1. Jiangsu Key Laboratory of New Energy Generation and Power ConversionDepartment of Electrical EngineeringCollege of Automation EngineeringNanjing University of Aeronautics and AstronauticsNanjingJiangsu ProvincePeople's Republic of China
2. Department of Electrical and Computer EngineeringInstitute for Electrical Drive Systems and Power ElectronicsTechnical University of MunichMunichGermany