MagLev-Cobra Operational Tests

Mattos, Laercio Simas; Rodríguez, E.; Costa, Fábio Moraes da; Sotelo, Guilherme Gonçalves; Andrade, R. de; Stephan, R.M.

doi:10.1109/tasc.2016.2524473

Cited by 77 publications

(21 citation statements)

References 14 publications

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“…Therefore, maglev vehicles may vibrate violently because of the irregular disturbance. These vibrations had been detected in the experiments of D’Ovidio and Carpenito (2014), Deng et al, (2017), and Mattos et al (2016). In many cases, the vibrations could strongly affect the running safety and riding comfort.…”

Section: Introductionmentioning

confidence: 95%

Theoretical optimization and experimental verification of a non-contact damper for high temperature superconducting Maglev systems

Deng

Huang

et al. 2022

Journal of Vibration and Control

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High-temperature superconducting (HTS) maglev has excellent potential in high-speed transportation due to its capability of passive stabilization levitation. However, in applications, the vibration of maglev vehicle with a large amplitude will be triggered for some external incentives or interference owing to its weak damping characteristics. Hence, it is preferable and necessary to find a way to reduce the vibration without mechanical contact. In terms of mechanical structure, the HTS maglev system mainly consists of HTS bulks and permanent magnets guideway (PMG). Utilizing the magnetic field provided by PMG, we designed and assessed an electromagnetic shunt damper (EMSD) for the HTS maglev system, by which the vibrations can be attenuated without contact. At first, the parameters of EMSD were theoretically optimized, respectively. Second, according to the structure of the Halbach PMG, the experimental EMSD was presented. In this damper, two groups of coils in reverse series were set above the two magnetic poles of the PMG to get a large induced electromotive force. Eventually, the experimental results show that the vibrations of the HTS maglev model vehicle can be attenuated more than 80% in the resonance region when the designed EMSD was employed in the system. Namely, this non-contacting damper will highly enhance the dynamic characteristics of HTS maglev systems.

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Section: Introductionmentioning

confidence: 95%

Theoretical optimization and experimental verification of a non-contact damper for high temperature superconducting Maglev systems

Deng

Huang

et al. 2022

Journal of Vibration and Control

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“…The most promising applications of this technology are the autostabilized high-velocity rotating magnetic bearings with no mechanical contacts [1][2][3][4] on the one hand, and magnetic levitating (MAGLEV) trains on the other hand [5][6][7][8][9][10]. The first MAGLEV train has been running on a demonstration track at the Federal University of Rio de Janeiro in 2014 [11] (see Figure 1). Recently, a MAGLEV train prototype designed for running at 620 km/h was demonstrated in China [12].…”

Section: Introductionmentioning

confidence: 99%

Calculation of the Forces Applied to a Superconductor in Levitation in an Inhomogeneous Magnetic Field

Bernstein¹,

Xing²,

Noudem³

2022

RPM

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Stable levitation of systems consisting of a magnetic source and a superconductor is actively investigated due to the promising applications of this technology. While huge efforts have been made for modeling these setups with numerical simulations, analytical models, in spite of their use being limited to devices with a high degree of symmetry, can bring precious information on certain characteristics of levitating systems. Summarizing our previous work in the field, we present the mean-field model that we have proposed to reproduce the interactions between a magnetic source and a superconductor. We show that the model provides an estimation of the surface critical current density of the shielding currents flowing in the superconductor and an estimation of the thickness, t, of the layer carrying the currents. We emphasize that the calculated values of t are an increasing function of temperature, which tend toward the Meissner limit at low temperatures. Finally, we determine the condition that ensures stable levitation of axisymmetric systems.

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“…The first man-loading HTS maglev was shown in 2000 [6]. Since then, different configurations of HTS maglev have been proposed in Russia [7], Japan [8], Germany [9], Italy [10], China [11], and Brazil [12]. In 2005, a full-size HTS maglev was run in the Yamanashi Maglev Test Line, and it achieved a top speed of 553 km/h [13].…”

Section: Introductionmentioning

confidence: 99%

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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MagLev-Cobra Operational Tests

Cited by 77 publications

References 14 publications

Theoretical optimization and experimental verification of a non-contact damper for high temperature superconducting Maglev systems

Theoretical optimization and experimental verification of a non-contact damper for high temperature superconducting Maglev systems

Calculation of the Forces Applied to a Superconductor in Levitation in an Inhomogeneous Magnetic Field

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

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