Robust Multimachine Control for Bisynchronous Propulsion Traction Chain of an Electric Vehicle

The present work contributes to the development of a multimachine control structure in a traction chain of an all-wheel-drive electric vehicle (EV). In addition, in electric traction where the traction systems are propelled by several electric motors, it is necessary to optimize the devices’ volumes and the embedded components. Thus, an interesting reduction can be obtained by the use of a single inverter that supplies several motors simultaneously. An electric motor integrated into each wheel is one of the most common configurations in EVs, which allows an independent four-wheel drive. In this work, we are seeking to impose independent control on each wheel motor using a multimotor solution for the drivetrain architectures of an EV. An interior permanent-magnet synchronous motor (IPMSM) was chosen as a traction motor. The application which is the subject of this work is to supply four electric machines by two three-phase three-levels NPC inverters and driving four wheels which contribute to the advancement of an electric vehicle. The objective of this power structure is to reproduce the behavior of an electric differential system to improve the longitudinal and lateral stability and safety of the EV during critical situations when cornering. Numerical simulations carried out represent different driving situations, and the tests done confirm the robustness of the control structure developed in the electric traction chain.