Development and research of pole-changing winding for a close pole ratio Daulet Rismukhamedov, Maxsud Bobojanov, Furkat Tuychiev and Khusniddin Shamsutdinov E3S Web Conf., 264 (2021) 03057 Published online: 02 June 2021 DOI: 10.1051/e3sconf/202126403057