Analysis of eddy current losses during discharging period in a 600kJ SMES

Park, M.J.; Kwak, Sang-Yeop; Lee, S.Y.; Kim, W.S.; Lee, J.K.; Park, C.; Choi, Kyeongdal; Bae, Jeong-Hyo; Kim, S.H.; Sim, Kideok; Seong, K.C.; Jung, Hyun–Kyo; Hahn, Song–Yop

doi:10.1016/j.physc.2008.05.253

Cited by 7 publications

(1 citation statement)

References 5 publications

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“…For example, Ke-Xi Xu evaluated the eddy current loss in a superconducting bearing for flywheel applications [6]. M J Park reported analysis results of the eddy current losses in the HTS SMES [7]. Hae-Jin Sung also carried out a heat load analysis to design a large scale HTS generator [8].…”

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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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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Electromagnetic analysis of 1MJ class of high temperature superconducting magnetic energy storage (SMES) coil to be used in power applications

Kumar¹,

Kaur²

2018

AIP Conference Proceedings

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Analysis of Eddy-Current Loss and its Reduction in a Conduction-Cooled HTS Magnet

Ji¹,

Long²,

He³

et al. 2019

IOP Conf. Ser.: Earth Environ. Sci.

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Since conduction cooling system is environmental friendly and easy operating, the conduction-cooled method is widely used in cryogenic cooling system of high-temperature superconducting (HTS) magnet. The eddy-current losses are generated in the cooling structures when HTS magnet is charging and discharging or the current in the magnet is alternating. In this paper, a 3D model of analyzing the eddy-current loss was built. The eddy-current losses of a HTS magnet with different cooling structures were calculated. Thermal analysis of the HTS magnet was carried out together with the electromagnetic analysis. The effect of the cooling structures’ geometric parameters on the eddy-current losses was discussed. The methods of reducing the eddy-current loss were proposed. The analysis results demonstrate that the optimization of the geometric parameters would greatly benefit the reduction of the eddy-current losses.

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Analysis of eddy current losses during discharging period in a 600kJ SMES

Cited by 7 publications

References 5 publications

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

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

Electromagnetic analysis of 1MJ class of high temperature superconducting magnetic energy storage (SMES) coil to be used in power applications

Analysis of Eddy-Current Loss and its Reduction in a Conduction-Cooled HTS Magnet

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