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学者姓名：江彦伟
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Abstract ：
A capacitive wireless power transfer (CPT) system based on parity–time (PT) symmetry achieves constant output characteristics under distance variation without additionally increasing the system complexity of the control strategy, where the concept of PT symmetry is derived from quantum mechanics, and the systems satisfying PT symmetry are invariant under space and time inversion. However, the exact PT-symmetric region (i.e., strong coupling region) of the general system is limited by the symmetry of the structure and parameters. To overcome this limitation, a novel generalized parity–time (GPT)-symmetric CPT system is proposed in this article. According to the equivalent circuit method, the circuit model of the proposed system is built, and the transfer characteristics are analyzed. Furthermore, a prototype is implemented to verify the feasibility of the proposed CPT system. The results show that the PT-symmetric region is extended by 169.23% compared with the traditional PT-based CPT system, and a constant output power of 21.5 W is transferred with a constant transfer efficiency of 90%. © 2024 by the authors.
Keyword ：
capacitive wireless power transfer (CPT) capacitive wireless power transfer (CPT) distance extension distance extension generalized parity–time (GPT) symmetry generalized parity–time (GPT) symmetry
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| GB/T 7714 | Shu, X. , Ou, R. , Wu, G. et al. Extended-Distance Capacitive Wireless Power Transfer System Based on Generalized Parity–Time Symmetry [J]. | Electronics (Switzerland) , 2024 , 13 (23) . |
| MLA | Shu, X. et al. "Extended-Distance Capacitive Wireless Power Transfer System Based on Generalized Parity–Time Symmetry" . | Electronics (Switzerland) 13 . 23 (2024) . |
| APA | Shu, X. , Ou, R. , Wu, G. , Yang, J. , Jiang, Y. . Extended-Distance Capacitive Wireless Power Transfer System Based on Generalized Parity–Time Symmetry . | Electronics (Switzerland) , 2024 , 13 (23) . |
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Capacitive power transfer (CPT) technique uses coupled metal plates for energy transmission, which has the advantages of negligible eddy-current loss and low weight. To achieve efficient power transfer, CPT system often adopts circuit resonance and impedance compensation, which are generally realized by integer-order components, such as inductors and capacitors. However, it remains a fundamental challenge to create a CPT system whose transfer efficiency and output power are robust against the variation of resonant frequency and the coupled plates’ relative position. Therefore, this paper proposes a robust fractional-order autonomous CPT system containing a fractional-order inductor. Theoretical analysis shows that the transfer efficiency and output power of the proposed fractional-order CPT system are inherently robust not only to the variation of the coupled plates’ relative position but also to the resonant frequency. In contrast, the transfer efficiency and output power of traditional integer-order CPT systems are sensitive to the resonant frequency. The available experimental results verify the effectiveness of the proposed system. IEEE
Keyword ：
Autonomous Autonomous Capacitive power transfer Capacitive power transfer Capacitors Capacitors Couplings Couplings Fractional-order Fractional-order Inductors Inductors Receivers Receivers Resonant frequency Resonant frequency RLC circuits RLC circuits Robust transmission Robust transmission Transmitters Transmitters
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| GB/T 7714 | Jiang, Y. , Zhou, Y. , Zhang, B. et al. A Robust Capacitive Power Transfer System via Fractional-order Autonomous Circuit [J]. | IEEE Journal of Emerging and Selected Topics in Power Electronics , 2024 , 12 (3) : 1-1 . |
| MLA | Jiang, Y. et al. "A Robust Capacitive Power Transfer System via Fractional-order Autonomous Circuit" . | IEEE Journal of Emerging and Selected Topics in Power Electronics 12 . 3 (2024) : 1-1 . |
| APA | Jiang, Y. , Zhou, Y. , Zhang, B. , Chen, W. , Chen, Q. , Shu, X. . A Robust Capacitive Power Transfer System via Fractional-order Autonomous Circuit . | IEEE Journal of Emerging and Selected Topics in Power Electronics , 2024 , 12 (3) , 1-1 . |
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Abstract ：
Capacitive power transfer (CPT) technique uses coupled metal plates for energy transmission, which has the advantages of negligible eddy-current loss and low weight. To achieve efficient power transfer, the CPT system often adopts circuit resonance and impedance compensation, which are generally realized by integer-order components, such as inductors and capacitors. However, it remains a fundamental challenge to create a CPT system whose transfer efficiency and output power are robust against the variation of resonant frequency and the coupled plates' relative position. Therefore, this article proposes a robust fractional-order autonomous CPT system containing a fractional-order inductor. Theoretical analysis shows that the transfer efficiency and output power of the proposed fractional-order CPT system are inherently robust not only to the variation of the coupled plates' relative position but also to the resonant frequency. In contrast, the transfer efficiency and output power of traditional integer-order CPT systems are sensitive to the resonant frequency. The available experimental results verify the effectiveness of the proposed system.
Keyword ：
Autonomous Autonomous capacitive power transfer (CPT) capacitive power transfer (CPT) Capacitors Capacitors Couplings Couplings fractional order fractional order Inductors Inductors Receivers Receivers Resonant frequency Resonant frequency RLC circuits RLC circuits robust transmission robust transmission Transmitters Transmitters
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| GB/T 7714 | Jiang, Yanwei , Zhou, Yang , Zhang, Bo et al. A Robust Capacitive Power Transfer System via Fractional-Order Autonomous Circuit [J]. | IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS , 2024 , 12 (3) : 3258-3267 . |
| MLA | Jiang, Yanwei et al. "A Robust Capacitive Power Transfer System via Fractional-Order Autonomous Circuit" . | IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS 12 . 3 (2024) : 3258-3267 . |
| APA | Jiang, Yanwei , Zhou, Yang , Zhang, Bo , Chen, Wei , Chen, Qingbin , Shu, Xujian . A Robust Capacitive Power Transfer System via Fractional-Order Autonomous Circuit . | IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS , 2024 , 12 (3) , 3258-3267 . |
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Abstract ：
A capacitive wireless power transfer (CPT) system based on parity-time (PT) symmetry achieves constant output characteristics under distance variation without additionally increasing the system complexity of the control strategy, where the concept of PT symmetry is derived from quantum mechanics, and the systems satisfying PT symmetry are invariant under space and time inversion. However, the exact PT-symmetric region (i.e., strong coupling region) of the general system is limited by the symmetry of the structure and parameters. To overcome this limitation, a novel generalized parity-time (GPT)-symmetric CPT system is proposed in this article. According to the equivalent circuit method, the circuit model of the proposed system is built, and the transfer characteristics are analyzed. Furthermore, a prototype is implemented to verify the feasibility of the proposed CPT system. The results show that the PT-symmetric region is extended by 169.23% compared with the traditional PT-based CPT system, and a constant output power of 21.5 W is transferred with a constant transfer efficiency of 90%.
Keyword ：
capacitive wireless power transfer (CPT) capacitive wireless power transfer (CPT) distance extension distance extension generalized parity-time (GPT) symmetry generalized parity-time (GPT) symmetry
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| GB/T 7714 | Shu, Xujian , Ou, Riming , Wu, Guoxin et al. Extended-Distance Capacitive Wireless Power Transfer System Based on Generalized Parity-Time Symmetry [J]. | ELECTRONICS , 2024 , 13 (23) . |
| MLA | Shu, Xujian et al. "Extended-Distance Capacitive Wireless Power Transfer System Based on Generalized Parity-Time Symmetry" . | ELECTRONICS 13 . 23 (2024) . |
| APA | Shu, Xujian , Ou, Riming , Wu, Guoxin , Yang, Jingjing , Jiang, Yanwei . Extended-Distance Capacitive Wireless Power Transfer System Based on Generalized Parity-Time Symmetry . | ELECTRONICS , 2024 , 13 (23) . |
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In this paper, using dual-frequency modulation (DFM) and phase synchronization method (PSM), a flexible and controllable wireless power transfer (WPT) system with soft switching based on parity-time (PT) symmetry is proposed for kitchen appliances. Here, the system outputs can be regulated by configuring the number ratio of two modulation pulses with different frequencies, without the need for extra DC-DC converters or changing the duty cycle of the inverter. Moreover, a control method for generating and arranging the hybrid frequencies pulse sequence is proposed based on PSM to satisfy the condition of PT symmetry. Theoretical analysis indicates that a controllable output power insensitive to the coupling coefficient can be acquired only by relying on a single-stage inverter while maintaining soft-switching or zero-voltage switching (ZVS) operation, thereby reducing power losses and improving system cost-effectiveness and integration. Furthermore, dual-side communication can be eliminated. The results of the experiment confirm that a controllable stable output power with a constant coil-coil efficiency of 95.8% and a peak DC-to-load efficiency of 93.8% can be maintained within a lateral tolerance range of 0-14 cm.
Keyword ：
Coils Coils controllable output controllable output Control systems Control systems Couplings Couplings Dual-frequency modulation (DFM) Dual-frequency modulation (DFM) Heating systems Heating systems Inverters Inverters parity-time (PT) symmetry parity-time (PT) symmetry Power generation Power generation Receivers Receivers Resistors Resistors soft switching soft switching Transmitters Transmitters Zero voltage switching Zero voltage switching
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| GB/T 7714 | Wu, Lihao , Zhang, Bo , Jiang, Yanwei . Output-Power-Controllable Parity-Time-Symmetric Wireless Power Transfer System With Soft Switching for Kitchen Appliances [J]. | IEEE TRANSACTIONS ON CONSUMER ELECTRONICS , 2024 , 70 (4) : 6630-6640 . |
| MLA | Wu, Lihao et al. "Output-Power-Controllable Parity-Time-Symmetric Wireless Power Transfer System With Soft Switching for Kitchen Appliances" . | IEEE TRANSACTIONS ON CONSUMER ELECTRONICS 70 . 4 (2024) : 6630-6640 . |
| APA | Wu, Lihao , Zhang, Bo , Jiang, Yanwei . Output-Power-Controllable Parity-Time-Symmetric Wireless Power Transfer System With Soft Switching for Kitchen Appliances . | IEEE TRANSACTIONS ON CONSUMER ELECTRONICS , 2024 , 70 (4) , 6630-6640 . |
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In wireless power transfer (WPT) systems, it is well known that the series-parallel (SP)-compensated topology is preferable for large load systems, like biomedical implants and consumer electronics, etc. However, it is a major challenge for practical SP-compensated WPT applications to obtain efficient and stable power transfer characteristics under the variations of coupling coefficient and resonant frequency. Therefore, based on fractional-order (FO) circuit theory, this paper proposes an SP-compensated FOWPT system with coupling independence and detuning insensitivity. Experimental results show that stable output power is maintained with a constant transfer efficiency in a wide load range, and when the resonant frequency of the receiver is detuned +/- 5%, the fluctuations of output power and transfer efficiency are less than 1%. The experiment validates the effectiveness of the proposed system.
Keyword ：
Coupling independence Coupling independence detuning insensitivity detuning insensitivity fractional-order wireless power transfer (FOWPT) fractional-order wireless power transfer (FOWPT) series- parallel (SP) series- parallel (SP)
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| GB/T 7714 | Shu, Xujian , Wu, Guoxin , Zhang, Xueqi et al. A Series-Parallel-Compensated Fractional-order Wireless Power Transfer System With Coupling Independence and Detuning Insensitivity [J]. | IEICE ELECTRONICS EXPRESS , 2024 , 21 (17) . |
| MLA | Shu, Xujian et al. "A Series-Parallel-Compensated Fractional-order Wireless Power Transfer System With Coupling Independence and Detuning Insensitivity" . | IEICE ELECTRONICS EXPRESS 21 . 17 (2024) . |
| APA | Shu, Xujian , Wu, Guoxin , Zhang, Xueqi , Jiang, Yanwei , Zhang, Bo . A Series-Parallel-Compensated Fractional-order Wireless Power Transfer System With Coupling Independence and Detuning Insensitivity . | IEICE ELECTRONICS EXPRESS , 2024 , 21 (17) . |
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电场耦合无线电能传输ECPT(electric-field coupled wireless power transfer)系统具有耦合极板轻便、跨金属传能、涡流损耗可忽略等优点.其中,宇称-时间对称电场耦合无线电能传输PT-ECPT(parity-time symmetric ECPT)系统具有在耦合极板间距发生变化时保持恒定输出的特性,具有广泛的应用前景.基于此,研究了PT-ECPT系统的电场辐射分布.理论分析、仿真及实验结果表明,在强耦合区域且输出功率相同的情况下,PT-ECPT系统的电场分布在耦合系数较小时比传统的谐振式ECPT系统更为集中,使得PT-ECPT在小耦合系数时安全性更高.
Keyword ：
宇称-时间对称 宇称-时间对称 无线电能传输系统 无线电能传输系统 电场分布 电场分布 电场泄露 电场泄露 电场耦合 电场耦合
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| GB/T 7714 | 郑小瑶 , 江彦伟 , 疏许健 et al. 宇称-时间对称电场耦合无线电能传输系统电场分布特性研究 [J]. | 电源学报 , 2024 , 22 (5) : 60-66 . |
| MLA | 郑小瑶 et al. "宇称-时间对称电场耦合无线电能传输系统电场分布特性研究" . | 电源学报 22 . 5 (2024) : 60-66 . |
| APA | 郑小瑶 , 江彦伟 , 疏许健 , 周阳 , 赵小光 . 宇称-时间对称电场耦合无线电能传输系统电场分布特性研究 . | 电源学报 , 2024 , 22 (5) , 60-66 . |
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This paper proposes a distance-independent wireless charging system that achieves constant current (CC) and constant voltage (CV) output through utilization of a reconfigurable topology, capable of seamlessly switching between a two-coil and a three-coil configuration. In order to enhance output adjustability and improve the efficiency of the charging process, this system combines the advantages of fractional-order and integer-order resonant circuits. In the two-coil configuration, the output of the inverter on the transmitter side is modulated as that of a fractional-order capacitor. By analyzing frequency characteristics of the fractional-order circuit, a control strategy of variable fractional order is introduced to achieve CC output against variations of transfer distance based on a mutual inductance recognition method. After transitioning to the three-coil configuration, the system inherently achieves a CV output by operating the inverter at a fixed frequency and forming an integer-order resonant circuit. In addition, in both mentioned configurations, the full-bridge (FB) mode and half-bridge (HB) mode of the inverter are utilized to minimize switching losses and broaden the range of soft-switching operation, catering to various load conditions. Finally, an experimental prototype is built to achieve CC and CV output within a wide charging range.
Keyword ：
Constant current/voltage (CC/CV) charging Constant current/voltage (CC/CV) charging hybrid topology hybrid topology reconfigurable reconfigurable wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Rong, Chao , Zhang, Bo , Jiang, Yanwei et al. A Distance-Independent Wireless Charging System With Hybrid Topology and Control [J]. | PROCEEDINGS OF 2024 IEEE WIRELESS POWER TECHNOLOGY CONFERENCE AND EXPO, WPTCE , 2024 : 821-824 . |
| MLA | Rong, Chao et al. "A Distance-Independent Wireless Charging System With Hybrid Topology and Control" . | PROCEEDINGS OF 2024 IEEE WIRELESS POWER TECHNOLOGY CONFERENCE AND EXPO, WPTCE (2024) : 821-824 . |
| APA | Rong, Chao , Zhang, Bo , Jiang, Yanwei , Zhou, Jiali . A Distance-Independent Wireless Charging System With Hybrid Topology and Control . | PROCEEDINGS OF 2024 IEEE WIRELESS POWER TECHNOLOGY CONFERENCE AND EXPO, WPTCE , 2024 , 821-824 . |
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Wireless power transfer (WPT) is an emerging technology that enables the wireless transfer of electrical energy from power supplies to electrical equipment. It has been widely used in electric vehicles, mobile phones, household appliances, medical devices, and other fields. However, the frequency splitting and bifurcation phenomena existing in WPT systems are the fundamental obstacles and challenges that affect the effective operation of WPT systems. In this paper, a method based on the fractional-order circuit is proposed to simultaneously suppress the frequency splitting and bifurcation phenomena by changing the order of fractional-order capacitor. By replacing the compensation capacitor in the transmitter of the traditional WPT system with a fractional-order capacitor, a fractional-order WPT system is formed. Then, using fractional calculus and circuit theory, the mathematical model of the proposed WPT system containing a fractional-order capacitor is established, and the frequency splitting and bifurcation phenomena are analyzed. The theoretical results show that the frequency splitting and bifurcation phenomena are suppressed only by adjusting the order of fractional-order capacitor, and the output power of the original resonant frequency is improved. Finally, the experimental prototype is implemented to validate the theoretical results. In this paper, a method based on the fractional-order circuit is proposed to simultaneously suppress the frequency splitting and bifurcation phenomena by changing the order of fractional-order capacitor. The theoretical results show that the frequency splitting and bifurcation phenomena are suppressed only by adjusting the order of fractional-order capacitor, and the output power of the original resonant frequency is improved. Finally, the experimental prototype is implemented to validate the theoretical results.image
Keyword ：
fractional-order fractional-order frequency bifurcation frequency bifurcation frequency splitting frequency splitting wireless power transfer wireless power transfer
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| GB/T 7714 | Shu, Xujian , Zhang, Xueqi , Jiang, Yanwei et al. A Fractional-Order Method of Frequency Splitting and Bifurcation Suppression for Wireless Power Transfer Systems [J]. | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2024 , 52 (12) : 6468-6478 . |
| MLA | Shu, Xujian et al. "A Fractional-Order Method of Frequency Splitting and Bifurcation Suppression for Wireless Power Transfer Systems" . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS 52 . 12 (2024) : 6468-6478 . |
| APA | Shu, Xujian , Zhang, Xueqi , Jiang, Yanwei , Zhang, Bo . A Fractional-Order Method of Frequency Splitting and Bifurcation Suppression for Wireless Power Transfer Systems . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2024 , 52 (12) , 6468-6478 . |
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At present, wireless power transfer systems based on magnetic resonance, parity-time symmetry, and fractional order have received more and more attention, especially in wireless charging applications of mobile phones, electric vehicles, and other products. However, the consequent electromagnetic radiation safety issues are becoming increasingly prominent. Therefore, this paper compares and studies the magnetic field distribution of magnetic resonance, parity-time symmetric and fractional-order wireless power transfer systems, and uses ANSYS simulation software to simulate and comparative analyze. The simulation results show that under the condition of equal output power, the magnetic field distribution of the parity-time symmetric wireless power transfer system is more concentrated when the coupling coefficient is small, while the magnetic field distribution of the magnetic resonance wireless power transfer system is more concentrated when the coupling coefficient is large, but it is significantly smaller than that of the fractional-order wireless power transfer system. In addition, the safety range of the parity-time symmetric wireless power transfer system is significantly larger than that of the magnetic resonance and the fractional-order wireless power transfer system at different output power. Remarkably, the magnetic field distribution of fractional-order wireless power transfer system will also change with different order, which implies that the safety range of the fractional-order wireless power transfer system can be designed according to the requirements to achieve the ideal safety range. © 2024 IEEE.
Keyword ：
Fractional order Fractional order Magnetic field distribution Magnetic field distribution Magnetic resonance Magnetic resonance Parity-time symmetry Parity-time symmetry Wireless power transfer Wireless power transfer
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| GB/T 7714 | Shu, X. , Wu, G. , Jiang, Y.W. et al. Study on magnetic field characteristics of typical wireless power transfer systems [未知]. |
| MLA | Shu, X. et al. "Study on magnetic field characteristics of typical wireless power transfer systems" [未知]. |
| APA | Shu, X. , Wu, G. , Jiang, Y.W. , Zhang, X. . Study on magnetic field characteristics of typical wireless power transfer systems [未知]. |
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