The rotor of an electric motor has an angular velocity of 3570 rpm when the load and power are cut off. The 65-kg rotor, which has a centroidal radius of gyration of 175mm, until it reaches the maximum speed of 5250 rpm. Knowing that the kinetic friction results in a couple of magnitude 4.5 N.m exerted on the rotor, determine the number of revolutions that the rotor executes, before achieving its maximum speed and the time it took. (The final answer should be in two decimal places with correct units)
The rotor of an electric motor has an angular velocity of 3570 rpm when the load and power are cut off. The 65-kg rotor, which has a centroidal radius of gyration of 175mm, until it reaches the maximum speed of 5250 rpm. Knowing that the kinetic friction results in a couple of magnitude 4.5 N.m exerted on the rotor, determine the number of revolutions that the rotor executes, before achieving its maximum speed and the time it took. (The final answer should be in two decimal places with correct units)
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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Question
The rotor of an electric motor has an angular velocity of 3570 rpm when
the load and power are cut off. The 65-kg rotor, which has a centroidal
radius of gyration of 175mm, until it reaches the maximum speed of 5250
rpm. Knowing that the kinetic friction results in a couple of magnitude
4.5 N.m exerted on the rotor, determine the number of revolutions that
the rotor executes, before achieving its maximum speed and the time it
took.
(The final answer should be in two decimal places with correct units)
Transcribed Image Text:6 in.
A
10 in.
D
8 in.
C
15 in. -
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