Abstract:

Distributed drive electric vehicles have good passability on split ramps, but they have high power demand for driving motors, resulting in low driving efficiency and limited economy. To address the aforementioned deficiencies, a centralized and distributed dual-mode coupling drive system (DMC) capable of drive force transfer between coaxial wheels is designed to avoid single-side wheel high-intensity driving and reduce vehicle energy consumption. The study proposes a traction control system for dual-mode coupling drive electric vehicles, based on online sliding mode extremum search (SES) and the ρ_SES algorithm. This system is designed to reduce energy consumption and power demands of the drive motor, compared to distributed drive electric vehicles. The ρ_SES algorithm-based traction control effectively suppresses steady-state oscillations, protecting the motor controller. This study provides a theoretical foundation for using Distributed Motor Control (DMC) for superior traction control in electric vehicles.