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学者姓名:程翔鹏
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Abstract :
With the development of electric vehicles (EVs), lithium-ion batteries have two rated voltages: 400 and 800 V, and are suitable for different output power scenarios. Considering the interoperability of public wireless power transfer (WPT) facilities, the WPT system for EVs not only needs to be compatible with the battery voltage class (BVC) under the premise of meeting the corresponding output power level, but also needs to take into account different coupling structures, namely unipolar (Q) and bipolar (DD) coils. Under the background of the interoperability of the above-mentioned BVC and coupling structures, an integrated dual-decoupled transmitter is proposed. First, finite element analysis and optimization were carried out for the proposed coupling structure. While obtaining the optimal coil parameters, the interoperability performance with Q and DD coils was also achieved. Then, by combining circuit topology, four different output modes can be achieved, which are used to adapt to the BVCs under different power levels and different coupling structures. A downscaled experimental prototype with the power of 5.0-kW was established. Under the premise of 200 V input voltage, the efficient transmission of 200 and 400 V output of Q and DD coil was achieved. The dc-dc efficiency is greater than 91%. Finally, on the premise of meeting the interoperability of Q and DD coils, the proposed structure also has a certain degree of antimisalignment characteristics.
Keyword :
Automobiles Automobiles Batteries Batteries Battery voltage class (BVC) Battery voltage class (BVC) Coils Coils Couplings Couplings electric vehicles (EVs) electric vehicles (EVs) interoperability interoperability Interoperability Interoperability Magnetic fields Magnetic fields Switches Switches Topology Topology Vectors Vectors Voltage Voltage wireless power transfer (WPT) wireless power transfer (WPT)
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GB/T 7714 | Liu, Chao , Zhou, Mingzhu , Zhuang, Yizhan et al. Integrated Dual-Decoupled Transmitter With Battery Voltage Interoperability for Wireless Charging of EVs [J]. | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2025 . |
MLA | Liu, Chao et al. "Integrated Dual-Decoupled Transmitter With Battery Voltage Interoperability for Wireless Charging of EVs" . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS (2025) . |
APA | Liu, Chao , Zhou, Mingzhu , Zhuang, Yizhan , Cheng, Xiangpeng , Mao, Xingkui , Zhang, Yiming . Integrated Dual-Decoupled Transmitter With Battery Voltage Interoperability for Wireless Charging of EVs . | IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS , 2025 . |
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Improving power density and system integration is a pivotal focus for wireless power transfer (WPT) in portable devices. However, challenges, such as misalignment tolerance and power fluctuation persist. This letter introduces a robust solution utilizing secondary independent PWM control. A coil structure combining solenoids and reverse windings ensures passive misalignment tolerance, while a grooved magnetic core integrates the converter, optimizing compactness. In addition, the secondary PWM control achieves precise output voltage regulation without communication. A high-power-density WPT prototype validates the proposed coupler and control method, demonstrating less than 1% output voltage fluctuation under a 50% misalignment and maintaining over 89% efficiency at 100 W. The secondary device is highly compact, measuring only 60 mm x 30 mm x 7.5 mm and achieving power density of 7.41 W/cm(3).
Keyword :
Coils Coils Couplers Couplers High power density High power density Inductance Inductance Inverters Inverters Magnetic cores Magnetic cores misalignment tolerance misalignment tolerance Pulse width modulation Pulse width modulation receiver control receiver control Rectifiers Rectifiers Solenoids Solenoids Voltage control Voltage control Windings Windings wireless power transfer (WPT) wireless power transfer (WPT)
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GB/T 7714 | Yu, Xingpeng , Xie, Ronghuan , Tu, Yixian et al. Compact Wireless Power Transfer With Enhanced Misalignment Tolerance via Independent Secondary PWM Control [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (9) : 11998-12002 . |
MLA | Yu, Xingpeng et al. "Compact Wireless Power Transfer With Enhanced Misalignment Tolerance via Independent Secondary PWM Control" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 40 . 9 (2025) : 11998-12002 . |
APA | Yu, Xingpeng , Xie, Ronghuan , Tu, Yixian , Zhuang, Yizhan , Cheng, Xiangpeng , Yin, Fanghui et al. Compact Wireless Power Transfer With Enhanced Misalignment Tolerance via Independent Secondary PWM Control . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (9) , 11998-12002 . |
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For automated guided vehicles (AGVs), the charging current is generally high to shorten the charging time. To achieve a high-current output, parallel connections are often chosen to distribute the current evenly across multiple coils or systems. This letter proposes a high-current output method based on intertwined receiving coils and split compensation capacitors. The receiving coil is split into four intertwined coils. They are arranged in such a way that the four coils are symmetrical to each other even with offset. Meanwhile, part or all of the compensating capacitors on the receiving side can also be split into four branches, connecting to the corresponding four receiving coils. It is proved that for the coil structure proposed when the whole compensating capacitors are split into four branches, the current difference of the four coils is the smallest. An experimental prototype is implemented. The experimental results show that the proposed method can achieve good current balancing performance of the four receiving coils even under the conditions of load change and coil position offset.
Keyword :
Capacitors Capacitors Coils Coils Couplings Couplings Current sharing Current sharing Equivalent circuits Equivalent circuits high-current output high-current output Impedance Impedance Inductance Inductance Inductors Inductors intertwined coil intertwined coil Resonance Resonance split compensating capacitors split compensating capacitors Topology Topology Voltage Voltage wireless power transfer (WPT) wireless power transfer (WPT)
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GB/T 7714 | Zhang, Yiming , Ouyang, Hongjing , Zhang, Tao et al. High-Current Output for AGV Wireless Charging System With Intertwined Receiving Coils and Split Compensating Capacitors [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (7) : 8923-8927 . |
MLA | Zhang, Yiming et al. "High-Current Output for AGV Wireless Charging System With Intertwined Receiving Coils and Split Compensating Capacitors" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 40 . 7 (2025) : 8923-8927 . |
APA | Zhang, Yiming , Ouyang, Hongjing , Zhang, Tao , Xie, Ronghuan , Chen, Xiaoying , Cheng, Xiangpeng et al. High-Current Output for AGV Wireless Charging System With Intertwined Receiving Coils and Split Compensating Capacitors . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (7) , 8923-8927 . |
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In the application process of wireless charging for electric vehicles, foreign object detection (FOD) is one of the necessary measures to address safety issues. This letter proposes a self-resonant FOD method for metal object (MO) and living object (LO) detection. It is possible to detect an MO and an LO without being affected by the 85-kHz power transmission, without the need for a detection coil specifically designed to decouple from the power transmission coil and a high-pass filter. Each self-resonant detection coil consists of a unipolar coil and a comb-shaped capacitor plate. This letter describes a method that can identify an MO and an LO by scanning frequencies within a small range and detecting the slope of the output voltage as it changes with frequency. When there are no foreign objects, the absolute value of the output voltage slope is less than 0.15. The voltage slope less than -0.15 indicates the presence of MOs, while a slope greater than 0.15 indicates the presence of an LO. To verify the feasibility of the proposed method, an experimental prototype has been constructed.
Keyword :
Capacitance Capacitance Capacitors Capacitors Coils Coils Copper Copper Electric vehicles (EVs) Electric vehicles (EVs) foreign object detection (FOD) foreign object detection (FOD) Image edge detection Image edge detection Inductive charging Inductive charging Object detection Object detection Resistance Resistance Resonant frequency Resonant frequency self-resonant self-resonant Steel Steel wireless charging wireless charging
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GB/T 7714 | Zheng, Yingyao , Zhou, Yicheng , Xie, Ronghuan et al. A Self-Resonant Foreign Object Detection System for Metal and Living Object Detection in Electric Vehicle Wireless Charging Systems [J]. | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (5) : 6459-6463 . |
MLA | Zheng, Yingyao et al. "A Self-Resonant Foreign Object Detection System for Metal and Living Object Detection in Electric Vehicle Wireless Charging Systems" . | IEEE TRANSACTIONS ON POWER ELECTRONICS 40 . 5 (2025) : 6459-6463 . |
APA | Zheng, Yingyao , Zhou, Yicheng , Xie, Ronghuan , Mao, Xingkui , Chen, Xiaoying , Cheng, Xiangpeng et al. A Self-Resonant Foreign Object Detection System for Metal and Living Object Detection in Electric Vehicle Wireless Charging Systems . | IEEE TRANSACTIONS ON POWER ELECTRONICS , 2025 , 40 (5) , 6459-6463 . |
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