A method for charging a superconducting-switch-free superconductively closed circuit with a sub-circuit comprising an entry connection area (6a) and an exit connection area (6b) dividing the sub-circuit into a first branch (1) with a first inductance L1 and a second branch (2) with a second inductance L2, and currents leads (3), comprising: Choosing the positions of the connection areas (6a, 6b) and/or the geometry of the branches (1, 2) and/or the cross sections of the branches (1, 2) such that the first inductance L1 is lower than the second inductance L2; modifying an initial current I0 (I0?0) by feeding a supply current Iin into the circuit comprising: 10(a) Increasing the supply current until a first partial current in one branch reaches the critical current, (b) Further increasing the supply current to ?a resulting in a second partial current in the other branch, (c) Reducing the supply current Iin to 0A, resulting in a remanent circuit current within the circuit.

A superconducting magnet includes superconducting magnet coils (C.sub.1, C.sub.2, C.sub.3, C.sub.4, C.sub.5, C.sub.6, S.sub.1, S.sub.2) disposed inside a magnet cryostat (12). The superconducting magnet coils generate a static (B.sub.0) magnetic field when an electric current flows in the superconducting magnet coils. A superconducting B.sub.0 compensation circuit (30, 60, 70) is also disposed inside the magnet cryostat, and is coupled with the superconducting magnet coils to passively reduce temporal variations in the B.sub.0 magnetic field generated by the superconducting magnet coils. An electric current sensor (40) is also disposed inside the magnet cryostat and is connected to measure electric current flowing in the superconducting B.sub.0 compensation circuit. An active B.sub.0 compensation component (50) is operatively connected with the electric current sensor to receive the measurement of electric current flowing in the superconducting B.sub.0 compensation circuit and to provide active B.sub.0 magnetic field compensation based on the measured electric current.

A magnet arrangement for interacting with drive coils of an electric motor comprises a first drive magnet, a second drive magnet, and a compensation magnet arranged between a coil-facing side of the magnet arrangement and a coil-averted side of the magnet arrangement. The compensation magnet is arranged between the first drive magnet and the second drive magnet. The first drive magnet has a first cross-sectional area, the second drive magnet has a second cross-sectional area, and the compensation magnet has a third cross-sectional area; e.g., with a coil-facing width of the first cross-sectional area and a coil-facing width of the second cross-sectional area in each case greater than a coil-facing width of the third cross-sectional area, a coil-averted width of the third cross-sectional area greater than the coil-facing width of the third cross-sectional area, and the third cross-sectional area undercuts the first and second cross-sectional area on the coil-averted side.

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.

A method for adjusting a magnetic field of a magnetic resonance tomography (MRT)-device having a magnet includes: transferring the magnet from an operating state to a non-operating state in a ramp-down mode; subsequently transferring the magnet from the non-operating state to the operating state in a ramp-up mode; observing a reference parameter different from the magnetic field; setting a target value for the reference parameter; comparing the observed reference parameter to the target value; and finishing the ramp-up mode when the reference parameter reaches the target value.

An active feedback controller for a power supply current of a no-insulation (NI) high-temperature superconductor (HTS) magnet to reduce or eliminate the charging delay of the NI HTS magnet and to linearize the magnet constant.

A high-temperature superconducting flux pump system comprises a flux pump body, a superconducting load, and a stator group. A double-pancake coil group comprises at least one double-pancake coil. The stator group comprises at least one stator. The flux pump body has an air gap for receiving the stator group. The superconducting load and the stator group are connected to form a closed circuit. The high-temperature superconducting flux pump system has a simpler structure, solves the problem of low charging rate of magnets, and greatly reduces the power cost without changing the magnet structure and winding cost.

A magnetic resonance system may include a magnetic resonance magnet and a storage container configured to accommodate the magnetic resonance magnet. The storage container may also contain an endothermic liquid. The magnetic resonance system may further include a ramping-down device configured to trigger releasing electric energy by the magnetic resonance magnet. The first ramping-down device may include an electric energy consumption device configured to consume at least a portion of the released electric energy by the magnetic resonance magnet.

A superconducting magnet includes a cooling tank containing a cooling medium and at least one superconducting circuit configured for generating a magnetic field. The superconducting magnet further includes a power supply connected to the superconducting circuit(s) for energizing the superconducting circuit(s) and a superconducting switch electrically connected across ends of the superconducting circuit(s). The superconducting switch includes a superconducting winding and a thermal conduction member having a first end thermally coupled to the superconducting winding and a second end thermally coupled to the cooling medium within the cooling tank. The thermal conduction member includes, at least, a first layer and a second layer. The first layer is constructed of a metal material having a first thermal conductivity. The second layer supports the first layer and is constructed of a material having a second thermal conductivity that is lower than the first thermal conductivity.

Disclosed is a conduction-cooled magnetic flux pump, comprising a refrigerator, a cooling capacity conducting part, a cooling capacity conducting plate, a high-temperature superconducting coil, a high-temperature superconducting tape, an L-shaped machined part, a dynamic sealing device, a motor, a rotating shaft, a bow-shaped epoxy resin machined part, a permanent magnet rotor disk, and a permanent magnet. The cooling capacity conducting plate is connected to the refrigerator, the high-temperature superconducting coil is installed on the cooling capacity conducting plate, the high-temperature superconducting tape is fixed to the cooling capacity conducting plate by the L-shaped machined part. An output end of the motor is connected to one end of the rotating shaft through the dynamic sealing device, the other end of the rotating shaft is rotationally connected to the bow-shaped epoxy resin machined part. The permanent magnet rotor disk is installed on the rotating shaft and rotates along with the rotating shaft.