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Abstract
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The brushless doubly-fed induction generator (BDFIG) has substantial benefits, which make it an attractive alternative
as a wind turbine generator. The aim of this work is to present a nodal-based magnetic equivalent circuit (MEC) model of the
BDFIG which provides performance characteristics and flux density distributions. The model takes into account stator
winding distributions, special configuration of rotor bars, slotting effects, teeth saturation, flux fringing and current
displacement effects. The real flux tubes are considered for creating an MEC network and calculating its non-linear elements.
A method for simplifying the rotor magnetic network has been applied and Gauss elimination with partial pivoting approach
is used to solve the equation system with sparse coefficient matrix. The model parameters are based solely on geometrical
data and thus it is an appropriate tool for population-based design studies instead of computationally intense analysis of the
finite element method. The steady-state results of the proposed model are verified experimentally. The comparisons
demonstrate the effectiveness of the proposed model especially when the core is magnetically saturated.
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