An electric motor is mounted on four identical springs of negligible damping so that the surface transmitted is one-ninth of the impressed force. The wt. of the motor is 115 kg and it runs at 1200 rpm. The armature weights 25 kg and its center of gravity lies 0.05 cm from the axis. Determine the stiffness of each spring, natural frequency and the dynamic force transmitted to the base.

An electric motor is mounted on four identical springs of negligible damping so that the surface transmitted is one-ninth of the impressed force. The wt. of the motor is 115 kg and it runs at 1200 rpm. The armature weights 25 kg and its center of gravity lies 0.05 cm from the axis. Determine the stiffness of each spring, natural frequency and the dynamic force transmitted to the base.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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An electric motor is mounted on four identical springs of negligible damping so
that the surface transmitted is one-ninth of the impressed force. The wt. of the motor is 115
kg and it runs at 1200 rpm. The armature weights 25 kg and its center of gravity lies 0.05 cm
from the axis. Determine the stiffness of each spring, natural frequency and the dynamic force
transmitted to the base.

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