1. Department of Electrical and Computer EngineeringUniversity of North Carolina at Charlotte9201 University, City BoulevardCharlotteNC28223USA
2. Department of Engineering TechnologyUniversity of North Carolina at Charlotte9201 University, City BoulevardCharlotteNC28223USA
3. Laboratory for Electromechanical Energy Conversion and ControlDepartment of Electrical and Computer EngineeringPortland State University1900 SW 4th AvenuePortlandOR97201USA