Proposal of Wide‐Area Sensing in Wireless Charging System via Magnetic Resonance Coupling

SUMMARY Recently, wireless charging via magnetic resonance coupling has gained attention because it has the potential of efficient midrange wireless charging. Here, functions such as sensing at the transmitter and wireless communication from the target are the essential elements to realize a standard wireless charging system. Currently, the sensing and communication protocol of the hardware (i.e., the high-frequency power source and antenna configuration) compatible with wireless charging is gaining attention in terms of its cost and space reduction due to the use of common components for multiple functions. However, this protocol has the problem of narrow effective areas due to the fact that the sensing range depends on the fixed Q factor of the antenna. To overcome this problem, the concept of wide-area sensing based on a Q controllable antenna is proposed, and the effectiveness is verified through a theoretical analysis and an experiment. As a result, it is clarified that the effective area can be expanded up to a ratio of the distance g between the transmitting and receiving antennas to the inner diameter d of the antenna g/d = 5.0.

[1]  Takehiro Imura,et al.  Coupling Coefficients Estimation of Wireless Power Transfer System via Magnetic Resonance Coupling Using Information From Either Side of the System , 2015, IEEE Journal of Emerging and Selected Topics in Power Electronics.

[2]  F. Raab,et al.  Magnetic Position and Orientation Tracking System , 1979, IEEE Transactions on Aerospace and Electronic Systems.

[3]  T. Someya,et al.  A large-area wireless power-transmission sheet using printed organic transistors and plastic MEMS switches. , 2007, Nature materials.

[4]  Zhengming Zhao,et al.  Frequency Decrease Analysis of Resonant Wireless Power Transfer , 2014, IEEE Transactions on Power Electronics.

[5]  Paul Lukowicz,et al.  Adapting magnetic resonant coupling based relative positioning technology for wearable activitiy recogniton , 2008, 2008 12th IEEE International Symposium on Wearable Computers.

[6]  Kazuya Takeda,et al.  Laser Energy Transmission for a Wireless Energy Supply to Robots , 2005 .

[7]  Peter Spies,et al.  An Overview of Technical Challenges and Advances of Inductive Wireless Power Transmission , 2013, Proceedings of the IEEE.

[8]  Hideki Hashimoto,et al.  Proposal and Error Evaluation of Distance Sensor Based on Magnetic Resonance Coupling , 2012 .

[9]  T. P. Duong,et al.  Experimental Results of High-Efficiency Resonant Coupling Wireless Power Transfer Using a Variable Coupling Method , 2011, IEEE Microwave and Wireless Components Letters.

[10]  Ville Viikari,et al.  Ranging of UHF RFID Tag Using Stepped Frequency Read-Out , 2010, IEEE Sensors Journal.

[11]  Eberhard Waffenschmidt,et al.  Wireless power for mobile devices , 2011, 2011 IEEE 33rd International Telecommunications Energy Conference (INTELEC).

[12]  J.P. How,et al.  Signal architecture for a distributed magnetic local positioning system , 2004, IEEE Sensors Journal.

[13]  Xun Liu,et al.  Simulation Study and Experimental Verification of a Universal Contactless Battery Charging Platform With Localized Charging Features , 2007, IEEE Transactions on Power Electronics.

[14]  S.C. Goldstein,et al.  Magnetic Resonant Coupling As a Potential Means for Wireless Power Transfer to Multiple Small Receivers , 2009, IEEE Transactions on Power Electronics.

[15]  Hideki Hashimoto,et al.  Error Characteristics of Passive Position Sensing via Coupled Magnetic Resonances Assuming Simultaneous Realization With Wireless Charging , 2015, IEEE Sensors Journal.

[16]  Grant Covic,et al.  A Bipolar Pad in a 10-kHz 300-W Distributed IPT System for AGV Applications , 2014, IEEE Transactions on Industrial Electronics.

[17]  Alanson P. Sample,et al.  Analysis , Experimental Results , and Range Adaptation of Magnetically Coupled Resonators for Wireless Power Transfer , 2010 .

[18]  Hideki Hashimoto,et al.  Efficient Wireless Power Transmission Based on Position Sensing Using Magnetic Resonance Coupling , 2012 .

[19]  Philip Heng Wai Leong,et al.  Handwriting tracking based on coupled μIMU/electromagnetic resonance motion detection , 2007, 2007 IEEE International Conference on Robotics and Biomimetics (ROBIO).

[20]  D. S. Ricketts,et al.  Passive Magnetoquasistatic Position Measurement Using Coupled Magnetic Resonances , 2013, IEEE Antennas and Wireless Propagation Letters.

[21]  Mauro Mongiardo,et al.  A Simple Ranging System Based on Mutually Coupled Resonating Circuits , 2013, IEEE Transactions on Instrumentation and Measurement.

[22]  Gyuhae Park,et al.  RF Energy Transmission for a Low-Power Wireless Impedance Sensor Node , 2009, IEEE Sensors Journal.

[23]  Ron Shu-Yuen Hui,et al.  Planar Wireless Charging Technology for Portable Electronic Products and Qi , 2013, Proceedings of the IEEE.

[24]  Hai-Won Yang,et al.  Navigation of automated guided vehicles using magnet spot guidance method , 2012 .

[25]  M. Soljačić,et al.  Wireless Power Transfer via Strongly Coupled Magnetic Resonances , 2007, Science.