ICEMS2017 Keynote Presentation
Key Technologies of Compound-Structure
Synchronous Machines for Hybrid Electric Vehicles
Due to the rising pressure of energy crisis and environmental pollution, hybrid electric vehicles (HEVs), especially series-parallel HEVs, have gained much attention. Many well-known series-parallel HEVs, such as Toyota Prius and Chevy Volt, employ a planetary gear unit for power splitting. The planetary gear unit enables independent speed and torque control of the internal combustion engine (ICE) with maximum system efficiency. Unfortunately, it suffers from its main drawbacks, such as mechanical vibration, noise, and maintenance. To get rid of the planetary gear unit, researchers have proposed various pure electrical schemes based on the compound-structure permanent-magnet synchronous machine (CS-PMSM). The CS-PMSM, also known as four-quadrant transducer (4QT), electrical variable transmission (EVT), or dual mechanical port (DMP) electrical machine, has similar function as planetary gear unit and has the advantages of compact structure and easy control. At present, CS-PMSMs are classified into two types: schemes with brushes and without brushes. CS-PMSMs in early period of investigation all have brushes. Owing to the inherent defects of brushes and slip rings, various brushless CS-PMSMs are further proposed. In this presentation, topologies and operation principles of CS-PMSMs will be introduced. Further, analysis and solution of key technical problems, such as magnetic couplings and overheating of the inner-rotor windings in brush CS-PMSMs, and low power factor and high harmonic losses in brushless CS-PMSMs, and control strategy of CS-PMSM, will be detailed. Finally, some current trends and challenges are also discussed.
Prof. Ping Zheng
Deputy Director, Institute of Electromagnetic and Electronic Technology
Harbin Institute of Technology, China
Prof. Ping Zheng received the B.Sc., M.Sc., and Ph.D. degrees from Harbin Institute of Technology, Harbin, China, in 1992, 1995, and 1999, respectively, all in electrical engineering. Since 1995, she has been with Harbin Institute of Technology, where she has been a professor since 2005. Since 2007, she is the deputy director of the Institute of Electromagnetic and Electronic Technology, Harbin Institute of Technology.
She is the author or coauthor of more than 210 published refereed technical papers and four books. She is the holder of 50 Chinese invention patents. Her current research interests include electric machines and control, electric vehicles, and unconventional electromagnetic devices.
Prof. Zheng is an IEEE senior member since 2005, and also a member of the IEEE Electric Machines Committee, the IEEE Industrial Electronics Society, the IEEE Industry Applications Society, the IEEE Standards Association, and the International Compumag Society. She was a recipient of more than 30 technical awards, including the “China Youth Science and Technology Award” from the Organization Department of the Communist Party of China in 2009, the “National Science Foundation for Distinguished Young Scholars of China” from the National Natural Science Foundation of China in 2013, the “Chang Jiang Scholar” from the Ministry of Education of China in 2014, and the “National High-Level Talent Special Support Program” from the Organization Department of the Communist Party of China in 2016.