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学者姓名：毛行奎
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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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近年来电动汽车发展迅速，而传统的有线充电方式不能满足自动化和便利性的要求。电动汽车无线充电技术因其便利性和安全性受到广泛的研究。无线充电系统中常见的线圈结构有单极型线圈、双极型线圈和田字形线圈，由于不同厂商的适配问题，要兼容这些线圈则需要设计一种新型的线圈来实现互操作性。该文提出了一种新型的相互解耦的四单极接收线圈结构，能实现与不同发射线圈之间的互操作性。通过在接收线圈内部添加解耦绕组以实现4个接收线圈之间的解耦，并且通过串联二极管整流器使得发射线圈和四单极接收线圈之间的等效总互感是发射线圈和4个单极线圈之间的互感绝对值的总和。搭建了一套实验样机，验证了该方案的有效性，所提出的四单极接收线圈可以兼容单极型和双极型线圈以及田字形线圈，实现对不同接收线圈的互操作性。
Keyword ：
互操作性 互操作性 兼容 兼容 单极型 单极型 双极型 双极型 无线电能传输 无线电能传输 田字形线圈 田字形线圈
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| GB/T 7714 | 张艺明 , 沈志伟 , 毛行奎 et al. 基于相互解耦四单极接收线圈的电动汽车无线充电系统的互操作性 [J]. | 电网技术 , 2024 , 48 (02) : 650-663 . |
| MLA | 张艺明 et al. "基于相互解耦四单极接收线圈的电动汽车无线充电系统的互操作性" . | 电网技术 48 . 02 (2024) : 650-663 . |
| APA | 张艺明 , 沈志伟 , 毛行奎 , 陈凯楠 , 赵争鸣 . 基于相互解耦四单极接收线圈的电动汽车无线充电系统的互操作性 . | 电网技术 , 2024 , 48 (02) , 650-663 . |
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随着新能源发电的快速发展，新能源发电输出功率的间歇性和不确定性问题日益突出，为增强电网对新能源的消纳能力，设计了1台I型三电平储能变流器。在深入分析其工作原理的基础上，构建了数学模型并给出了恒流充放电控制策略。针对三电平储能变流器中点电位不平衡的问题，提出了带可变分配因子的空间矢量脉冲宽度调制(SVPWM)算法以实现对中点电位波动的快速响应。样机实验结果表明，在恒流充放电控制策略下，样机在并网工况下具有良好的稳态和暂态性能，所采用的带可变分配因子的SVPWM算法能快速抑制中点电位波动且抑制效果明显。
Keyword ：
三电平储能变流器 三电平储能变流器 中点电位平衡控制 中点电位平衡控制 新能源 新能源 空间矢量脉冲宽度调制 空间矢量脉冲宽度调制
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| GB/T 7714 | 李进伟 , 李堂 , 毛行奎 et al. I型三电平储能变流器设计 [J]. | 电器与能效管理技术 , 2024 , 7 (04) : 38-44 . |
| MLA | 李进伟 et al. "I型三电平储能变流器设计" . | 电器与能效管理技术 7 . 04 (2024) : 38-44 . |
| APA | 李进伟 , 李堂 , 毛行奎 , 张哲 . I型三电平储能变流器设计 . | 电器与能效管理技术 , 2024 , 7 (04) , 38-44 . |
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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 ：
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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In an electric vehicle wireless charging system, the dramatic variation of the mutual inductance caused by the coil misalignment is an urgent problem to be solved. An offset-resistant wireless charging system based on dual decoupled receiving coils is proposed, with one receiving coil as the unipolar coil and the other as the quadrupolar coil. With series compensation, they are connected in series through the diode rectifier. In this way, the total equivalent mutual inductance is the summation of the absolute values of the two mutual inductances. Thus, the total equivalent mutual inductance can remain stable against misalignment, guaranteeing a stable system output. Experimental results confirm that the designed system has good misalignment tolerance capability in two perpendicular directions, enabling stable and efficient power transmission. Along the misalignment, the output voltage fluctuation is only 2.81% with the highest system efficiency of 94.68%.
Keyword ：
Dual receivers Dual receivers LCC-S LCC-S misalignment tolerance misalignment tolerance offset-resistant offset-resistant wireless power transfer (WPT) wireless power transfer (WPT)
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| GB/T 7714 | Shen, Zhiwei , Zhou, Hangyan , Xie, Ronghuan et al. A Strong Offset-Resistant Electric Vehicle Wireless Charging System Based on Dual Decoupled Receiving Coils [J]. | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 71 (11) : 15216-15219 . |
| MLA | Shen, Zhiwei et al. "A Strong Offset-Resistant Electric Vehicle Wireless Charging System Based on Dual Decoupled Receiving Coils" . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 71 . 11 (2024) : 15216-15219 . |
| APA | Shen, Zhiwei , Zhou, Hangyan , Xie, Ronghuan , Zhuang, Yizhan , Mao, Xingkui , Zhang, Yiming . A Strong Offset-Resistant Electric Vehicle Wireless Charging System Based on Dual Decoupled Receiving Coils . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2024 , 71 (11) , 15216-15219 . |
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针对目前无线电能传输教学实训平台理论教学与实训脱节，使得学生对无线电能传输运行机理的认识不够深入。为激发学生学习兴趣，增强教学效果，以电动汽车无线电能传输为应用背景，对传统无线电能传输系统架构进行设计。基于基波等效法和基尔霍夫电压定律建立无线电能传输的几种典型结构数学模型，分析在谐振状态下不同结构的输出电压、电流、功率以及传输效率等特性。介绍无线电能传输教学实训平台的搭建过程，包括逆变器、整流器、磁耦合结构的设计和利兹线的计算选择等。在教学实训平台验证了几种典型无线电能传输结构的工作特性，使学生增强电力电子实践能力的同时对无线电能传输系统有更深入的认识。
Keyword ：
实验平台搭建 实验平台搭建 恒压恒流结构 恒压恒流结构 无线电能传输 无线电能传输 电动汽车 电动汽车 磁耦合结构 磁耦合结构
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| GB/T 7714 | 张艺明 , 吴元超 , 毛行奎 et al. 基于磁耦合电动汽车无线电能传输教学实训平台研究与实践 [J]. | 实验室研究与探索 , 2024 , 43 (05) : 93-98 . |
| MLA | 张艺明 et al. "基于磁耦合电动汽车无线电能传输教学实训平台研究与实践" . | 实验室研究与探索 43 . 05 (2024) : 93-98 . |
| APA | 张艺明 , 吴元超 , 毛行奎 , 陈孝莺 . 基于磁耦合电动汽车无线电能传输教学实训平台研究与实践 . | 实验室研究与探索 , 2024 , 43 (05) , 93-98 . |
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This paper proposes a zero-input-current-ripple (ZICR) high-voltage-gain dc-dc converter with an integrated Y-source network. It achieves zero input current ripple by introducing a parallel branch of an extra inductor, a coupled winding, and a capacitor at the input port. The voltage of the added inductor is opposite to that of the coupled winding. By adding the Y-source coupled inductor, the boost capability of the converter is improved. The unique boost circuit structure makes that one winding in the three-winding coupling inductance is step-down type (the turns ratio n(2) < 1) while the other winding is step-up type (the turns ratio n(1) > 1). In such a case, high voltage gain can be obtained under a lower turn ratio of the coupled inductor. The inherent passive clamping circuit clamps the spike voltage noises of the main switch to a low level and improves the efficiency. All the diodes have achieved ZCS (zero current switching) turn-off. By comparing with several new converters, the advantages of this converter are proved. Finally, a 200-W, 48- to 380-V, 50-kHz experimental prototype is built based on the theoretical research. At the rated power, the measured efficiencies with and without ZICR are 95.2% and 95.6%, respectively.
Keyword ：
coupled inductor coupled inductor dc-dc converter dc-dc converter high voltage gain high voltage gain Y-source Y-source zero input current ripple zero input current ripple
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| GB/T 7714 | Zhou, Mingzhu , Liu, Chao , Chen, Xiaoying et al. A zero-input-current-ripple high-voltage-gain DC-DC converter with integrated Y-source network [J]. | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2024 , 52 (10) : 5123-5143 . |
| MLA | Zhou, Mingzhu et al. "A zero-input-current-ripple high-voltage-gain DC-DC converter with integrated Y-source network" . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS 52 . 10 (2024) : 5123-5143 . |
| APA | Zhou, Mingzhu , Liu, Chao , Chen, Xiaoying , Mao, Xingkui , Zhang, Yiming . A zero-input-current-ripple high-voltage-gain DC-DC converter with integrated Y-source network . | INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS , 2024 , 52 (10) , 5123-5143 . |
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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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