1. School of Mechanical and Electrical Engineering, Institute for Electric Vehicle Driving System and Safety Technology, University of Electronic Science and Technology of China (UESTC), Chengdu, China
2. Sichuan BOMCO Petroleum Drill Bit Company, Ltd., Chengdu, China
3. Department of Energy Technology, Aalborg University, Aalborg, Denmark
4. Department of Electrical Engineering, Faculty of Engineering, Universidad de Talca, Curico, Chile
5. Department of Electronics and Information Engineering, Jeonbuk National University, Jeonju, South Korea