is developing a radically new approach for the fabrication of
superconducting electrical machines.
Superconducting electrical machines are usually designed in the same way as
conventional machines operating at normal temperatures - with long lengths
of conductor wound into coils.
However, suitable lengths of high
temperature superconducting tape are not yet available for building other
than relatively simple demonstration equipment and this is likely to remain
the case for some years to come.
3-Cs concept eliminates the need for long lengths of conductor and utilises
film deposition and lithographic techniques widely used in the semiconductor
industry, but in three dimensions. The superconducting layers are deposited
directly onto cylindrical formers. Superconducting tracks are then
patterned using, for example, laser scribing or etching of the
superconducting layer. In this way multilayer superconducting
structures will be built up directly into the cylindrical geometry required
by the final electrical machine.
Buffer and YBCO layer deposition on an IBAD textured former followed by
laser scribing to “pattern” a coil – similar to a thread cutting operation
on a lathe. A similar structure could be achieved by an IBAD beam writing
process followed by buffer and YBCO layer depositions.