Single 24-pulse dry traction rectifier transformer with double-bridge windings arranged in mirroring manner

Abstract

The invention discloses a single 24-pulse dry traction rectifier transformer with double-bridge windings arranged in a mirroring manner. The double-bridge winding adopts an axial double-split double-bridge four-winding structure, and each phase winding is nested on three conjugate iron cores which are sequentially arranged at intervals; the windings comprise three sets of primary side upper bridgewindings, three sets of primary side lower bridge windings, three sets of secondary side upper bridge triangular windings, three sets of secondary side lower bridge star-shaped windings, three sets of secondary side upper bridge extension windings, three sets of secondary side lower bridge extension windings, three sets of secondary side upper bridge common side windings and three sets of secondary side lower bridge common side windings. The size of the transformer is remarkably reduced, the manufacturing cost of the transformer is reduced, the transformer manufacturing process is simplified,and the electric energy quality of a rectifier system is improved. The short circuit impedance of the primary side single-phase winding to each set of secondary side single-phase winding can be completely consistent, and the short circuit impedance of the primary side three-phase winding to each set of secondary side three-phase winding can be completely consistent, so that the circulating current between the secondary side windings of the transformer is effectively reduced, and the local winding overheating phenomenon of the secondary side windings is prevented.

Description

technical field [0001] The invention relates to the field of transformer and electromagnetic technology, in particular to a single-machine 24-pulse dry-type traction rectifier transformer with double-bridge winding mirror arrangement, which is used in an electric propulsion system. Background technique [0002] Benefiting from the characteristics of flexible operation, low noise interference and the improvement of ecological environment protection requirements, the application proportion of DC electric propulsion systems in ship electric propulsion systems and urban rail transit traction power supply systems continues to increase. In the integrated DC electric propulsion system, the rectifier transformer cooperates with the rectifier device to construct a rectification power supply system, which converts the alternating current generated by the generator on the high-voltage side into direct current, and provides electric energy for the direct current electric propulsion syste...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a single-unit 24-pulse dry-type traction rectifier transformer with double-bridge winding mirror arrangement in view of the unbalanced short-circuit impedance of the primary and secondary side three-phase windings of the existing single-set 24-pulse rectifier transformer

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