The application conditions of new energy vehicle drive motor bearings are significantly different from traditional internal combustion engine bearings, mainly reflected in high-speed, high power density, complex load and environmental adaptability requirements. The speed of the driving motor can generally reach 10000-25000rpm, with a maximum of 30000rpm. High centrifugal force increases the stress on the retaining frame, requiring lightweight design (such as engineering plastic retaining frames). Lubricating grease is easily thrown out, and the lubrication method needs to be optimized (such as oil injection lubrication or low viscosity lubricating grease). The critical speed issue needs to be considered to avoid resonance
