1. Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA, USA
2. Department of Electrical and Computer Engineering, Rowan University, Glassboro, NJ, USA
3. College of Engineering, University of Arkansas, Fayetteville, AR, USA
4. Center for Power Electronics Systems, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
5. Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
6. School of Electrical Engineering and Computer Science, Oregon State University, Corvallis, OR, USA