The Establishment of an Analytical Model for Coreless HTS Linear Synchronous Motor With a Generalized Racetrack Coil as the Secondary

Zhao, Zhengwei; Liu, Kang; Wang, Chao; Zhang, Weihai; Li, Jing; Han, Le; Song, Xuliang

doi:10.1109/tasc.2019.2901015

Cited by 14 publications

(1 citation statement)

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“…Moreover, complex geometries and operating conditions such as saddle coils and twisted stacks of tapes under an external magnetic field cannot be analyzed with a 2D model. For these reasons, several efforts were made for the development of tools and methodologies that allow 3D modeling of HTS coils [24][25][26][27][28]. As part of these efforts, in 2014 the 3D H homogenization was introduced with the model of a racetrack coil [29].…”

Section: Introductionmentioning

confidence: 99%

3D homogenization of the T-A formulation for the analysis of coils with complex geometries

Vargas-Llanos

Huber²,

Riva³

et al. 2022

Supercond. Sci. Technol.

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The modeling and analysis of superconducting coils is an essential task in the design stage of most devices based on high-temperature superconductors (HTS). These calculations allow verifying basic estimations and assumptions, proposing improvements, and computing quantities that are not easy to calculate with an analytical approach. For instance, the estimation of losses in HTS is fundamental during the design stage since losses can strongly inﬂuence the cooling system requirements and operating temperature. Typically, 2D ﬁnite element analysis is used to calculate AC losses in HTS, due to the lack of analytical solutions that can accurately represent complex operating conditions such as AC transport current and AC external applied magnetic ﬁeld in coils. These 2D models are usually a representation of an inﬁnitely long arrangement. Therefore, they cannot be used to analyze end effects and complex 3D conﬁgurations. In this publication, we use the homogenization of the T-A formulation in 3D for the analysis of superconducting coils with complex geometries where a 2D approach can not provide accurate analyses and veriﬁcation of assumptions. The modeling methodology allows an easier implementation in commercial software (COMSOL Multiphysics) in comparison with the currently available 3D H homogenization, despite the complexity of the geometry. This methodology is ﬁrst validated with a racetrack coil (benchmark case) by comparing the results with the well-established H formulation. Then, the electromagnetic behavior of coils with more complex geometries is analyzed.

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