Finite Element Analysis of Eddy Currents in Transformer Parallel Conductors

A new approach is discussed to the finite element analysis of eddy currents flowing in parallel conductors in transformer windings. Simplified equivalent circuits are introduced in the formulation of the scalar potential, that is indispensable in the analysis of the eddy current problems, thereby clarifying its physical meanings and showing a general formulation procedure. The validity of the approach thus developed is verified through evaluating results of calculations by circuit equations. In addition, the approach was applied to a model transformer and the analysis results were compared with those measured with respect to the circulating currents flowing in the parallel conductors that make up a transformer winding.