Power losses of soft magnetic composite materials under two-dimensional excitation

Soft magnetic composite materials produced by powder metallurgy techniques can be very useful for construction of low cost small motors. However, the rotational core losses and the corresponding B-H relationships of soft magn etic composite materials with two-dimensional rotating fluxes have neither been supplied by the manufacturers nor reported in the literature. This art icle reports the core loss measurement of a soft magnetic composite materia l, SOMALOY(TM) 500, Hoganas AB, Sweden, under two-dimensional excitations. The principle of measurement, testing system, and power loss calculation ar e presented. The results are analyzed and discussed. (C) 1999 American Inst itute of Physics. [S0021-8979(99)17508-X].