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An electric motor drives a punching press machine running with 500 rpm mean speed. The press machine is capable of punching 5538 holes per hour for one cycle operation. The total mass moment of inertia of rotating parts of the motor and machine is 1.52 kgm². The turning moment diagram required by the press machine is as shown in Figure Q3. Calculate the following. i. ii. iii. The mass moment of inertia of flywheel disc, if the coefficient of fluctuation of speed is 0.05 The cross-sectional thickness of the rim (t) and radius of the rim (), if radius to thickness ratio is 4. The flywheel disc is to be made of Cast Iron with density of 8200 kg/m³. If the speed range of the motor is between 495 rpm and 505 rpm, identify the mass moment of inertia of the flywheel disc which has to be added or removed from the system. 25 T (Nm) 120 60 -15 0.2 0.1 0.2 0.2 0.1 t (sec)

An electric motor drives a punching press machine running with 500 rpm mean speed. The press machine is capable of punching 5538 holes per hour for one cycle operation. The total mass moment of inertia of rotating parts of the motor and machine is 1.52 kgm². The turning moment diagram required by the press machine is as shown in Figure Q3. Calculate the following. i. ii. iii. The mass moment of inertia of flywheel disc, if the coefficient of fluctuation of speed is 0.05 The cross-sectional thickness of the rim (t) and radius of the rim (), if radius to thickness ratio is 4. The flywheel disc is to be made of Cast Iron with density of 8200 kg/m³. If the speed range of the motor is between 495 rpm and 505 rpm, identify the mass moment of inertia of the flywheel disc which has to be added or removed from the system. 25 T (Nm) 120 60 -15 0.2 0.1 0.2 0.2 0.1 t (sec)

Elements Of Electromagnetics
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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An electric motor drives a punching press machine running with 500 rpm mean speed. The press machine is capable of punching 5538 holes per hour for one cycle operation. The total mass moment of inertia of rotating parts of the motor and machine is 1.52 kgm². The turning moment diagram required by the press machine is as shown in Figure Q3. Calculate the following. i. ii. iii. The mass moment of inertia of flywheel disc, if the coefficient of fluctuation of speed is 0.05 The cross-sectional thickness of the rim (t) and radius of the rim (), if radius to thickness ratio is 4. The flywheel disc is to be made of Cast Iron with density of 8200 kg/m³. If the speed range of the motor is between 495 rpm and 505 rpm, identify the mass moment of inertia of the flywheel disc which has to be added or removed from the system. 25 T (Nm) 120 60 -15 0.2 0.1 0.2 Figure Q3 0.2 0.1 t (sec)
Transcribed Image Text:An electric motor drives a punching press machine running with 500 rpm mean speed. The press machine is capable of punching 5538 holes per hour for one cycle operation. The total mass moment of inertia of rotating parts of the motor and machine is 1.52 kgm². The turning moment diagram required by the press machine is as shown in Figure Q3. Calculate the following. i. ii. iii. The mass moment of inertia of flywheel disc, if the coefficient of fluctuation of speed is 0.05 The cross-sectional thickness of the rim (t) and radius of the rim (), if radius to thickness ratio is 4. The flywheel disc is to be made of Cast Iron with density of 8200 kg/m³. If the speed range of the motor is between 495 rpm and 505 rpm, identify the mass moment of inertia of the flywheel disc which has to be added or removed from the system. 25 T (Nm) 120 60 -15 0.2 0.1 0.2 Figure Q3 0.2 0.1 t (sec)
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