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ABSTRACT
The research on high-efficient non-radiant wireless power transmission (WPT) system using high-quality factor resonant coupled coils has become remarkable for powering various portable household devices, biomedical implants, and electrical vehicles since last decade. Therefore, practical WPT must be able to support complicated coil configurations and keep following magnetic resonant conditions with maximum power transfer capability during coupling distance variation. In this paper, an adaptive two-side impedance matching technique using self-tuned L-matching circuits at both the transmitting and receiving sides is proposed for maximizing transmission efficiency in resonant coupled WPT system. The tuning value of inductance and capacitance for matching networks are derived based on the Q-based design principle, and extracted impedance ratios and S-parameters. The feasibility of the theoretical model is testified against simulation and measured data. The developed model shows that using two-side matching technique maximizes transmission efficiency over 80% for a range of 15–35 cm. The proposed technique also successfully retains the resonant frequency and is much more potential to provide maximum efficiency for the resonant coupled WPT system.
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No potential conflict of interest was reported by the authors.
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Notes on contributors
Surajit Das Barman
Surajit Das Barman received the BSc degree in electrical and electronic engineering from the Chittagong University of Engineering & Technology (CUET), Chittagong, Bangladesh, in 2009. He is currently working towards the MEngSc degree in electrical engineering at the University of Malaya, Malaysia. His research interests include wireless power transfer and power system analysis.
E-mail: [email protected].
Ahmed Wasif Reza
Ahmed Wasif Reza is currently working as a senior lecturer in the University of Malaya, Faculty of Engineering, Department of Electrical Engineering, Malaysia. He has been working in the field of radio frequency identification (RFID), radio wave propagation, wireless sensor network, wireless communications, biomedical image processing, and cognitive radio and electromagnetic research, both in industrial exposure and academically research valued work. He has authored and co-authored a number of Science Citation Index (SCI) journals and conference papers (more than 100 papers). Besides, he is a chartered engineer (CEng), UK as well as a professional member of IEEE, USA, and IET, UK. He has also participated as a reviewer and a committee member for a number of SCI/ISI journals and conferences.
E-mail: [email protected].
Narendra Kumar
Narendra Kumar is currently working as an associate professor in the University of Malaya, Faculty of Engineering, Department of Electrical Engineering, Malaysia. He was with R&D, Motorola Solutions as a principal staff engineer since early 1999. His research interests are high-efficiency and broadband power amplifiers and fast ramping power control. His name was included in the 2009 Who's Who in Science and Engineering. He was the recipient of the paper award in 2009 IEEE Microwave Propagations and System for his paper on broadband high-power distributed amplifier. His two papers on wideband matching circuits and non-linear microwave stability were an invited paper for IEEE Mediterranean Microwave Symposium 2010 (North Cyprus) and IEEE Wireless and Microwave Technology Conference 2012 (Florida, USA), respectively. Since June 2009, he is serving as a reviewer of IEEE Transactions on Microwave Theory Techniques, IET Circuit, Devices and Systems, etc. He is a senior member of Institute of Electrical Electronics Engineers (USA) and a fellow of Institution of Engineering Technology (UK).
E-mail: [email protected].
Tanbir Ibne Anowar
Tanbir Ibne Anowar received the BSc degree in electrical and electronic engineering from the Islamic University of Technology (IUT), Dhaka, Bangladesh, in 2005, and the MS degree in electrical engineering from the University of Malaya, Malaysia, in 2013. He is currently working towards the PhD degree in wireless power transmission in the Department of Electrical Engineering at University of Malaya, Malaysia. His research interests include power electronics and wireless power transmission in mid range for industrial and biomedical applications, antenna and propagation, and electro-telecom integrated devices for smart grid applications.
E-mail: [email protected].