Rotational magnetisation - a type of magnetisation in which the excitation changes direction in a rotational manner. This is different from alternating magnetisation, where the direction is mostly constant, only just amplitude changes (e.g. as in transformers).
|Animation of rotational magnetisation, made from data measured for grain-oriented electrical steel, circular B of 1.7T, 50 Hz||Animation of differences between power loss measured under clockwise and anticlockwise rotational magnetisation. The differences are caused by angular misalignment of B and H sensors in a fieldmetric method1)|