EBK MINDTAP FOR HERMAN'S UNDERSTANDING
4th Edition
ISBN: 9781337798761
Author: Herman
Publisher: VST
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Textbook Question
Chapter 30, Problem 1RQ
Name three methods of braking a motor.
Expert Solution & Answer
To determine
Identify three methods of braking a motor.
Explanation of Solution
The motors are generally slowed to stop by disconnecting thee power supplied. But, there are instances where that is not convenient. In these instances, brakes are applied to the motor to slow or stop the motor.
Some of the methods of braking a motor are:
- Mechanical brakes.
- Dynamic brakes.
- Plugging.
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Hints: Find the closed loop transfer function and then plot the step response for diFerentvalues of K in MATLAB. Show step response plot for different values of K.
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what is shear stress and normal? how to tell them while calculating?
12 mm
45 mm
20 kN
20 kN
12 mm
45 mm
PROBLEM 1.61
For the assembly and loading of Problem 1.60, determine (a) the
average shearing stress in the pin at C, (b) the average bearing stress at
C in member BC, (c) the average bearing stress at B in member BC.
PROBLEM 1.60 Two horizontal 20-kN forces are applied to pin B of
the assembly shown. Knowing that a pin of 20-mm diameter is used at
each connection, determine the maximum value of the average normal
stress (a) in link AB, (b) in link BC.
Chapter 30 Solutions
EBK MINDTAP FOR HERMAN'S UNDERSTANDING
Ch. 30 - Name three methods of braking a motor.Ch. 30 - How is the braking force of drum type brakes...Ch. 30 - Why are mechanical brakes often used on cranes?
Ch. 30 - What is the advantage of dynamic brakes over...Ch. 30 - What is the disadvantage of dynamic brakes when...Ch. 30 - The amount of counter torque developed by a direct...Ch. 30 - When using dynamic braking for a direct current...Ch. 30 - Name three factors that determine the amount of...Ch. 30 - How is dynamic braking for direct current motors...Ch. 30 - How is the dynamic braking force of an alternating...
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