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学者姓名：疏许健
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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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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, 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 ：
Magnetic Coupling Wireless Power Transfer (MCWPT) technology has broad application prospects due to its high degree of freedom in energy exchange and unparalleled security. In recent years, various controllers have been added to WPT systems to improve energy transfer performance. Among them, the Dual-Side Control (DSC) approach, which employs Dual-Active Bridge (DAB) converters with simultaneous control of the transmitter and receiver, has made great progress. The DAB structure has a compromise between cost and complexity, and the DSC can bring a high enough degree of control freedom to the MCWPT system to easily achieve efficiency optimization and desired output characteristics. However, various DSC methods have different characteristics. Therefore, this paper reviews and summarizes the current research status of DSC methods based on the DAB converters in MCWPT systems. Wireless communication is one of the decisive factors in the design of a control strategy, which is categorized in this paper according to the main approaches used in all the papers. Various DSC strategies are described in detail and compared comprehensively according to the control variables and control objectives. This review will be highly beneficial to research entities and industry professionals as a ready reference for the control design in MCWPT.
Keyword ：
constant output constant output dual-active bridge converters dual-active bridge converters dual-side control strategy dual-side control strategy efficiency optimization efficiency optimization high robustness high robustness magnetic coupling magnetic coupling wireless communication wireless communication wireless power transfer wireless power transfer
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| GB/T 7714 | Jiang, Yanwei , Li, Yingao , Yang, Jingjing et al. A Review of Research on Dual-Side Control Methods for Magnetic Coupling Wireless Power Transfer Systems Based on Dual-Active Bridge Converters [J]. | ELECTRONICS , 2024 , 13 (23) . |
| MLA | Jiang, Yanwei et al. "A Review of Research on Dual-Side Control Methods for Magnetic Coupling Wireless Power Transfer Systems Based on Dual-Active Bridge Converters" . | ELECTRONICS 13 . 23 (2024) . |
| APA | Jiang, Yanwei , Li, Yingao , Yang, Jingjing , Shu, Xujian . A Review of Research on Dual-Side Control Methods for Magnetic Coupling Wireless Power Transfer Systems Based on Dual-Active Bridge Converters . | ELECTRONICS , 2024 , 13 (23) . |
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Abstract ：
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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Abstract ：
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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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
Cite：
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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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Version ：
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 ：
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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Abstract ：
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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Abstract ：
The parity-time (PT) symmetric principle has been proved that it can improve the degree of freedom of the wireless power transfer (WPT) system with multiple repeaters, while maintaining constant transfer efficiency and transmission power. This article presents a novel three-coil WPT system with S/S/PS compensation network based on the PT symmetry principle to further expand the exact PT-symmetric region and increase the output power. First, the PS compensation network increases the order of the system. This problem has been solved by simplifying the PS compensation network to the S compensation network with equivalent circuit theory. Second, it is found that the proposed system has smaller critical coupling coefficient and is able to provide higher output power compared to traditional three-coil PT-symmetric system. Third, the capacitance distribution ratio can be designed to make the system adapt to different application scenarios. Finally, an experimental prototype 48Wis developed to verify the proposed system.
Keyword ：
Equivalent circuit method Equivalent circuit method parity-time (PT) symmetry parity-time (PT) symmetry relay coil relay coil wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Qu, Yuhu , Zhang, Bo , Gu, Wenchao et al. Wireless Power Transfer System With High-Order Compensation Network Based on Parity-Time-Symmetric Principle and Relay Coil [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2023 , 38 (1) : 1314-1323 . |
| MLA | Qu, Yuhu et al. "Wireless Power Transfer System With High-Order Compensation Network Based on Parity-Time-Symmetric Principle and Relay Coil" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 38 . 1 (2023) : 1314-1323 . |
| APA | Qu, Yuhu , Zhang, Bo , Gu, Wenchao , Shu, Xujian . Wireless Power Transfer System With High-Order Compensation Network Based on Parity-Time-Symmetric Principle and Relay Coil . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2023 , 38 (1) , 1314-1323 . |
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