Vehicle stability control with electric propulsion failure for an electric vehicle driven by multiple motors

Abstract

This paper proposes a vehicle stability control (VSC) during the electric propulsion failure of an electric vehicle (EV). This EV is driven by three traction motors; one traction motor is responsible for two front wheels, while two wheel motors are responsible for rear wheels. When any one of the traction motors fails, the proposed VSC calculates new torque distribution according to a direct yaw-moment controller and a slip ratio controller. This VSC strategy is implemented in a digital signal processor. A real-time hardware-in-the-loop test is then performed on a dynamometer with a motor acting as one of the rear wheel motors, while the EV and other two traction motors are modeled with commercially available simulation tools. Experimental results show that the proposed VSC strategy is able to keep the EV safe and stable after its electric propulsion failure is detected.