BRIDGE INVERTER WITH PREVENTION OF ONE-SIDED SATURATION OF OUTPUT TRANSFORMER Russian patent published in 2009 - IPC H02M7/5387 H02H7/122 H02H7/06 

FIELD: electricity.

SUBSTANCE: invention refers to electric engineering and can be used in DC-to-AC voltage converters. Bridge inverter - DC-to-AC voltage converter with bridge commutator, with protection of transformer against one-sided saturation includes device for forming voltage of the first half-period with specified value of voltage of the first half-period, calculation device of mean value of voltage of the first half-period and storing the result, device for forming the second half-period of output voltage with mean voltage value equal to stored mean voltage of the first half-period, device for measuring and storing mean voltage of the first half-period, short circuit switch of primary winding of transformer in pauses between formed pulses of the first and the second half-periods, which is formed with switches with two-sided conductivity in adjacent arms of bridge commutator, clock generator of rectangular pulses with period equal to the specified period of output voltage of bridge inverter, circuits transmitting control signals to control inputs of bridge commutator switches. Connection of the above elements is performed as it is specified in application materials.

EFFECT: improvement of mass and dimensions parametres of inverter and decrease of the number of power semiconductor switches owing to excluding an individual switch of short circuit of transformer winding in pauses between formed half-periods.

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