“…Various controllers have been proposed to improve the performance of position/speed control in permanent magnet step motors [Shin et al, 2013;Chen and Chin, 2000;Lee et al, 2010;Kim et al, 2013;Shin et al, 2017;Ivanov et al, 2021;Shin et al, 2016;Lee et al, 2017;Le et al, 2017].…”