Abstract: Asymmetric multi-pulse transformer rectifier unit (TRU), and associated systems and methods are described herein. In some embodiments, the transformer includes a 3-phase delta or wye primary coupled to a galvanically isolated 3-phase delta secondary with correction windings placed per the transformer schematic to provide a multi-pulse (e.g., 18-pulse or 24-pulse) asymmetric output. Such construction provides passive multiphase PTC and harmonic cancellation and allows multi pulse rectification. At the TRU level. 3-phase input power is provided to the transformer, which produces an isolated 9-phase or 12-phase output. The isolated multi-phase transformer output may be fed into a bridge rectifier, which converts AC to DC. DC output voltage may be determined by AC input voltage and transformer turns ratio.

Abstract: A power converter has a transformer having three primary windings configured to receive respective phases of a three-phase alternating current (AC) input signal in a delta configuration and three secondary windings, each split into two portions, wherein the portions are coupled together in a regular hexagon. The power converter includes a rectifier having a first rectifier path coupled between taps of the secondary windings and a positive output of the power converter and a second rectifier path coupled between taps of the secondary windings and a negative output. One of the secondary windings may be reversed with respect to the other secondary windings. The primary windings may be split with a corresponding secondary winding sandwiched between portions of the primary. One of the paths may have a different inductance than the other path.

Abstract: A power converter has a transformer having three primary windings configured to receive respective phases of a three-phase alternating current (AC) input signal in a delta configuration and three secondary windings, each split into two portions, wherein the portions are coupled together in a regular hexagon. The power converter includes a rectifier having a first rectifier path coupled between taps of the secondary windings and a positive output of the power converter and a second rectifier path coupled between taps of the secondary windings and a negative output. One of the secondary windings may be reversed with respect to the other secondary windings. The primary windings may be split with a corresponding secondary winding sandwiched between portions of the primary. One of the paths may have a different inductance than the other path.