A Novel Seven-Level Hybrid-Clamped (HC) Topology for Medium-Voltage Motor Drives Tian, Hao ; Li, Yuzhuo ; Li, Yun Wei Abstract Publication: IEEE Transactions on Power Electronics Pub Date: July 2018 DOI: 10.1109/TPEL.2017.2780058 Bibcode: 2018ITPE...33.5543T