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学者姓名：毛行奎
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Abstract ：
Battery is a key component of Electric Vehicles (EVs), which has sparked a great demand for improvement in the EVs charging system. This paper proposes an integrated charging system for wireless power transfer (WPT), Onboard charger (OBC), and auxiliary power module (APM). The receiving coil on the secondary side can be weakly coupled with the transmitting coil of WPT and strongly coupled with the transmitting coil of OBC. Using a transformer on the receiving side to integrate the APM into the circuit. In this way, receiving coil, compensation network, and power electronics converter can be shared. The integrated structure can work in three working patterns. In the WPT mode and OBC mode, power grid delivers energy to the EV batteries, high-voltage (HV) batteries and low-voltage (LV) batteries can be charged at the same time. In the APM mode, HV batteries power LV batteries. In the traditional EV charger, WPT, OBC, and APM are three separate systems. This paper integrates three charging systems with the advantages of high-power density and cost effectiveness. The experimental results verify the proposal. © 2024 IEEE.
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| GB/T 7714 | Wu, Y. , Xie, R. , Xu, W. et al. An Integrated Charger of Wireless Power Transfer, Onboard Charger, and Auxiliary Power Module for Electric Vehicles [未知]. |
| MLA | Wu, Y. et al. "An Integrated Charger of Wireless Power Transfer, Onboard Charger, and Auxiliary Power Module for Electric Vehicles" [未知]. |
| APA | Wu, Y. , Xie, R. , Xu, W. , Pan, W. , Mao, X. , Zhang, Y. . An Integrated Charger of Wireless Power Transfer, Onboard Charger, and Auxiliary Power Module for Electric Vehicles [未知]. |
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Abstract ：
The unipolar, bipolar, and quadrupolar coils used in an electric vehicle wireless charging system are not interoperable with each other. Thus, there would be interoperability issues when the transmitting and receiving coils are not the same. To solve this issue, in this letter, we propose an asymmetrical quadrupolar coil that can be interoperable with the four conventional coils at the same position for efficient wireless power transfer, namely the unipolar coil, the bipolar coil along two perpendicular directions, and the quadrupolar coil. Large coupling coefficients can be achieved for the proposed coil with the four conventional coils when perfectly aligned. The misalignment performance with the four conventional coils is also investigated. An experimental prototype is developed to compare the conventional symmetrical quadrupolar coil with the proposed asymmetrical quadrupolar coil for validation of interoperability. The proposed asymmetrical quadrupolar coil achieves a maximum coupling coefficient of over 0.10 and a maximum dc-dc efficiency of over 85% with the four conventional coils.
Keyword ：
Bipolar Bipolar interoperability interoperability quadrupolar quadrupolar tolerance tolerance unipolar unipolar wireless charging wireless charging wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Zhang, Yiming , Liu, Chao , Zhou, Mingzhu et al. A Novel Asymmetrical Quadrupolar Coil for Interoperability of Unipolar, Bipolar, and Quadrupolar Coils in Electric Vehicle Wireless Charging Systems [J]. | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 71 (4) : 4300-4303 . |
| MLA | Zhang, Yiming et al. "A Novel Asymmetrical Quadrupolar Coil for Interoperability of Unipolar, Bipolar, and Quadrupolar Coils in Electric Vehicle Wireless Charging Systems" . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 71 . 4 (2024) : 4300-4303 . |
| APA | Zhang, Yiming , Liu, Chao , Zhou, Mingzhu , Mao, Xingkui . A Novel Asymmetrical Quadrupolar Coil for Interoperability of Unipolar, Bipolar, and Quadrupolar Coils in Electric Vehicle Wireless Charging Systems . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 71 (4) , 4300-4303 . |
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Abstract ：
The unipolar and bipolar coils are two most common coil structures used in inductive power transfer systems. However, they are decoupled from each other when fully aligned, indicating that they are not interoperable with each other. In order to solve the interoperability problem, an interoperable transmitter composed of two adjacent unipolar coils and a three-switch dual-output inverter is proposed in this letter. It can achieve compatibility with unipolar or bipolar coils through circuit configuration by alternating the current directions with efficient wireless power transmission. Two different operating modes are presented, and the mathematical models are established. An experimental prototype is established. Besides, the anti-offset has been tested. The calculated and experimental results have revealed that the proposed system can effectively improve interoperability and has great potential for development.
Keyword ：
Bipolar coil Bipolar coil inductive power transfer (IPT) inductive power transfer (IPT) interoperability interoperability unipolar coil unipolar coil wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Xie, Ronghuan , Liu, Rongbin , Chen, Xiaoying et al. An Interoperable Wireless Power Transmitter for Unipolar and Bipolar Receiving Coils Based on Three-Switch Dual-Output Inverter [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (2) : 1985-1989 . |
| MLA | Xie, Ronghuan et al. "An Interoperable Wireless Power Transmitter for Unipolar and Bipolar Receiving Coils Based on Three-Switch Dual-Output Inverter" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 39 . 2 (2024) : 1985-1989 . |
| APA | Xie, Ronghuan , Liu, Rongbin , Chen, Xiaoying , Mao, Xingkui , Li, Xin , Zhang, Yiming . An Interoperable Wireless Power Transmitter for Unipolar and Bipolar Receiving Coils Based on Three-Switch Dual-Output Inverter . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (2) , 1985-1989 . |
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Abstract ：
In recent years, electric vehicles have developed rapidly, but the traditional wired charging method cannot meet the requirements of automation and convenience of the vehicles. Therefore, the wireless charging technology for electric vehicles has been widely studied for its safety and convenience. The common coil structures in the wireless charging system include the unipolar coil, the bipolar coil and the quadrupole coil. Due to the adaptation problems of different manufacturers, a new type of coil should be designed to get compatible with these coils to achieve the interoperability. This paper presents a new decoupled quadruple monopole receiving coil structure, which may achieve the interoperability with different transmitting coils. The decoupling between the four receiving coils is realized by adding a decoupling winding inside the receiving coils. Then, the total mutual inductance between the transmitting coil and the four monopole receiving coils is the sum of the absolute value of the mutual inductance between the transmitting coil and the four monopole coils by the series diode rectifier. A set of experimental prototype is built to verify the effectiveness of the scheme. The proposed four-monopole receiving coil is able to be compatible with the unipolar coil, the bipolar coil and the quadrupole coil, realizing the interoperability with different receiving coils. © 2024 Power System Technology Press. All rights reserved.
Keyword ：
Electric rectifiers Electric rectifiers Electric vehicles Electric vehicles Electric windings Electric windings Energy transfer Energy transfer Inductance Inductance Inductive power transmission Inductive power transmission Interoperability Interoperability
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| GB/T 7714 | Zhang, Yiming , Shen, Zhiwei , Mao, Xingkui et al. Interoperability of Electric Vehicle Wireless Charging System Based on Decoupled Four-monopole Receiving Coil [J]. | Power System Technology , 2024 , 48 (2) : 650-657 . |
| MLA | Zhang, Yiming et al. "Interoperability of Electric Vehicle Wireless Charging System Based on Decoupled Four-monopole Receiving Coil" . | Power System Technology 48 . 2 (2024) : 650-657 . |
| APA | Zhang, Yiming , Shen, Zhiwei , Mao, Xingkui , Chen, Kainan , Zhao, Zhengming . Interoperability of Electric Vehicle Wireless Charging System Based on Decoupled Four-monopole Receiving Coil . | Power System Technology , 2024 , 48 (2) , 650-657 . |
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Abstract ：
针对传统采用铁氧体磁芯的电压调节模块(VRM)耦合电感体积较大的问题，采用饱和磁密更大的磁粉芯作为磁芯材料，减小磁件体积，提出基于磁粉芯的VRM耦合电感设计方案和流程。最后，依据设计参数搭建了1台磁耦合VRM样机，样机模组部分的电流密度达0.5 A/mm~2,电感总高度仅5 mm,性能良好。实例验证所提方案和设计流程正确有效，能实现VRM耦合电感的小型化和低截面。
Keyword ：
电压调节模块 电压调节模块 电感 电感 磁粉芯 磁粉芯 磁耦合 磁耦合
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| GB/T 7714 | 张彬意 , 杨祺欣 , 毛行奎 . 基于磁粉芯的小型化磁耦合VRM设计 [J]. | 电器与能效管理技术 , 2024 , PageCount-页数: 7 (06) : 31-36,48 . |
| MLA | 张彬意 et al. "基于磁粉芯的小型化磁耦合VRM设计" . | 电器与能效管理技术 PageCount-页数: 7 . 06 (2024) : 31-36,48 . |
| APA | 张彬意 , 杨祺欣 , 毛行奎 . 基于磁粉芯的小型化磁耦合VRM设计 . | 电器与能效管理技术 , 2024 , PageCount-页数: 7 (06) , 31-36,48 . |
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This paper proposes a solution to address the issue of fluctuating coupling coefficients in wireless power transmission for electric vehicles. The proposed solution involves the utilization of the novel Double Quadrature D (DQD) magnetic coupler with lightweight magnetic core, which optimizes the structure of the part-coverage magnetic core and incorporates stacked D coils. This approach enhances the coupling performance while minimizing the usage of magnetic core. The paper includes mathematical modeling and analysis of the DQD magnetic coupler, as well as the derived output characteristics of the wireless power transfer (WPT) system based on the inductance-capacitance-capacitance-series (LCC-S) compensation topology. In addition, the parameters are optimized to improve coupling capability, anti-offset performance, and overall lightweight design. A comparative analysis is conducted among the coupling coefficient retention capability of the DQD magnetic coupler and other magnetic coupler, highlighting the superior multi-directional anti-offset performance of the DQD magnetic coupler. To validate the proposed solution, a 1kW experimental prototype is constructed the measured and simulated results demonstrate a consistent agreement, thereby confirming the feasibility of the proposed DQD magnetic coupler to significantly reduce magnetic core. IEEE
Keyword ：
electric vehicles electric vehicles magnetic coupler magnetic coupler misalignment tolerance1 misalignment tolerance1 wireless power transfer wireless power transfer
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| GB/T 7714 | Lin, J. , Mao, X. , Su, T. et al. Magnetic Coupler Parameters Optimization for Electric Vehicle Charging System With DQD Coil Structure [J]. | IEEE Journal of Emerging and Selected Topics in Power Electronics , 2024 : 1-1 . |
| MLA | Lin, J. et al. "Magnetic Coupler Parameters Optimization for Electric Vehicle Charging System With DQD Coil Structure" . | IEEE Journal of Emerging and Selected Topics in Power Electronics (2024) : 1-1 . |
| APA | Lin, J. , Mao, X. , Su, T. , Qi, W. , Wang, Y. , Zhang, Y. . Magnetic Coupler Parameters Optimization for Electric Vehicle Charging System With DQD Coil Structure . | IEEE Journal of Emerging and Selected Topics in Power Electronics , 2024 , 1-1 . |
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In the field of wireless charging technology for electric vehicles, the charging process of lithium-ion batteries is typically divided into two stages: constant-current (CC) charging and constant-voltage (CV) charging. This two-stage charging method helps protect the battery and extend its service life. This paper proposes a family of circuit topology design schemes that achieve a smooth transition from CC to CV charging stages by using two relays. Additionally, the paper derives the corresponding system efficiency formulas and provides constraints on device parameters to ensure that the charging efficiency remains high during different charging stages. The proposed family of circuit topologies adopt unified device parameters and relay control logic, simplifying the design and operation process, and making these topologies more suitable for large-scale applications. To verify the practical performance of these topologies, the paper constructs experimental prototypes and conducts tests. The experimental results show that the proposed family of topologies can stably achieve CC and CV output, with smooth transitions between the two charging modes, and the efficiency can be maintained above 89% before and after mode switching over a wide load range. Furthermore, the mode switching points of the proposed family of topologies are multiples of two.
Keyword ：
constant current constant current constant voltage constant voltage efficiency optimization efficiency optimization wireless power transfer wireless power transfer
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| GB/T 7714 | Zheng, Yingyao , Xie, Ronghuan , Lin, Tao et al. A Family of Hybrid Topologies for Efficient Constant-Current and Constant-Voltage Output of Magnetically Coupled Wireless Power Transfer Systems [J]. | WORLD ELECTRIC VEHICLE JOURNAL , 2024 , 15 (12) . |
| MLA | Zheng, Yingyao et al. "A Family of Hybrid Topologies for Efficient Constant-Current and Constant-Voltage Output of Magnetically Coupled Wireless Power Transfer Systems" . | WORLD ELECTRIC VEHICLE JOURNAL 15 . 12 (2024) . |
| APA | Zheng, Yingyao , Xie, Ronghuan , Lin, Tao , Chen, Xiaoying , Mao, Xingkui , Zhang, Yiming . A Family of Hybrid Topologies for Efficient Constant-Current and Constant-Voltage Output of Magnetically Coupled Wireless Power Transfer Systems . | WORLD ELECTRIC VEHICLE JOURNAL , 2024 , 15 (12) . |
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Abstract ：
Wireless charging for automatic guided vehicles (AGVs) has gained increasing interest. One of the charging issue is misalignment tolerance. This brief proposes an AGV static wireless charging system with dual receiving coils to achieve the anti-offset characteristic. The two receiving coils are specially designed to be decoupled and have a smooth coupling coefficient variation along misalignment. They are connected to two diode rectifiers, which are paralleled on the DC side. The proposed WPT system will automatically choose the maximum coupling for power transfer. In this way, the misalignment-tolerant WPT system can be achieved. An experimental prototype is implemented to validate the proposal.
Keyword ：
Coils Coils Couplings Couplings diode rectifier diode rectifier dual receiving coils dual receiving coils Misalignment tolerance Misalignment tolerance Rectifiers Rectifiers Switches Switches Topology Topology wireless charging wireless charging Wireless communication Wireless communication Wireless power transfer Wireless power transfer wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Mao, Xingkui , Lin, Jinhui , Su, Tianzhang et al. Automatic Guided Vehicle Wireless Charging With Dual Receiving Coils for Misalignment Tolerance [J]. | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS , 2024 , 71 (1) : 336-339 . |
| MLA | Mao, Xingkui et al. "Automatic Guided Vehicle Wireless Charging With Dual Receiving Coils for Misalignment Tolerance" . | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS 71 . 1 (2024) : 336-339 . |
| APA | Mao, Xingkui , Lin, Jinhui , Su, Tianzhang , Zhang, Yiming . Automatic Guided Vehicle Wireless Charging With Dual Receiving Coils for Misalignment Tolerance . | IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS , 2024 , 71 (1) , 336-339 . |
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In wireless power transfer systems for electric vehicles, coil misalignment is inevitable in most charging situations. Most present studies concentrate on the misalignment tolerance in one direction, either in the X, Y, Z, or diagonal directions, but lack the misalignment tolerance on the whole charging plane. In this article, a reconfigurable adaptive topology and centrosymmetric coils are proposed to achieve misalignment tolerance over the whole charging plane. By switching among three operation modes of the proposed reconfigurable topology at the different misaligned regions, the output voltage at the boundary regions can be increased and the output voltage fluctuation can be limited. First, the mathematical model of the proposed reconfigurable adaptive topology in the different operation modes is investigated. Second, the design process of the magnetic coupler and the characteristics of the centrosymmetric coils are presented. Finally, a 926-W prototype is built to verify the proposed system. The experimental results demonstrate that the fluctuation of the output voltage is less than 21.3% apart from the four most corner regions, and the peak efficiency is 84.5%.
Keyword ：
Centrosymmetric coils Centrosymmetric coils electric vehicles (EVs) electric vehicles (EVs) misalignment tolerance misalignment tolerance reconfigurable topology reconfigurable topology wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Huang, Zhongjin , Liu, Chao , Pan, Wenxuan et al. Misalignment Tolerance of Electric Vehicle Wireless Charging System Based on Reconfigurable Adaptive Topology and Centrosymmetric Coils [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (4) : 4815-4823 . |
| MLA | Huang, Zhongjin et al. "Misalignment Tolerance of Electric Vehicle Wireless Charging System Based on Reconfigurable Adaptive Topology and Centrosymmetric Coils" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 39 . 4 (2024) : 4815-4823 . |
| APA | Huang, Zhongjin , Liu, Chao , Pan, Wenxuan , Chen, Xiaoying , Mao, Xingkui , Zhang, Yiming . Misalignment Tolerance of Electric Vehicle Wireless Charging System Based on Reconfigurable Adaptive Topology and Centrosymmetric Coils . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (4) , 4815-4823 . |
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Increasing switching frequency can greatly improve power density of dc-dc power converter, while meets challenges of significant high-frequency dc output ripple. The capacitor filter is a most cost-effective suppression for the output ripple. However, the capacitor parasitic parameters will deteriorate the suppression. The frequency characteristic of the capacitor filter was analyzed by considering the parasitic parameters. Then, a novel parallel dual capacitors filer is proposed, which creates the reverse coupling between the two adjacent capacitors of the filter by constructing opposite current flowing through the capacitors. Using the novel dual capacitors filer as a cell, a novel compact multicapacitors filer of V-shape is further extended. The insert gain test and the prototype with 20 MHz of switching frequency are constructed, and the experiments verified that the novel filters suppress the ripple by maximum about 50% comparing with the traditional capacitor without adding volume and cost.
Keyword ：
Capacitor filter Capacitor filter dc-dc resonant converter dc-dc resonant converter dc high-frequency ripple dc high-frequency ripple
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| GB/T 7714 | Mao, Xingkui , Zhou, Junhui , Zhang, Binyi et al. DC Output Ripple Suppression of High-Frequency DC-DC Resonant Converter [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (2) : 1952-1957 . |
| MLA | Mao, Xingkui et al. "DC Output Ripple Suppression of High-Frequency DC-DC Resonant Converter" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 39 . 2 (2024) : 1952-1957 . |
| APA | Mao, Xingkui , Zhou, Junhui , Zhang, Binyi , Lin, Youtu , Dong, Jiqing , Guan, Yueshi et al. DC Output Ripple Suppression of High-Frequency DC-DC Resonant Converter . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2024 , 39 (2) , 1952-1957 . |
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