| Abstract |
Magnetic devices are essential components of power electronic converters. Unfortunately, they usuallyare also the bulkiest and heaviest components in the converter system. Controllable magnetic devicesusing active premagnetization are a promising approach regarding further volume and weightreduction. One method of active premagnetization is orthogonal biasing. To be able to use thismethod, drill holes in the ferrite core material are necessary. Because of the material's fragility andbrittleness, manufacturing ferrite cores is a difficult and expensive process. For this reason, aneffective arrangement of the drill holes is critical.In this paper a basic model of drill hole arrangement based on congruent circle packing is presentedfor circular and square core cross sections. 2D-FEM-simulations and measurement results are madefor comparison and verification. The deviations between calculation and measurement results arediscussed and opportunities for model improvement are given. |
