Feasibility of a goods transportation system with a superconducting magnetic levitation guide – load characteristics of a magnetic levitation guide using a bulk high-Tc superconductor

Okano, Makoto; Iwamoto, Tatsuya; Fuchino, S.; Tamada, Noriharu

doi:10.1016/s0921-4534(02)02111-1

Cited by 26 publications

(10 citation statements)

References 3 publications

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“…Magnetic levitation transportation, as a new type of rail transport system, uses two sets of magnets: one set to repel and push the train up off the track, and another set to move the elevated train ahead, taking advantage of the lack of friction [1]. It has advantages of high speed, safety, comfort, low noise, low pollution, strong climbing ability, and freedom of line selection [2]. us, the application of maglev technology in urban transportation, regional traffic, intercity traffic, and the national backbone network has a good prospect [3].…”

Section: Background and Objectivesmentioning

confidence: 99%

Numerical Analysis of a New Block‐Type Rail Bearing Beam for the Mid‐Low‐Speed Maglev Train

Wang

Xie

et al. 2021

Advances in Civil Engineering

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In this study, a new block-type rail bearing beam is presented, which consists of a cast-in-place base and prefabricated blocks. The finite element analysis is conducted to assess the proposed new rail bearing beam structure. The performed finite element method (FEM) simulation focused on the dynamic stress at the bottom of the rail bearing beam and structural internal force and deformation under the case of train loading, etc. Besides, the relationship between first-order natural frequency and activation frequency in the new support rail beam structure is analyzed and the beneficial effects on the internode connection structure are quantified. The results show that the increase in driving speed has the most significant effect on the vertical acceleration of the structure, and the self-vibration frequency of the structure is relatively large, which means the structure is safe. Since previous research seldom focuses on this block-type rail bearing beam, this study lays a valuable foundation for the construction of a rail bearing beam for the mid-low-speed maglev train.

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Section: Background and Objectivesmentioning

confidence: 99%

Numerical Analysis of a New Block‐Type Rail Bearing Beam for the Mid‐Low‐Speed Maglev Train

Wang

Xie

et al. 2021

Advances in Civil Engineering

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“…Trapped flux lines allow for the establishment of an interaction between the magnet and superconductor, and thus to magnetic levitation [15,18], as can be observed in many videos available on the Internet [19-21]. Practical applications include levitation trains and magnetic bearings [22][23][24][25], whose aim is taking advantage of the lack of friction between moving parts made from superconductors and magnets.…”

Section: Meissner Effect and Levitationmentioning

confidence: 99%

Demonstration experiments for solid-state physics using a table-top mechanical Stirling refrigerator

Osorio¹,

Palacio-Morales²,

Rodrigo³

et al. 2012

Eur. J. Phys.

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Liquid free cryogenic devices are acquiring importance in basic science and engineering. But they can also lead to improvements in teaching low temperature an solid state physics to graduate students and specialists. Most of the devices are relatively expensive, but small sized equipment is slowly becoming available. Here, we have designed several simple experiments which can be performed using a small Stirling refrigerator. We discuss the measurement of the critical current and temperature of a bulk YBa 2 Cu 3 O 7−δ (YBCO) sample, the observation of the levitation of a magnet over a YBCO disk when cooled below the critical temperature and the observation of a phase transition using ac calorimetry. The equipment can be easily handled by students, and also used to teach the principles of liquid free cooling.

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“…Applications of magnetic levitation systems have gained expanding importance in industry during the last few decades. The most popular usage areas are magnetic bearings [1][2][3][4], transportation systems [5][6][7], and actuation of objects in micro-and nanoscales [8,9]. Because there is no mechanical contact between levitation system and levitating object, consisting of a ferromagnetic material, mechanical friction has almost no effect on system parameters (except air friction, which has a comparatively low value) on the levitating object [10].…”

Section: Introductionmentioning

confidence: 99%

Force and torque parameter estimation for a 4-pole hybrid electromagnet by ANFIS hybrid learning algorithm

Atlıhan¹,

Yalçin²,

Erkan³

2017

Turk J Elec Eng & Comp Sci

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Abstract:In this study, a force and torque estimation method based on an adaptive neuro-fuzzy inference system (ANFIS) has been developed to get rid of multiple integral calculations of air gap coefficients that cause time delay for magnetic levitation control applications. During magnetic levitation applications that contain a 4-pole hybrid electromagnet, multiple integral calculations have to be done for obtaining air gap permanence parameters, and these parameters are needed to calculate force and torque parameters that are produced by the poles of the hybrid electromagnet, which means, if time delay occurs for calculation of permanence parameters, actual force and actual torque values that are produced by hybrid electromagnet's poles cannot be exactly known; thus, the advantage of having an exact model of the system gets lost and, as a result, the controller's performance goes down. To address a solution, an ANFIS using a hybrid learning algorithm consisting of backpropagation and least-squares learning methods is proposed to estimate force and torque parameters using training data already obtained using multiple integral calculations before.

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Feasibility of a goods transportation system with a superconducting magnetic levitation guide – load characteristics of a magnetic levitation guide using a bulk high-Tc superconductor

Cited by 26 publications

References 3 publications

Numerical Analysis of a New Block‐Type Rail Bearing Beam for the Mid‐Low‐Speed Maglev Train

Numerical Analysis of a New Block‐Type Rail Bearing Beam for the Mid‐Low‐Speed Maglev Train

Demonstration experiments for solid-state physics using a table-top mechanical Stirling refrigerator

Force and torque parameter estimation for a 4-pole hybrid electromagnet by ANFIS hybrid learning algorithm

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