| 摘要 |
A device for concentrating or amplifying a magnetic flux comprises a plurality of ferromagnetic elements and a plurality of elements which, at least under certain temperature conditions, are at least partially diamagnetic, arranged adjacent to each other in a three dimensional shell surrounding the volume in which flux is concentrated. The diamagnetic elements may be superconducting. Intermediate layers of a further material having a permeability of substantially 1, such as air, may be included. The shell may be a hollow sphere or tubular body. The angular permeability of the shell tends to zero and the radial permeability tends to infinity. The flux concentrator may be used in a transformer, a motor, a nuclear magnetic resonance device, a magnetic coupling, a magnetic energy transmission device, an energy generator, or a magnetic sensor. In a magnetic sensor, a magnetic field detector is placed in the inner volume of the shell to sense the strength or gradient of the concentrated field. |
