Abstract：In order to meet the requirements of power and communication in equipment, simultaneous wireless power and information transmission (SWPIT) technology has developed rapidly in recent years. This method can greatly enhance the abilities of mobility and intelligence for modern electronic devices, especially for implantable medical devices and autonomous navigation equipment. There are many SWPIT solutions for different applications, and different solutions have their advantages, such as communication speed and capacity, and the effect of communication on wireless power transfer. However, for the medium with high conductivity or dielectric constant, a suitable SWPIT solution with low carrier frequency is necessary to reduce the channel power losses. This paper proposes the dual-resonant loops on the receiver side: the wireless power receiving loop with resonant frequency fp and the signal receiving loop with resonant frequency fp/3, respectively. On the transmitter side, a full bridge converter is used to produce a triangular current in a transmitter coil, and the current frequency is controlled by driving signals. Based on the frequency and phase-shifted control, the proposed full bridge inverter mainly contains two states. First state, if the system needs to transfer wireless power only, the working frequency of the inverter is fp. Since the frequency of the fundamental component of the current is also fp and equal to the resonance frequency in the receiver coil, the system has the highest efficiency and power transfer ability. The energy received by the signal loop can be treated as zero. Second state, if the system needs to transfer wireless power and information simultaneously, the frequency of the inverter is fp/3. The fundamental component of fp/3 is used to transmit information, and the third harmonic frequency fp is used to transfer wireless power. Thus, the carrier frequency for communications is fp/3. The power in the third harmonic component is relatively small compared to the first state. Based on the analysis of the proposed method, the phase angles of 0 and 120 are used to modulate the fundamental component. By modulating the phase-shifted angle, the amplitude in the receiving signal loop has a larger value at the angle of 0 than that at the angle of 120. Theoretically, the selected phase angles only affect the amplitude of the fundamental component without affecting the 3rd harmonic component. Therefore, the effect of communication on the fluctuation of wireless power transfer is relatively small. The shortcoming is that wireless power transfer is only 1/3 of full power. The proposed method can realize SWPIT based on the full bridge inverter only. Based on the proposed topology and circuit parameters, the working features of the system under different conditions are discussed. The interference between power transfer and signal transmission is modeled, and the ranges of phase-shifted and the parameters in the signal detection circuit are determined. Since the working frequency of the inverter has a low-frequency carrier for communication, the proposed method has obvious advantages for the high conductivity medium, such as the ocean.
华超, 周岩, 胡震, 朱建鑫. 基于移相调制的无线供电与信息协同传输技术[J]. 电工技术学报, 2023, 38(16): 4233-4245.
Hua Chao, Zhou Yan, Hu Zhen, Zhu Jianxin. Simultaneous Wireless Power and Information Transmission Method Based on Phase-Shifted Modulation. Transactions of China Electrotechnical Society, 2023, 38(16): 4233-4245.
[1] 薛明, 杨庆新, 章鹏程, 等. 无线电能传输技术应用研究现状与关键问题[J]. 电工技术学报, 2021, 36(8): 1547-1568. Xue Ming, Yang Qingxin, Zhang Pengcheng, et al.Application status and key issues of wireless power transmission technology[J]. Transactions of China Electrotechnical Society, 2021, 36(8): 1547-1568. [2] 程时杰, 陈小良, 王军华, 等. 无线输电关键技术及其应用[J]. 电工技术学报, 2015, 30(19): 68-84. Cheng Shijie, Chen Xiaoliang, Wang Junhua, et al.Key technologies and applications of wireless power transmission[J]. Transactions of China Electrotech- nical Society, 2015, 30(19): 68-84. [3] Varshney L R.Transporting information and energy simultaneously[C]//IEEE International Symposium on Information Theory, Toronto, ON, Canada, 2008: 1612-1616. [4] 崔淑梅, 宋贝贝, 王志远. 电动汽车动态无线供电磁耦合机构研究综述[J]. 电工技术学报, 2022, 37(3): 537-554. Cui Shumei, Song Beibei, Wang Zhiyuan.Overview of magnetic coupler for electric vehicles dynamic wireless charging[J]. Transactions of China Electro- technical Society, 2022, 37(3): 537-554. [5] Sheng Xuerui, Shi Liming.Mutual inductance and load identification method for inductively coupled power transfer system based on auxiliary inverter[J]. IEEE Transactions on Vehicular Technology, 2020, 69(2): 1533-1541. [6] 夏晨阳, 任思源, 陈锐, 等. 基波—谐波双通路并行感应式能量与信号同步传输技术[J]. 电力系统自动化, 2018, 42(5): 169-175. Xia Chenyang, Ren Siyuan, Chen Rui, et al.Inductive power and signal synchronous transmission based on parallel paths of fundamental wave and harmonic wave[J]. Automation of Electric Power Systems, 2018, 42(5): 169-175. [7] Zhou Yan, Zhu Xiang, Lin Wu, et al.Study of wire- less power and information transmission technology based on the triangular current waveform[J]. IEEE Transactions on Power Electronics, 2018, 33(2): 1368-1377. [8] Zhou Yan, Ma Chongyuan, Zhang Zijian, et al.Rede- fining the channel bandwidth for simultaneous wireless power and information transfer[J]. IEEE Transactions on Industrial Electronics, 2022, 69(7): 6881-6891. [9] 王佩月, 左志平, 孙跃, 等. 基于双侧LCC的全双工无线电能传输能量信号并行传输系统[J]. 电工技术学报, 2021, 36(23): 4981-4991. Wang Peiyue, Zuo Zhiping, Sun Yue, et al.Full- duplex simultaneous wireless power and data transfer system based on double-sided LCC topology[J]. Transactions of China Electrotechnical Society, 2021, 36(23): 4981-4991. [10] Sun Yue, Yan Pengxu, Wang Zhihui, et al.The parallel transmission of power and data with the shared channel for an inductive power transfer system[J]. IEEE Transactions on Power Electronics, 2016, 31(8): 5495-5502. [11] He Xiangning, Wang Ruichi, Wu Jiande, et al.Nature of power electronics and integration of power conversion with communication for talkative power[J]. Nature Communications, 2020, 11(1): 1-12. [12] Wu Jiande, Zhao Chongwen, Lin Zhengyu, et al.Wireless power and data transfer via a common inductive link using frequency division multiple- xing[J]. IEEE Transactions on Industrial Electronics, 2015, 62(12): 7810-7820. [13] Zhou Yan, Lin Wu, Wang Baoyun.High-efficiency coupling-insensitive wireless power and information transmission based on the phase-shifted control[J]. IEEE Transactions on Power Electronics, 2018, 33(9): 7821-7831. [14] Yoshioka D, Sakamoto H, Ishihara Y, et al.Power feeding and data-transmission system using magnetic coupling for an ocean observation mooring buoy[J]. IEEE Transactions on Magnetics, 2007, 43(6): 2663-2665. [15] Cai Hua, Shi Liming, Li Yaohua.Harmonic-based phase-shifted control of inductively coupled power transfer[J]. IEEE Transactions on Power Electronics, 2014, 29(2): 594-602. [16] Xia Chenyang, Jia Renhai, Shi Yuntong, et al.Simultaneous wireless power and information transfer based on phase-shift modulation in ICPT system[J]. IEEE Transactions on Energy Conversion, 2021, 36(2): 629-639.
2023, Vol. 38 
