.5kgFrom the data:V = 12VNo load current Io = 0.03AFull load current IgL = 0.39AMax efficiency current Imax = 0.11ASo, electrical powver drawn by motorUnder no load: Po = V: x Io = 12 x 0.03 = 0.36 WattsUnder full load: Pgi = V; x Igı = 12 x 0.39 = 4.68 WattsUnder max. efficiency current: Pmax = Vt x Imar = 12 x 0.11 = 1.32 WattsCurrent (A)

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Engineering

Electrical Engineering

What is the efficiency of the mechanical system?

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.8MCQ: An ac resistance is higher than a dc resistance. True False

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Question

What is the efficiency of the mechanical system?

Torque-current curve
0.5
0.4
0.3
0.2
0.1
0.5
1
15
2.5
Torque (kg/cm)
Equation of curve is (using equation of a line):
I = 0.17142t + 0.03
t given as 0.5kg:
1 = 0.17142(0.5) + 0.03 So,
I = 0.12A at 0.5kg
From the data:
V = 12V
No load current Io = 0.03A
Full load current IgL = 0.39A
Max efficiency current Imax = 0.11A
So, electrical powver drawn by motor
Under no load: Po = V: x Io = 12 x 0.03 = 0.36 Watts
Under full load: Pgi = V; x Igı = 12 x 0.39 = 4.68 Watts
Under max. efficiency current: Pmax = Vt x Imar = 12 x 0.11 = 1.32 Watts
Current (A)

Branch of science that deals with the stationary and moving bodies under the influence of forces.

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