According to foreign media reports, electric vehicle (EV) sales are expected to rise sharply, and according to the latest report of the market research company IHS Market, electric vehicles will account for more than 30% of new car sales in major markets by 2040, and 2016 The ratio is only 1%.

Anthony Simonin, head of the performance center of the Swedish bearing manufacturer SKF Electric Vehicle (EV) and Hybrid Electric Vehicle (HEV), said: "In order to make such vehicles work more efficiently, the drive motor must be at a very high speed and speed Up to 30000 rpm, or three times faster than ordinary industrial motors, and this will cause huge pressure on the bearings. "

In order to overcome this problem, SKF will provide new designs for bearings and bearing related polymer cages to ensure that the bearings can withstand the higher operating speeds, accelerations and temperatures generated by the motor, and will also redesign the lubricant to make the bearings here. Maintain efficiency when operating under similar conditions.

In addition, SKF will also focus on its insulation solution, which is not affected by the current leakage caused by the inverter high-frequency voltage when the motor is running at high speed. Current leakage can cause pitting corrosion in conventional conductive steel bearings, leading to catastrophic failure. SKF's hybrid bearings are made of natural insulating ceramics, which solves this problem. Compared with steel bearings, these bearings have a 40% lower density (thus able to operate at lower temperatures), but their service life is 10 times that of steel bearings and require less lubricant.

In addition, SKF will also show low-friction tapered roller bearings (TRB) used in automotive powertrains. Compared with traditional tapered roller bearings, the power loss (due to friction) of this bearing is reduced by about 50% .

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