Proportional solenoids – find manufacturers and suppliers

Proportional solenoids, also known as proportionally actuated solenoids, are special solenoids that enable precise, variable control of their force or position. Unlike conventional solenoids, which only have an on/off function, proportional solenoids can generate a force or position proportional to a control signal applied to them. Here are the main features and functions of proportional solenoids:

Structure and function

Electromagnetic coil: The basic component of a proportional solenoid is an electromagnetic coil that generates a magnetic field when electric current flows through it.

Iron core and armature: Inside the coil is a movable iron core (armature) that is attracted by the generated magnetic field. The movement of the armature is the actual mechanical working element of the solenoid.
Control signal: Instead of only accepting a simple on/off signal, a proportional solenoid reacts to an analog control signal (e.g. a variable voltage or a variable current). The strength of the control signal determines the magnetic force and therefore the position or force of the armature.

Feedback: Many proportional solenoids use some form of feedback to monitor and control the position or force of the armature. This can be done using position sensors or force sensors that provide feedback to the control electronics.

Applications

Proportional solenoids are used in various applications where precise control and regulation are required:

Hydraulics and pneumatics: In valves to control the flow of liquids or gases.

Automotive industry: In vehicle systems such as brakes, gearboxes and fuel systems.

Industrial automation: In production lines, robot control systems and machine tools.

Medical technology: In devices that require precise movements and forces.

Advantages

Precision: Enables accurate control of position and force.

Flexibility: Can be used in a wide range of applications.

Efficiency: Can use energy efficiently as only the necessary force or movement is generated.

Disadvantages

Cost: More complex and expensive than simple on/off solenoids.

Complexity: Requires more sophisticated control electronics and possibly feedback systems.

In summary, proportional solenoids are essential components in systems that require precise and variable control. Their ability to produce a force or motion that varies proportionally to the control makes them versatile and valuable in many engineering and industrial applications.