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Activity no. 14. DC Motors Problem Solving. 1. Determine the back emf and the torque developed for a 4-pole motor with 4 armature paths, 4800 conductors, flux per pole of 4.2 x 10° lines, running at a speed of 60 rpm. 2. The cutput torque of a de motor, running at a speed of 250 rpm, is 120 Nm. If the output power is 2,918 W, calculate the rotational loss. 3. Ad.s motor develops a back emf of 458 V. The machine has 6-poles and the armature is lap- connected with 354 conductors. The flux per pole is 0.05 WB. Calculate (i), the speed and (i) the gross torque developed by the armature.

Activity no. 14. DC Motors Problem Solving. 1. Determine the back emf and the torque developed for a 4-pole motor with 4 armature paths, 4800 conductors, flux per pole of 4.2 x 10° lines, running at a speed of 60 rpm. 2. The cutput torque of a de motor, running at a speed of 250 rpm, is 120 Nm. If the output power is 2,918 W, calculate the rotational loss. 3. Ad.s motor develops a back emf of 458 V. The machine has 6-poles and the armature is lap- connected with 354 conductors. The flux per pole is 0.05 WB. Calculate (i), the speed and (i) the gross torque developed by the armature.

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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Subject: Engineering Utilities

Please see tha image attached for the problems.

Assume that 1. Ia=10A and 3. Ia=100A

 

Activity no. 14. DC Motors Problem Solving. 1. Determine the back emf and the torque developed for a 4-pole motor with 4 armature paths, 4800 conductors, flux per pole of 4.2 x 10° lines, running at a speed of 60 rpm. 2. The output torque of a dc motor, running at a speed of 250o rpm, is 120 Nm. If the output power is 2,918 W, calculate the rotational loss. 3. Ad.s motor develops a back emf of 458 V. The machine has 6-poles and the armature is lap- connected with a64 conductors. The flux per pole is 0.05 WB. Calculate (i), the speed and (ii) the gross torque developed by the armature.
Transcribed Image Text:Activity no. 14. DC Motors Problem Solving. 1. Determine the back emf and the torque developed for a 4-pole motor with 4 armature paths, 4800 conductors, flux per pole of 4.2 x 10° lines, running at a speed of 60 rpm. 2. The output torque of a dc motor, running at a speed of 250o rpm, is 120 Nm. If the output power is 2,918 W, calculate the rotational loss. 3. Ad.s motor develops a back emf of 458 V. The machine has 6-poles and the armature is lap- connected with a64 conductors. The flux per pole is 0.05 WB. Calculate (i), the speed and (ii) the gross torque developed by the armature.
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