Chapter 07 - Final Element

Chapter 07 - Final Element - CHAPTER VII CHAPTER VII FINAL...

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Unformatted text preview: CHAPTER VII CHAPTER VII FINAL CONTROL FINAL CONTROL ELEMENT ELEMENT FINAL CONTROL ELEMENT (FCE) FINAL CONTROL ELEMENT (FCE) ¡ Carries out control actions through control mechanism produced by actuators. ¡ The FCE commonly used in industries are valves. Dr. Abdirahman CHAPTER 7 Page 2 of 41 I. I. ACTUATOR ACTUATOR ¡ A peripheral which converts control ignals from the controller to the signals from the controller to the moving part (mechanically) of the final control element. ¡ Two types of actuators used in control systems are solenoid and motor. Dr. Abdirahman CHAPTER 7 Page 3 of 41 1. Solenoid 1. Solenoid here are two working principles of a solenoid ¡ There are two working principles of a solenoid system either are as a pusher and a puller. ¡ The elements in a solenoid consists of a coil, core and a spring. When the coil is energized from the control signal, the magnetic field around the coil will pull the core towards the coil and vice versa when the coil is de-energized. ¡ The peripheral that needs to be moved like the valve will be connected to the edge of the core and will move with it. Therefore, the valve will be opened or losed according to the movement of the solenoid closed according to the movement of the solenoid. ¡ This solenoid is known as a linear actuator and is used to push and pull a horizontal object....
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This note was uploaded on 05/09/2010 for the course CHE 3022 taught by Professor Abdirahman during the Fall '07 term at National Central University.

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Chapter 07 - Final Element - CHAPTER VII CHAPTER VII FINAL...

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