Design and market considerations for axial flux superconducting electric machine design

11th European Conference on Applied Superconductivity

Ainslie, M.D.^1 ; George, A.^2 ; Shaw, R.^2 ; Dawson, L.^3 ; Winfield, A.^3 ; Steketee, M.^4 ; Stockley, S.^5

Bulk Superconductivity Group, Department of Engineering, University of Cambridge, Trumpington Street, Cambridge

CB2 1PZ, United Kingdom^1

Department of Materials Science and Metallurgy, University of Cambridge, Pembroke Street, Cambridge

CB2 3QZ, United Kingdom^2

Department of Physics, Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge

CB3 0HE, United Kingdom^3

Department of Chemical Engineering and Biotechnology, University of Cambridge, New Museums Site, Pembroke Street, Cambridge

CB2 3RA, United Kingdom^4

Judge Business School, University of Cambridge, Trumpington Street, Cambridge

CB2 1AG, United Kingdom^5

关键词: Axial flux machines;    Bulk superconductors;    Conventional materials;    Future applications;    Power out put;    Stator winding;    Temperature range;    Trapped field;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/3/032002/pdf
DOI  :  10.1088/1742-6596/507/3/032002

来源: IOP

【 摘 要 】

In this paper, the authors investigate a number of design and market considerations for an axial flux superconducting electric machine design that uses high temperature superconductors. The axial flux machine design is assumed to utilise high temperature superconductors in both wire (stator winding) and bulk (rotor field) forms, to operate over a temperature range of 65-77 K, and to have a power output in the range from 10s of kW up to 1 MW (typical for axial flux machines), with approximately 2-3 T as the peak trapped field in the bulk superconductors. The authors firstly investigate the applicability of this type of machine as a generator in small- and medium-sized wind turbines, including the current and forecasted market and pricing for conventional turbines. Next, a study is also carried out on the machine's applicability as an in-wheel hub motor for electric vehicles. Some recommendations for future applications are made based on the outcome of these two studies. Finally, the cost of YBCO-based superconducting (2G HTS) wire is analysed with respect to competing wire technologies and compared with current conventional material costs and current wire costs for both 1G and 2G HTS are still too great to be economically feasible for such superconducting devices.