Jm 2r motor gear hoist F,=mg
Delmar's Standard Textbook Of Electricity
7th Edition
ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter30: Dc Motors
Section: Chapter Questions
Problem 6RQ: What is CEMF?
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Question
An electric motor moves an object of a weight; the system is show in Figure 1. Given that Jm = 0.2 kgm2, Jd = 2000 kgm2, r = 0.5 m, the gear ratio ai = wm/wd = 40 and mass of the object, m is 20kg. (assume a loss-less system and g = 9.8m/s2)
- Obtain the equivalent moment of inertia, Jeq seen at the motor side.
- Obtain the equivalent load torque, seen at the shaft of the motor
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