The article substantiates the possibility of using frequency drives in agricultural production, shows promising areas of their application, shows the positive qualities of frequency drives, which make it possible to confidently compete with gear drives that are widespread in agriculture. It is indicated that the use of a frequency electric drive can reduce the current and mechanical loads due to soft start. Due to the additional control inputs of the frequency converter, it is possible to synchronize the processes on the load or set the change factors for some values depending on others. For example, to establish the dependence of the speed of the irrigation pumping system on the pressure in the system. The process will be optimized because as the load on the pump increases, the flow will increase. Recommendations are given on the choice of the power of the frequency converter, taking into account the rated currents and voltage of the converter and the motor. Recommendations are given on the choice of the power of the frequency converter, taking into account the rated currents and voltage of the converter and the motor. The advantages of starting and braking electric drives with frequency regulation are shown.
Induction smelting crucible furnaces have the advantage of optimal management of the process, regulation of the capacity and have high technical indices. The research of electrical and energetic correlation of induction smelting crucible furnaces is necessary in order to analyze the work and elucidate the optimal condition of exploitation, to work out the methods of projection and determine the optimal constructions of magnet wires. The authors worked out the methods of calculating the energy of electromagnetic field according to the sections of the space of the induction system, to the selection and installation of magnet wires in order to meet the technological requirements in the best way and to achieve high energetic and exploitation indices when building the induction crucible furnaces. The work represents the influence and interrelation of the inductor and the charge with the magnet wire depending on geometrical correlation of the induction system.
The article examines the quantitative ratio describing influence of magnetic circuit on the inductor. Interrelation coefficient between magnetic circuit and inductor is studied at different geometrical properties in the heating system.
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