Title :
Virtual Air Gap Length Computation With the Finite-Element Method
Author :
Konrad, Adalbert ; Brudny, Jean F.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont.
fDate :
4/1/2007 12:00:00 AM
Abstract :
Virtual air gaps are created in a transformer core by a change in core permeability in the vicinity of auxiliary windings carrying dc current. A procedure for equivalent air gap length computation is established by performing finite-element analysis to obtain the change in transformer core reluctance. Results obtained from the finite-element analysis are compared with experimental and analytical results available in the literature
Keywords :
air gaps; finite element analysis; power transformers; transformer cores; transformer windings; DC current; auxiliary windings; core permeability; finite element method; transformer cores; virtual air gap length computation; Circuit faults; Finite element methods; Geometry; Iron; Magnetic analysis; Magnetic cores; Magnetic materials; Permeability; Solid modeling; Transformer cores; Air gap; finite-element methods; magnetic devices; transformers;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.892615
