Analysis of Flow Field and Heat Transfer in the Air Gap of High-Speed Permanent Magnet Synchronous Motor

In order to deeply study the complex air flow and heat exchange in the air gap between the stator and rotor in a high-speed permanent magnet synchronous motor (HSPMSM). In this paper, based on the air gap domain of a 1MW HSPMSM, an annular air gap model and a slotted model are constructed, the fluid field and temperature field in the air gap model are calculated based on computational fluid dynamics (CFD) methods, and the vortex distribution and heat transfer efficiency under different slotted structures are analyzed, The stator-rotor wall slotting dimensions are selected as the design parameters, and the wall Nussel number and wind friction loss are used as the response parameters to design the sampling scheme based on the response surface method, plot the response surface, and fit the numerical relationships. which provides a reference for the heat transfer optimization of HSPMSM.