Tutorial
| Tutorial 5 | Compensation Topologies, Magnetic Couplers, and Simultaneous Data Transfer Technologies in Wireless Power Transfer Systems |
| Date/Time | 24th May, 2021 Monday / 09:00 - 12:00 hrs |
| Speakers | Yijie Wang, Harbin Institute of Technology, China Yousu Yao, Harbin Institute of Technology, China Dianguo Xu, Harbin Institute of Technology, China |
Abstract
Wireless power transfer (WPT) was a hot research topic in power electronics in the last two decades because it shows many desirable characteristics such as flexibility, convenience, galvanic isolation, low maintenance, and extensive applicability. It will still be a hot research topic in the next two decades as the performance of state-of-theart WPT systems is not as good as expected. The problems hindering the employment of WPT systems in practical applications will be handled out one by one.
WPT systems originate from isolated DC/DC converter. The main difference between a WPT system and an isolated DC/DC converter is the transformer. The coupling of the transformer in a WPT system is loose but that in an isolated DC/DC converter is tight. Due to the employment of a loosely coupled transformer, compensation network must be included in a WPT system to lower the VA rating of the source and to improve thepower transfer efficiency. The source side and load side of a WPT system are physically separated. The useful data cannot be exchanged between the load side and source side using a wire. Hence, simultaneous wireless power and data transfer (SWPDT) technology is proposed.
This tutorial focuses on the abovementioned three aspects, i.e. compensation topologies, magnetic couplers, and SWPDT technologies. Two compensation topologies respectively showing the characteristics of load-independent output current and voltage will be addressed. In addition, the particle swarm optimization (PSO)-based parameter design method to obtain a coupling- and load-insensitive WPT system is going to be given. To further improve the output stability, two magnetic couplers, together with their optimization methods under given space, will be introduced. Lastly, three simultaneous wireless power and data transfer (SWPDT) systems, respectively regarded as the 1st, 2nd , and 3rd generation prototypes, will be presented. Some new technologies are employed in the later developed SWPDT system. Therefore, the performance of these three SWPDT systems is gradually improved. The key technologies utilized in the three SWPDT systems will be explained in detail. This tutorial will be presented for around 3 hours. It suits both researchers and professional engineers conducting researches in wireless power transfer.
Duration
Around 3 hours
Outline
1. Introduction
1.1 A glance at WPT
1.2 Challenges in WPT
2. Load-independent and coupling-and-load-insensitive compensation topologies
2.1 Significance and development of compensation topologies
2.2 LC/S compensation topology featuring load-independent output current
2.3 S/CLC compensation topology featuring load-independent output voltage
2.4 Coupling-and-load-insensitive compensation topologies using PSO algorithm
3. Design and optimization of high misalignment tolerant magnetic couplers
3.1 Overview on the proposed magnetic couplers
3.2 Impact of misalignment tolerance on power transfer efficiency
3.3 A high misalignment tolerant coupler based on concentrated magnetic flux
3.4 An EV-oriented coupler featuring light weight and high misalignment tolerance
4. Simultaneous wireless power and data transfer
4.1 Necessity of wireless data transfer in WPT systems
4.2 Problems of employing RF wireless communication technologies in WPT systems
4.3 Development of an SWPDT system using double-sided LCLC compensation topology
4.4 Improving the noise immunity of a SWPDT system using FSK modulation/demodulation
4.5 Key technologies for full-duplex data transfer in WPT systems
5. Conclusions and future works
Biography
Yijie Wang was born in Heilongjiang Province, China, in 1982. He received the B.S., M.S. and Ph.D. degrees in electrical engineering from Harbin Institute of Technology, China, in 2005, 2007 and 2012, respectively. From 2012 to 2017, he was a lecturer and associate professor with the Department of Electrical and Electronics Engineering, Harbin Institute of Technology. Since 2017, he has been a professor with the Department of Electrical and Electronics Engineering, Harbin Institute of Technology. His interests include DC-DC converters, soft-switching power converters, power factor correction circuits, digital control electronic ballasts, LED lighting systems. He received prize paper awards from IEEE Transactions on Power Electronics in 2018 and 2019, and the prize paper award from IEEE Transactions on Industry Applications in 2019. He also received the best paper awards of ITEC Asia-Pacific 2017, ITEC AsiaPacific 2018, ICEMS 2018 and ICEMS 2019. He was the corresponding guest editor of IEEE Transactions on Industrial Electronics for two Special Sections, “High and Very High Frequency Power Supplies for Industrial Applications” and “High Performance LED Drivers”, he was also the leading guest editor of IET Power Electronics for the Special Issue “Advanced Technologies Utilised in Wireless Power Transfer Systems”. He is an Associate Editor of the IEEE Transactions on Industrial Electronics, IEEE Journal of Emerging and Selected Topics in Power Electronics, IEEE Access, IET Power Electronics and Journal of Power Electronics.
Yousu Yao (S’18, M’19) was born in Jiangsu Province, China, in 1991. He received the B.S. and Ph.D. degrees in electrical engineering from Harbin Institute of Technology, Harbin, China, in 2014 and 2019, respectively. He is currently an Associate Professor with the School of Electrical Engineering and Automation, Harbin Institute of Technology. He has authored or coauthored more than 30 journal and conference papers and holds seven patents. His current research interests include wireless power transfer, DC/DC converter, magnetic coupler design, and simultaneous wireless power and data transfer.
Dr. Yao received the First Prize Paper Award from the IEEE TRANSACTIONS ON POWER ELECTRONICS, and the Best Paper Awards from the 22nd International Conference on Electrical Machines and Systems (ICEMS 2019), the 13th Symposium on Power Electronics & Electrical Drives (SPEED 2019), and the 2017 IEEE Transportation Electrification Conference and Expo Asia-Pacific (ITEC Asia-Pacific 2017).
Dianguo Xu received the M.S and Ph.D. degrees in electrical engineering from Harbin Institute of Technology (HIT), Harbin, China, in 1984 and 1989, respectively. In 1989, he joined the Department of Electrical Engineering, HIT, as an Assistant Professor, where he has been a Professor since 1994. He was the Dean of School of Electrical Engineering and Automation HIT, from 2000 to 2010. He is currently the Vice President of HIT. His current research interests include renewable energy power conversion technology, multi-terminal HVDC system based on MMC, power quality mitigation, speed sensorless vector-controlled motor drives, and high performance PMSM servo system.
Prof. Xu is the winner of 2018 IEEE Industry Applications Society Outstanding Achievement Award. He was promoted as a fellow of IEEE for the contribution to control of electrical drives and power electronic converters. He was general chair of ICEMS 2019 and IEEE ITEC Asia-Pacific 2017, TPC chair of IPEMC 2012-ECCE Asia and VPPC 2008. He has published over 600 journal papers, 4 book chapters, and held 63 patents. He received the prize paper awards from IEEE Transactions on Power Electronics in 2018 and 2019, and best papers awards from the conferences of ICEMS 2019, ITEC Asia-Pacific 2018, ITEC AsiaPacific 2017, ICEMS 2014, PCIM Asia 2014, IPEMC 2012-ECCE Asia and LSMS & ICSEE 2010. He is an Associate Editor for the IEEE Transactions on Industrial Electronics, IEEE Transactions on Power Electronics and IEEE Journal of Emerging and Selected Topics in Power Electronics. He is the Chairman of the IEEE Harbin Section, the vice president of China Electrotechnical Society (CES).
