What is linear actuator?
Electric linear actuators, or electromechanical linear actuators, are basic linear actuators that move as a result of an outside power source. These actuators use electrical power to achieve mechanical force. Electric linear actuators are used in a wide range of applications including robotics, aerospace, and factory automation. Some electric linear actuators and units can operate in vacuum, radiation, cryogenic, corrosive, and underwater environments.

An electric actuator uses electric power rather than air or liquid ones. This affords you many benefits over and above the others. Electric actuators can run much quieter than other solutions. All you’ll hear if you listen closely is the hum of the actuators while they’re running.
Not only are they quiet. They use less peripheral components. These components for other actuators can get expensive, and some of them, like hydraulics, can even make a mess of your project if they break down. Additionally, the more components you have for your automation system, the more chance of it breaking down. Fewer components means you won’t be dealing with a break down and you’ll be doing much less maintenance over time. Electric actuators require almost no maintenance!

Why Electric Actuators?
In terms of home, office and industry automation, electric actuators are still the new kids on the block. They’ve been around for less than a hundred years, and their use is not as widespread as they could be. One of the reasons for this is that electric linear actuator technology is still developing. Twenty years ago, linear motion actuators were mostly hydraulic and pneumatic, just because electric automation solutions couldn’t perform as well as the others. That has changed drastically over the last two decades, and is still changing today. As the technology improves, we will see it being used more and more across many different industries.

How it work?

Electric linear actuators are devices that produce mechanical motion by converting various forms of energy into mechanical energy. In electric linear actuators, a motor rotates a drive screw using a synchronous timing belt drive, worm gear drive, or direct drive. The turning of the screw pushes a drive nut along the screw, which in turn pushes the rod out. Rotating the screw in the opposite direction retracts the rod. The drive screw of electric linear actuators is either an ACME or ball thread or is belt-driven, while the drive nut is plastic, bronze, or a ball nut.

These actuators are made up of different components that work together to create the motion. Most actuators have a few basic parts: rod, lead screw and nut, a motor, gears and a power supply.Following are details of each components:
1.The Rod
The rod of an actuator is the main moving part. When the power supply provides the motor with electricity, the gears turn, which turns the lead screw and moves the rod. The rod is set to move for a predetermined length by sensors that let it know it has reached the end of its stroke length.
2.The Lead Screw and Nut
There are different options available for creating motion, but using a lead screw and nut is the most economical option. A lead screw is threaded, like any screw, and the turning motion drives it up the nut. The rod of the actuator is attached to the screw, so extends the rod.
3.The Gears
The gears of an actuator are what make the screw turn. Once the power is supplied, this turns the gears and starts the rest of the process in motion.
4.The Motor
There are different kinds of motors that can be used for electric actuators, but again, the most economical option without sacrificing reliability or function is the brush motor. Without the power supply, any linear motion actuator would be pretty useless.
5.The Power Supply
Options for power supply in linear actuators vary depending on the needs of the individual. Either AC or DC power can be used, meaning the system can be made portable or used with a regular household outlet. Along with supplying electricity to the unit, the power supply can also be made to control the speed of an actuator, or various other components like timers.
All the components work in tandem to create linear motion. Even though many individuals may not have heard of linear actuators, they are being used in nearly every industry across the face of the planet. If you are using products made in a factory, you can bet that linear actuators have been used in one way or another.

What is The Difference between Static Load and Dynamic Load ?
Dynamic, working, or lifting load is the force that will be applied to the actuator while it is in motion. Static load, also called the holding load, is the force that will be applied to the actuator when it is not in motion.

Can Actuators Have Limit Switches ?
Linear actuators can be supplied with limit switches. Our actuators have the standard option of electro-mechanical proximity limit switches. Other limit switch types such as inductive, magnetic proximity, rotary cam etc.. can be supplied on request, for details consult PJM TEC Co.,ltd. 
Limit switches are not preset on actuators. Limit switches allow you the flexibility to set the limits of travel on your actuator to fit your particular application. Easy to follow instructions are included in the installation manual, consult Power Jacks if further assistance is required. The customer is responsible for properly setting the limit switch in the unit. If the limit switches are not set, or are improperly set, the unit may be damaged during operation. In addition, limit switches may require resetting if the translating tube of your actuator is rotated manually, as this will change the limit switch setting.

What Type of Motors do the Actuators Use ?
All of the actuators are available with AC or DC motor variants, however each range has preferred standard types. Our standard types are DC 12V,24,36,48,90V.
What is the Duty Cycle Capability of a Linear Actuator ?
Duty cycle rating for a linear actuator is generally expressed as a percentage of "on time" (the ratio of on time to total time) or as distance travelled over a period of time. may also be expressed as a percentage.
Duty cycle and continuous duty ratings of the actuator should not be exceeded. To do so could cause damage to the unit thus voiding any warranty on the motor. See instruction and maintenance sheet for these ratings or consult PJM Tec Co.,ltd

Contact Us

industrial linear actuator,electric actuator,motion control actuator,solar tracking actuator,automotive linear actuator,BLDC motor,motor actuator supplier:

  • Address:Liaobu Industry,Donghuan city,Guangdong Province,China.             
  • Email:sales@pjmtec.com
  • Website:www.pjmtec.com