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The main stages of synthesis of high-speed agricultural AC electric drives are considered in the article. As the main criterion, the mass ratio of the rotating parts of the motor to the nominal torque can be applied. It is rational to solve the following problems in the article: synthesis and justification of the stages in the methodology for the development of high-speed electric drives; assessment of the possibilities of each of the design stages; comparison of the developed electric drives’ characteristics according to the original method with existing objects. Proposed the concept of synthesis drives that implement a limit on the operation speed and handling ability, which from the position of a systematic approach contains a number of stages: synthesis of generalized mathematical models of the object, taking into account a detailed description of the system implementing the limit operating modes; assessment of possibilities of the control object; parametric optimization of electrotechnical complex with the position of the marginal characteristics; selection of simplified mathematical models of the electric drive; synthesis of structures and control systems that realize the limit operating modes; search phase trajectories of motion of the system “Electric drive - working body” implementing extreme modes of operation. The proposed algorithm is a series of interrelated stages, where in each stage can be done the clarification on the results of second stage, for example, detailing the requirements of the technological process at the last stage of the search for phase trajectories provides for a return to the parametric optimization of the agricultural objects electric drive.

The technique of experimental research of static, dynamic and thermal characteristics of elements of automation systems based on the use of traditional equipment and special algorithms of information processing is developed. The reliability of information determination is increased by the use of the method of synchronous signal detection in determining the frequency characteristics of the studied elements of automation. An experimental study of the input and output signals of the amplifier module for two modes of operation was carried out, which confirmed the prospects for using an adaptive power supply for the output stages of the amplifier module when working with non-stationary loads. The method of setting up two modes of operation of the elements of the control system for agricultural facilities with non-stationary power sources, including the choice of parameters for the elements of the system, the experimental determination of its parameters and the choice of parameters for corrective relationships, has been proposed.

The diesel electric tractor DET-250M2 was the first tractor in the USSR with an all-electric transmission. This tractor usually works in agriculture as a cultivator and a bulldozer. However, it is often used in the railway sector, in industry, in large construction projects. Since the tractor’s electrical installation developed in the 1950s on the basis of DC collector machines is now obsolete, difficult to maintain, it was decided to upgrade the traction electric drive. The article presents the calculations of an electric machine: optimization of the rotor geometry, selection of the optimal ratio of the pole and interpolar gap, selection of the optimal number of poles of the machine, selection of the current shape, type of rotor. As an electric machine, a FRRM, which characterized by high overload capacity, a wide range of work in terms of torque and speed, was selected.

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