A punching press is driven by a constant torque electric motor. The press is provided with a flywheel that rotates at a maximum speed of 225 rpm. Radius of gyration of the flywheel is 0.5 m. The press punches 720 holes per hour, each punching operation takes 2 seconds and requires 15 kNm of energy. Find the motor power required and cross section of the flywheel if the speed of the same must not fall below 200 rpm. The flywheel has a rectangular cross section with width equal to three times the thickness. Density of flywheel material is 5400 kg/m³

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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A punching press is driven by
provided with a flywheel that rotates at a maximum speed of 225 rpm. Radius
of gyration of the flywheel is 0.5 m. The press punches 720 holes per hour,
each punching operation takes 2 seconds and requires 15 kNm of energy. Find
the motor power required and cross section of the flywheel if the speed of the
same must not fall below 200 rpm. The flywheel has a rectangular cross
section with width equal to three times the thickness. Density of flywheel
material is 5400 kg/m³
constant torque electric motor. The press is
Transcribed Image Text:A punching press is driven by provided with a flywheel that rotates at a maximum speed of 225 rpm. Radius of gyration of the flywheel is 0.5 m. The press punches 720 holes per hour, each punching operation takes 2 seconds and requires 15 kNm of energy. Find the motor power required and cross section of the flywheel if the speed of the same must not fall below 200 rpm. The flywheel has a rectangular cross section with width equal to three times the thickness. Density of flywheel material is 5400 kg/m³ constant torque electric motor. The press is
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