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Actuator is a common topic for both mechanical engineering students and electrical engineering students. It is an important topic because actuator is a component which is responsible for moving a mechanical device as well as motors and generator. While pursuing electrical and mechanical engineering, students have to learn about the principle of actuator, its classification, various types of actuators and their operation.
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Actuator and its Principle
An actuator consists of several components which is fitted to the control valve as a source of external power for moving the move-able parts, such as plug, ball or vane. There are different kinds of components which can be used in an actuator and the actuators are classified based on the type of components used.
Different types of components which can be used for input power are electromagnetic actuators, electrostatic actuators, hydraulic actuators, pneumatic actuators, and thermal expansion actuator. An actuator converts energy from a peripheral source to automated form of energy in a controlled way. The actuator input quantities of an actuator depends on the type of components used in the actuator. You can also have such detailed explanations in your content and for that all you need to seek for actuator Assignment Help.
Three Primary Classification of Actuator
1. Pneumatic Actuator
It is the most commonly used method to activate a device by applying the necessary forces with sufficient speed. A pneumatic actuator includes spring sets to offer a fail-safe response on loss drive power. The pneumatic actuators are mainly used in diaphragm, piston, or rotary vanes.
- Electric Actuator
An electric actuator comprises of a gear reducing drive and an electric motor to give a linear or rotational move to a valve. Large isolating valves can be switched On-Off used electric actuators. The electric actuators are mostly used in power stations to generate electricity, water treatment units, pharmaceutical sector etc.
3. Hydraulic Actuator
This type of actuator uses water as a power source and converts it into mechanical energy. Nearly in all hydraulic actuators a piston is used in place of a diaphragm for transforming the pressure of the liquid into mechanical energy. Hydraulic valve is mainly used in gas pipelines.
4. Electro Hydraulic Actuator
There is another type of actuator that uses both electricity and water as a source of power. Such actuators are called Electro Hydraulic actuators. They are most suited for remote sites with unavailability of pneumatic supply pressure however, needs accurate control of valve position.
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