SELF-COMMUTATED INVERTER WITH PULSE-WIDTH MODULATION OF OUTPUT VOLTAGE Russian patent published in 2011 - IPC H02M7/539 

FIELD: electricity.

SUBSTANCE: self-commutated inverter with pulse-width modulation of output voltage includes bridge diagram of inverter, output L-shaped LC-filter and differs by the fact that it has control system containing transformer-rectifier unit, sawtooth-voltage generator, pulse shaper, sine voltage master generator, curve-type generator, the first and the second AND logic elements, the first and the second distributing-amplifying units; at that, the first and the second inputs of transformer-rectifier units are connected to the first and the second outputs of self-commutated inverter, and its output is connected to the first input of pulse shaper, the second input of which is connected to output of sawtooth-voltage generator; output of pulse shaper is connected to the first inputs of the first and the second AND logic elements, the second inputs of which are connected through the first and the second inputs of curve-type generator to output of sine voltage master generator; outputs of the first and the second AND logic elements are connected to inputs of the first and the second distributing-amplifying units respectively; the first and the second outputs of the first and the second amplifying-distributing units are connected to control inputs of transistors of bridge diagram of single-phase voltage inverter.

EFFECT: improved stability.

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