Solenoids

 
   Solenoids are the most common actuator components. The basic principle of operation involves a moving ferrous core (a piston) that will move inside a wire coil as shown below. Normally the piston is held outside of the coil by a spring. When a voltage is applied to the coil and current flows, the coil builds up a magnetic field that attracts the piston and pulls it into the centre of the coil. The piston can be used to supply a linear force. There are many and varied applications of solenoid actuators. All requiring a similar type of movement and force    
     
     
     
     
     
 
                   
    solenoid actuators    
       
       
       
       
       
       
       
                   
         
         
         
         
         
         
         
         
         
         
         
                   
 

.      .

 
 

Copyright pc-control.co.uk 2008