Coupled-inductor analysis and design

Abstract

A new coupled-inductor multiple air-gap structure is proposed and analyzed. These EI and EE core configurations eliminate many of the problems associated with the earlier single air-gap structures such as: high sensitivity of ripple currents to air-gap and/or turns ratio changes, complex winding arrangements and consequent high costs and inferior thermal characteristics. To facilitate the design, critical leakage parameter I is evaluated for a whole line of EI and EE cores.