Method for optimization of switching frequency in frequency converters

Purpose. To present a methodology for determining the optimal switching frequency in converters and autonomous voltage inverters, load of which is an asynchronous electric motor. The based on dependences static dynamic power losses switches inverter dependence windings induction motor higher harmonics currents, also depend frequency. Methodology. Polynomial approximation energy characteristics transistors. General provisions theory electrical circuits. determination additional from analytical calculation simulation Matlab/Simulink software environment specialized program manufacturer Mitsubishi MelcoSim5.1. Findings. A method optimizing pulse-width modulation converters, motor, presented according to criterion minimum total transistors resistance windings. proposed technique allows IGBT-transistors with sufficiently high accuracy while being MelcoSim environment. calculate it shown that affects harmonic distortion factor average value phase current Provided only first performs useful action given. Originality. by presented. An active motors as function Practical value. makes possible determine ensure maximum efficiency system.