Research on random vibration condition of driving motor system for new energy passenger vehicle

In this paper, by formulating a unified test scheme and integrating industry forces, the data collection of vibration condition for driving motor system of 21 different types of new energy passenger vehicles was completed based on the strengthened road surface in the test site. The above data are processed by selecting the maximum vibration energy value of each frequency segment and selecting envelope of vibration curve in each direction. Finally, a random vibration curve is formed for the tested components installed in the three positions of the new energy vehicle powertrain, body and drive motor. The final vibration curve were compared with the ISO 16750.3 CD draft. It is found that the general trend of vibration conditions constructed in this paper is consistent with the ISO draft. However, the vibration energy value is higher than ISO draft and higher than the measured vibration energy value of each enterprise. It is proved that the vibration condition formed by taking envelope of vibration curve is different from that of the actual driving motor. In this paper, further rectification measures are proposed to ensure the rationality of the subsequent construction of working conditions.