Concept explainers
List the advantages of the use of two-wire control devices.
Explanation of Solution
A two-wire control circuit can be a pressure switch, toggle switch, simple switch, limit switch, float switch, or a thermostat which breaks or makes a connection to a motor through definite on and off positions.
The advantage of two-wire control devices is that the motor is operated (or controlled) by an automatic control device without requiring the presence of a human operator. For example, if the motor is stopped by power failure while the contacts are closed, the two wire control device will not open, that remains in a closed condition. Therefore, the motor can restart when the power is restored.
Conclusion:
Thus, the advantage of the use of two-wire control devices is explained.
Want to see more full solutions like this?
Chapter 17 Solutions
Electric Motor Control
- What is the advantage of using solid-state devices in electronic control systems?arrow_forwardExplain the Modeling of electro-mechanical control system?arrow_forwardName each curve in terms of control mode in the following graph. And discuss the advantages and disadvantages of each mode. Add the on/off control curve to graph. y Set point Timearrow_forward
- 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 environmentarrow_forwardthe controller function Gc(s) = 2s id a proportional controller true or flase?arrow_forward1. Discussed briefly the Root locus and Nicholas chart in calculating stability. 2. Discussed briefly the effects of the different types of compensators in control systems.arrow_forward
- Part 1: Process Diagram for Open-Loop Control Systems An open-loop control system can process an input condition to produce an output. Fill in the controller and the plant for each process shown below. Input Control Output Controller Plant Light On, Control Light On Toasted Bread Toasted Bread Control What can be added in the process diagrams to verify the desired output has been achieved?arrow_forward2. Discussed briefly the effects of the different types of compensators in control systems.arrow_forwardWhat is Adaptive control system? If the process characteristics are notwell known then what type of scheme you would suggest explain in detail thescheme and write its merits and demerits.arrow_forward
- Electricity for Refrigeration, Heating, and Air C...Mechanical EngineeringISBN:9781337399128Author:Russell E. SmithPublisher:Cengage Learning