1. Key Laboratory of Control of Power Transmission and Conversion, Shanghai Jiao Tong University, Shanghai, China
2. School of Electrical Engineering, Chongqing University, Chongqing, China
3. Department of Electrical and Electronics Engineering, The Hong Kong Polytechnic University, Hong Kong, China
4. School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, China
5. Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China