Enabling multi-angle wireless power transmission via magnetic resonant coupling

Magnetic resonant coupling is more efficient than radiative transfer to transfer power wirelessly over a medium distance. Current implementation of magnetic resonant coupling, however, requires paired source and receiver antennas in exactly matched positions. We present an open-ended resonant coupling system with multiple orthogonal receivers or source antennas to solve the resonant frequency splitting issues that arise in multiple receiver applications and maintain a relative high efficiency. It is shown in the system that power is received by the receiver working around a magnetic resonance frequency, which is in different directions to the source coils. Better transfer efficiencies are observed for orthogonal source coils compared with inductive coupling as well as magnetic resonant coupling with paired single receiver and source antennas.

[1]  S. M. Rathjen,et al.  Microwave Power Beaming for Long Range Energy Transfer , 1978, 1978 8th European Microwave Conference.

[2]  William C. Brown,et al.  The History of Power Transmission by Radio Waves , 1984 .

[3]  H. Ling,et al.  Investigation of Near-Field Wireless Power Transfer Under Multiple Transmitters , 2011, IEEE Antennas and Wireless Propagation Letters.

[4]  M. Soljačić,et al.  Efficient wireless non-radiative mid-range energy transfer , 2006, physics/0611063.

[5]  D. Pozar.  Microwave Engineering , 1990 .

[6]  Naoki Shinohara,et al.  Assessment Study of Electric Vehicle Charging System with Microwave Power Transmission II , 2007 .

[7]  Jong-Moo Lee,et al.  Circuit-Model-Based Analysis of a Wireless Energy-Transfer System via Coupled Magnetic Resonances , 2011, IEEE Transactions on Industrial Electronics.

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

[9]  N. Kawashima.  The Importance of the Development of a Rover for the Direct Confirmation of the Existence of Ice on the Moon , 2000 .

[10]  Jenshan Lin,et al.  A Loosely Coupled Planar Wireless Power System for Multiple Receivers , 2009, IEEE Transactions on Industrial Electronics.

[11]  Bo-Hyung Cho,et al.  An energy transmission system for an artificial heart using leakage inductance compensation of transcutaneous transformer , 1996 .

[12]  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.

[13]  Sungwoo Lee,et al.  High performance inductive power transfer system with narrow rail width for On-Line Electric Vehicles , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[14]  Arianna Menciassi,et al.  Wireless capsule endoscopy: from diagnostic devices to multipurpose robotic systems , 2007, Biomedical microdevices.

[15]  Bo-Hyung Cho,et al.  Design of a contactless battery charger for cellular phone , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).