Improved coupled inductor loss optimization of the Flyback SMPS

Abstract

The paper presents the loss model of the Flyback Transformer or coupled inductor loss optimization. The coupled inductor losses can be put into three major categories as core hysteresis losses, core eddy current losses, and winding copper losses. Transformer loss is sometimes restricted directly by the need to attain the required overall power converter efficiency. More often, transformer losses are limited by a maximum hot spot temperature rise at the core surface within the center of the windings of the Flyback switch mode power supply (SMPS).