At max load, the elevator E weighs 8000 lb. The counterweight C weighs 3500 lb. Research shows that generally speaking, elevator speeds reach up to 600 ft/min, and are designed to accelerate at about 10 ft/s². If the elevator is at capacity, the motor has an efficiency of 85%, and the mechanical systems (pulleys, cables, etc.) experience various energy losses totaling 30%, find the required power input to the motor if... (a) The elevator is accelerating and moving up at maximum rates. (b) The elevator is moving up at a constant max rate. (c) The elevator is moving down at a constant max rate.

At max load, the elevator E weighs 8000 lb. The counterweight C weighs 3500 lb. Research shows that generally speaking, elevator speeds reach up to 600 ft/min, and are designed to accelerate at about 10 ft/s². If the elevator is at capacity, the motor has an efficiency of 85%, and the mechanical systems (pulleys, cables, etc.) experience various energy losses totaling 30%, find the required power input to the motor if... (a) The elevator is accelerating and moving up at maximum rates. (b) The elevator is moving up at a constant max rate. (c) The elevator is moving down at a constant max rate.

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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Question

At max load, the elevator E weighs 8000 lb. The counterweight C weighs 3500 lb. Research
shows that generally speaking, elevator speeds reach up to 600 ft/min, and are designed to
accelerate at about 10 ft/s². If the elevator is at capacity, the motor has an efficiency of 85%,
and the mechanical systems (pulleys, cables, etc.) experience various energy losses totaling
30%, find the required power input to the motor if...
(a) The elevator is accelerating and moving up at maximum rates.
(b) The elevator is moving up at a constant max rate.
(c) The elevator is moving down at a constant max rate.
E
C
M

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Step 1: Write the given data with suitable variables.

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Step 2: Determine the value of different load and capacity in the cable.

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Step 3: (b)-Find the power generate by the cable of the motar.

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