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Question 4b continued (1) What is the mechanical torque developed if i = 34? (ii) At this current, calculate the back-emf (E) developed in the armature and the rotational speed (w) in rpm to 3 significant figures (iii) Determine the output mechanical power (PM) and overall efficiency (n) of the machine

Question 4b continued (1) What is the mechanical torque developed if i = 34? (ii) At this current, calculate the back-emf (E) developed in the armature and the rotational speed (w) in rpm to 3 significant figures (iii) Determine the output mechanical power (PM) and overall efficiency (n) of the machine

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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X=5 Y=4

In the next question, XY are the last two digits of your student number. For example, if your number is C1700123, X=2 and Y=3. b) Figure 5 shows a simplified electrical circuit of a DC motor. It delivers zero torque when running at 1500 rpm, with 150 + 10X V dc applied across its terminals. The motor's armature resistance is (2+0 You may assume iron and friction losses to be negligible. Ra m Figure 5 For example: if your number is C1700123, then V = 170V, R₂ = 2.20, if your number is C1700100, then V = 150V, R₂ = 2.00, Question 4b continues on the next page -7- EN1085 Question 4b continued (1) What is the mechanical torque developed if i = 3A? (ii) At this current, calculate the back-emf (E) developed in the armature and the rotational speed (w) in rpm to 3 significant figures Determine the output mechanical power (PM) and overall efficiency (n) of the machine
Transcribed Image Text:In the next question, XY are the last two digits of your student number. For example, if your number is C1700123, X=2 and Y=3. b) Figure 5 shows a simplified electrical circuit of a DC motor. It delivers zero torque when running at 1500 rpm, with 150 + 10X V dc applied across its terminals. The motor's armature resistance is (2+0 You may assume iron and friction losses to be negligible. Ra m Figure 5 For example: if your number is C1700123, then V = 170V, R₂ = 2.20, if your number is C1700100, then V = 150V, R₂ = 2.00, Question 4b continues on the next page -7- EN1085 Question 4b continued (1) What is the mechanical torque developed if i = 3A? (ii) At this current, calculate the back-emf (E) developed in the armature and the rotational speed (w) in rpm to 3 significant figures Determine the output mechanical power (PM) and overall efficiency (n) of the machine
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