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Solenoids developed and made by magnetbau Schramme

We develop and produce your individual electromagnet in our special factory in small and large series.

Schramme has been developing and producing electromagnets since 1975. Proportional solenoids are our strength. The special challenge here is the reduction of hysteresis.


Linear Solenoids

Electromagnets in the form of linear solenoids are also correctly called DC single solenoids. The linear solenoid is a ...

Special Magnets

Customized development

Magnetbau Schramme is your specialist for embedded-design solenoids. No matter what your ...

Proportional Solenoids

Proportional valves, control valves or also continuous valves are actuated electromagnetically. Electromagnetically actuated ...

Control-Solenoid, Control-Magnet and Control Valve

These electromagnets/solenoids are commonly used in control valves. The spectrum of control magnets as well as the variety ...

Electromagnetic Clutches

Electromagnetic clutches are magnet systems with an open magnetic circuit. When activated, they are suitable for ...

Electrical Holding Magnets, Holding Solenoids

The soleneoid as an holding solenoid is a magnet system with an open magnetic circuit and is suitable for holding ...

Reversing Linear Solenoids

Electromagnets or solenoids designed as reversing linear solenoids consist of two magnet systems. The stroke motion of the ...

Bistable Reversing Linear Solenoids

Electromagnets or solenoids can perform a high degree of linear work within a minimum of space. To operate an electromagnet ...

Double Proportional Solenoids

Double proportional solenoids consist of two magnet systems. These specialized linear solenoids are used to effect stroke ...

Miniature Solenoids

Electromagnets designed as miniature solenoids are specialized linear solenoids, characterized by compact design and high ...

Double-acting and Single-acting Spreader Solenoids

Spreader solenoids are used almost only as actuation (releasing) magnets for brakes. Single-acting spreader solenoids are ...

Pinch Valve

The hose clamp valves (pinch valves, hose pinch valves) from Schramme stand for uncompromising quality and components with ...

Permanent holding magnets

A permanent magnet is a magnet that can generate a constant magnetic field without depending on an external energy source.



What is an solenoid?

Solenoid (electromagnet) is an umbrella term for all types of electromagnetic actuators. It consists of a coil of electrically conductive wire through which a current flows.

As soon as the current flows through the coil, a magnetic field is generated around the coil. The strength of the magnetic field depends on the strength of the current flowing through the coil and the number of turns in the coil.

Depending on the design, the magnetic force of the solenoid is used to perform linear & rotational movements or to apply holding forces to components, thereby fixing or braking them.

An Solenoid comes in different types:

Solenoids, Holding Solenoids, Bistable Solenoids, Reversing Solenoids, DC Solenoids, Electromagnet Valves, Twin Solenoids, Switching Solenoids, Electromagnetic Clutches, Miniature Solenoids, Proportional Solenoids, Spreading Solenoids, Braking Solenoids, Permanent Holding Solenoids, Locking Solenoids and other special solenoids for various applications.

Most of our products are custom designed and then mass produced.

Advantages of solenoids?

A major advantage of solenoids is their strength. Significantly greater magnetic forces can be applied with an solenoid than with classic permanent magnets. This makes them ideal for applications that require a high magnetic force.

Furthermore, solenoids impress with their versatility. They are used in a wide variety of applications. From excavators to church organs, from escalators to drilling machines, from trucks to summer toboggan runs - magnetic technology can be found almost everywhere.

Controllability is also an advantage, as solenoids can be controlled precisely and quickly, making them ideal for applications where fast and accurate control of magnetic force is required.

Another strength of solenoids is their efficiency. They only consume power when they are switched on. Permanent magnets, on the other hand, always have a magnetic force and are difficult to control and turn off.

Summary: What are the greatest advantages of electromagnetic systems or magnetic technology?

  • Robust design and low sensitivity to interference
  • Fast movement with high dynamics
  • High forces
  • Low technical effort compared to an electromotive solution
  • Simple electrical control
  • Wide operating temperature range
  • Low number of moving parts
  • Long life and no maintenance required
  • High protection classes and explosion-proof products
  • Can be used in a wide range of applications

All of our innovations, research, development, design, manufacturing, whether small series or large series, can be found in a wide variety of industrial sectors.

Examples of applications of electromagnets are:

  • Automotive (commercial vehicles, hydrogen)
  • Mobile hydraulics (cranes, excavators, forklifts)
  • Conveyor technology (elevator, escalator)
  • Safety engineering (door closing systems, locking technology)
  • Medical technology (lung ventilation, anesthesia, dialysis)
  • Music (piano, organ)
  • Food industry
  • Small electrical appliances
  • Maritime applications

We offer electromagnets or complex magnet systems from Schramme for your future success.

Please feel free to contact one of our representatives or reach us via the contact form.

Frequently asked questions about solenoids

  • What components does an solenoid consist of?

    1) Housing

    The housing of an solenoid is usually a frame or shell made of a magnetically and electrically conductive material, such as iron or steel.

    It encloses the magnetic core and coil of the electromagnet and serves to concentrate and strengthen the magnetic field inside by maintaining the flow of magnetic field lines and preventing the magnetic field from propagating in undesirable directions. The housing also protects the coil from external influences such as vibration, moisture or damage.

    2) Coil

    The coil usually consists of a wire wound around a magnetisable core. The wire used for the coil is usually made of a conductive material such as copper. The number of turns in the coil, the thickness of the wire and the shape of the coil all affect the properties of the magnetic field produced.

    3) Armature

    The armature is the moving part that strives for the ideal state of the iron circuit when the solenoid is energised, i.e. it closes the air gap.

    4) Iron core

    The iron core is the stationary part in the solenoid towards which the armature moves when the coil is energised.

  • How does an solenoid work?
    How does an Electromagnet work

    We have often been asked by business partners how a solenoid works. For this reason, we have decided to make a short contribution.

    How it works

    • Electrical energy is converted into magnetic energy and then again into mechanical energy.
      Current flows through the copper coil (2), creating a magnetic field. This exerts a force through the armature (3), which moves in the direction of an iron core (1).
      Since the elements, iron core (1), armature (3) and housing (5) are made of ferromagnetic material, they try to establish an ideal state when a magnetic flux passes through them. This causes the armature (3) to try to close the air gap (4) and move towards the iron core (1).
      Solenoids are mainly used as drive elements to generate linear and rotational movements such as moving, holding, switching, controlling.
      Unlike permanent magnets, where the magnetic force is constant, the magnetic field of solenoids can be regulated depending on the current flow. Thus, the mechanical force can be controlled or switched off depending on the current flow.


    • Locking systems, magnetic clutches, diaphragm pumps.
      Dosing systems in medical technology and beverage dispensers (hose clamp valves)
      Automation and assembly technology
      In the hydrogen sector
      Electrical hand-held devices
      Conveyor technology (lifts, escalators)
      Mobile hydraulics (cranes, rollers, excavators)


    If you need a customised solenoid for your project, please contact us. Our development team will advise you on the implementation of a technical solution for your project.

    Your Schramme team

  • On which variables does the force of an solenoid depend?

    The force of an solenoid depends on several variables, including:

    1) Number of turns of the coil:

    The more turns the coil has, the stronger the magnetic field is generated, resulting in a greater force.

    2) Current intensity:

    The higher the current that flows through the coil, the stronger the magnetic field and therefore the force.

    3) Size of the magnetisable core:

    A larger core usually means a stronger magnetic field and therefore a greater force.

    4) Current + number of turns

    The product of the current strength and the number of turns influences the field strength and thus, via the iron circuit, the magnetisation and then the magnetic force.


IATF 16949 certification DIN EN ISO 9001 certification

As a developer and producer of electromagnets is Magnetbau Schramme GmbH & Co. KG certificated.

You can here download and view the certifications or copy, save and print the documents for your records. 

More informations you get in our Mediathek section on this website.