Magnet technology is a highly complex and extensive field. The versatility of this technology offers us as a manufacturer many options and keeps fascinating us in new ways. The simulation of magnetic fields, for example.
Magnetic field simulation at the beginning of a development process is essential to ensure good design of the magnetic circuit. This applies to applications in sensor technology and where adhesive forces and torques have to be calculated.
With magnetic fields of simple magnet arrangements, such as the magnetic fields of axially magnetised circular magnets, the corresponding equations can be used to simulate with analytical methods. The vectors of the magnetic flux density and their individual components are calculated depending on the location in the vicinity of the magnets. This is sufficient for many applications in magnetic field sensor technology and leads very quickly to meaningful results. Fields of magnetic systems containing multipole magnets and/or soft magnetic components cannot usually be calculated analytically. Powerful FEM programs are available for the simulation of such magnetic fields. There are basically no limits to the geometry of the individual components. The FEM simulation takes full account of the magnetic material properties of all components. Prerequisite for this is knowledge of the demagnetisation curves of the permanent magnets that are used as well as the magnetisation curves of the soft magnetic elements. The FEM simulation also enables the calculation of magnetic flux densities, forces and torques as well as providing insight into the magnetic stability of the permanent magnets in the system.