No CrossRef data available.
Article contents
Resonance-filtering combo system for continuous wireless charging range coverage
Published online by Cambridge University Press: 19 October 2020
Abstract
Distribution of wireless power charging field uniformly on a large area pad is critical for power receivers, particularly for wearable devices, wherein small form factor coils are involved. Since the receiver coil size is quite limited in these types of applications, the device is very sensitive to the amount of field it could retain and hence, it needs special placement or snapping mechanism to fix it at an optimum location for reliable wireless charging. In order to overcome this limitation for the end-user, a dual-mode multi-coil power transceiver system is proposed; utilizing resonance filtering to increase the amount of total power delivered with the rather uniform spatial distribution. Two concentric coils; center one driven by 6.78-MHz high-frequency driver (A4WP) and the outer larger one with a 200-KHz low-frequency driver (Qi) with resonant blocker could transfer up to 50 mW standards compliant flat power to a 13-mm radius 30-turns wearable receiver coil everywhere across an 8-cm radius charging pad area without any alignment requirement or snapping. Two different feedback topologies corresponding to each of the H-Bridge power drivers were also presented as an automatic series resonance coil drive frequency lock mechanism, extracting peak powers for each system individually from a standard 5 V-1A USB wall charger.
- Type
- Research Article
- Information
- Copyright
- Copyright © The Author(s), 2020. Published by Cambridge University Press
References
Imura, T and Hori, Y (2011) Maximizing air gap and efficiency of magnetic resonant coupling for wireless power transfer using equivalent circuit and Neumann formula. IEEE Transactions on Industrial Electronics 58, 4746–4752.Google Scholar
Berger, A, Agostinelli, M, Vesti, S, Oliver, JA, Cobos, JA and Huemer, M (2015) Phase-shift and amplitude control for an active rectifier to maximize the efficiency and extracted power of a wireless power transfer system. Proceedings of IEEE-APEC, Charlotte, NC, USA, pp. 1620–1624.Google Scholar
Cove, SR, Ordonez, M, Shafiei, N and Zhu, J (2016) Improving wireless power transfer efficiency using hollow windings with track-width-ratio. IEEE Transactions on Power Electronics 31, 6524–6533.Google Scholar
Zhu, Q, Su, M, Sun, Y, Tang, W and Hu, AP (2018) Field orientation based on current amplitude and phase angle control for wireless power transfer. IEEE Transactions on Industrial Electronics 65, 4758–4770.Google Scholar
Zhang, Y, Lu, T, Zhao, Z, He, F, Chen, K and Yuan, L (2015) Quasi-uniform magnetic field generated by multiple transmitters of magnetically-coupled resonant wireless power transfer. Proceedings of IEEE-ICEMS, Pattaya, Thailand, pp. 1030–1034.CrossRefGoogle Scholar
You, Y, Soong, BH, Ramachandran, S and Liu, W (2010) Palm size charging platform with uniform wireless power transfer. Proceedings of IEEE International Conference on Control Automation, Robotics & Vision, Singapore, Singapore, pp. 85–89.CrossRefGoogle Scholar
Casanova, JJ, Low, ZN, Lin, J and Tseng, R (2009) Transmitting coil achieving uniform magnetic field distribution for planar wireless power transfer system. Proceedings of IEEE Radio and Wireless Symposium, San Diego, CA, USA, pp. 530–533.CrossRefGoogle Scholar
Wireless Power Consortium (2017) The qi Wireless Power transfer system power class 0 specification, v1.2.3, Parts 1 and 2: interface definitions.Google Scholar
Galizzi, M, Caldara, M, Re, V and Vitali, A (2013) A novel qi-standard compliant full-bridge wireless power charger for low power devices. Proceedings of IEEE WPT, Perugia, Italy, pp. 44–47.Google Scholar
Waffenschmidt, E (2011) Wireless power for mobile devices. Proceedings of IEEE INTELEC, Amsterdam, Netherlands, pp. 1–9.Google Scholar
Abouzeid, MO and Tekin, A (2017) Adaptive 6.78-MHz ISM band wireless charging for small form factor receivers. Proceedings of IEEE ISCAS, Baltimore, MD, USA, pp. 1–4.Google Scholar
Park, Y-J, Jang, B, Park, S-M, Ryu, H-C, Oh, SJ, Kim, S-Y, Pu, Y, Yoo, S-S, Hwang, KC, Yang, Y, Lee, M and Lee, K-Y (2018) A triple-mode wireless power-receiving unit with 85.5% system efficiency for a4wp, wpc, and pma applications. IEEE Transactions on Power Electronics 33, 3141–3156.CrossRefGoogle Scholar
Johns, B, Antonacci, T and Siddabattula, K (2012) Designing a qi-compliant receiver coil for wireless power systems, part1, TI. [Online] Available at https://www.mouser.com/pdfDocs/TI-Designing-a-Qi-compliant-receiver-coil.pdf.Google Scholar
Chen, MX and Cheng, KWE (2017) Design of flat magnetic core for inductively coupled coils in high efficiency wireless power transfer application. Proceedings of International Conference PESA-Smart Mobility, Power Transfer & Security, Hong Kong, China, pp. 1–7.Google Scholar
Campi, T and Feliziani, SCM (2014) Magnetic shielding of wireless power transfer systems. Proceedings of International Symposium EMC, Tokyo, Japan, pp. 422–425.Google Scholar
Ahn, D, Kim, S, Kim, S-W, Moon, J and Cho, I (2017) Wireless power transmitter and receiver supporting 200-kHz and 6.78-MHz dual-band operation without magnetic field canceling. IEEE Transactions on Power Electronics 32, 7068–7082.CrossRefGoogle Scholar
Zhao, C and Costinett, D (2017) Gan based dual-mode wireless power transfer using multifrequency programmed pulse width modulation. IEEE Transactions on Industrial Electronics 64, 9165–9176.CrossRefGoogle Scholar
Riehl, PS, Satyamoorthy, A, Akram, H, Yen, Y-C, Yang, J-C, Juan, B, Lee, C-M, Lin, F-C, Muratov, V, Plumb, W and Tustin, PF (2015) Wireless power systems for mobile devices supporting inductive and resonant operating modes. IEEE Transactions on Microwave Theory and Techniques 63, 780–790.CrossRefGoogle Scholar
Rooij, M and Zhang, Y (2016) A 10 W multi-mode capable wireless power amplifier for mobile devices. Proceedings of IEEE PCIM, Shangai, China, China, pp. 1–8.Google Scholar
Burket, C (2017) Wireless charging opportunities and challenges for wearables: one size does not fit all. IEEE Power Electronics Magazine 4, 53–57..CrossRefGoogle Scholar
Roshan, YM and Park, EJ (2017) Design approach for a wireless power transfer system for wristband wearable devices. IET Power Electronics 10, 931–937.Google Scholar
Cannon, BL, Hoburg, JF, Stancil, DD and Goldstein, SC (2009) Magnetic resonant coupling as a potential means for wirelesspower transfer to multiple small receivers. IEEE Transactionson Power Electronics 24, 1819–1825.CrossRefGoogle Scholar
Li, X, Zhang, H, Peng, F, Li, Y, Yang, T, Wang, B and Fang, D (2012) A wireless magnetic resonance energy transfer system for microimplantable medical sensors. Sensors 12, 10292–10308.CrossRefGoogle Scholar
Ezzulddin, AS and Ibraheem, AA (2017) Design and optimization of printed spiral coils used in wireless power transmission systems for powering 10 mm2 receiver size at 13.56 MHz operating frequency. International Journal of Current Engineering and Technology 7, 1835–1841.Google Scholar
Jow, U and Ghovanloo, M (2009) Modeling and optimization of printed spiral coils in air, saline, and muscle tissue environments. IEEE transactions on Biomedical Circuits and Systems 3, 339–347.Google Scholar
Ko, WH, Liang, SP and Fung, CDF (1977) Design of radio frequency coils for implant instruments. Medical & Biological Engineering & Computing Journal, 634–640.Google Scholar