Abstract：In this paper,the power distribution in the near-field of a magnetic dipole and the proportion its reactive power are obtained to estimate the optimum operating range of the wireless power transmission (WPT) system.Secondly,a general resonant coupling power transmission (RCPT) system is analyzed with thecoupled mode theory.The transferred power can be expressed asthe function of the quality factor,the coupling coefficient,and the angular frequency.For verification,a RCPT system composed of planar resonators is fabricated.It is shown by the measured results that,the maximum transmission distance is up to 5 m at about 10 MHz,which is an evident proof for the correctness of the proposed theory.
张献,苑朝阳,章鹏程,杨庆新,李阳. 基于电磁谐振耦合的无线电能传输系统传输能力估算与验证[J]. 电工技术学报, 2015, 30(19): 47-54.
Zhang Xian, Yuan Zhaoyang, Zhang Pengcheng, Yang Qingxin, Li Yang. Transmitting Capacity Estimation and Verification for Wireless Power Transmission System via Electromagnetic Resonant Coupling. Transactions of China Electrotechnical Society, 2015, 30(19): 47-54.
[1] Zhang Xian,Su Hang,Zhang Pengcheng,et al.Modeling and validation for electromagnetic mechanical synchronous resonance via wireless power transmission[J].IEEE Transactions on Magnetics,2015,51(3):1-4. [2] Yang Qingxin,Zhang Xian,Chen Haiyan,et al.Direct field-circuit coupled analysis and corresponding experiments of electromagnetic resonant coupling system[J].IEEE Transactions on Magnetics,2012,48(11):3961-3964. [3] Mayordomo Iker,Drager Tobias,Spies Peter,et al.An overview of technical challenges and advances of inductive wireless power transmission[J].Proceedings of the IEEE,2013,101(6):1302-1311. [4] Sample A P,Meyer D A,Smith J R.Analysis,experimental results,and range adaptation of magnetically coupled resonators for wireless power transfer[J].IEEE Transactions on Industrial Electronics,2011,58(2):544-554. [5] Popovic Zoya,Falkenstein Erez Avigdor,Costinett Daniel,et al.Low-power far-field wireless powering for wireless sensors[J].Proceedings of the IEEE,2013,101(6):1397-1409. [6] Choi Jun-Han,Yeo Sung-Ku,Park Seho,et al.Resonant regulating rectifiers (3R) operating for 6.78 MHz resonant wireless power transfer (RWPT)[J].IEEE Journal of Solid-State Circuits,2013,48(12):2989-3001. [7] Ahn Dukju,Hong Songcheol.A study on magnetic field repeater in wireless power transfer[J].IEEE Transactions on Industrial Electronics,2013,60(1):360-371. [8] Jiang Shan,Georgakopoulos Stavros V.Optimum wireless powering of sensors embedded in concrete[J].IEEE Transactions on Antennas and Propagation,2012,60(2):1106-1113. [9] Jonah Olutola,Georgakopoulos Stavros V.Wireless power transfer in concrete via strongly coupled magnetic resonance[J].IEEE Transactions on Antennas and Propagation,2013,61(3):1378-1384. [10]Beh Teck Chuan,Kato Masaki,Imura Takehiro,et al.Automated impedance matching system for robust wireless power transfer via magnetic resonance coupling[J].IEEE Transactions on Industrial Electronics,2013,60(9):3689-3698. [11]Kurs André,Karalis Aristeidis,Moffatt Robert,et al.Wireless power transfer via strongly coupled magnetic resonances[J].Science,2007,317(5834):83-86. [12]Karalis Aristeidis,Joannopoulos J D.Soljacic marin efficient wireless non-radiative mid-range energy transfer[J].Annals of PhysicsJanuary Special Issue,2008,2008,323(1):34-48. [13]Sasabe K,Bullivant A,Duerr J H,et al.Far-field prediction method from near-field measurement[C].Proceeding International of Wroclaw International Symposium,1996:445-449. [14]Gordon W B.Near Field Calculations with Far Field Formulas[C].Antennas and Propagation Society International Symposium,1996,2:950-953. [15]Capps C.Near field or far field[J].Engineering,Electrical & Electronic,2001,46(18):95. [16]Streifer W.Coupled mode theory[J].Electronics Letters,1987,23(7):315-316. [17]Haus H A,Huang W.Coupled-mode theory[J].Proceedings of the IEEE,1991,79(10):1505-1518. [18]Kiani Mehdi,Ghovanloo Maysam.The circuit theory behind coupled-mode magnetic resonance-based wireless power transmission[J].IEEE Transactions on Circuits and Systems I:Regular Papers,2012,59(9):2065-2074. [19]A Linear Amplifier (1.6~28 MHz) for 8 W PEP in class-A with the BLF175[EB/OL].www.nxp.com/documents/application_note/NCO8705.pdf.
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