The effects of the air gap between pancake windings on the central magnetic field in a high temperature superconducting magnet

Kang, Myunghun; Ku, Myunghwan; Lee, Hee-Joon; Cha, Gueesoo

doi:10.1016/j.cryogenics.2009.11.007

Cited by 12 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(4) and the constants in Table II are obtained using the measured and curve [6]. The specifications of the HTS magnet with pancake windings are given in Table III.…”

Section: Model For Analysismentioning

confidence: 99%

See 1 more Smart Citation

Properties of High Temperature Superconducting Magnet With Optimized Air Gap Between Pancake Windings

Kim

Cha

et al. 2011

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

In a magnet with pancake windings, inserting a gap between the pancake windings can increase the central magnetic field. This paper shows the optimized length of each gap is able to maximize the central magnetic field. Inserting a gap also improves field uniformity because the pancake windings are spread across a wider area. A high temperature superconducting (HTS) magnet consisting of BSCCO-2223 pancake windings was chosen for the calculation model to show the effectiveness of the proposed method. The relation was used to determine the critical current, and an evolution strategy was adopted for the optimization of gap length. The results of calculations show that the critical current and the central magnetic field increased by 86.0% and 33.7%, respectively, for a magnet consisting of ten pancake windings.

show abstract

“…(4) and the constants in Table II are obtained using the measured and curve [6]. The specifications of the HTS magnet with pancake windings are given in Table III.…”

Section: Model For Analysismentioning

confidence: 99%

“…Inserting a constant gap between the pancake windings was recently proposed to increase the central magnetic field [6].…”

Section: Introductionmentioning

confidence: 99%

Properties of High Temperature Superconducting Magnet With Optimized Air Gap Between Pancake Windings

Kim

Cha

et al. 2011

IEEE Trans. Appl. Supercond.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The application of HTS cable with YBCO tapes needs to solve the problem of high anisotropy. As to the high anisotropic of critical performance for YBCO tapes, a lot of works have been finished [14][15][16][17][18][19]. The flux diverter placed at both ends of the coil can increase the energy storage capacity and decrease the heat losses for SMES [14].…”

Section: Introductionmentioning

confidence: 99%

“…The ferromagnetic disk can be used to adjust the magnetic field orientation to be as close as possible to a parallel angle, which can enhance the critical current of the coil [16]. Inserting air gap (with the same distance) between the pancake coils of the SMES can enhance the critical current, which can further improve the operating performance [17]. With optimized changing gaps, the critical current of the HTS coil can be better enhanced [18].…”

Section: Introductionmentioning

confidence: 99%

Research on a novel HTS double pancake coil based on CORC: used for kA-level SMES of accelerator

Li¹,

Zheng²,

Sheng³

et al. 2022

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Large-scale complex needs high performance SMES system with 5 kA-level current carrying and kA/s current ramping rate (such as particle accelerator complex), the inductance of which should be as small as possible (<<1H) to reduce the terminal voltage and realize ideal energy evacuation. This paper introduces the world’s first application of double pancake (DP) coil with CORC cable, which can be a unit of MJ-level SMES system with a total inductance of 125 mH and 4 kA current carrying (@30 K, 4 T). The combination of low inductance and high current capacity guarantee the safety during kA/s operating condition. The CORC wound with highly anisotropic YBCO tape can realize quasi-isotropy with critical properties. The performance of the CORC with 11 layers and 3 tapes in each layer has been fully validated with excitation test at 77 K and the critical current can reach 2906 A@ 77 K, self-field. The skeleton of the DP coil is specially designed with semi-circular spiral groove and the climbing-layer area is supported by two symmetrical blocks, which can provide reasonable support to the CORC cable. The measured critical current of DP coil can realize 1750 A at 77 K (theoretical value is 1800 A). It means that the the coil winding method is feasible to avoid performance degradation during winding. The DP coil based on CORC cable is fully suitable for the SMES system which needs to realize ~4 kA current carrying and fast energy conversion. It also provides a good practice for the engineering application of CORC cable.

show abstract

“…In addition, inserting an air gap between single pancake coils can also optimize the SMES magnet. For example, inserting a fixed air gap in a conventional superconducting magnet could increase the central magnetic field and spontaneously increase the critical current [29], while, inserting unequal gaps in a single pan-cake coil could maximize the central magnetic field and thus the single pancake coil can be optimized with a wider area to improve the uniformity of the magnetic field [30].…”

Section: Introductionmentioning

confidence: 99%

Intelligent design of large-size HTS magnets for SMES and high-field applications: using a self-programmed GUI tool

Chen

Pang

Gou

et al. 2021

Supercond. Sci. Technol.

View full text Add to dashboard Cite

Different from many superconducting magnet designs based on the analytical algorithm and finite element method (FEM), this article presents an intelligent design of the SMES and high-field magnet using the self-programmed graphical user interface (GUI). As the important basis, the analytical solutions of SMES magnet are developed for calculating the magnetic field, inductance and critical current, whose accuracies are also verified by the experiment. Then, the analytical solutions are merged into the GUI tool with multi-window interface based on the MATLAB. The new platform is built to offer scientists and engineers a smart tool to design and optimize SMES magnets to reach the maximum energy capacity. After the structural optimization of a MJ-class SMES magnet, the critical current and energy capacity improve by 20.46% and 38.67%, respectively. Compared to previous superconducting magnet designs, this new platform for the SMES and high-field magnet design has the advantages of diverse HTS tape/magnet structure selections, user-friendly interface, automatic optimization, and fast speed.

show abstract

The effects of the air gap between pancake windings on the central magnetic field in a high temperature superconducting magnet

Cited by 12 publications

References 6 publications

Properties of High Temperature Superconducting Magnet With Optimized Air Gap Between Pancake Windings

Properties of High Temperature Superconducting Magnet With Optimized Air Gap Between Pancake Windings

Research on a novel HTS double pancake coil based on CORC: used for kA-level SMES of accelerator

Intelligent design of large-size HTS magnets for SMES and high-field applications: using a self-programmed GUI tool

Contact Info

Product

Resources

About