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Title: Superconducting Maglev and LSM development in Canada

Abstract

Studies on the use of superconducting magnets for levitation, synchronous propulsion, and guidance of high speed intercity ground transportation in Canada are reported. For a 100 passenger vehicle weighing 300 kN, a levitation height of 22 cm at 480 Km/hr is obtained by the interaction of eight 3.85 x 10$sup 5$ amp turn 100 x 30 cm magnets with eddy currents induced in two 80 x 1 cm aluminum guideway strips. In low speed sections, aluminum thickness is graded to 3 cm to maintain total drag (aerodynamic and magnetic) almost speed independent. The variable speed LSM uses fifty 5 x 10$sup 5$ amp turn 40 x 150 cm magnets on a half pitch of 45 cms. The motor, with split 3- phase guideway windings energized in 5 Km block lengths, has 72 percent efficiency and a 0.82 power factor. A favored guidance scheme for a flat-topped elevated guideway (minimizing snow accumulation) uses the interactions of the propulsion magnets with flat null-flux loops overlying the LSM windings and with the edges of the levitation strips. This scheme produces a lateral stiffness of 10$sup 6$ N/m and a maximum guidance force equal to vehicle weight. The Canadian test facility, presently being commissioned,more » uses full scale magnets and a 7.6 m diameter wheel rotated about a vertical axis with a maximum peripheral speed of 100 Km/hr. (auth)« less

Authors:
;
Publication Date:
Research Org.:
Queen's Univ., Kingston, Ont.
OSTI Identifier:
4094789
NSA Number:
NSA-33-017066
Resource Type:
Conference
Journal Name:
IEEE Trans. Magn., v. MAG-11, no. 2, pp. 627-632
Additional Journal Information:
Conference: Applied superconductivity conference, Oakbrook, Illinois, USA, 30 Sep 1974; Other Information: See CONF-740957--. Orig. Receipt Date: 30-JUN-76
Country of Publication:
United States
Language:
English
Subject:
N42220* -Engineering-Facilities & Equipment-Cryogenic & Superconducting Equipment & Devices; 330300* -Advanced Automotive Propulsion Systems-Electric- Powered Systems; *LEVITATED TRAINS- SUPERCONDUCTING MAGNETS; *SUPERCONDUCTING MAGNETS- - USES; CANADA; CONTROL SYSTEMS; DRAG; EDDY CURRENTS; ELECTRONIC GUIDANCE; PROPULSION; TEST FACILITIES

Citation Formats

Atherton, D L, and Eastham, A R. Superconducting Maglev and LSM development in Canada. United States: N. p., 1975. Web.
Atherton, D L, & Eastham, A R. Superconducting Maglev and LSM development in Canada. United States.
Atherton, D L, and Eastham, A R. Sat . "Superconducting Maglev and LSM development in Canada". United States.
@article{osti_4094789,
title = {Superconducting Maglev and LSM development in Canada},
author = {Atherton, D L and Eastham, A R},
abstractNote = {Studies on the use of superconducting magnets for levitation, synchronous propulsion, and guidance of high speed intercity ground transportation in Canada are reported. For a 100 passenger vehicle weighing 300 kN, a levitation height of 22 cm at 480 Km/hr is obtained by the interaction of eight 3.85 x 10$sup 5$ amp turn 100 x 30 cm magnets with eddy currents induced in two 80 x 1 cm aluminum guideway strips. In low speed sections, aluminum thickness is graded to 3 cm to maintain total drag (aerodynamic and magnetic) almost speed independent. The variable speed LSM uses fifty 5 x 10$sup 5$ amp turn 40 x 150 cm magnets on a half pitch of 45 cms. The motor, with split 3- phase guideway windings energized in 5 Km block lengths, has 72 percent efficiency and a 0.82 power factor. A favored guidance scheme for a flat-topped elevated guideway (minimizing snow accumulation) uses the interactions of the propulsion magnets with flat null-flux loops overlying the LSM windings and with the edges of the levitation strips. This scheme produces a lateral stiffness of 10$sup 6$ N/m and a maximum guidance force equal to vehicle weight. The Canadian test facility, presently being commissioned, uses full scale magnets and a 7.6 m diameter wheel rotated about a vertical axis with a maximum peripheral speed of 100 Km/hr. (auth)},
doi = {},
journal = {IEEE Trans. Magn., v. MAG-11, no. 2, pp. 627-632},
number = ,
volume = ,
place = {United States},
year = {1975},
month = {3}
}

Conference:
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