Control principles of individual traction electric drive of a front loader

Abstract

Background. The operation of technological machines is associated with constant slipping of driving wheels, which can lead to increased tire wear and soil damage. This determines the relevance of works aimed at research and reduction of slip.
 The aim of the work is to analyze the considered control strategies of individual traction electric drive of front loader from the point of view of driving wheels slipping.
 Methods. The paper considers three control strategies of individual traction electric drive of a front loader - initial, with equal degrees of utilization of electric motors of wheels (strategy 1), simulation of blocked drive (strategy 2), as well as a variant of organization of traction control system (strategy 3). Using a simulation computer model of dynamics, the working process of the front loader was investigated during bulldozing operations, as well as during acceleration.
 Results. It was obtained that when bulldozing, the application of strategy 2 allows to provide almost the same slip coefficient of the driving wheels, which potentially allows to reduce tire wear and fuel consumption (compared to strategy 1). The application of strategy 3 in such conditions turned out to be inexpedient, as the slip limitation in this case will limit the speed of the operation. The simulation of the front loader acceleration process showed some advantage of strategy 3 over the others in terms of energy consumed.
 Conclusion. According to the results of the study, it was determined that when the front loader performs heavy technological operations such as bulldozing, it is rational to use control strategy 2, which simulates a locked transmission. In the case of the acceleration process, which is typical for transportation operations and driving on public roads, it is effective to use strategy 3.