A three-phase transformer includes a magnetic core and winding, wherein the magnetic core includes first and second cover plates and magnetic pillar units. The first and second cover plates are arranged opposite to each other, the magnetic pillar units are sandwiched between the first and second cover plates; a first winding is wound on a first magnetic pillar of a first magnetic pillar unit, and a fourth winding is wound on a second magnetic pillar of the first magnetic pillar unit; a second winding is wound on a first magnetic pillar of a second magnetic pillar unit, and a fifth winding is wound on a second magnetic pillar of the second magnetic pillar unit; a third winding is wound on a first magnetic pillar of a third magnetic pillar unit, and a sixth winding is wound on a second magnetic pillar of the third magnetic pillar unit.

The present disclosure provides a three-phase inductor and a power module. A current flowing through each inductor of the three-phase inductor comprises a power-frequency current component and a high-frequency current component. The three-phase inductor includes a magnetic core and a winding. The magnetic core includes a first cover plate, a second cover plate and a magnetic pillar unit; the winding wound on the first magnetic pillar and the second magnetic pillar of the corresponding magnetic pillar unit, and a current flowing through the winding surrounds said first magnetic pillar and said second magnetic pillar in an opposite direction.

The present disclosure provides a three-phase inductor and a power module. A current flowing through each inductor of the three-phase inductor comprises a power-frequency current component and a high-frequency current component. The three-phase inductor includes a magnetic core and a winding. The magnetic core includes a first cover plate, a second cover plate and a magnetic pillar unit; the winding wound on the first magnetic pillar and the second magnetic pillar of the corresponding magnetic pillar unit, and a current flowing through the winding surrounds said first magnetic pillar and said second magnetic pillar in an opposite direction.

A dual-output AC-DC power converter with balanced DC output voltages is described. The DC power source has balanced DC voltage outputs relative to DC midpoint irrespective of DC load imbalance. The input to the power source is three-phase four-wire AC voltage source. Current draws from the AC three-phase voltage source have 12-pulse near sinusoidal waveform. Ripple voltage from DC positive rail to DC negative rail is 12-pulse.

A dual-output AC-DC power converter with balanced DC output voltages is described. The DC power source has balanced DC voltage outputs relative to DC midpoint irrespective of DC load imbalance. The input to the power source is three-phase four-wire AC voltage source. Current draws from the AC three-phase voltage source have 12-pulse near sinusoidal waveform. Ripple voltage from DC positive rail to DC negative rail is 12-pulse.

The present application concerns a transformer assembly. The transformer assembly includes a step-up transformer, a step-down transformer, and a phase shifting transformer having a source side and a load side connected, respectively, to the step-down transformer and the step-up transformer.

The present application concerns a transformer assembly. The transformer assembly includes a step-up transformer, a step-down transformer, and a phase shifting transformer having a source side and a load side connected, respectively, to the step-down transformer and the step-up transformer.

A method for manufacturing magnetic circuit loops for a multi-phase transformer from a magnetic strip including: a) providing a magnetic strip of constant width in a roll wound around a first circular mandrel and extending along a longitudinal axis; b) cutting the roll into a first and a second half-roll each having a longitudinal axis comprising a respective boundary surface formed once it is separated from the other half-roll, the roll being cut slantwise at an angle θ relative to the longitudinal axis, such that the first half-roll constitutes a first loop having its boundary surface outwardly oriented relative to its longitudinal axis, while the boundary surface of the second half-roll is oriented opposite to the boundary surface of the first half-roll; c) aligning the first and second half-rolls to form two loops, including at least one sub-step of reversely unwinding and rewinding the second half-roll on a mandrel.

A transformer includes a magnetic structure and a set of coils. The magnetic structure includes a top member, a bottom member, and a plurality of legs extending between the top member and the bottom member. The plurality of legs include two outer legs. The set of coils is wound about the two outer legs of the magnetic structure and electrically coupled in series. In other examples, the magnetic structure includes a middle member positioned between the top member and the bottom and extending between the two outer legs. In such examples, a second set of coils is wound about the two outer legs of the magnetic structure and electrically coupled in series. Other example transformers and power converters such as multiphase interleaved power converters having transformers are also disclosed.

An apparatus comprises: first windings, second windings, a magnetic core, and multiple tap nodes. The first windings are primary windings of a multi-tapped autotransformer. The second windings are secondary windings of the multi-tapped autotransformer. The first windings and the second windings are wrapped around the magnetic core, the second windings disposed in a series connection between the first windings. The multiple tap nodes providing coupling of the first windings and the second windings to a power supply circuit such as a switched-capacitor converter.