SINGLE-PHASE AUTONOMOUS INVERTER WITH PULSE-DURATION MODULATION OF AC CURRENT Russian patent published in 2011 - IPC H02M7/539 

FIELD: electricity.

SUBSTANCE: single-phase autonomous inverter with pulse-duration modulation of AC current, comprising a bridge circuit of an inverter, made on transistors, reverse diodes, L-shaped LC-filter, differing by the fact that it has a control system, comprising a driving oscillator, a generator of a curve type, a metre of voltage deviation, a summator, a rectifier, a triangular voltage generator, a pulse shaper, the first and second logical elements AND, the first and second pulse amplifiers, besides, the first and second inputs of the voltage deviation metre are the inputs of the control system, the third input of the voltage deviation metre is connected to the third input of the driving oscillator, the second input of which is connected to the input of the curve type generator, and the first outputs of the driving oscillator and the voltage deviation metre are connected to the first and second inputs of the summator accordingly, the output of which via a rectifier is connected to the first input of the pulse shaper, the second input of which is connected to the output of the triangular voltage generator, the output of the pulse shaper is connected to the first inputs of the first and second logical elements AND, the second inputs of which are connected to the first and second outputs of the curve type generator, the outputs of the first and second logical elements AND are connected to the inputs of accordingly the first and second pulse amplifiers, the outputs of which are connected to the control inputs of the inverter bridge circuit transistors.

EFFECT: increased stability.

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