Investigation of the forces developed when using high-temperature superconductors with linear electric machines
Date
2008-04-30T13:58:40Z
Authors
Poeti, Leonardo
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Abstract
Abstract
The proposed research of investigating the interaction between high-temperature
superconductors and linear motors is introduced. Background on levitated
transportation, high-temperature superconductor applications and supercon-
ductor theory is given. An analytical model is developed for calculating
thrust and levitation forces produced by 3-phase windings on a pair bulk high-
temperature superconductors. Results produced by this model for a spacing
of 1 pole-pitch and 1
2 pole-pitch are presented. In order to verify the analytical
model a prototype system is built from a linear motor primary and vehicles
containing 2 rows of superconductors. Two vehicles are built with different
spacing between the rows of superconductors in order to investigate the ef-
fect of their positioning, with respect to the pole-pitch, on the thrust forces
produced. Measured forces on these two vehicles are then compared with pre-
dicted values showing that the model predicts the forces with less than 5%
error. Problems with the analytical model are also discussed. Finally it is con-
cluded that the model developed provides insight to the relationship between
high-temperature superconductors and travelling magnetic waves, and that a
1 pole-pitch separation between superconductors produces higher forces. Rec-
ommendations for further development of the prototype system are also given.
Description
Keywords
high-temperature superconductors, linear electric machines