Heat load characteristics of new superconducting magnets for the Yamanashi test line

Tsuchishima, H; Terai, Motoaki; Yoshida, H.; Watanabe, Hiroyuki; Yamaji, M.; Matsuda, Masaharu; Jizo, Yoshihiro; Fujimoto, T.

doi:10.1016/s0011-2275(97)00035-0

Cited by 4 publications

(3 citation statements)

References 1 publication

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“…When magnetic fluxes of the propulsion coils and superconducting coils are directed as shown in the diagram, both attract each other, and the superconducting coils move together with magnetic flux of the propulsion coils; thus, the bogie moves forward. A superconducting coil has 1167 turns, while the applied current is 600 A; that is, magnetomotive force of 700 kA 22 is generated. On the other hand, a propulsion coil has about 10 turns, while the applied current is supposed to be almost same; thus, the magnetomotive force is only about 6 kA 23,24 .…”

Section: Phenomenon Of Electromagnetic Induction In Telecommunicationmentioning

confidence: 99%

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Finite element analysis method for electromagnetic induction to telecommunication line by MAGLEV train

Tokuda

Sakai

Yarita

et al. 2020

Elect Comm in Japan

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When a magnetic levitation rail carrying a superconducting coil moves at high speed, an electromagnetic induction voltage is generated in the surrounding telecommunication line due to Faraday's electromagnetic induction. This phenomenon is analyzed by AC/DC module of COMSOL multiphysics. The telecommunication line is modeled for a common mode flowing in a loop between the telecommunication line and the ground. As a result, we devise a method to calculate the induced voltage to the telecommunication line loop by differentiating in position the position dependency of the superconducting coil with respect to the magnetic flux linking the telecommunication line loop. In addition, to confirm the validity of the calculation method in COMSOL, we compare flux linkages for a model on the ground surface and a model in the complete free space, and also compare the results calculated with MATLAB by modeling with a lumped constant circuit and the results calculated with COMSOL.

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Section: Phenomenon Of Electromagnetic Induction In Telecommunicationmentioning

confidence: 99%

“…The superconducting coil shown in Figure 7A has 1167 turns. A steady current of 600 A is applied to the coil so that the magnetomotive force is 700 kA 22 …”

Section: Calculation Of Electromagnetic Induction Using 3d Model Withmentioning

confidence: 99%

Finite element analysis method for electromagnetic induction to telecommunication line by MAGLEV train

Tokuda

Sakai

Yarita

et al. 2020

Elect Comm in Japan

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“…Some AC magnetic fields penetrate the outer vessel and reach the superconducting coil, which causes eddy current heating. The eddy current heating can cause quench in the LTS magnet [5]. Generally, high temperature superconducting (HTS) magnets are robust against heat load.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of eddy current heating in a REBCO magnet due to the magnetic field of ground coils for the maglev

Mizuno

Tanaka

Ogata

2020

Supercond. Sci. Technol.

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A REBCO magnet has been developed for the electromagnetic vibration test of the ground coils for the maglev. The ground coils receive vibration force when a maglev vehicle passes through. That vibration force can be reproduced by exciting the ground coil by combination of AC and DC in the high magnetic field of the superconducting magnet. This electromagnetic vibration test is also important for the development of REBCO magnets aimed at maglev application. This test enables us to evaluate eddy current heating in the REBCO coil. We carried out the evaluation test of eddy current heating with the REBCO magnet. Experimentally obtained heat load values show good agreement with the simulation results. Additionally, the heating spot in the REBCO coil corresponds with the eddy current distribution from the simulation. We also estimated the eddy current heating under actual maglev running conditions. It was 0.25 W coil −1 at 500 km h −1 , which is the rated running velocity of the maglev. This heat load due to the eddy current is only 1% of the total heat load to the magnet. It seems that the eddy current heating hardly affects the cooling system of the magnet.

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Analysis for AC Loss by Electromagnetic Disturbance in HTS Magnet for Maglev Train

Mun

Lee

Choi

et al. 2023

IEEE Trans. Appl. Supercond.

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Heat load characteristics of new superconducting magnets for the Yamanashi test line

Cited by 4 publications

References 1 publication

Finite element analysis method for electromagnetic induction to telecommunication line by MAGLEV train

Finite element analysis method for electromagnetic induction to telecommunication line by MAGLEV train

Evaluation of eddy current heating in a REBCO magnet due to the magnetic field of ground coils for the maglev

Analysis for AC Loss by Electromagnetic Disturbance in HTS Magnet for Maglev Train

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