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What is the efficiency of the mechanical system?

What is the efficiency of the mechanical system?

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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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)
Transcribed Image Text: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)
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