Analysis and design of a coreless permanent-magnet machine considering the winding shape by using a lumped equivalent magnetic circuit modelJung-Moo Seo, In-Soung Jung, Hyun-Kyo Jung and Jong-Suk RoEur. Phys. J. Appl. Phys., 66 2 (2014) 20902DOI: https://doi.org/10.1051/epjap/2014130392