1. Power Electronics, Machines and Control (PEMC) Group, the Department of Electrical and Electronic Engineering, University of Nottingham, Nottingham, U.K.
2. Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, University of Nottingham Ningbo China, Ningbo, China
3. Power Electronic System Laboratory at Arkansas (PESLA), Department of Electrical Engineering, University of Arkansas, Fayetteville, USA