Abrégé

A superconducting circuit having: a charging loop; a load loop including a superconductor; a superconducting connection which is simultaneously part of the charging loop and the load loop; and a controller to control a state of the connection between a first and second conductive states. In both the first and second states the connection is in a superconducting state, but a resistance or impedance of the superconducting connection is higher in the first conductive state than in the second conductive state such that the superconducting circuit is configured to induce flux flow between the charging loop and the load loop when the connection is its first conductive state, and inhibits flux flow between the charging loop and the load loop when the connection is its second conductive state; in particular wherein the superconducting connection operates in a flux flow regime in the first conductive state.

Classes IPC  ?

• H01F 6/00 - Aimants supraconducteursBobines supraconductrices
• H01F 6/06 - Bobines, p. ex. dispositions pour l'enroulement, l'isolation, les enveloppes ou les bornes des bobines

Abrégé

We describe a superconducting circuit comprising: a charging loop; a load loop comprising a superconductor; a superconducting connection which is simultaneously part of the charging loop and the load loop; and a controller to control a state of the connection between a first and second conductive states. In both the first and second states the connection is in a superconducting state, but a resistance or impedance of said superconducting connection is higher in said first conductive state than in said second conductive state such that the superconducting circuit is configured to induce flux flow between the charging loop and the load loop when the connection is its first conductive state, and inhibits flux flow between the charging loop and the load loop when said connection is its second conductive state; in particular wherein the superconducting connection operates in a flux flow regime in the first conductive state.

Classes IPC  ?

• H01F 6/00 - Aimants supraconducteursBobines supraconductrices

Abrégé

This invention relates mainly to methods and apparatus for magnetizing a superconductor. We describe a method of changing the magnetization of a superconductor, by automatically controlling a magnet to generate a wave of magnetic flux, in particular a standing wave of magnetic flux, adjacent to the surface of said superconductor. In preferred implementations of the method the superconductor is positioned within a magnetic circuit including a ferromagnetic or ferrimagnetic material and the method further comprises regulating the magnetic circuit during or after changing the superconductor's magnetization.

Classes IPC  ?

• H01F 1/00 - Aimants ou corps magnétiques, caractérisés par les matériaux magnétiques appropriésEmploi de matériaux spécifiés pour leurs propriétés magnétiques
• H01F 6/00 - Aimants supraconducteursBobines supraconductrices
• G01R 33/3815 - Systèmes pour produire, homogénéiser ou stabiliser le champ magnétique directeur ou le champ magnétique à gradient utilisant des électro-aimants avec des bobines supraconductrices, p. ex. leurs alimentations

Abrégé

We describe a superconducting magnet system for generating a uniform magnetic field. The system has at least three magnets in two sets, a first of the sets comprising an oppositely disposed pair of superconducting magnets, a second of the sets comprising at least one further magnet. The further magnet is disposed such that there exists a 3D region in which a magnet field produced by the further magnet is substantially parallel to a magnetic field produced by the pair of superconducting magnets. One of the sets of magnets is configured to produce first, bulk component of the magnetic field in the 3D region and a second of the sets of magnets is configured to produce a correction to the bulk component of the magnetic field in the 3D region to reduce a non-uniformity of the bulk component of the magnetic field in the 3D region.

Classes IPC  ?

• H01L 39/00 - Dispositifs utilisant la supraconductivité ou l'hyperconductivité; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives

Abrégé

This invention relates mainly to methods and apparatus for magnetising a superconductor. We describe a method of changing the magnetisation of a superconductor, by automatically controlling a magnet to generate a wave of magnetic flux, in particular a standing wave of magnetic flux, adjacent to the surface of said superconductor. In preferred implementations of the method the superconductor is positioned within a magnetic circuit including a ferromagnetic or ferrimagnetic material and the method further comprises regulating the magnetic circuit during or after changing the superconductor's magnetisation.

Classes IPC  ?

• H01F 6/00 - Aimants supraconducteursBobines supraconductrices
• H01F 13/00 - Appareils ou procédés pour l'aimantation ou pour la désaimantation
• H01L 39/10 - Dispositifs utilisant la supraconductivité ou l'hyperconductivité; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives - Détails caractérisés par les moyens de commutation

Abrégé

A superconducting magnet system for generating a uniform magnetic field, the system comprising at least three magnets in two sets, at least a first of said sets comprising an oppositely disposed pair of superconducting magnets, a second of said sets comprising at least one further magnet, wherein said further magnet is disposed such that there exists a three dimensional region in which a magnet field produced by said further magnet is substantially parallel to a magnetic field produced by said pair of superconducting magnets, and wherein one of said sets of magnets is configured to produce first, bulk component of said magnetic field in said three dimensional region and a second of said sets of magnets is configured to produce a correction to said bulk component of said magnetic field in said three dimensional region to reduce a non-uniformity of said bulk component of said magnetic field in said three dimensional (3D) region.

Classes IPC  ?

• H01F 6/00 - Aimants supraconducteursBobines supraconductrices

Abrégé

This invention relates to methods and apparatus for magnetizing a superconductor, in particular to flux pumps, and to new types magnetized superconductor. A method of changing the magnetisation of a superconductor, the method comprising automatically controlling a magnetic field to generate a wave of changing magnetic flux travelling over a surface of said superconductor.

Classes IPC  ?

• H01L 39/24 - Procédés ou appareils spécialement adaptés à la fabrication ou au traitement des dispositifs couverts par  ou de leurs parties constitutives

Abrégé

This invention relates to methods and apparatus for magnetising a superconductor, in particular to flux pumps, and to new types magnetised superconductor. A method of changing the magnetisation of a superconductor, the method comprising automatically controlling a magnetic field to generate a wave of changing magnetic flux travelling over a surface of said superconductor.

Classes IPC  ?

• H01F 6/00 - Aimants supraconducteursBobines supraconductrices
• H01L 39/10 - Dispositifs utilisant la supraconductivité ou l'hyperconductivité; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives - Détails caractérisés par les moyens de commutation
• H01L 39/16 - Dispositifs commutables entre les états normal et supraconducteur

Abrégé

This invention relates to methods and apparatus for magnetising a superconductor, in particular to flux pumps, and to new types magnetised superconductor. A method of changing the magnetisation of a superconductor, the method comprising automatically controlling a magnetic field to generate a wave of changing magnetic flux travelling over a surface of said superconductor.

Classes IPC  ?

• H01F 6/00 - Aimants supraconducteursBobines supraconductrices