Composite Ceramic Superconducting Wires for Electric Motor Applications
Abstract
This report describes progress on developing Y-123 wire for an HTSC motor. The wire is produced by spinning and heat treating fiber to produce metallized superconducting filaments. Development continued on spinning Y-123 green fiber. The diameter of continuous Y-123 green fiber was reduced to 75 microns. A belt furnace is being reconfigured for continuous sintering of fibers and a prototype cladding module for multi-filament ribbon wire is being fabricated. There has been an improvement in 77 K (self-field) critical current density of Y-123 filaments, up to 2400A/cm2 for the best filament, with 1500 A/ cm2 for a typical filament. Similar results are seen for silver clad filaments. Preliminary data suggests an important effect of specimen length on transport critical current of thin filaments of weak-linked specimens. At Emerson Electric the characteristics of DC homopolar, DC heteropolar, reluctance, and induction HTSC motors were determined theoretically. A DC homopolar and an induction motor with superconducting stator windings were selected as final candidates for the proof-of-principle motor. M. Hilal of the University of Wisconsin developed a model for AC losses in HTSC wire, including eddy current and hysteresis losses. Keywords: Electric motors; Composite materials; Ceramics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 28, 1989
- Accession Number
- ADA208598
Entities
People
- John W. Halloran