BRIDGE INVERTER Russian patent published in 2004 - IPC

FIELD: electrical engineering; single-phase transistor bridge inverters for various power supplies. SUBSTANCE: bridge inverter made in the form of single-phase transistor bridge shorted out by backward diode bridge has its diagonally opposite dc terminals connected to power supply and diagonally opposite ac terminals, to load through matching power transformer. Inverter is controlled from standard push-pull pulse-width modulator whose two output comparators control two diagonally opposite pairs of bridge transistors. R-C circuit set up of series-connected resistor and capacitor is connected in parallel with primary winding of matching power transformer. Voltage integrator is connected to capacitor terminals through electric isolation unit inputs; integrator output is connected to third input of one of comparators using for the purpose negative inverter dc voltage component feedback circuit arrangement. EFFECT: reduced size of matching transformer; reduced loss due to eliminating dc component in output voltage of bridge inverter. 1 cl, 3 dwg