Title :
Fringing Field Formulas and Winding Loss Due to an Air Gap
Author :
Roshen, Waseem A.
Author_Institution :
Ohio State Univ., Hilliard
Abstract :
The paper describes a simple treatment for the fringing fields of an air gap in the core of a magnetic component such as an inductor or a transformer. It verifies the derived analytical formulas for the fields by using numerical (finite-element) calculations. It then applies these formulas to the calculation of high-frequency eddy-current losses for two types of winding arrangements, both of which employ thin rectangular conductors. The rectangular conductors are commonly used in flex circuit windings, printed circuit windings, and thin-film windings. The two types of winding configurations are flat and barrel wound. Each behaves in a different way as a function of the position of the conductor.
Keywords :
air gaps; eddy current losses; finite element analysis; power transformers; transformer windings; air gap; finite-element calculations; flex circuit windings; fringing fields; high-frequency eddy-current losses; inductor; printed circuit windings; thin rectangular conductors; thin-film windings; transformer; winding arrangements; Conductive films; Conductors; Finite element methods; Flexible electronics; Flexible printed circuits; Inductors; Magnetic analysis; Magnetic cores; Thin film circuits; Transformer cores; Air gap; fringing field; high frequency; inductor; motors; power conditioning; power conversion; power electronics; transformer; winding loss;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.898908