A control algorithm to follow the limitations of an electric vehicle motor using the Tm4 Sumo drive as an example

Abstract

The article discusses development work on the control system of an electric vehicle considering the limitations of the TM4 Sumo power unit. Particular attention was focused on the development of a new algorithm for controlling the final phase of braking (using a retarder) at low speeds, using proprietary regulators based on the prediction of braking force values. The developed algorithm is universal (works with various drive units) automatically adjusting the setting values. At the same time, the authors paid particular attention to the elimination of the phenomenon of oscillation of the engine torque value in the final phase of braking and the synergy of the classic braking system of a commercial vehicle with electric drive braking. The article also discusses proprietary tools and software for monitoring and collecting measurement data from electric vehicles. The control algorithm is one of the products offered on the market as a solution provided by the DIGA Civil Partnership. The presented results were collected from real objects as part of implementations carried out by the authors.