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Modelling of Cross Saturation Effect in Interior Permanent Magnet Synchronous Machines Using Magnetic Equivalent Circuits

This paper presents a method for calculation of flux linkages in the direct and quadrature axes of interior permanent magnet synchronous machines with a single U shaped barrier. The method is based on the magnetic equivalent circuit. For obtaining the correct results, it is essential to model the cross-saturation effect, especially for q axis current excitation due to magnetomotive force of the permanent magnets. The proposed method is fast and accurate. The paper describes modeling techniques and provides results as well as the comparisons with finite element method.

electric machines, AC machines, permanent magnet machines, magnetic equivalent circuits, cross saturation, modelling

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