Magnetic annular gap systems

BRUGGER is your expert for innovative solutions in the field of magnet technology. One example of this is our customised ring gap systems, which take magnetic force to a new level thanks to a clever combination of permanent magnets and ferromagnetic materials.

Magnetic ring gap systems: Powerful and reliable for industrial applications

Powerful and efficient magnetic ring gap systems are innovative solutions for demanding industrial challenges. They offer high force density, precise control, low friction and wear-free operation, resulting in increased reliability and service life of machines and systems.

Magnetic ring gap systems are widely used in industry as they offer precise and efficient solutions for various requirements. In position measuring devices, they enable high-precision position measurements through exact magnetic field evaluation. They are used as actuators in valves or flaps to generate precise movements or forces. Magnetic annular gap systems enable reliable movements and contribute to the efficiency and accuracy of industrial processes. The force is transmitted contactlessly through the magnetic field.

Both permanent magnets and electromagnets can be used in ring gap systems, depending on the specific application:

Ring gap systems with permanent magnets:

Advantages: Simple design, no additional power supply required, robust and low maintenance.
Disadvantages: Limited torque and force control options.
Applications: Position detection in applications with low force requirements.

Ring gap systems with electromagnets:

Advantages: Possibility of precise force control by changing the current.
Disadvantages: More complicated design, need for an external power supply.
Applications: Actuators (valve control, switches), systems with higher force requirements.

The choice between permanent magnets and electromagnets therefore depends on the requirements of the respective application; we only deal with permanent magnets.

Application examples for annular gap systems

Ring gap system for ventilators

Classic annular gap systems

Functionality

A magnetic annular gap system is an innovative technology that is also used in modern ventilators, for example, to improve their efficiency and reliability. This system utilises the power of magnets to ensure precise and quiet control of the air flow, which is crucial in medical care.
Its operation is based on a magnetic field generated in an annular gap. This field controls the movement of mechanical components without the need for physical contact. This minimises wear and tear and extends the service life of the ventilator. The system also enables high-precision adjustment of the air flow, which is essential for optimal and safe patient care.

Further application examples:

Loudspeakers and microphones:
The annular gap enables precise control of the diaphragm vibration and ensures a clear, powerful sound.
The centre core of the system (inner pole) is located in the centre. The outer ring forms the second pole. A coil wound on a thin carrier and connected to a diaphragm can be immersed in this annular gap. When current flows through the coil, a magnetic field is created that interacts with that of the permanent magnet. The coil moves back and forth - this movement is transferred to the membrane, which then generates sound waves.
With a microphone, it is the other way round: the sound waves that hit the diaphragm move the diaphragm with the coil in the annular gap (magnetic field). A current is induced in the coil, which in turn serves as an electrical signal for sound recording.
Industrial systems: Magnetic ring gap systems are also used in industrial systems such as pumps, compressors or turbines.
Valve control: Magnetic ring gap systems can be used to control valves in various applications, e.g. in hydraulic systems.
Switches and relays : Magnetic ring gap systems can be used as switches or relays.

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Whether metal, plastic or other materials - we manufacture according to your individual requirements, regardless of the material. Whether small series or large-scale production - we adapt flexibly to your requirements. Thanks to our extensive expertise and modern machinery, we can realise a wide range of manufacturing processes.

Magnetic components are just one part of our expertise. We will be happy to advise you on the development of customised solutions that are perfectly tailored to your requirements.

How does a magnetic ring gap system work and what are its advantages?

A magnetic ring gap system is a special arrangement of magnets and a ring-shaped gap that can be used for various applications. It essentially consists of two concentric rings, with the inner ring containing one or more magnets and the outer ring consisting of a ferromagnetic material that conducts the magnetic flux. There is a narrow air gap between the two rings, known as the annular gap.
The magnets in the inner ring generate a magnetic field that is conducted through the annular gap and the outer ring. This magnetic field can be used for various purposes, e.g. to generate forces, to move objects or to shield magnetic fields. The geometry of the annular gap system enables precise control of the magnetic field and high efficiency in the utilisation of magnetic energy.

Advantages of magnetic ring gap systems

High force density: A high force density can be generated due to the concentrated arrangement of the magnets and the narrow annular gap. This is particularly useful in applications where high forces are required in a confined space, e.g. in linear drives or actuators.
Precise control: The geometry of the annular gap system enables precise control of the magnetic field and therefore the forces or movements generated. This is important in applications where high accuracy is required, e.g. in positioning systems or robots.
Low friction: As the movement of the parts is contactless, the friction in magnetic ring gap systems is very low. This results in less wear and higher efficiency.
Wear-free: In contrast to mechanical systems, which rely on direct contact and friction, magnetic ring gap systems are not subject to wear. This leads to a longer service life and lower maintenance costs.