Electric Motor Control
10th Edition
ISBN: 9781133702818
Author: Herman
Publisher: CENGAGE L
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Chapter 1, Problem 11SQ
To determine
Choose the correct option which does not represent a fundamental job of a motor controller.
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Identify and describe the basic functional elements that could be used in closed loop control for the following systems listed below. Include block diagrams for both, and give examples of sensors, controllers and actuators that would be used for both.
1) speed controlled electric motor
2) rollers in a steel strip meel being used to maintain a constant thickness of steel strip
Identify and describe the basic functional elements that could be used in closed loop control for the following systems:
1) speed controlled electric motor
2) rollers in a steel strip meel being used to maintain a constant thickness of steel strip
include block diagrams for each and suggest examples of sensors, controllers and actuators that might be selected in each environment
Industrial Motor Controls
8.a. A typical motor speed control circuit that is controlled by an analog current loop will have a current ofA. 4-20 mA.B. 2-20 mA.C. 5-50 mA.D. 0-10 mA.8.b. Which one of the following statements is true of a disabled contact or coil?A. The disabled element has been automatically disabled due to module failure.B. The disabled element is held false by the PLC.C. A disabled contact or coil is caused by a faulty memory location in the PLC.D. A contact must be in the disabled state before it can be forced ON or OFF.
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