Simulation of YBCO Tape and Coils in HTS Maglev System

Mengxiao Song,Jie Li,H.L Yuan,E.X Wang,R.K Agarwal,P Tandon

doi:10.1051/matecconf/20179515010

Mengxiao Song, Jie Li + Show 4 more

Open Access

https://doi.org/10.1051/matecconf/20179515010

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Abstract

In the process of running high temperature superconducting maglev train, the AC(Alternating Current) loss of superconducting coil is directly related to its safe operation and operating cost. In this paper, the simulation model was built based on the finite element software COMSOL Multiphysics, and mainly simulated and calculated the AC losses of YBCO(Yttrium Barium Copper Oxide) tape and coils. In this model, as the solving object, the singular and infinite long YBCO tape and coils model was solved with H-formulation and the nonlinear characteristic (E-J constitutive law) and anisotrophy (B-J characteristic) were taken into consideration as the theoretical foundation. Then on the basis of the model under maglev suspension system, AC losses under different amplitude and frequence AC currents were calculated. The results shows that under different frequencies and dynamic components, the local maximum AC loss of YBCO tape and coils occurs when the steady-state DC(Direct Current) current is 30A. Then comparing with old maglev suspension system, the new system can greatly reduce the energy consumption and the material cost.

Highlights

Maglev is considered a promising way of rail transport system
The results shows that under different frequencies and dynamic components, the local maximum AC losses of YBCO tape and coils occurs when the steady-state DC current is 30A[11,12,13]
With the same magnetic motive force, the coil turns required will reduce by 40%

Summary

Introduction

Maglev is considered a promising way of rail transport system. It has lots of advantages which traditional wheelrail trains do not have. Maglev trains does not contact tracks during running, so that there is no mechanical friction, which makes the noise greatly reduced. Maglev train uses aluminum coils, so there are resistive losses in the suspension process which makes the electromagnets generate more heat, and results in a waste of energy. Simulate and calculate the AC losses of YBCO tape and coils under different kinds of current inputs. This simulation is based on different types of given current to calculate the AC losses of the tape and coils

The tape simulation

The coils

Conclusion