Kendrion Worldwide

Division Automotive

Kendrion N.V.

Kendrion N.V. is a public limited liability company incorporated under the laws of the Netherlands, with its registered office in Zeist.

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Electromagnets can be used for many application such as switching, holding, moving, sorting, actuating.

Trigger, switch, hold, vibrate

Electromagnets - multitalent for your application

Functional range of the electromagnet

Move - actuate - trigger - lock - position - fold - switch

Linear solenoids feature a freely-moving armature which, because of the attraction to the pole face, can traverse a defined path, making it ideal for actuating switches, locking with a bolt, opening a flap or switching points. By selecting the armature counterpart, a defined force characteristic can be set. If the design of the systems needs to be particularly energy efficient, the use of a permanent magnet is recommended. This can save up to 80% of the energy required as compared to conventional systems.

Depending on the application, rotary magnets can also be used for this purpose. Unlike linear solenoids, rotary magnets execute a limited rotational movement on their axis. In the field of sorting technology in particular, but also with locks, rotary magnets can be the ideal solution.

Switching - dosing (fluid technology)

Valves controlled electromagnetically regulate the flow of liquid or gaseous media. This is done using proportional solenoids, which unlike normal linear solenoids have a set force-current characteristic in both directions of movement, so that the valve spool occupies exactly the same position for both the upward and downward movement when current is applied.

In less complex cases, it is done using switching magnets (black and white magnets) which can simply switch a valve on or off.

Brake

Elevator brake solenoids are linear solenoids that control brakes in drive systems by opening the brake shoes against a spring. They are used mainly in drives for elevator equipment and escalators.

Hold - clamp - secure

The primary purpose of holding magnets is to produce no mechanical kinetic energy, but to fix an armature plate with the components attached to it, allowing so-called tripping magnets to keep springs tensioned, door holding magnets to prevent fire doors from closing, and strong holding magnets to secure components from falling down or keep doors closed.

Convey - vibrate - dose - mix - compact - separate - sort

Vibrating solenoids are AC magnets that cause components to vibrate using pulsating electromagnetic forces. They can be used in any application in which bulk materials need to be transported in one form or another. In most cases, they are used as drives for the components of a feeding system, such as conveying troughs, feeder bowls and the like.

Advantages of electromagnetic solutions

By comparison with other drive elements, linear solenoids can boast numerous advantages.

The magnet technology is extremely well researched and can be adapted to almost any application.

In the simplest case, electromagnets can be operated directly at any power outlet. However, it is also very easy to adjust the coil to different voltages and frequencies. Compared to fluid technology, with its requirement for compressed air or hydraulic fluid, electric power as an energy source is available almost everywhere, which means that the electromagnet also has the edge over other technologies in terms of investment and operating costs.

Finally, electromagnets can be used more quickly, more intelligently and more flexibly with electronic controls. Electromagnets display their strengths particularly in the area of small displacement ranges. And in terms of wear, noise and other properties, it is usually possible to find the ideal design, no matter what application. We'll be happy to advise you on the solution to your particular issues.

Operating principle of an electromagnet

The operation of an electromagnet is based on the fact that a conductor with electric current flowing through it, generates a magnetic field in its environment.

When an electrical conductor is wound into a coil, the magnetic fields for each of the individual coils overlap to form a common magnetic field, which then encompasses the entire coil. The strength of the resulting magnetic flux can be boosted considerably by ferromagnetic components (housing, pole core, magnetic flux guides). The magnetic circuit is completed by an armature, also ferromagnetic. The armature is movable, and can therefore perform mechanical work.

Under the principle of reluctance, the magnetic circuit of a current-carrying coil tends to reduce its magnetic resistance (air gap), determining the direction of movement of the armature, so that energising a coil provides a simple means of initiating a mechanical movement.