Abstract:
In many situations such as the cores of a rotating electrical machine and the T
joints of a multiphase transformer, the local flux density varies with time in terms of both
magnitude and direction, i.e. the flux density vector is rotating. Therefore, the magnetic
properties of the core materials under the rotating flux density vector excitation should be
properly measured, modelled and applied in the design and analysis of these electromagnetic
devices. This paper presents an extensive review on the development of techniques and
apparatus for measuring the rotational core losses of soft magnetic materials based on the
experiences of various researchers in the last hundred years.
