Transport AC losses analysis of twisted quasi-isotropic conductor

Pi, Wei; Meng, Yiran; Guo, Tie; Wei, Defu; Wang, Yueyin; Liu, Ziqiu; Li, Guoqing; Wang, Yinshun

doi:10.1016/j.physc.2020.1353707

Cited by 8 publications

(2 citation statements)

References 17 publications

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“…In [30], AC losses in a twisted quasi-isotropic superconducting conductor stacked by HTS tapes and copper tapes alternatively were investigated by 3D simulations based on T-A formulation and experiments. A twisting apparatus was developed to accurately adjust and fix the twist angles of the quasi-isotropic conductor.…”

Section: Cables With Twisted Structuresmentioning

confidence: 99%

The T-A formulation: an efficient approach to model the macroscopic electromagnetic behaviour of HTS coated conductor applications

Huber

Song

Zhang

et al. 2022

Supercond. Sci. Technol.

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In recent years, the T-A formulation has emerged as an efficient approach for modelling the electromagnetic behaviour of high-temperature superconductor (HTS) tapes in the form of coated conductors (CCs). HTS CCs are characterized by an extremely large width-to-thickness ratio of the superconducting layer, normally up to 1000~6000, which in general leads to a very large number of degrees of freedom. The T-A formulation considers the superconducting layer as infinitely thin. The magnetic vector potential A is used to calculate the magnetic field distribution in all simulated domains. The current vector potential T is used to calculate the current density in the superconducting layer, which is a material simulated with a highly nonlinear power-law resistivity. This article presents a review of the T-A formulation. First, the governing equations are described in detail for different cases (2D and 3D, cartesian and cylindrical coordinates). Then, the literature on the implementation of T-A formulation for simulating applications ranging from simple tape assemblies to high field magnets is reviewed. Advantages and disadvantages of this approach are also discussed.

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Section: Cables With Twisted Structuresmentioning

confidence: 99%

The T-A formulation: an efficient approach to model the macroscopic electromagnetic behaviour of HTS coated conductor applications

Huber

Song

Zhang

et al. 2022

Supercond. Sci. Technol.

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“…After continuous research, MIT researchers propose another CICC structure based on TSTC that is taking the above conductor as the sub-cable to develop CICC with stronger current carrying capacity [9]. Although the production of Q-IS with practical length has been realized and its critical current [23], AC loss [24], thermal stability [25] and mechanical characteristics [26,27] have been studied, the CICC design based on Q-IS has not been studied.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis and experiment of critical current of a preliminary CICC model made from quasi-isotropic strands

Nie¹,

Wang²,

Zhang³

et al. 2022

Supercond. Sci. Technol.

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The rare-earth barium copper oxide (REBCO) tape has a good development prospect in the application of large high field magnets with low temperature because of its high critical current density and excellent mechanical and electro-magnetic properties. In recent years, some superconducting conductors based on REBCO tapes have been proposed, such as cable-in-conduit conductor (CICC) designed based on TSTC and CORC. In this paper, a type of preliminary CICC model is proposed and fabricated based on the quasi-isotropic strand (Q-IS). The critical current characteristics of the model and the contact resistance of copper terminal are analysed, respectively. Firstly, the critical current of a partially-filled superconducting CICC is calculated by self-consistent model at 77K/self-field. Then, a preliminary CICC experimental sample is made and tested to measure its critical current. Finally, the critical current of a full-size superconducting CICC under different magnetic induction intensities and external magnetic field orientations at 77K and 4.2K are also calculated, respectively. The results provide another CICC candidate for the application of large high field magnet in the future.

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Persistent current effects in highly homogeneous superconducting magnets

et al. 2022

Physica C: Superconductivity and its Applications

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Transport AC losses analysis of twisted quasi-isotropic conductor

Cited by 8 publications

References 17 publications

The T-A formulation: an efficient approach to model the macroscopic electromagnetic behaviour of HTS coated conductor applications

The T-A formulation: an efficient approach to model the macroscopic electromagnetic behaviour of HTS coated conductor applications

Numerical analysis and experiment of critical current of a preliminary CICC model made from quasi-isotropic strands

Persistent current effects in highly homogeneous superconducting magnets

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