Fesi energy storage inductor

What is a Fe-Si integrated inductor?

An integrated inductor, using 0.1 mm Fe-Si alloy composite films, has been developed with a dimension of 4.8 mm × 4.5 mm × 1.0 mm thickness. The developed inductor is structured by stacking of metal alloy composite films with μ R = 19.5, which consist of mixed Fe-Si alloy powders and epoxy resin for high current application.

What are the advantages of Fesi compared to somaloy 110i 5p?

Compared to pure Fe-6.5% Si, the advantages of this new material arehigher magnetic saturation and high component density similar to that of pure Somaloy 110i 5P, as well as easy manufacturing procedures, i.e., the compaction pressure is low or moderate (800-1200 MPa vs. 1200-2000 MPa for pure FeSi) which reduces production costs.

How much Fesi should be added to lubrication?

These results clearly show a minimum in the core losses, for both high and low frequencies in both lubrication systems, with around 30-40 wt% FeSi added in the mixture, indicating that this addition renders the optimum composition for this material.

How is an integrated inductor fabricated?

An integrated inductor with a high current and high frequency was fabricated using Fe-Si metal alloy powder. The fabricated inductor was thin and had a 1 mm multilayer copper foil structure. To determine the electrical characteristics of the inductor, simulation and measurement were carried out.

How is a metal inductor structured?

The developed inductor is structured by stacking of metal alloy composite films with μ R = 19.5, which consist of mixed Fe-Si alloy powders and epoxy resin for high current application. These stacked films have an etched spiral copper trace with 9 and quarter turns for 4 layers on each film.

How to evaluate the performance of the developed inductor?

In order to evaluate the performance of the developed inductor, inductance and DC resistance were simulated and measured. The simulated result of 1.05 μ H and 83 mΩ is well coincided with measured results of 1 μ H and 88 mΩ. It is also confirmed that the inductor has a high current capacity of 3 A rated and 6 A saturated values.