Developing Highly efficient HTS AC windings for fully superconducting machines

为全超导机器开发高效高温超导交流绕组

• 批准号: EP/P002277/2
• 负责人: Min Zhang
• 金额: $ 3.3万
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FP002277%2F2
• 关键词: Developing; Highly; efficient; HTS; AC

Superconductors have zero resistivity below their critical temperatures, enabling them to carry large amounts of current. Therefore, superconductors can be used to construct powerful electrical machines with light and compact designs. However, one key difficulty when designing superconducting machines is that superconductors dissipate heat when they carry AC current or in AC magnetic fields. This heat dissipation (AC loss) in a low temperature environment adds to the cost and difficulties of keeping the superconductors at low operational temperature. The AC loss reduces system efficiency because up to a hundred times the cooling power in room temperature is required to remove it. In order to increase the machine efficiency it is therefore vital to be able to accurately estimate how much AC loss is dissipated in a superconducting machine and to identify strategies to reduce this loss.Significant progress has been made towards understanding the AC loss of superconductors in research laboratories worldwide. However, estimating the AC loss of superconductors in electrical machines is an intrinsically difficult task. There is a complicated interaction between the current and the magnetic field inside an electrical machine and the influence of this interaction on the machine AC loss is unknown at this moment. Actions, both experimentally and numerically, are required to understand the AC loss of superconducting machines.The aim of this project is to develop new experimental and numerical tools to estimate the AC loss of superconducting machines. We will design an experiment to measure the AC loss of superconductors in a simulated electrical machine environment. We will also develop a new FEM model, which will be validated by experimental data, to efficiently estimate the AC loss of fully superconducting machines. Furthermore, we will use the model to identify new strategies to reduce the AC loss and improve the efficiency of fully superconducting machines, based on the latest HTS technologies.

超导体在其临界温度以下具有零电阻率，使它们能够携带大量电流。因此，超导体可以用来制造设计轻便紧凑的大功率电机。然而，设计超导机器的一个关键困难是，当超导体携带交流电流或在交流磁场中时，它们会散热。低温环境下的这种散热（交流损耗）增加了超导体在低工作温度下的成本和难度。交流电损耗会降低系统效率，因为去除交流电所需的冷却功率高达室温下的100倍。因此，为了提高机器效率，能够准确地估计超导机器中耗散的交流损耗并确定减少这种损耗的策略是至关重要的。世界各地的研究实验室在了解超导体的交流损耗方面取得了重大进展。然而，估计电机中超导体的交流损耗本质上是一项困难的任务。在电机内部，电流和磁场之间存在着复杂的相互作用，而这种相互作用对电机交流损耗的影响目前尚不清楚。要了解超导机器的交流损耗，需要实验和数值两方面的作用。本项目的目的是开发新的实验和数值工具来估计超导机器的交流损耗。我们将设计一个实验来测量超导体在模拟电机环境中的交流损耗。我们还将开发一个新的有限元模型，该模型将通过实验数据验证，以有效地估计全超导机器的交流损耗。此外，我们将基于最新的高温超导技术，利用该模型确定新的策略来减少交流损耗和提高全超导机器的效率。

项目成果

Multifilament HTS Cables to Reduce AC Loss: Proof-of-Concept Experiments and Simulation

• DOI: 10.1109/tasc.2023.3265436
• 发表时间: 2023
• 期刊: IEEE Transactions on Applied Superconductivity
• 影响因子: 1.8
• 作者: Tian Lan;Hengpei Liao;M. Iftikhar;W. Yuan;Alexandre Cole;Reda Abdouh;Min Zhang

Prediction of Nonsinusoidal AC Loss of Superconducting Tapes Using Artificial Intelligence-Based Models

• DOI: 10.1109/access.2020.3037685
• 发表时间: 2020
• 期刊: IEEE Access
• 影响因子: 3.9
• 作者: M. Yazdani-Asrami;Mehran Taghipour-Gorjikolaie;W. Song;Min Zhang;W. Yuan

An effective way to reduce AC loss of second-generation high temperature superconductors

• DOI: 10.1088/1361-6668/aaee05
• 发表时间: 2018-11
• 期刊: Superconductor Science and Technology
• 影响因子: 3.6
• 作者: Mingyang Wang;Min Zhang;Meng Song;Zhuyong Li;Fangliang Dong;Z. Hong;Zhijian Jin

Fully superconducting machine for electric aircraft propulsion: study of AC loss for HTS stator

• DOI: 10.1088/1361-6668/ab9687
• 发表时间: 2019-12
• 期刊: Superconductor Science and Technology
• 影响因子: 3.6
• 作者: Fangjing Weng;Min Zhang;Tian Lan;Yawei Wang;W. Yuan

Transient Test and AC Loss Study of a Cryogenic Propulsion Unit for All Electric Aircraft

全电动飞机低温推进装置瞬态试验及交流损耗研究

• DOI: 10.1109/access.2021.3073071
• 发表时间: 2021
• 期刊: IEEE Access
• 影响因子: 3.9
• 作者: Weng F