| 摘要 |
PCT No. PCT/EP89/00983 Sec. 371 Date Apr. 29, 1991 Sec. 102(e) Date Apr. 29, 1991 PCT Filed Aug. 22, 1989 PCT Pub. No. WO90/02407 PCT Pub. Date Mar. 8, 1990.A device having cores of metal oxide ceramic (for example, Y-Ba-Cu-O) for limiting a short circuit current in power supply systems. The concept provides that a choke core, when operated at a rated current, is superconductive and its shielding currents keep the resulting inductance in the choke at a low level. In the event of an overload, the winding of the choke generates a correspondingly high magnetic field in the core which puts the core into the normally conducting state. This causes the shielding currents to disappear in connection with a rise in the resulting inductance, thus limiting the current. In order to realize a particularly high inductance in the normally conductive case, the superconductive choke core may be made hollow and may be filled at least in part with a ferromagnetic material.
|
