The field of power applications has been increased in the last 10years in a wide range. New requirements have become more and moreimportant such as: minimum power loss at high temperature; highsaturation flux density with low temperature dependency; optimizedferrite materials for each application frequency range; and core shapeswith homogeneous distribution of flux to avoid "hot spots". It is shownhow these requirements are fulfilled by new developments in ferritematerials and core shapes and which are the criteria for selection. Asfurther support to the application engineer, PC software is presented,which enables the user to calculate power losses coreshape/materialrelated without using the "material data sheets", which are based onring core measurements
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