Linear solenoids and actuating solenoids

Linear solenoids are specialised electromagnets that can be Utilising the magnetic field, to perform mechanical movements. They are available in a variety of designs tailored to the specific needs of different industries. Due to their ability to interact with external forces, they offer a Flexible and efficient solution for mechanical drive tasks.

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How does a linear solenoid work?

The linear solenoid is a Shape of the electromagnets, The armature of the solenoid is moved from the stroke start position to the stroke end position by energising a coil with an electromagnetic force. The return can take place by means of an integrated return spring or via external force influences. A special form is the bistable linear solenoid represent:
  • Its anchor is without further energy supply held in an end position by external forces using a permanent magnet.
  • By a current pulse in reverse polarity, or by Energising a second coil, the armature is moved to the other end position, where it is also held in position by a permanent magnet.
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Christian Berger

Sales field service at
magnet.works

Linear solenoids - at a glance

Functionality Solenoids generate a magnetic field by energising a coil, which pulls or pushes the armature. In some versions, a permanent magnet holds the armature in position without current.
Properties Designs range from simple, robust single solenoids with or without return springs to bistable solenoids.
Advantages Fast switching times, long service life and maintenance-free use. They require little energy and are flexible to install.
Areas of application Used in locking systems, mechanical actuators, as valve solenoids and in safety technology, especially in the transport and manufacturing sectors.

Linear solenoids - Overview

A basic distinction is made between following functional principles:
  • Energised pulling.
  • Pressing current.
  • Bistable single-acting.
  • Bistable as a double-stroke solenoid.
  • With return spring, or without return spring.

Types and properties of linear solenoids

We at magnet.works see ourselves as Special magnet maker. As we develop and produce our own products, we can fulfil all possible customer requirements.

The following standard designs are typically available:

Single lifting magnets as sheet metal stirrup magnets without potting Simple and cost-effective, suitable for basic applications.
Single lifting magnets moulded as sheet metal stirrup magnets These magnets achieve a protection class of at least IP40, which makes them resistant to dust and splash water.
Single solenoids in solid material housing Developed for higher forces, with precisely guided anchors to extend service life. Customisable with different connector types and customer-specific fastening solutions.
Bistable linear solenoid, single-acting Available in open frame or solid housing, maintains end position without power, ideal for interlocking systems. Offers a compact design and low energy consumption, ideal for battery operation.
Bistable solenoid as double solenoid Enables control in both lifting directions and is designed for high forces and long lifting distances.

Linear solenoids: The advantages at a glance

  • Fast switching times.
  • Short response time.
  • Long service life.
  • Robust mechanics.
  • Maintenance-free.
  • Can be installed in any position.
  • Low power consumption.
  • A wide range of voltages possible.
  • Various plugs or cables possible.
  • Limit switch possible.
  • A wide variety of electronic components such as diodes, rectifiers, etc. are possible.

When are solenoids used?

Linear solenoids can be found in a wide variety of industries and applications.
Typical applications are

  • Locking systems such as door locks in trains, in machine housings, in animal stables, etc. But also flap locks on vehicles or step locks on railway carriages.
  • Actuation of mechanical systems such as the switching of flaps or points as well as the triggering of pressure vessels or coupling/releasing in drive systems.
  • As a valve solenoid, e.g. for dosing liquids.
  • As stamps or for punching in automated production processes.
  • For picking up or placing lightweight components on conveyor systems.
  • For devices in safety technology.