1. Levi E. Multiphase electric machines for variable-speed applications. IEEE Transactions on Industrial Electronics. 2008;55(5):1893-1909
2. Levi E. Advances in converter control and innovative exploitation of additional degrees of freedom for multiphase machines. IEEE Transactions on Industrial Electronics. 2016;63(1):433-448
3. Zhang Z, Matveev A, Ovrebo S, Nilssen R, Nysveen A. State of the art in generator technology for offshore wind energy conversion systems. In: Electric Machines Drives Conference (IEMDC), 2011 IEEE International; May 2011. pp. 1131-1136
4. Li H, Chen Z. Design optimization and evaluation of different wind generator systems. In: International Conference on Electrical Machines and Systems, 2008. ICEMS 2008; Oct 2008. pp. 2396-2401
5. Levi E, Bojoi R, Profumo F, Toliyat HA, Williamson S. Multiphase induction motor drives—A technology status review. IET Electric Power Applications. 2007;1(4):489-516