Novel cryogen-free actively shielded superconducting magnets for maglev vehicles. Final report, August 1991-June 1992

Technical Report · Mon Jun 01 00:00:00 EDT 1992

OSTI ID:5714529

Vermilyea, M E

The report presents the results of a research effort into the design of a shielded superconducting magnet system for a maglev vehicle. The magnet design is based on a novel cryogen-free technology which allows operation without the use of any cryogenic fluids. This is accomplished by the use of a two-stage Gifford-McMahon (G-M) cryogenic refrigerator to provide cooling of the coil and a single cryostat thermal radiation shield by conduction. The design operating temperature of the magnet is 7.5 K, and that of the shield is 43 K. The magnet is wound with a tape form of niobium tin superconductor which allows operation at a module current density of 8100 A/sq cm at a flux density of 3.4 T at the 7.5 K temperature with a margin of 4.5 K to critical temperature. The magnet design is coupled with a linear synchronous motor and null-flux sidewall levitation system to provide a workable maglev system design. Costs for several components of the design, including coils and cryostat, shielding, and power conditioning apparatus are estimated.

• Research Organization: General Electric Co., Schenectady, NY (United States)
• OSTI ID: 5714529
• Report Number(s): PB-93-154771/XAB; CNN: DTFR53-91-C-00079
• Resource Relation: Other Information: Color illustrations reproduced in black and white
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
33 ADVANCED PROPULSION SYSTEMS
LEVITATED TRAINS
SUPERCONDUCTING MAGNETS
DESIGN
COST ESTIMATION
CRYOGENIC FLUIDS
CRYOSTATS
LEVITATION
NIOBIUM ALLOYS
PLANNING
TEMPERATURE DEPENDENCE
THERMAL INSULATION
TIN ALLOYS
ALLOYS
CONTROL EQUIPMENT
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
EQUIPMENT
FLUIDS
MAGNETS
SUPERCONDUCTING DEVICES
THERMOSTATS
TRAINS
VEHICLES
665412* - Superconducting Devices- (1992-)
661210 - Cryogenics- (1992-)
330000 - Advanced Propulsion Systems