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Virtual Air Gap Length Computation With the Finite-Element Method

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2 Author(s)
Adalbert Konrad ; Dept. of Electr. & Comput. Eng., Toronto Univ., Ont. ; Jean F. Brudny

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

Published in:

IEEE Transactions on Magnetics  (Volume:43 ,  Issue: 4 )