The Effect of Magnetic Field Distribution and Pole Array on the Vertical Levitation Force Properties of HTS Maglev Systems

Öztürk, K.; Abdioglu, M.; Sahin, Ercin; Çelık, Şükrü; Gedikli, Hasan; Savaskan, Burcu

doi:10.1109/tasc.2015.2417679

Cited by 31 publications

(7 citation statements)

References 24 publications

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“…To date there has been considerable research on the performance of HTS-PM maglev system. The magnetic field distribution generated by different PM arrangements has been investigated [4][5][6][7] and the levitation force and guidance force of an HTS bulk over a PM have been studied to evaluate the HTS-PM levitation performance [8][9][10][11][12][13][14]. Moreover, the dynamic properties of an HTS bulk over a PM has been investigated by experiments and simulations [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of a YBCO Bulk Above an Electromagnet Guideway

Zhao

Ainslie

et al. 2021

IEEE Trans. Appl. Supercond.

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For high-temperature superconducting (HTS) maglev, an electromagnet guideway unit (EMGU) that can form an electromagnet guideway (EMG) with a small gap, or even no gap, between EMGUs has been designed. The longitudinal magnetic fields along a single EMGU and two EMGUs arranged in a line were first investigated through measurement and simulation. The experimentally measured data validated the simulation results from a three-dimensional (3D) EMGU model implemented in COMSOL Multiphysics, indicating that the model is reliable and can be used for further studies. The dynamic responses of a high-temperature superconducting (HTS) bulk above a single EMGU and two EMGUs arranged in a line, including the dynamic levitation force (LF) and traveling directional force (TDF), under different operating conditions were investigated through experiment and simulation using a segregated Hformulation model. The magnetic field and current density distributions inside the superconductor are affected by the external magnetic field generated by the EMGU and are responsible for the dynamic characteristics. Finally, the segmented instant excitation (SIE) mode was investigated through simulation, which shows it is feasible by coordinating the currents of EMGUs.

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Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of a YBCO Bulk Above an Electromagnet Guideway

Zhao

Ainslie

et al. 2021

IEEE Trans. Appl. Supercond.

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“…Since the discovery of high-temperature superconductors (HTS) in 1986, 1 there has been a considerable interest worldwide in the development of HTSs for practical applications. Bulk RE-Ba-Cu-O (RE means rare earth element) superconductors have significant potential for use in magnetically levitated transportation (Maglev) [2][3][4][5][6][7][8] and magnetic bearing systems. 9,10 For increasing the usage potential of fabricated HTSs, the magnetic force and trapped field properties of these samples should be increased.…”

Section: Introductionmentioning

confidence: 99%

Magnetic levitation force and trapped field properties of multiseeded YBCO with triangular arrangement of seeds

Abdioglu

Güner

Öztürk

et al. 2021

Int J Applied Ceramic Tech

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Although there are studies in literature using different number of seeds with different arrangements, especially line and rectangular, it is seen that there is no detailed study handling the levitation force together with trapped field properties of triangular arrangement of seed in YBCO. Therefore, to further investigate the magnetic properties of seeded YBCO superconductors, we have fabricated cylindrical YBCO (YBa2Cu3O7) superconductors with triangular arrangement of the seeds with different seed distances. Maximum levitation force values were obtained as 39.4 N and 57.1 N, while the maximum guidance force values were obtained as −4.6 N, and −8.7 N, respectively, with single‐seeded and triangular‐seeded samples with seed distance of 14 mm. It was determined that the trapped field, levitation force, and guidance force firstly decreased from the single‐seeded sample to the triangular‐seeded sample with small seed distance and then increased with increasing seed distance. Increased field trapping and levitation force performances in the triangular‐seeded samples with suitable seed distance indicate that the triangular arrangement of seeds is an eligible method to produce larger dimension YBCO samples with bigger shielding current radius and bigger averaged trapped field values.

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“…PMG has many advantages, such as small size [16], easy to assemble [17], reasonably high magnetic field [18], etc However, a number of disadvantages accompany with PMG. For instance, the change of magnetic field strength can only be realized by applying permanent magnets with different surface magnetic flux density or different arrangement [19]. It means that once the guideway is built, the field strength and distribution cannot vary.…”

Section: Introductionmentioning

confidence: 99%

Comparative study between electromagnet and permanent magnet rails for HTS maglev

Wen¹,

Xin²,

Hong³

et al. 2020

Supercond. Sci. Technol.

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In this study, we investigated the magnetic levitation characteristics of a high-temperature superconducting (HTS) bulk with both permanent magnet guideway (PMG) and electromagnet guideway (EMG). Trying to have the magnetic fields of the two kinds of guideways with a similar structure, then the central magnetic flux density B z and unit magnetomotive F u were selected as the evaluation indexes respectively for the comparative study. Different magnetic field characteristics on magnetic levitation performance were studied, such as the gradient of magnetic flux density and magnetic flux density component in different directions. Several experiments were carried out at different magnetic field conditions by changing the exciting current of EMG or replacing different PMG specimens. The experiments were conducted with a high-precision force-measuring platform. The experimental results show that the EMG has several different characteristics as compared with PMG. As a result, the magnetic levitation performance is related to the gradient of magnetic flux density as well as the directional magnetic flux density components. The structure of the magnetic field also has great influence on the performance. The results will be helpful for further study of the properties of HTS maglev and provide guidance for the subsequent EMG design.

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The Effect of Magnetic Field Distribution and Pole Array on the Vertical Levitation Force Properties of HTS Maglev Systems

Cited by 31 publications

References 24 publications

Dynamic Characteristics of a YBCO Bulk Above an Electromagnet Guideway

Dynamic Characteristics of a YBCO Bulk Above an Electromagnet Guideway

Magnetic levitation force and trapped field properties of multiseeded YBCO with triangular arrangement of seeds

Comparative study between electromagnet and permanent magnet rails for HTS maglev

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