Abstract:A rapid analytical model of rotor eddy current loss for surface mounted permanent magnet synchronous machine (PMSM) with retaining sleeve was proposed, accounting for the stator space-time harmonics, eddy current reaction and circumferential segmentation of permanent magnet. When considering the circumferential segmentation of permanent magnet, the secondary harmonics and their coupling effects were ignored to simplify the calculation process. The analytical model was applied to a six phase 24 slot 14 pole PMSM. Firstly, the convergence of the results was analyzed to reduce the truncation error and improve the calculation efficiency. Then the accuracy was verified by time-stepping finite element method. The average eddy current loss obtained is in good agreement with the analytical solution of the model. Finally, the eddy current density map in the permanent magnet layer was drawn by using the analytical model. This analytical model can quickly obtain the response surface of eddy current loss, and provide theoretical basis for motor design and optimization iteration.