jpcsJournal of Physics: Conference SeriesJ. Phys.: Conf. Ser.1742-65881742-6596IOP PublishingJPCS_1559_1_01213610.1088/1742-6596/1559/1/012136J15591136PaperEffect of HTS stack sectioning on pulse magnetization efficiency in a motorSmaraA1Climante-AlarconV1MineevN1TomkowL1GlowskiB A12 Department of Materials Science and Metallurgy, University of Cambridge, CB3 0FS, Cambridge, UK Institute of Power Engineering, 01-330 Warsaw, Poland 0620200106202015591012136Published under licence by IOP Publishing Ltd2020 Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Abstract

Stacks of HTS superconductors can be magnetized and used as a surface mounted magnet for electrical machines. Pulse field magnetization is considered as a practical method; however, the amplitude of the pulse can be limited in an electrical motor which results in an under-saturated stack with the superconducting currents penetrating only a part of it making the magnetization less efficient. A solution to this problem could be sectioning the stack along its width enabling effective penetration of the superconducting currents. In this paper we investigate the effect of sectioning of HTS surface mounted stacks on the efficiency of pulse magnetization method in trapping the flux using low pulsing field. It is shown that the sectioning of wide stacks into several narrower parts results in a higher trapped flux at low pulses. Experimental measurements are performed on a lab-scale motor to validate the theoretical analysis.