11 Facts About Linear actuator

Linear actuator is an actuator that creates motion in a straight line, in contrast to the circular motion of a conventional electric motor.

For example, a linear actuator using an integral horsepower AC induction motor driving a lead screw can be used to operate a large valve in a refinery.

Linear actuator using standard motors will commonly have the motor as a separate cylinder attached to the side of the actuator, either parallel with the actuator or perpendicular to the actuator.

Mechanism to stop the stroke of an Linear actuator is a limit or micro switch, which can be seen in the image below.

Traveling-nut linear actuator has a motor that stays attached to one end of the lead screw, the motor spins the lead screw, and the lead nut is restrained from spinning so it travels up and down the lead screw.

Traveling-screw linear actuator has a lead screw that passes entirely through the motor.

Static load capacity can be added to a linear screw actuator using an electromagnetic brake system, which applies friction to the spinning drive nut.

In most cases when using an electro-mechanical Linear actuator, it is preferred to have some type of speed control.

Linear actuator motor is functionally the same as a rotary electric motor with the rotor and stator circular magnetic field components laid out in a straight line.

Linear actuator motors have an advantage in outdoor or dirty environments in that the two halves do not need to contact each other, and so the electromagnetic drive coils can be waterproofed and sealed against moisture and corrosion, allowing for a very long service life.

Linear actuator motors are being used extensively in high performance positioning systems for applications which require various combinations of high velocity, high precision and high force.