Ferrite Core Magnetics (Part 1): Ungapped Ferrite Cores
by Dennis Feucht, Innovatia Laboratories, Cayo, Belize, How2Power Today, Jul 14 2017
Focus:
Ferrite cores have distinct characteristics from iron-powder cores, which leads to
their usage in different power conversion applications. These differences also dictate
some different considerations when selecting and designing transformers with ferrite
cores. This two–part article discusses the qualities of both ungapped and gapped
ferrite cores, and techniques for achieving best results in transformer designs. This
part 1 examines ungapped ferrite cores, which find optimal use in transformers. This
article explains ferrite saturation and power-loss characteristics, and presents the
outline of a method for optimizing transformer design with ferrite cores, with
emphasis on the design parameter, γ, the ripple factor for maximizing either core
utilization or power transfer. Distinctions between the material characteristics and
transformer design methods associated with ungapped ferrite cores are contrasted with
those of powder cores. Finally some differences in methodology for optimizing coupled
inductors rather than transformers are noted.
What you’ll learn:
- How to understand the differences between ferrite cores and iron-powder cores
- How to optimize transformer design using gapped ferrite cores (advanced concepts)
- How to optimize coupled inductor designs using gapped ferrite cores (advanced concepts)
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