[General description] The actuator, also known as actuator, is a kind of commonly used electromechanical equipment in the field of automatic control. Its broadest definition is: a driving device that can provide linear or rotary motion. It uses a certain driving energy and works under the action of a certain control signal. The actuator uses liquid, gas, electricity or other energy sources and converts them into driving action through motors, cylinders or other devices.
Principle of Electric Actuator -- Introduction
Actuator, also known as actuator, is a kind of commonly used mechatronics equipment in the field of automatic control. Its broadest definition is: a driving device that can provide linear or rotary motion. It uses a certain driving energy and works under the action of a certain control signal. The actuator uses liquid, gas, electricity or other energy sources and converts them into driving action through motors, cylinders or other devices.
Electric actuator
Principle of electric actuators -- Classification
According to the power type, electric actuators can be divided into pneumatic, hydraulic, electric, electro-hydraulic, etc; According to the form of motion, it can be divided into straight stroke, angular stroke, rotary type, etc; According to different standards, the electric type can be divided into: combined structure, electromechanical integration structure, electrical control type, electronic control type, intelligent control type, digital type, analog type, infrared remote control debugging type, etc. Due to the incomparable advantages of using electricity as power over other media, the electric type has developed fastest in recent years and has a wide range of applications.
Electric actuator
Principle of electric actuator
Let's take MD series electric actuator as an example to introduce its principle. MD series electric actuators are servomechanisms driven by AC servo motors. The position positioner PM-2 control board receives 4~20mA DC control signals from the regulating system and the position feedback borrow signals from the position transmitter for comparison. The signal deviation after comparison is then conducted through the amplifier power stage, and then the mutual motor rotates to drive the output of the actuator to move in the direction of reducing this deviation, Until the deviation signal is less than the set value. At this time, the output part of the actuator can be stabilized at the position corresponding to the input signal.
Manufacturer of electric actuator
Principle of Electric Actuator -- Application
The actuator is mainly used to drive the valve to the fully open or fully closed state. The actuator used to control the valve can accurately make the valve in any position. Although most actuators are used to open and close valves, the current design of actuators has gone far beyond simple switching functions, including position sensing device, torque sensing device, electrode protection device, logic control device, digital communication module and PID control module, all of which are installed in a compact housing.