Wielopoziomowy falownik w zastosowaniu do silnika indukcyjnego lub autonomicznej prądnicy indukcyjnej albo synchronicznej

In the paper a multilevel inverter for purpose in a supply of induction motor or in generation of autonomous, self-excited induction generator voltage is presented. The inverter allows elimination of the most significant harmonics 5th and 7th and other, up to 10th. In the case of motor supply in the system are not used summing transformers and thanks to the phase shifting of voltages the system is favourable in respect of harmonics in current drawn by transformer from the utility grid. The system in purpose of autonomous generator is soft for recipients of electrical energy and for the generator drive. In this case the inverter allows elimination influence of 6th, 18th, and 30th harmonics from voltages and currents, what allows to avoid oscillations of the shaft torque.