Load distribution analysis of wheels-side electric drive system based on city driving cycles

Based on city driving cycles, this study analyzes the load distribution of the wheels-side electric drive (WSED) system for vehicles. The input load and speed are defined based on the output torque of motor, and its load characteristics are analyzed by employing gear counting method. The load distribution is determined by stratified sampling method, which follows a mixed Gaussian distribution. Moreover, the goodness-of-fit test and the extreme load extrapolation are performed to demonstrate the accuracy of the load distribution for the WSED system. The results can facilitate continued advancement in fatigue life prediction and reliability-based design for the WSED system.