Other drives and accessories
Introduction
An actuator is a device capable of transforming hydraulic, pneumatic or electrical energy into the activation of a process in order to generate an effect on an automated process. It receives the order from a regulator or controller and based on it generates the order to activate a final control element, such as a valve. They are the elements that directly influence the output signal of the automation, modifying its magnitude according to the instructions they receive from the control unit.
Guys
There are several types of actuators, such as:
Hydraulic, pneumatic and electrical actuators are used to drive mechatronic devices. Hydraulic actuators are generally used when power is needed and pneumatic actuators are simply positioning. However, hydraulics require a lot of equipment for power supply, as well as periodic maintenance. On the other hand, the applications of pneumatic models are also limited from the point of view of precision and maintenance.
Electric actuators
Electric actuators are also widely used in mechatronic devices, such as robots. Brushless AC servomotors "Brush (electricity)") will be used in the future as precise positioning actuators due to the demand for operation without so many hours of maintenance.
Hydraulic actuators
Contenido
Los actuadores hidráulicos, que son los de mayor antigüedad, pueden ser clasificados de acuerdo con la forma de operación, funcionan sobre la base de fluidos a presión. Existen tres grandes grupos:.
Hydraulic cylinder
According to their function, we can classify hydraulic cylinders into two types: single-acting and double-acting. In the first type, hydraulic force is used to push and a different, external force to contract. In the second type, hydraulic force is used to carry out both actions. Steering control is carried out by a solenoid. Inside they have a spring that changes its elastic constant with the passage of current. That is, if current flows through the electric piston, it can be easily extended.