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US 7,605,681 B2Granted
Transformer
OwnerAloys Wobbeninventor
Life of this patent
Estimating the term…
Abstract
A transformer for transferring electrical power from a stationary member to a rotating member, with a primary winding and a secondary winding, by means of annular primary and secondary windings disposed in annular slots. The transformer of the kind initially specified can be designed with smaller dimensions and can transfer more power with the same dimensions.
Claims15
A synchronous generator of a wind turbine being coupled to a transformer to transfer electrical power from a stationary member to a rotating member, the transformer comprising:
- an annular core form to receive an annular winding and having annular slots open in an axial or radial direction;
- an annular primary winding and an annular secondary winding disposed in the annular slots, the primary and secondary windings arranged axially or radially opposite each other, the primary winding disposed on the stationary member and the secondary winding disposed on the rotating member;
- and
- a plurality of members each having a U-shaped cross-sectional configuration that includes a first bar portion, a second bar portion and a crosspiece portion between the first and second bar portions and of an integral construction, each of the plurality of members having a shape of a ring segment such that each of the plurality of members is in an angular form of an arc of a ring and are a part of the annular core form, wherein the transformer is configured to transfer to a rotating portion of the generator the excitation power for operating the generator, the excitation power being more than 50 kW.
1 more element
A wind turbine, comprising:
- a transformer having:
- an annular core form to receive an annular winding and having annular slots open in an axial or radial direction,
- an annular primary winding and an annular secondary winding disposed in the annular slots, the primary and secondary windings arranged axially or radially opposite each other, the primary winding disposed on a stationary member and the secondary winding disposed on a rotating member, and
- a plurality of members each having a U-shaped cross-sectional configuration that includes a first bar portion, a second bar portion and a crosspiece portion between the first and second bar portions and of an integral construction, each of the plurality of members having a shape of a ring segment with a length of the first bar portion being shorter than a length of the second bar portion such that each of the plurality of members is in an angular form of an arc of a ring or each of the plurality of members having an annular slot open in a radial direction and the first and second bar portions being of a same length such that each of the plurality of members is in the angular form of the arc of the ring and are a part of the annular core form;
- and
- a generator having a stator coupled to the primary winding disposed on the stationary member and a rotor coupled to the secondary winding disposed on the rotating member.
3 more elements
A transformer to transfer electrical power from a stationary member to a rotating member, the transformer comprising:
- a rotatable annular core defining an open annular slot and having a plurality of members, each member of the plurality of members of the rotatable annular core having an open U-shaped cross-sectional configuration that forms a portion of the annular slot and that includes a first bar portion, a second bar portion and a crosspiece portion between the first and second bar portions, each member of the plurality of members of the rotatable annular core having a shape of a ring segment such that each of the plurality of members of the rotatable annular core is in an angular form of an arc of a ring;
- a stationary annular core defining an open annular slot and having a plurality of members, each member of the plurality of members of the stationary annular core having an open U-shaped cross-sectional configuration that forms a portion of the annular slot and that includes a first bar portion, a second bar portion and a crosspiece portion between the first and second bar portions, each member of the plurality of members of the stationary annular core having a shape of a ring segment such that each of the plurality of members of the stationary annular core is in an angular form of an arc of a ring;
- a primary winding disposed in the annular slot of the stationary annular core;
- and
- a secondary winding arranged opposite the primary winding and disposed in the annular slot of the rotatable annular core, wherein the rotatable and the stationary annular cores and the primary and the secondary windings are sized and shaped to transfer excitation power in the range of 50 kW to 120 kW to a rotor of a generator.
2 more elements
Dependencies are inferred from the claim text.