"Wataru Kawamura,Kuan-Liang Chen,Makoto Hagiwara,Hirofumi Akagi","A Low-Speed, High-Torque Motor Drive Using a Modular Multilevel Cascade Converter Based on Triple-Star Bridge Cells (MMCC-TSBC)",,"IEEE Transactions on Industry Applications",,"Vol. 51","No. 5","pp. 3965-3974",2015,Sept.