1. The Research Institute of Power Drive and Control, Shanghai Maritime University, Shanghai 201306, China
2. Institut de Recherche de I’Ecole Navale (EA 3634 IRENav), French Naval Academy, 29240 Brest, France
3. Institut de Recherche en Energie Electrique de Nantes Atlantique, Nantes University, 44602 Saint-Nazaire, France
4. Institut de Recherche Dupuy de Lôme (UMR CNRS 6027 IRDL), University of Brest, 29240 Brest, France