Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.