The analysis of principles of continuously variable transmission of tractors

BACKGROUND:Modern agricultural activity requires the use of hightech equipment such as, in particular, a multifunctional tractor, which, according to actual trends, should be an autonomously controlled mobile power plant. In modern tractors, meeting current requirements, multiflow shaft-planetary gearboxes with cumulative effect are used.
 AIMS:Comparison operation principles two types automatic tractor transmissions: hydrostatic drive and electromechanical drive.
 METHODS:During research, literature review printed online publications technical description transmissions considered design was carried out.
 RESULTS:The were considered: (Fendt VarioDrive) (Ruselprom-electroprivod LLC).
 The principle Fendt VarioDrive transmission (planetary mechanical branches) consists dividing torque coming from internal combustion engine by planetary gearbox into branches, followed summation flows collecting shaft. change gear ratio movement direction is ECU means controlling branch transmission. nominally continuously variable due absence gears as such.
 set traction electrical developed Ruselprom- electroprivod LLC, installed on includes:
 synchronous motor generator converter microprocessor control system;
 asynchronous central DC-DC for energy supply auxiliary equipment.
 converters integrated electronics unit;
 top-level controller controls indicator panel drivers cab.
 system provides full its functioning engine. based essentials hybrid transport operation. Tractor possible one ranges: range 1, operational (0...18 km/h) 2, (0...42 km/h)
 CONCLUSIONS:Due concept electric units, layout solutions having their more promising applicable future, especially trailed equipment.