Laboratory studies of agricultural mobile power vehicles with an autonomous electric drive of traction class 0.6

Designing mobile power vehicles using the automated control of an electric drive makes it possible to increase the productivity of transport and mechanized operations in agricultural production, improve the functional and operational characteristics of these machines and reduce their negative impact on the environment. The study purpose is to conduct experimental laboratory studies of a mobile power vehicle (MPV) with an electric motor based on a wheeled tractor of traction class 0.6. The authors carried out tractor tests in a soil channel and on a concrete foundation in accordance with GOST 25836-83. They analyzed the tractor balance in the transverse and longitudinal planes and relative to the rear drive axle. As a result, they determined the traction indicators, as well as the traction and energy properties of the tractor during its rectilinear translational motion. The operating weight of the MPV was 1469.5 kg. The analysis of the obtained values of the vertical and horizontal coordinates of the center of gravity of the tractor showed an increase in its static and dynamic stability due to the modified layout solutions of its components. The changes in vertical and horizontal coordinates tend to increase the longitudinal and transverse stability of MPVs. The prototype MPV with an electric drive confirmed its traction class of 0.6: on a hard surface (concrete track), the hitch bar traction force was recorded at 8.0 to 9.0 kN; for weak soil (soil channel), the traction force amounted to 4.0 to 6.0 kN. The results of the studies will further introduce the use of electric drives on MPVs of traction class 0.6.

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