Purpose. Conduct a study of commutation processes and develop a methodology for determining the switching frequency of semiconductor elements in the converter for high-voltage electromechanical systems to minimize electrical losses during their operation with fan loads. Methodology. Methods of multi-criteria and single-criteria optimization for finding the optimal values of electrical losses in an electromechanical system, methods for solving first-order differential equation systems, and analytical methods. Findings. To improve the energy efficiency of a high-voltage electromechanical system for stationary industrial fan installations without modifying their structural design, the level of total losses has been assessed. A target function has been constructed to represent the dependence of total losses in the electric drive on the switching frequency of power switches and the harmonic distortion coefficients of the stator and rotor currents in a high-voltage wound-rotor asynchronous motor. Through approximation, a generating dependence of the switching frequency of the converter’s power switches on the harmonic distortion coefficient of the stator and rotor currents of the async
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