Magnetic hysteresis occurs when an external magnetic field is applied to a ferromagnet such as iron and the atomic dipoles align themselves with it. Even when the field is removed, part of the alignment will be retained: the material has become magnetized. Once magnetized, the magnet will stay magnetized indefinitely. Maxwell by Ansys enables users to assign different materials. It also enables users to add customized B-H curve. In this video, we will be using this feature to study an armature and draw its hysteresis curve.

A geometry is imported, excitations are assigned, and we illustrate how to assign material and their B-H curve. In order to make simulation faster, a 30 degree(1/12) section of the armature is chosen. Picture below shows final B-H curve and the imported geometry.