Analysis Of Energy Storage Inductor Eases Converter Design

Focus:

Effective core permeability is a versatile tool in the selection of magnetic core size, especially for energy storing inductors such as those used in power converters where energy is first stored in the inductor core and then released into the load. These include flybacks, boost converters and their derivatives. This article describes a method employing effective core permeability to perform a complete analysis of magnetic cores and magnetizing winding, for such converter applications. This analysis includes sizing of the core gap (if a gapped core is necessary) and determining the number of winding turns. (Analysis of winding placement, core window utilization and other mechanical aspects of the inductor design are not covered here.) The formulas presented here include initial data that can be obtained from the magnetic core datasheets.

What you’ll learn:

• How to select core size (and sizing of the core gap if needed) for an energy storing inductor
• How to use effective core permeability to optimize magnetic core size in flybacks, boost converters and their derivatives

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Author & Publication:

Gregory Mirsky, Design Engineer, Deer Park, Ill., How2Power Today, Mar 15 2022

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