Power Losses Measurements of Nanocrystalline and Amorphous Magnetic Cores

The paper refers to the measurement of power loss in magnetic cores made of low-loss amorphous and nanocrystalline ribbons. Elaborated bridge method of power loss measurement is presented in the article. The most important issues of circuit analysis, circuit diagram and algorithm of measurement in closed magnetic specimens have been included in the content. Application of the suggested method is shown on the example of power loss measurements in toroidal, stacked amorphous core made of Metglas-2605S3A and toroidal, winding core made of Magnetec - Nanoperm ribbon. In the measurement results there are Power losses determined for different maximum induction by the magnetizing frequency of 50Hz included. Achieved resolution and accuracy of the method confirm the measurement results whose values have not crossem 200mW/kg. Additionally in the paper the analysis and budget of uncertainty is presented.