1. College of Electrical Engineering, Zhejiang University, Hangzhou, China
2. Key Laboratory of More Electric Aircraft Technology of Zhejiang Province, University of Nottingham Ningbo China, Ningbo, China
3. Nottingham Electrification Center, University of Nottingham Ningbo China, Ningbo, China
4. Power Electronics, Machines and Control Group, University of Nottingham, Nottingham, U.K.