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: Asymmetric AC to DC autotransformer for turboelectric propulsion, and associated systems and methods are described herein. In one embodiment, an asymmetric AC to DC autotransformer includes: a first coil, a second coil and a third coil of a delta winding Each coil is energized at its corresponding input phase. A first plurality of correction windings coupled to the first coil, a second plurality of correction windings coupled to the second coil, and a third plurality of correction windings coupled to the third coil. A bridge rectifier having a plurality of rectifiers is coupled to respective individual correction windings. Phases of the individual correction windings are asymmetric such that individual phase voltages are controlled relative to the opposite input phase. Voltages are unbalanced relative to neutral.

Abstract: Asymmetric AC to DC autotransformer for turboelectric propulsion, and associated systems and methods are described herein. In one embodiment, an asymmetric AC to DC autotransformer includes: a first coil, a second coil and a third coil of a delta winding Each coil is energized at its corresponding input phase. A first plurality of correction windings coupled to the first coil, a second plurality of correction windings coupled to the second coil, and a third plurality of correction windings coupled to the third coil. A bridge rectifier having a plurality of rectifiers is coupled to respective individual correction windings. Phases of the individual correction windings are asymmetric such that individual phase voltages are controlled relative to the opposite input phase. Voltages are unbalanced relative to neutral.