Q1 A single stage helical gearbox as shown in Figure Q1 is pulling a crate with an acceleration of 1.5 m/s2. The rope is attached to a 1.2 m diameter drum. Since the gearbox was not properly maintained and running with less lubricant, the gear box efficiency, n has dropped to 70 percent. Table below show details arrangement: Specifications 200 kg Descriptions Weight of crate Number of teeth at motor shaft gear Number of teeth at drum shaft gear |Inertia of motor shaft |Inertia of drum shaft 20 200 1.5 kgm? 125 kgm² Using the coefficient of friction, u= 0.3 between crate and floor; (i) Calculate the required torque by the motor to accelerate the crate at 1.5 m/s². (ii) Calculate the motor power P, when motor rotation is 1800 rpm. (iii) What will happen to the motor if the rope is broken.

Q1 A single stage helical gearbox as shown in Figure Q1 is pulling a crate with an acceleration of 1.5 m/s2. The rope is attached to a 1.2 m diameter drum. Since the gearbox was not properly maintained and running with less lubricant, the gear box efficiency, n has dropped to 70 percent. Table below show details arrangement: Specifications 200 kg Descriptions Weight of crate Number of teeth at motor shaft gear Number of teeth at drum shaft gear |Inertia of motor shaft |Inertia of drum shaft 20 200 1.5 kgm? 125 kgm² Using the coefficient of friction, u= 0.3 between crate and floor; (i) Calculate the required torque by the motor to accelerate the crate at 1.5 m/s². (ii) Calculate the motor power P, when motor rotation is 1800 rpm. (iii) What will happen to the motor if the rope is broken.

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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