Pole-changing motor for lift installation Makhsud Bobojanov, Dauletbek Rismuxamedov, Furkat Tuychiev, Khusniddin Shamsutdinov and Khayotullo Magdiev E3S Web Conf., 216 (2020) 01164 Published online: 14 December 2020 DOI: 10.1051/e3sconf/202021601164