US 2010/0148900 A1 · SYMMETRICAL AUTO TRANSFORMER WYE TOPOLOGIES

Abstract

Various embodiments of multi-phase transformers are disclosed. For example, a transformer includes primary windings, secondary windings and third windings. Primary windings, secondary windings and third windings may include sub windings coupled to form junctions. Primary windings are coupled at ends to form a delta configuration. Secondary windings are coupled to primary windings. Third windings are coupled to primary windings and secondary windings. Secondary windings and the third windings may be magnetically coupled to primary windings. The outputs at second ends of third windings are greater than the outputs at the second ends of secondary windings. In some embodiments, the outputs at adjacent second ends of the third windings are substantially equal. In other embodiments, a phase angle difference of outputs at adjacent second ends of third windings is substantially equal. In some embodiments, the phase angle difference of outputs at adjacent second ends of secondary windings is substantially equal.

Claims41

Dependent claims

A multi-phase transformer, comprising:

a first group of windings having a plurality of primary windings and each primary winding having a first end and a second end;
wherein the first end of each of the primary windings is coupled at a common junction to form a wye configuration;
and
wherein each of the primary winding is configured to receive a phase of a multi-phase input voltage at the second end of each of the primary windings;
a second group of windings having a plurality of secondary windings and each secondary winding has a first end and a second end;
wherein each secondary winding is magnetically coupled to a primary winding;
and
a third group of windings having a plurality of third windings and each third winding has a first end and a second end;
wherein each third winding is magnetically coupled to a primary winding from among the plurality of primary windings such that an output voltage at the second end of the third windings is higher than an output voltage at the second end of the secondary windings and the second end of the primary windings.

6 more elements

A multi-phase transformer, comprising:

a first group of windings having a plurality of primary windings and each primary winding having a first end and a second end;
wherein the first end of each of the primary windings is coupled at a common junction to form a wye configuration;
wherein each of the primary windings includes one or more sub primary windings coupled in series, and a junction of two sub primary winding define an interior junction;
and
wherein each of the primary windings is configured to receive a phase of a multi-phase input voltage at the second end of each of the primary windings;
a second group of windings having a plurality of secondary windings and each secondary winding has a first end and a second end;
wherein each secondary winding is magnetically coupled to a primary winding;
and
a third group of windings having a plurality of third windings and each third winding has a first end and a second end;
wherein each third winding is magnetically coupled to a primary winding from among the plurality of primary windings such that an output voltage at the second end of the third windings is higher than an output voltage at the second end of the secondary windings and the second end of the primary windings.

7 more elements

Dependencies are inferred from the claim text.

Symmetrical auto transformer wye topologies

Life of this patent

Symmetrical auto transformer wye topologies

Life of this patent

Abstract

Claims41