A rotor is driven by a co-axial motor through a single plate clutch, both sides of the plate being effective. The external and internal diameters of the plate are respectively 260 mm and 180 mm and the total spring load pressing the plates together is 590 N. The motor armature and shaft has a mass of 1000 kg with an effective radius of gyration of 300 mm. The rotor has a mass of 1300 kg with an effective radius of gyration of 200 mm. The coefficient of friction for the clutch is 0.25. The driving motor is brought up to a speed of 1350 rpm. When the current is switched off and the clutch suddenly engaged, determine: 6.1 6.2 the final speed of motor and rotor the time to reach this speed, the kinetic energy lost during the period of slipping. the torque on the armature shaft and rotor if it is assumed that a constant resisting torque of 60 N-m is present 6.3 6.4

A rotor is driven by a co-axial motor through a single plate clutch, both sides of the plate being effective. The external and internal diameters of the plate are respectively 260 mm and 180 mm and the total spring load pressing the plates together is 590 N. The motor armature and shaft has a mass of 1000 kg with an effective radius of gyration of 300 mm. The rotor has a mass of 1300 kg with an effective radius of gyration of 200 mm. The coefficient of friction for the clutch is 0.25. The driving motor is brought up to a speed of 1350 rpm. When the current is switched off and the clutch suddenly engaged, determine: 6.1 6.2 the final speed of motor and rotor the time to reach this speed, the kinetic energy lost during the period of slipping. the torque on the armature shaft and rotor if it is assumed that a constant resisting torque of 60 N-m is present 6.3 6.4

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

Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.

Question

A rotor is driven by a co-axial motor through a single plate clutch, both sides of the plate being
effective. The external and internal diameters of the plate are respectively 260 mm and 180 mm
and the total spring load pressing the plates together is 590 N. The motor armature and shaft
has a mass of 1000 kg with an effective radius of gyration of 300 mm. The rotor has a mass of
1300 kg with an effective radius of gyration of 200 mm. The coefficient of friction for the clutch
is 0.25. The driving motor is brought up to a speed of 1350 rpm. When the current is switched
off and the clutch suddenly engaged, determine:
6.1
the final speed of motor and rotor
the time to reach this speed,
the kinetic energy lost during the period of slipping.
the torque on the armature shaft and rotor if it is assumed that a constant
resisting torque of 60 N-m is present
6.2
6.3
6.4

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