The development process for electromagnetic drives is largely simulation-based. Irrespective of the simulation software and method used, an optimised drive design requires precise knowledge of the properties of the materials.
In the example shown here, the slope and the saturation flux density of the B(H) curve of the material used for the simulation of a proportional magnet vary. The resulting F(δ) curves of the proportional magnet demonstrate significant changes in the properties.
Taking into account the actual fluctuations in magnetic properties, particularly in the case of materials not developed specifically for magnet applications, it is clear that knowledge of the actual material parameters is essential for optimum sizing of magnetic drives.