Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – Superconductive type
Patent
1992-08-21
1994-05-24
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
Superconductive type
335299, 1741251, H01F 100
Patent
active
053152778
ABSTRACT:
A superconducting energy storage magnet is constructed for mounting in relatively shallow trenches or tunnels to provide superconductive energy storage for applications such as power system load leveling. The magnet includes composite superconductors arranged in substantially planar coil layers around a central axis. A first and second coil layer have an inner support structure between them to which the conductors of the layers are engaged. The inner support structure carries the magnetically induced forces on the conductors of the coils. The net radial magnetically induced force is opposed by the rigid structural material of the inner support structure and by support struts which extend from the periphery of the inner support structure to a surrounding support wall such as the wall of a trench. The conductors in each layer, and the inner support structure between them, have matching vertically (axially) undulating ripples over the circumference of the magnet. The ripples accommodate stresses imposed on the magnet during cool down from ambient temperatures to cryogenic temperatures, while the inner support structure is rigid radially to carry the magnetically induced radial forces on the conductors so that substantially no flexing of the conductors occurs during charge up and discharge of the magnet.
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Boom Roger W.
Eyssa Yehia M.
Huang Xianrui
Donovan Lincoln
Wisconsin Alumni Research Foundation
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