1. Department of Electrical Engineering, City University of Hong Kong, Hong Kong
2. Department of Electrical Engineering, Southwest Jiaotong University, Chengdu, China
3. Professorship of Power Electronics, Chemnitz University of Technology, Chemnitz, Germany
4. Facultad de Ingenieria, Universidad de Talca, Curico, Chile
5. Hong Kong Polytechnic University, Hong Kong