MPZ stability under time-dependent, spatially varying heat loads

Author

Scholle, E.A. ; Schwartz, J.

Author_Institution

Illinois Univ., Urbana, IL, USA

Volume

3

Issue

1

fYear

1993

fDate

3/1/1993 12:00:00 AM

Firstpage

421

Lastpage

424

Abstract

Although the on-board superconducting magnets (SCMs) are a relatively small fraction of the cost and weight of magnetic levitation systems their performance is critical to the success of the entire system. The velocity of the MLU 002 vehicle in Japan had been limited by quenching of the SCMs due to track induced vibrations at high speed. Superconductor stability is discussed assuming time-dependent spatially varying heat loads. The one-dimensional minimum-propagating zone (MPZ) model has been extended to include time-dependent disturbances. The MPZ has been determined as a function of the disturbance frequency, amplitude, and length. The spatial variation of the initial disturbance is modeled as a sinusoidal function. Results for the MLU 002 and cable-in-conduit conductors are compared.<>

Keywords

magnetic levitation; railways; superconducting magnets; MLU 002 vehicle; MPZ stability; cable-in-conduit conductors; magnetic levitation systems; on-board superconducting magnets; one-dimensional minimum-propagating zone; sinusoidal function; spatially varying heat loads; time-dependent disturbances; Conductive films; Cooling; Frequency; Magnetic levitation; Stability; Superconducting coils; Superconducting films; Superconducting magnets; Thermal conductivity; Vehicles;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.233733

Filename

233733