Designing Novel Brushless Doubly Fed Machines Using JMAG

Andy Knight
University of Alberta


Brushless doubly fed machines are a class of machine that has existed for over 100 years. At various points in this history, researchers have published results that indicate the potential benefits of this type of machine relative to other more common machines. However, consistently good designs are hard to find and there are several examples of poor designs in the literature. Some of the reasons for this include the difficulty in modelling the complex interaction of the magnetic fields produced by two stator windings with different pole numbers and the difficulty in accurately predicting iron losses. In the talk, the results of a systematic design approach using JMAG will be presented. The importance of nonlinear modeling to accurately predict mutual coupling between windings and leakage will be presented, together with structural analysis of the rotor design.

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