Study of a Null-Flux Coil Electrodynamic Suspension Structure for Evacuated Tube Transportation

Guo, Zhaoyu; Li, Jie; Zhou, Danfeng

doi:10.3390/sym11101239

Cited by 31 publications

(5 citation statements)

References 21 publications

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“…The FEM is a numerical tool for solving Maxwell's equations, considering electromagnetic fields with specified boundary conditions and design geometries [34,35]. However, the method becomes computationally intensive when dealing with systems involving relative movements and temporal and spatial dependencies, due to the dynamic meshing required at each simulation step, particularly in 3D analyses.…”

Section: Comparative Analysis Of Related Studiesmentioning

confidence: 99%

Electrical Circuits Simulator in Null-Flux Electrodynamic Suspension Analysis

Franca

Zhu

et al. 2023

Applied Sciences

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This paper employed an electrical circuit simulator to investigate an electrodynamic suspension system (EDS) for passenger rail transport applications. Focusing on a null-flux suspension system utilizing figure-eight-shaped coils (8-shaped coils), the aim was to characterize the three primary electromagnetic forces generated in an EDS and to compare the findings with existing literature. The dynamic circuit theory (DCT) approach was utilized to model the system as an electrical circuit with lumped parameters, and mutual inductance values between the superconducting (SC) coil and the upper and lower loops of the 8-shaped coil were calculated and inputted into the simulator. The results were compared with experimental data obtained from the Yamanashi test track. The comparison demonstrated close alignment between the theoretical expectations and the obtained experimental curves, validating the accuracy of the proposed model. The study highlights the advantages of this new approach, including faster computation times and efficient implementation of modifications. Overall, this work contributes to the ongoing development and optimization of null-flux suspension Maglev systems.

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Section: Comparative Analysis Of Related Studiesmentioning

confidence: 99%

Electrical Circuits Simulator in Null-Flux Electrodynamic Suspension Analysis

Franca

Zhu

et al. 2023

Applied Sciences

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“…With the change of the spatial B (SCM) , b i can be represented as in Equation ( 2) using the mutual inductance M i = Φ i /I (SCM) [16,18], where Φ i is the magnetic flux of the SCM in the i-th levitation coil. When the levitation coil moves at a velocity of −v, b i can be calculated as a line integral along the winding of the coil [26], as shown in Equation (3), where e (d) denotes the unit directional vector for the directions d = x, y, or z.…”

Section: Basic Principles Of Null-flux Eds For the Hyperloopmentioning

confidence: 99%

“…The null-flux EDS with SCM system has been mainly investigated when it comes to its design characteristics and experimental analysis based on null-flux levitation/guidance device models invented in the 1960s and 1970s [11,12], followed by unified propulsion/levitation/guidance device models [13,14]. Although numerical analysis methods, such as the 3D finite element method (FEM), are accurate for analyzing null-flux EDS devices, using such methods is often limited to the performance review of a specific design [15] or the validation of a developed model [16] due to their complex 3D shapes and configurations. Therefore, in order to improve the computational efficiency of levitation devices with null-flux electric circuits, the dynamic circuitry theory, which analyzes the levitation coil as a rectangular shape using the Fourier series, has been developed and widely utilized [17,18].…”

Section: Introductionmentioning

confidence: 99%

Design Model of Null-Flux Coil Electrodynamic Suspension for the Hyperloop

Lim

Lee

et al. 2020

Energies

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The Hyperloop has been developed using various technologies to reach a maximum speed of 1200 km/h. Such technologies include magnetic levitation technologies that are suitable for subsonic driving. In the Hyperloop, the null-flux electrodynamic suspension (EDS) system and superconducting magnets (SCMs) can perform stable levitation without control during high-speed driving. Although an EDS device can be accurately analyzed using numerical analysis methods, such as the 3D finite element method (FEM) or dynamic circuitry theory, its 3D configurations make it difficult to use in various design analyses. This paper presents a new design model that fast analyzes and compares many designs of null-flux EDS devices for the Hyperloop system. For a fast and effective evaluation of various levitation coil shapes and arrangements, the computational process of the induced electromotive force and the coupling effect were simplified using a 2D rectangular coil loop, and the induced current and force equations were written as closed-form solutions using the Fourier analysis. Also, levitation coils were designed, and their characteristics were analyzed and compared with each other. To validate the proposed model, the analyzed force responses for various driving conditions and the changed performance trend by design variables were compared with analyzed FEM results.

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“…Guo et al 2019 [55] Study of a null-flux coil electrodynamic suspension structure for evacuated tube transportation.…”

Section: Computational (Fem)mentioning

confidence: 99%

A Triple-Helix Approach for the Assessment of Hyperloop Potential in Europe

Gkoumas

Christou

2020

Sustainability

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Hyperloop is a proposed high-speed surface mode of passenger and freight transport that has gained much visibility in recent years. Since its introduction in modern form in 2013, progress on Hyperloop has been thriving, with several companies involved in research and development of Hyperloop systems and subsystems. Some of them have planned testing tracks in Europe, anticipating what could be the start of commercial routes. Nevertheless, there are concerns that need to be addressed regarding the safety and serviceability performance, and further steps are necessary for the standardization and certification of the system. This study leverages the state of play of Hyperloop development, identifies issues and challenges from a European perspective, and provides policy insights towards testing and commercialization. To this end, it follows a two-tier approach that (i) addresses safety concerns related to the implementation of Hyperloop as a key enabler of the proposed technology and (ii) analyses Hyperloop technology developments using a triple-helix innovation approach, using a structured methodology based on consolidated data sources (i.e., the Scopus database of peer-reviewed literature and the Patstat patent database). The performed analyses highlight the significant amount of research and patent activity on several aspects of Hyperloop, while the mapping of activities carried out by industry in Europe, as well as from European Services, highlights the progress made towards the future Hyperloop implementation in Europe. Altogether, these findings provide factual information regarding the necessary research, policy, and industry steps taken so far that can help bring Hyperloop into the market. To the authors’ knowledge this represents a very systematic and extensive literature review on Hyperloop’s scientific and technological developments.

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Study of a Null-Flux Coil Electrodynamic Suspension Structure for Evacuated Tube Transportation

Cited by 31 publications

References 21 publications

Electrical Circuits Simulator in Null-Flux Electrodynamic Suspension Analysis

Electrical Circuits Simulator in Null-Flux Electrodynamic Suspension Analysis

Design Model of Null-Flux Coil Electrodynamic Suspension for the Hyperloop

A Triple-Helix Approach for the Assessment of Hyperloop Potential in Europe

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