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 WrnJm2rmotorgearhoistF,=mgFigure 1:

Given data: Jm=0.2 kgm2Jd=2000 kgm2ai=40m=20 kgg=9.8 m/s2

Answered: Jm 2r motor gear hoist F,=mg

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Electrical Engineering

Jm 2r motor gear hoist F,=mg

Delmar's Standard Textbook Of Electricity

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ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter30: Dc Motors

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Question

An electric motor moves an object of a weight; the system is show in Figure 1. Given that J_m = 0.2 kgm², J_d = 2000 kgm², r = 0.5 m, the gear ratio a_i = w_m/w_d = 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, J_eq seen at the motor side.
Obtain the equivalent load torque, seen at the shaft of the motor

Wrn
Jm
2r
motor
gear
hoist
F,=mg
Figure 1:

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