MULTI-PHASE BRIDGE AC/DC CONVERTER Russian patent published in 2010 - IPC H02M7/10 

FIELD: electricity.

SUBSTANCE: multi-phase bridge ac/dc converter is intended for power supply to consumers with high requirements for quality of rectified voltage and electromagnetic compatibility. The proposed multi-phase bridge ac/dc converter includes n converter structures, each of which includes six-phase valve bridge and three-phase transformer, the secondary phase windings of which are connected as per the scheme forming the source of non-symmetrical six-phase system of voltages, the two values of which alternate as per the value from phase to phase through an angle of 60 electrical degrees, and phase outputs of the source are connected to ac inputs of six-phase valve bridge; at that, secondary phase windings of transformers are connected as per similar schemes, and for all the structures there established is ratio between values of voltages of adjacent phases, which alternate in non-symmetrical six-phase systems, which is determined relative to base topological sizes of phase windings (beams) of equivalent non-symmetrical six-phase starts, from ratio where electrical degrees, and n=2, 3, 4, 5, …, - total number of converter structures; at that, primary windings of transformers are made as per the schemes providing subsequently increasing (decreasing) phase shift (by Δφ=^π/_3n electrical degrees) of non-symmetrical six-phase systems of voltages relative to the first system, and n six-phase valve bridges are connected in series to each other with opposite poles; at that, extreme opposite poles of the first and the last bridges form output pins of the device.

EFFECT: proposed multi-phase bridge ac/dc converter has higher conversion quality.

5 dwg, 1 tbl