Influence of the lateral movement on the levitation and guidance force in the high-temperature superconductor maglev system

Song, Honghai; Haas, O. de; Beyer, C. J.; Krabbes, G.; Verges, P.; Schultz, L.

doi:10.1063/1.1923190

Cited by 55 publications

(29 citation statements)

References 11 publications

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“…During the measurements, the WH of the vehicle model was decreased because of the decay of the levitation force due to lateral movement [13,14], and this decay increased further with the increase of the d MLD [13] and the decrease of the WH [14]. In addition, our former investigations have shown that the vertical f RF of the vehicle model was increased as the WH was decreased [15].…”

Section: Resultsmentioning

confidence: 87%

Lateral restorable characteristics of the high-Tc superconducting maglev vehicle above the permanent magnet guideway

Wang

Lin

et al. 2009

Physica C: Superconductivity

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Section: Resultsmentioning

confidence: 87%

Lateral restorable characteristics of the high-Tc superconducting maglev vehicle above the permanent magnet guideway

Wang

Lin

et al. 2009

Physica C: Superconductivity

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“…An important related movement-direction effect was reported by Song et al 9 They experimentally found that during the cycling lateral movement for a SC in a maglev system, the levitation force continuously decreases and the rate of the decrease is gradually reduced, whereas the guidance force hysteresis curve does not change after the first cycle. After that, a large number of theoretical and numerical works have studied the changes in levitation and guidance forces when the SC moves vertically or laterally above the guideway.…”

Section: Introductionmentioning

confidence: 95%

Influence of movement direction on levitation performance and energy dissipation in a superconducting maglev system

2017

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During the regular operation of a maglev system, the superconducting levitation body may move away from the working position due to the external disturbance and the curved part of the guideway. Based on the A − V formulation of magnetoquasistatic Maxwell’s equations, in this paper, a two-dimensional numerical model is applied to study the influence of movement direction on a typical maglev system consisting of an infinitely long high-temperature superconductor and a guideway of two infinitely long parallel permanent magnets with opposite horizontal magnetization. After the highly nonlinear current-voltage characteristic of the superconductor is taken into account, the levitation performance change and the energy dissipation induced by the relative movement of the superconductor and the guideway are discussed. The results show that the levitation force, guidance force and power loss are strongly dependent on the movement direction and speed of the superconductor when it moves away from the working position. If the superconductor moves periodically through the working position, these three physical quantities will change periodically with time. Interestingly, the power loss drastically increases during the first cycle, and after the first cycle it starts to decrease and finally tends to a dynamic steady state. Moreover, an increase in the tilt angle of movement direction will improve the maximum levitation force and, simultaneously, enhance the energy dissipation of the maglev system.

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“…The maximum speed of high-temperature superconducting Maglev is deemed to reach over 600 km/h [1], so the Maglev will displace from the center line of the permanent magnetic guideway (PMG). Other reasons, such as the thrust of wind, will lead to lateral movement and lateral movement results in the levitation force (LF) decay [2]. But change of GF above PMG during lateral movements has not been researched widely.…”

Section: Introductionmentioning

confidence: 99%

“…Del-Valle et al [5][6][7] theoretically analyzed the levitation force of a system consisting of an infinitely long superconductor over an infinitely long PMG using a realistic model, and gave the physical keys for reduction of the levitation force after lateral movement. Song et al [2] studied the levitation capability of the HTS Maglev above PMG during the lateral movements and found that LF reduces but GF keeps constant. Ma et al [8] pointed out that the pre-load method is very applicable to suppress LF decay of the bulk HTS, and this effect can be ascribed to the reduction of the hysteretic loss in the bulk HTS, i.e.…”

Section: Introductionmentioning

confidence: 99%

Characteristic of the Guidance Force in the High-T c Superconducting Levitation System with Pre-Load Process

Lin

Deng

et al. 2009

J Supercond Nov Magn

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The stable levitation above permanent magnet is an important characteristic of the bulk high-T c superconductor (HTS). When an external force pushes the bulk HTS up, down or sideways, or tries to tilt it, a restoring force can return it to its initial position. The HTS Maglev relied on this characteristic can overcome the external force from wind or pass the curve lines successfully. The change of guidance force (GF) during many times lateral movement is studied. Experiments show that GF increases during the lateral movement, no matter what kind of PMG or HTS is used, and the change of the GF slows down after 5 times lateral movement. The pre-load method can reduce the levitation force decay during lateral movement. So the influence of GF by the pre-load method is needed to be studied. It is found that the pre-load method can increase GF and reduce the change of the GF during lateral movement. The Halbach permanent magnetic guideway (PMG) can offer much more GF but the change is larger just as the levitation force decays. The GF of cylindrical bulk HTS increases more than of the rectangular bulk HTS in the pre-load case. The characteristics of the GF during the lateral movement are explained. These results are important for further HTS Maglev vehicle system designs.

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Influence of the lateral movement on the levitation and guidance force in the high-temperature superconductor maglev system

Cited by 55 publications

References 11 publications

Lateral restorable characteristics of the high-Tc superconducting maglev vehicle above the permanent magnet guideway

Lateral restorable characteristics of the high-Tc superconducting maglev vehicle above the permanent magnet guideway

Influence of movement direction on levitation performance and energy dissipation in a superconducting maglev system

Characteristic of the Guidance Force in the High-T c Superconducting Levitation System with Pre-Load Process

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