Zhihao Kou

Southwest Jiaotong University

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Ruikun Mai

Southwest Jiaotong University

Yang Chen

Nanjing University of Science and Technology

Qingsong Hu

Shanghai Ocean University

Zhengyou He

Southwest Jiaotong University

Liudi Wang

Tsinghua University

Guang‐Zhong Cao

Shenzhen University

Yuanxun Cheng

Xi’an University of Posts and Telecommunications

Yujia Luo

Shaanxi Normal University

Shuya Yuan

First Affiliated Hospital of Zhengzhou University

Mingxuan Li

Dalian Maritime University

Cooperative Institutions

Southwest Jiaotong University

Tsinghua University

Ministry of Education of the People's Republic of China

University of Electronic Science and Technology of China

Kunming University of Science and Technology

North China Electric Power University

Chinese Academy of Sciences

Shanghai Ocean University

Dalian Maritime University

China University of Petroleum, East China

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Iterative maximum-likelihood estimation algorithm for clock offset and skew correction in UWB systems assisted by 5G NR multipath

Measurement (2024)

Qingsong Hu Liudi Wang Yujia Luo Yuanxun Cheng Zhihao Kou

Carrier frequency offset

10.1016/j.measurement.2024.115823

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Hybrid and Reconfigurable IPT Systems With High-Misalignment Tolerance for Constant-Current and Constant-Voltage Battery Charging

IEEE Transactions on Power Electronics (2018)

Yang Chen Bin Yang Zhihao Kou Zhengyou He Guang‐Zhong Cao

Inductive power transfer (IPT) for battery charging applications has significant advantages over the traditional plug-in system. Since misalignment between the primary and secondary windings is inevitable, it is of significance to improve the misalignment tolerance of IPT systems with constant-current (CC) and constant-voltage (CV) outputs for battery charging. In this paper, the load-independent output characteristic of the hybrid topology and the function switching between CC and CV of the reconfigurable topology are analyzed. Besides, a hybrid and reconfigurable IPT system with 3-D misalignment tolerance for CC and CV outputs is proposed, simplifying or even canceling control schemes. Moreover, a novel parametric design method is given for the IPT system, which can suppress the fluctuation of the output voltage/current within a certain range of misalignment. In order to validate the performance of the proposed topology, a 1-kW prototype is built, and the corresponding experiments are carried out. In the CC/CV mode, the system can operate with the longitudinal misalignment to 50% when the load varies from 36 to 480 Ω, and the fluctuation of the output current/voltage is within 5%. Similarly, the misalignment in Y- and Z-axis is 12.5% and 33.3%, respectively.

Constant current

Constant (computer programming)

10.1109/tpel.2018.2809785

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Citations (178)

Hybrid Topology With Configurable Charge Current and Charge Voltage Output-Based WPT Charger for Massive Electric Bicycles

IEEE Journal of Emerging and Selected Topics in Power Electronics (2017)

Yang Chen Zhihao Kou Youyuan Zhang Zhengyou He Ruikun Mai

Wireless power transfer chargers for electric bicycles (EBs) have many advantages over transitional plug-in systems. However, to meet the charge requirements, the traditional charger needs a dedicated inverter to achieve constant current (CC) output or constant voltage (CV) output. A hybrid topology-based EB charging strategy is proposed using a single high-frequency inverter (HFI) to charge massive EBs, and one charging stand can be shared to charge EBs with various specifications of batteries. Configurable CC and CV outputs can be realized by turning on/off two ac switches without adopting sophisticated control schemes or wireless communication links. Besides, zero phase angle switching of HFI can be realized, and then the system efficiency is increased. Finally, the proposed method is verified by experiments with various charging conditions. The results show that the fluctuation margins of charging currents and charging voltages in the whole charging process are both less than 2.5% and the maximum efficiency reaches 91.90%. With the merit of the proposed approach, the reduction of construction cost and the control complexity is achieved. Thus, it might be one of the most promising solutions for charging massive EBs in some regions like China.

Wireless Power Transfer

Constant current

Charge control

10.1109/jestpe.2017.2782269

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Citations (103)

A Nlos Position Estimation Method for T-Shaped Tunnel Based on Corrected Ghost Point

Zhihao Kou Yujia Luo Liudi Wang Shuya Yuan Qingsong Hu

Non-line-of-sight propagation

Position (finance)

10.2139/ssrn.4995279

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Cost‐effective inductive power transfer charging system for electric bicycles with variable charging current using primary‐side detuned series‐series topology

IET Electric Power Applications (2019)

Yang Chen Mingxuan Li Zhihao Kou Zhengyou He Ruikun Mai

Due to the convenience and long travelling distance, electric bicycles (EBs) are becoming more and more popular. Charging EBs with inductive power transfer (IPT) technology can free people from wearisome plugging actions and avoid electric shock hazards. However, the cost, including component cost and control cost, is a big challenge for the extensive promotion of the IPT charging systems (IPTCSs) for EBs. This article proposes an IPTCS using primary‐side detuned series‐series (SS) compensation topology, cancelling control scheme and reducing the component cost. With the proposed parametric design method, the IPTCS can operate with variable charging current according to the variable equivalent resistance of a battery. Besides, the inductive input impedance is guaranteed to achieve soft switching for the high‐frequency inverter. An experimental setup is constructed to validate the proposed method. The performance shows that the charging current decreases from 1.8 to 0.1 A, and charging voltage increase from 42.23 to 54.01 V during the whole charging process, where the maximum efficiency of the IPTCS can reach up to 92.8%. The results demonstrate the proposed IPTCS is a cost‐effective and potential solution for charging EBs.

10.1049/iet-epa.2019.0125

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Citations (1)

Non-Line-Of-Sight Target Localization in T-Shaped Roadways Using Simo Fmcw Millimeter-Wave Radar

Qingsong Hu Yujia Luo Liudi Wang Yuanxun Cheng Yuansheng Zhang

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Extremely high frequency

Line-of-sight

Line (geometry)

10.2139/ssrn.4835859

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