The article presents a model of pulse width modulation based on the assessment of a certain harmonic content of the inverter synthetic voltage. The commutation moments of the pulses (with the same amplitude but with different widths) are computed in the conditions when the fundamental of the synthetic voltage is equal to the proposed sinusoidal voltage, and the high harmonics up to order 4m - 2 are null. For the numerical simulation of the model, the Matlab toolbox was used. The results of the simulation are numerically and graphically presented; they confirm the validity of the model.

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