New measurement methods to characterize transformer core loss and copper loss in high frequency switching mode power supplies

New measurement methods to characterize transformer core loss and copper loss in high frequency switching mode power supplies are proposed. Experimental results for a planar transformer used in a DC/DC converter are presented. A time-domain finite element analysis transient solver is adopted to verify the measurement results. In addition, a detailed error analysis on each of the error sources of the proposed measurement methods is provided.