Superconducting strand for alternating current
March 13, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3618205 3657466 3699647 Composite materials Electrical superconductor Stabilized super-conductor having a diffusion-inhibiting layer therein and method of producing same Aluminum-stabilized superconducting wire Method for the manufacture of a stabilized filament superconductor having a high proportion of stabilization material Aluminum-stabilized NB3SN superconductor Forced flow superconducting cable and method of manufacture Patent #: 4857675 InventorsAssigneeApplicationNo. 668878 filed on 03/13/1991US Classes:174/125.1, Superconductors174/128.1, Plural strand174/130, Annular174/131R, With wall support257/E39.017Permanent superconductor devices (EPO)ExaminersPrimary: Nimmo, Morris H.Attorney, Agent or FirmForeign Patent References
International ClassH01B 012/00Foreign Application Priority Data1990-03-30 JPAbstractThere is provided a superconducting strand for alternating current which is formed by stranding 13 or more superconducting wires having a diameter smaller than that of a non-magnetic core member in a single-layered form on the outer peripheral surface of the core member and which can efficiently remove heat caused by AC loss, avoid a quenching phenomenon and stably maintain the superconducting state. Preferably, an electrically insulataive braided layer formed of polyester fiber is interposed between the core member and the stranded superconducting wires and stable insulation can be maintained therebetween, thereby preventing flow of coupling current caused by defective insulation and suppressing partial heat generation. The superconducting wire contains a large number of NbTi superconducting filaments and a non-magnetic stainless steel wire can be preferably used for the core member. | |
