Three-phase-two-phase stationary transformer with forced linked flux
View Patent ↗A three-phase-two-phase transformer including a magnetic circuit, three-phase windings, and two-phase windings, wherein the magnetic circuit includes a first column, a second column, and a third column that are magnetically connected together, the three-phase windings including a first winding, a second winding, and a third winding. The two-phase windings include a fourth winding around the first column, a fifth winding around the first column, a sixth winding around the third column, and a seventh winding around the third column, the fourth winding and the seventh winding being connected in series and forming a first two-phase phase, and the fifth winding and the sixth winding being connected in series and forming a second two-phase phase.
1. A three-phase-two-phase transformer comprising:
a magnetic circuit;
three-phase windings; and
two-phase windings, wherein:
the magnetic circuit comprises a first column, a second column, and a third column that are magnetically connected together,
the three-phase windings comprise a first winding of n 1 turns around the first column, a second winding of n 1 turns around the second column, and a third winding of n 1 turns around the third column,
the two-phase windings comprise a fourth winding of n 2 turns around the first column, a fifth winding of n′ 2 turns around the first column, a sixth winding of n 2 turns around the third column, and a seventh winding of n′ 2 turns around the third column,
the fourth winding and the seventh winding are connected in series and form a first two-phase phase, and each of the fourth and seventh windings presents a corresponding winding direction for a current flowing in the first two-phase phase, with magnetic potentials in a same direction,
the fifth winding and the sixth winding are connected in series and form a second two-phase phase, and each of the fifth and sixth windings presents a corresponding winding direction for a current flowing in the second two-phase phase, with magnetic potentials in a same direction, and
n 2 =(2+√3) n′ 2 .
2. The transformer according to claim 1 , wherein the second column is a central column situated between the first column and the third column.
3. The transformer according to claim 1 , wherein the first column is a central column situated between the second column and the third column.
4. The transformer according to claim 2 , wherein the magnetic circuit presents symmetry about an axis of rotation contained in the central column and/or about a plane of symmetry containing the central column.
5. The transformer according to claim 3 , wherein the magnetic circuit presents symmetry about an axis of rotation contained in the central column and/or about a plane of symmetry containing the central column.
6. The transformer according to claim 1 , further comprising at least one additional set of three-phase or two-phase windings.