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In order to obtain the influence of wye (Y)-and delta (    Δ   \Delta)-connected winding on line start permanent magnet synchronous motor (LSPMSM), taking a 15 kW LSPMSM as an example, the two dimensional (2-D) finite element method (FEM) and analytical method are used to calculate the motor performance. The influence of 3rd harmonic current inΔ   \Delta-connected winding on the motor electromagnetic field is analyzed. The difference of the losses and capacity of starting and overload between the Y- andΔ   \Delta-connected winding are studied. Finally, combined with the related experiments, the correctness of the calculation model is verified and the reliability of the research results are proved.

Influence of Wye-and Delta-Connected Winding on the Performance of Line Start Permanent-Magnet Synchronous Motor