Some practical issues related to core loss measurement using impedance analyzer approach

An automated high-frequency core loss measurement method based on the use of an impedance analyzer was discussed by P.M. Gradzki and F.C. Lee (see HFPC proc., p.108-15, 1991). This measurement setup is convenient to use in high-frequency core characterization, but has certain limitations for some types of core loss measurement. Specifically, additional attention must be paid in order to obtain reliable results for core loss characteristics under DC bias, low frequency core loss measurement, and core loss measurement of low permeability materials. This paper addresses these issues and presents an error analysis of the use of a parallel capacitor for power factor compensation.<
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