Modeling The Dynamic Processes of The Electric Drive of Electric Vehicle While Wheels are Slipping

Mathematical and computer models of the electric drive of electric vehicle for dynamic processes research in case of a decrease in the traction coefficient of wheels with the road and the occurrence of slipping have been created. The models take into account the presence in the kinematic scheme of the mechanical differential, the dynamic properties of the electric motor, the nonlinearity of the dependence of the friction coefficient on the wheel slip velocity. A computer simulation of the slipping processes has been made while driving on a horizontal road, when starting and overtaking with a run over a section of reduced grip with one wheel, as well as driving downhill to a similar area with two wheels. The analysis of time diagrams has shown their full compliance with the physical concepts and laws explaining the processes, and confirmed its adequacy. This allows us to consider these models as basic for studying the processes of slipping with various types of electric motors, electric drives systems, methods of control, as well as conditions of adhesion deterioration. Such researches may allow generalized conclusions to be drawn when creating systems for the implementation of maximum traction force and microprocessor control in case of an emergency.