Abstract
Sub-sonic linear synchronous motors (LSMs) with high-temperature superconducting (HTS) magnets, which aim to accelerate to a velocity of 1200 km/h in the near-vacuum tubes of 0.001 atm for the Hyperloop, are newly introduced in this paper. By the virtue of the combination of LSMs and electrodynamic suspensions (EDSs) with HTS magnets, a large air-gap of 24 cm, low magnetic resistance forces of below 2 kN, and the efficient as well as practical design of propulsion power supply systems of around 10 MVA could be guaranteed at a sub-sonic velocity. The characteristics of the proposed LSMs with HTS magnets, in addition, are widely analyzed with theories and simulation results. Optimal design methods for LSMs and inverters, which account for more than half of the total construction cost, are introduced with design guidelines and examples for the commercialization version of the Hyperloop. At the end of the paper, in order to verify the proposed design models of the sub-sonic LSMs, two different test-beds—i.e., 6 m long static and 20 m long dynamic propulsion test-beds—are fabricated, and it is found that the experimental results are well matched with proposed design models as well as simulation results; therefore, the design methods constitute guidelines for the design of sub-sonic LSMs for the Hyperloop.
Highlights
The Hyperloop, which aims to accelerate to the sub-sonic velocity of 1200 km/h in near-vacuum tubes of 0.001 atm with magnetic levitation and propulsion systems, is an attractive candidate for the next-generation transportation [1,2]
After the alpha-paper on the Hyperloop [10] made by Space X was widely released in 2013, the Hyperloop has been suddenly in the public eye for the last several years as an alternative to replace Maglevs; similar concepts to the Hyperloop had already been introduced by Swissmetro, Switzerland since the 1990s [11] and developed in the Korea Railroad Research Institute (KRRI), South Korea since
The characteristics of the proposed sub-sonic linear synchronous motors (LSMs) are introduced from scratch, and we suggest design guidelines with a design example for the commercialization version of the Hyperloop
Summary
The Hyperloop, which aims to accelerate to the sub-sonic velocity of 1200 km/h in near-vacuum tubes of 0.001 atm with magnetic levitation and propulsion systems, is an attractive candidate for the next-generation transportation [1,2]. One [14] and Hyperloop Transportation Technologies [15], which have performed partial operating tests [16,17] Many of these companies, at the same time, have adopted linear induction motors (LIMs) with electrodynamic suspension (EDS) using on-board permanent magnets for propulsion, guidance and levitation. Who have adopted LSMs with high-temperature superconducting (HTS) magnets for high-speed transportation; most of them could not suggest general design guidelines covering magnetic propulsion systems They only conducted design and feasibility studies based on finite element method (FEM) simulations without any static and dynamic experiments due to the complex system configuration and cost issues.
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