Torque ripple investigation in coaxial magnetic gears Panteleimon Tzouganakis, Vasilios Gakos, Christos Kalligeros, Christos Papalexis, Antonios Tsolakis and Vasilios Spitas MATEC Web Conf., 366 (2022) 01004 Published online: 06 October 2022 DOI: 10.1051/matecconf/202236601004