THREE-PHASE DUAL-CHANNEL CONVERSION TRANSFORMER-RECTIFIER UNIT (ALTERNATIVES) Russian patent published in 2006 - IPC H02M7/02 

FIELD: electrical engineering; power converter engineering.

SUBSTANCE: proposed unit that can be used as rectifier distinguished by improved electromagnetic compatibility with load and supply mains due to comprehensive use of potential capabilities of energy-flux dual-channel conversion has two three-phase rectifier bridges 4, 5 whose outputs are interconnected in parallel and inputs are connected to respective circuits of three-phase secondary windings 3 of transformer unit 1. Phase-by-phase delta-star series-connected to circuits of secondary windings 3 (first alternative) or to those of primary windings (second alternative) are first (6) and second (7) windings of three-phase equalizing reactor. First (6) and second (7) windings of equalizing reactor are connected differentially and, respectively, cumulatively or cumulatively and, respectively, differentially relative to three-phase windings connected to them. Introduction of equalizing reactor whose winding turn number is same as that of phase windings connected in circuits of different layout (1.6 to 1.8) makes it possible to eliminate unbalance of currents through channels and to compensate for amplitude asymmetry of voltages between secondary transformer windings of rectifying channels.

EFFECT: reduced output voltage ripples; reduced mass and size of unit.

8 cl, 5 dwg