Comparison of three eddy current formulations for superconductor hysteresis loss modelling

被引：46

作者：

Lahtinen, V. ^{[1
]}

Lyly, M. ^{[1
]}

Stenvall, A. ^{[1
]}

Tarhasaari, T. ^{[1
]}

机构：

[1] Tampere Univ Technol, FIN-33101 Tampere, Finland

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2012年 / 25卷 / 11期

基金：

芬兰科学院;

关键词：

MAGNETIZATION;

D O I：

10.1088/0953-2048/25/11/115001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

As is well known, the superconductor hysteresis loss modelling problem may be formulated as an eddy current (EC) problem in which the resistivity of the superconducting region is modelled with a power law. We compare three EC formulations suitable for the modelling of superconductor hysteresis losses. Namely, the a-v-j-, T-phi- and h-formulations are discussed. We review these formulations, and through simulation results the properties of these formulations are discussed and their suitabilities for different modelling situations are compared. Special attention is paid to the h-formulation: we investigate the effects of the modelling decisions related to resistivity of the air region in an h-formulation based EC solver. According to the results, these decisions affect the energy distribution of the field solution and may even lead to seemingly contradictory behaviour.

引用

页数：14

共 28 条

[1] Modeling and Electrical Measurement of Transport AC Loss in HTS-Based Superconducting Coils for Electric Machines [J].