Comparative study between propulsion control system failures of an electrical vehicle piloted by FOC and by DTC using dual-induction-motors structure

Abstract

This paper deals with a comparative study using numerical simulations between the failures effect caused by the speed sensor faults for a propulsion control system (PCS) of an electrical vehicle (EV) using dualinduction motors structure. The PCS strategies are achieved on two types of controls where the first one is done from a flux-oriented control (FOC) and the second one is conducted from a direct torque control (DTC). For an electric vehicle, we will often guarantee service continuity, in spite of the occurred faults such as an offset fault in speed sensor and a zero-feedback sensor speed fault which both are essentially needed in the structure of the PCS-EV. The occurred fault cited above might influence one of the dual induction motors which could be conducted an unbalance in the dual used motors and from which the control of the vehicle might be also lost. The results of the realized numerical simulations on the EV conducted by the PCS demonstrate clearly the impact of the so-called-fault. Thereafter, we can also appreciate the robustness using each used control propulsion system in despite of the occurred speed sensor fault.

Electric Vehicle Propelled by Dual-Induction Motors Structure: Experimental Results

“…In this work, in order to show the connection with prior published studies [26][27][28][29][30], we use the same electric propulsion structure purpose for an EV (Fig. 1), for which the speed difference is regulated by an electric differential based on two induction motors operating at different speeds, driving separately the rear wheels of the vehicle via fixed gearing.…”

“…From the above equations of system ( 9), the vehicle speed Wo and the difference speed Wdiff may be done simply by [26][27][28][29][30]:…”

“…Further, in previously published papers, for example, in reference [26], we used the same EV propulsion structure with robust speed control application using Fractional-Order Controller. In [27], always with the same structure, we used another application: system failures (such as an offset fault in the speed sensor and a zero-feedback sensor speed fault). In [29], the principal application is the incipient short circuit fault impact on the service continuity of an electric vehicle propelled by a dual induction motors structure.…”