Life reliability test of electric vehicle drive motor bearing

CAI Liping1, ZHANG Bin1, ZHANG Youliang1, YAN Changchun2, ZHOU Qibin1, XV Jianbo1

(1.Zhejiang Testing and Inspection Institute for Mechanical and Electrical Products Quality, Hangzhou 310051,
China; 2.Hangzhou C&U Motor Bearing Co., Ltd., Hangzhou 310022, China)

Abstract: Aiming at the problems of short service life and low reliability of the domestic drive motor bearings of the Electric Vehicle, whose work characteristics were analyzed. The simulated test conditions of the life reliability for the drive motor bearings and a design technique for the simulated bench tester were proposed. The comparative bench simulation life test between the domestic and foreign drive motor bearings of same type, was preusemeed the results show that the main gap of their life reliability is caused by lubrication, sealing and high and low temperature performance. The optimization measures for the life reliability improvement of the domestic drive motor bearings were proposed.

Key words: electric vehicle; drive motor bearing; life reliability; test