Explanation Introduction: The primary motor control device is the one that connects the load to the line. It works as an interface between the load and the line and controls the operation of the motor. The examples of primary motor control devices are stator, controller and motor contactor. The stator is the stationary portion of the electric motor. The stator provides the rotating magnetic field to rotate the armature winding. The motor controller in the motor is generally used to govern the predetermined performance of the motor...

2nd Edition

ISBN: 9780073373812

Author: Frank D. Petruzella

Publisher: McGraw-Hill Education

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Reversing and Sequence Control

In most digital applications involving electronic circuits and advanced control systems, the control of electronic components such as motors, on/off switches, mechanical valves, and so on is not controlled by analog means, but is controlled digitally. Th…

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Chapter 4.1, Problem 1RQ

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The three examples of primary motor control devices.

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Chapter 3.3, Problem 5DT

Chapter 4.1, Problem 2RQ

Chapter 4 Solutions

Electric Motors and Control Systems

Ch. 4.1 - Prob. 1RQ Ch. 4.1 - Prob. 2RQ Ch. 4.1 - What do the terms normally open and normally...Ch. 4.1 - The types of enclosures used to house motor...Ch. 4.1 - Prob. 5RQ Ch. 4.1 - Compare the operation of momentary and maintained...Ch. 4.1 - What is the OSHA requirement for resetting...Ch. 4.1 - Prob. 8RQ Ch. 4.1 - Explain how a push-to-test pilot light operates.Ch. 4.1 - Compare the way in which pushbutton and selector...

Ch. 4.1 - Prob. 11RQ Ch. 4.2 - Define the term mechanically operated switch.Ch. 4.2 - In what way are limit switches normally actuated?Ch. 4.2 - A control application calls for an NC held open...Ch. 4.2 - List four common types of limit switch operator...Ch. 4.2 - Prob. 5RQ Ch. 4.2 - Prob. 6RQ Ch. 4.2 - For what types of machine control applications are...Ch. 4.2 - How does a fluid capillary tube temperature switch...Ch. 4.2 - Prob. 9RQ Ch. 4.2 - Prob. 10RQ Ch. 4.3 - In general, how do sensor pilot devices operate?Ch. 4.3 - What is the main feature of a proximity sensor?Ch. 4.3 - List the main component of an inductive proximity...Ch. 4.3 - Explain the term hysteresis as it applies to a...Ch. 4.3 - How is a two-wire sensor connected relative to the...Ch. 4.3 - In what way is the sensing field of a capacitive...Ch. 4.3 - For what type of target would a capacitive...Ch. 4.3 - Prob. 8RQ Ch. 4.3 - Name the three most common scan techniques for...Ch. 4.3 - What are the advantages of fiber optic sensing...Ch. 4.3 - Outline the principle of operation of a Hall...Ch. 4.3 - Outline the principle of operation of an...Ch. 4.3 - List the four basic types of temperature sensors...Ch. 4.3 - Compare the way in which a tachometer and magnetic...Ch. 4.3 - Outline the principle of operation of an optical...Ch. 4.3 - What approach is usually taken to measurement of...Ch. 4.3 - Prob. 17RQ Ch. 4.4 - Define the term actuator as it applies to an...Ch. 4.4 - In what ways are electromagnetic relays employed...Ch. 4.4 - Prob. 3RQ Ch. 4.4 - Prob. 4RQ Ch. 4.4 - Prob. 5RQ Ch. 4.4 - Prob. 6RQ Ch. 4.4 - Prob. 7RQ Ch. 4.4 - Prob. 8RQ Ch. 4.4 - Prob. 9RQ Ch. 4.4 - What is the basic difference between an open-loop...Ch. 4.4 - Prob. 11RQ Ch. 4.4 - Prob. 12RQ Ch. 4.4 - In what way docs a double-break contact differ...Ch. 4.4 - Prob. 14RQ Ch. 4.4 - Prob. 1T Ch. 4.4 - Prob. 2T Ch. 4.4 - Prob. 4T Ch. 4.4 - Prob. 5T Ch. 4.4 - A through-beam photoelectric sensor appears to be...Ch. 4.4 - Prob. 1DT Ch. 4.4 - Prob. 2DT Ch. 4.4 - Prob. 3DT Ch. 4.4 - What does the range adjustment on a float switch...Ch. 4.4 - A stepper motor cannot be bench-checked directly...

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