In the field of new energy vehicles

the issue of electrical erosion in motor bearings has become one of the key factors affecting reliability and service life of vehicles. However

there is currently a lack of research on the electrical erosion characteristics of bearings at different rotational speeds. This paper constructs an electro-thermal-erosion multi-physics coupling finite element model based on the the bearing electrical erosion mechanism. The model is used to simulate the current density

discharge temperature

and pit depth of bearings at different rotational speeds. Furthermore

a single bearing electrical erosion test platform is established to conduct experiments under multiple speed conditions

and scanning electron microscopy (SEM) is employed to characterize the corrosion morphology. The results show that as the rotational speed increases

the current density and discharge temperature during bearing electrical breakdown significantly increase

and the corrosion pit also deepens. Under high-speed conditions

the bearing surface exhibits a higher density of corrosion points

and the area of the electrical erosion pits increases exponentially. The findings of this paper provide theoretical support and experimental references for the design optimization and life prediction of electric motor bearings in new energy vehicles.