by an electric motor. Determine the power of driving motor, if the max. load of 8 kN is hoisted at a speed of 50 m/min. and the efficiency of the drive is 80%; Also determine the torque on the drum shaft and the speed of the motor in r.p.m. Determine also the diameter of the shaft. The drive gear whose dia. is 450 mm is mounted at the end of the shaft such that it overhangs the nearest bearing by 150 mm

by an electric motor. Determine the power of driving motor, if the max. load of 8 kN is hoisted at a speed of 50 m/min. and the efficiency of the drive is 80%; Also determine the torque on the drum shaft and the speed of the motor in r.p.m. Determine also the diameter of the shaft. The drive gear whose dia. is 450 mm is mounted at the end of the shaft such that it overhangs the nearest bearing by 150 mm

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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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

Problem 2.5: A hoisting drum 0.5 m in diameter is keyed to a shaft which
is supported in two bearings and driven through a 12:1 reduction ratio
by an electric motor. Determine the power of driving motor, if the max.
load of 8 kN is hoisted at a speed of 50 m/min. and the efficiency of the
drive is 80%; Also determine the torque on the drum shaft and the speed
of the motor in r.p.m. Determine also the diameter of the shaft. The drive
gear whose dia. is 450 mm is mounted at the end of the shaft such that it
overhangs the nearest bearing by 150 mm
Motor
Pinion
Drum
Gear
150

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