Semianalytical Calculation of Superconducting Electrodynamic Suspension Train Using Figure-Eight-Shaped Ground Coil

Cai, Yao; Ma, Guangtong; Wang, Yiyu; Gong, Tianyong; Liu, Kang; Yao, Chunxing; Yang, Wenjiao; Zeng, Jingsong

doi:10.1109/tasc.2020.2978423

Cited by 43 publications

(11 citation statements)

References 16 publications

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“…Figure 2 shows the working principle of the superconducting EDS of the HTS maglev, HTS magnet, 8-shape coil, and equivalent circuit. When an HTS coil passes through the 8-shape coil in the x-direction, according to Faraday's law, the electromagnetic induction can be calculated as [19]:…”

Section: Superconducting Electrodynamic Suspension (Eds) Using the Ht...mentioning

confidence: 99%

“…vx is the moving velocity of the HTS magnet. If the HTS magnets interact with an array of 8-shape coils simultaneously, one can derive: When an HTS coil passes through the 8-shape coil in the x-direction, according to Faraday's law, the electromagnetic induction can be calculated as [19]:…”

Section: Superconducting Electrodynamic Suspension (Eds) Using the Ht...mentioning

confidence: 99%

“…It can be found that at the beginning, the levitation force fast increases with the increasing speed, but then the levitation force slowly increases and is saturated after reaching a certain speed. The reason is that although the induced voltage in the 8-shapecoil goes up with the increasing speed, the overall impedance of the coil also rises due to the frequency and skin effect [19].…”

Section: Superconducting Electrodynamic Suspension (Eds) Using the Ht...mentioning

confidence: 99%

See 2 more Smart Citations

Fundamental Design and Modelling of the Superconducting Magnet for the High-Speed Maglev: Mechanics, Electromagnetics, and Loss Analysis during Instability

Jin

Shen

et al. 2022

Machines

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The high-temperature superconductor (HTS) has been recognised as one of the most up-and-coming materials thanks to its superior electromagnetic performance (e.g., zero resistance). For a high-speed maglev, the HTS magnet can be the most crucial component because it is in charge of both the levitation and the propulsion of the maglev. Therefore, a fundamental study of HTS magnets for maglev is crucial. This article presents the fundamental design and modelling of the superconducting magnet for a high-speed maglev, including mechanics, electromagnetics, and loss analysis during instability. First, the measurements of the superconducting wire were performed. The HTS magnet was primarily designed and modelled to fulfil the basic electromagnetic requirements (e.g., magnetic field) in order to drive the maglev at a high speed. The modelling was verified by experimental tests on a scale-down HTS magnet. A more professional model using the H-formulation based on the finite element method (FEM) was built to further investigate some deeper physical phenomenon of the HTS magnet (e.g., current density and loss behaviours), particularly in situations where the high-speed maglev is in the normal steady state or encountering instability.

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Section: Superconducting Electrodynamic Suspension (Eds) Using the Ht...mentioning

confidence: 99%

Section: Superconducting Electrodynamic Suspension (Eds) Using the Ht...mentioning

confidence: 99%

Section: Superconducting Electrodynamic Suspension (Eds) Using the Ht...mentioning

confidence: 99%

See 1 more Smart Citation

Fundamental Design and Modelling of the Superconducting Magnet for the High-Speed Maglev: Mechanics, Electromagnetics, and Loss Analysis during Instability

Jin

Shen

et al. 2022

Machines

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“…However, computational loads arise from mutual inductance, which is a representation of the magnetic coupling between levitation coils and moving SCMs. For a rapid analysis using simplified system models, as achieved in previous studies, only the mutual inductance between electrically connected coils is considered, while the magnetic coupling effect due to adjacent coils is neglected 30 – 32 . In certain cases, only the fundamental waves of SCMs are considered for analysis.…”

Section: Introductionmentioning

confidence: 99%

Equivalent inductance model for the design analysis of electrodynamic suspension coils for hyperloop

Lim

Lee

et al. 2021

Sci Rep

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Hyperloop is a new concept of ground transportation. In Hyperloop, travelling occurs in near-vacuum tubes under 0.001 atm at a subsonic speed of up to 1200 km/h. During acceleration to and driving at a subsonic speed, magnetic levitation is employed. Thus far, various levitation technologies in existing high-speed maglev trains have been considered. Among those technologies, superconducting (SC) electrodynamic suspension (EDS) is a highly effective levitation system for Hyperloop owing to its advantages of a large levitation gap, levitation stability, and control being unnecessary. However, analyzing an EDS system requires the electromagnetic transient analysis of complex three-dimensional (3D) features, and its computational load generally limits the use of numerical methods, such as the 3D finite element method (FEM) or dynamic circuit theory. In this study, a novel model that can rapidly and accurately calculate the frequency-dependent equivalent inductance was developed. The developed model was then applied to design an EDS system using the decoupled resistance-inductance equations of levitation coils. Next, levitation coils of SC-EDS were designed and analyzed for use in Hyperloop. The obtained results were compared with the FEM results to validate the developed model. In addition, the model was experimentally validated by measuring currents induced by moving pods.

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“…However, there are computational loads incurred by the handling of mutual inductance, which is a representation of the magnetic coupling between levitation coils and moving SCMs. For rapid analysis using simplified system models, as achieved in previous studies, only the mutual inductance between electrically connected coils is considered while ignoring the magnetic coupling effect due to adjacent coils [30][31][32]. In certain cases, only the fundamental waves of the SCM are considered for analysis.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Inductance Model for the Design Analysis of Electrodynamic Suspension Coils for the Hyperloop

Lim

Lee

et al. 2021

Preprint

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Hyperloop allows for improved transportation efficiency at higher speeds and a lower power consumption. Various magnetic levitation technologies in existing high-speed maglev trains are being considered to overcome speed limitations for the development of Hyperloop, which are driven inside vacuum tubes at 1,200 km/h; and superconducting (SC) electrodynamic suspension (EDS) can provide numerous advantages to Hyperloop. such as enabling stable levitation in high-speed driving without control, and increasing the levitation air gap. However, the analysis of the EDS system requires the electromagnetic transient analysis of complex three-dimensional (3D) features, and its computational load generally limits the use of numerical methods, such as the 3D finite element method (FEM) or dynamic circuit theory; This paper presents a novel model that can rapidly and accurately calculate the frequency-dependent equivalent inductance; and it can model the EDS system with the decoupled resistance-inductance (RL) equations of levitation coils. As a design example, the levitation coils of the SC-EDS were designed and analyzed for the Hyperloop, and the results were compared with those of the FEM results to validate the model. In addition, the model was experimentally validated by measuring currents induced by moving pods.

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Semianalytical Calculation of Superconducting Electrodynamic Suspension Train Using Figure-Eight-Shaped Ground Coil

Cited by 43 publications

References 16 publications

Fundamental Design and Modelling of the Superconducting Magnet for the High-Speed Maglev: Mechanics, Electromagnetics, and Loss Analysis during Instability

Fundamental Design and Modelling of the Superconducting Magnet for the High-Speed Maglev: Mechanics, Electromagnetics, and Loss Analysis during Instability

Equivalent inductance model for the design analysis of electrodynamic suspension coils for hyperloop

Equivalent Inductance Model for the Design Analysis of Electrodynamic Suspension Coils for the Hyperloop

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