Open AccessSensitivity of effective relative permeability for gapped magnetic cores with fringing effect
Author(s) -
Ayachit Agasthya,
Kazimierczuk Marian K.
Publication year - 2017
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
ISSN - 1751-8598
DOI - 10.1049/iet-cds.2016.0410
Subject(s) - relative permeability , permeability (electromagnetism) , magnetic field , materials science , magnetic core , inductor , magnetic flux , core (optical fiber) , nuclear magnetic resonance , condensed matter physics , physics , voltage , chemistry , composite material , electromagnetic coil , biochemistry , quantum mechanics , membrane , porosity
Magnetic component tolerances are caused by variations in air‐gap and core relative permeability. This study presents the derivation for sensitivity of effective relative permeability to variations in the relative core permeability and relative gap length for magnetic cores with and without fringing effect. The expressions for the fringing factor and effective relative permeability for the magnetic cores have been derived. The effect of air‐gap on the core properties, which includes core power loss density, magnetic flux density, and magnetic field intensity is addressed for cores used in low‐frequency and high‐frequency applications. An example core is selected to support the theoretical predictions. The expressions to determine the inductor tolerances are presented.