Back to results
US 6,611,408 B2Granted
Electrical transformer
AssigneeOxford Instruments PLC
InventorsPeter Hanley, Ian Leitch McDougall
Life of this patent
Estimating the term…
Abstract
The present invention relates to an electrical transformer which includes a primary winding coupled to first and second magnetic circuits. A magnetic flux is driven through the magnetic circuits by the primary winding. First and second secondary windings are also provided, each associated with a respective one of the magnetic circuits and being electrically connected together in series opposition. A closed superconducting fault current winding is also provided to link with the magnetic flux in the second magnetic circuit.
Claims3
A method of controlling fault current in a transformer, comprising:
- inducing current in a first winding through a first magnetic circuit magnetically coupled to a primary winding;
- and
- inducing current in a second winding, in series opposition to the current generated in the first winding, through a second magnetic circuit magnetically coupled to the primary winding, where the second magnetic circuit includes a closed circuit fault current winding,
- wherein the current in the second winding is increased, when current induced in the fault current winding exceeds a critical current.
1 more element
Dependencies are inferred from the claim text.