Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Relationship between geometric permeability μgeo calculated by Equations (21), (22), and (25) and effective permeability μBH obtained using FEMM simulation in soft magnetic annuluses 82 × 78 mm with four air gaps and total length lg from 1 × 10−4 to 1.28 × 10−2 m. The dashed line corresponds to equation μgeo= μBH.
