Article
Engineering, Electrical & Electronic
Guanxi Li, Zirui Yao, Shiying Luo, Hao Ma
Summary: This article proposes a hybrid IPT system that achieves load-independent constant output current and improved misalignment tolerance. By using two compensated coils on the receiver side and an additional intermediate coil on the transmitter side, the system addresses the issue of pad misalignment. Experimental results show that the system performs well in various misalignment directions.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jia Li, Chong Zhu, Jixie Xie, Fei Lu, Xi Zhang
Summary: This article proposes a mistuned inductive power transfer (IPT) system structure and design methods to improve misalignment tolerance for wireless charging of autonomous underwater vehicles. The system achieves constant current and voltage output even with charging coils misaligned in horizontal and vertical directions. Experimental results demonstrate that the proposed system improves charging freedom and stability in the harsh underwater environment.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Weihao Zhao, Zhan Shen, Yingzhou Peng, Huai Wang
Summary: Misalignment sensitivity is a major issue in the development of inductive power transfer systems, leading to reduced power output, decreased efficiency, and unstable power supply. This study proposes a misalignment-tolerant winding pattern that effectively reduces horizontal misalignment sensitivity and coil ac resistance.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Fuyao Yang, Yang Liu, Yu Han, Jiaqi Chen, Shaoyu Cheng, Zihan Tian, Haisen Zhao
Summary: Due to weak coupling of loosely coupled transformer (LCT) in inductive power transfer (IPT) system, misalignment between primary and secondary coils can reduce the efficiency of IPT system seriously, which inevitably results in preventing application of IPT system in electric vehicle field. To improve the misalignment tolerance of the IPT system, a three-coil LCT with a large intermediate coil and detuned compensation are proposed and analyzed comprehensively. It is verified on an IPT prototype that three-coil LCT with a large intermediate coil can improve the misalignment tolerance.
Article
Engineering, Multidisciplinary
Bin Yang, Yang Chen, Wenjun Ruan, Haifeng Liu, Yucheng Ren, Ruikun Mai
Summary: This paper proposes a parameter design method to minimize current stresses in a hybrid topology and validates its effectiveness. The results show that the proposed method significantly improves the stability of the system and the quality of the output.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Guanxi Li, Hao Ma
Summary: This article proposes a hybrid IPT system for EVs charging applications, which has high misalignment tolerance and inherent CC-CV output. By applying two coils connected reversely in series on the transmitter side and two coils compensated by a capacitor and an inductor-capacitor-capacitor on the receiver side, natural CC-CV output is achieved without the need for an extra dc-dc converter or complicated control strategy. The experimental results demonstrate the stability of constant charging current and constant charging voltage within the predetermined misalignment range.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Computer Science, Information Systems
Eduard Mindubaev, Konstantin Gurov, Sergey Selishchev, Arseny Danilov
Summary: This paper presents an analysis of the tolerance of the inductive power transfer system to coils misalignment. Two new metrics are introduced for evaluating the system's tolerance. Design principles and an optimization process for coils are provided. The results show that optimized coils can improve the system's tolerance.
Article
Engineering, Electrical & Electronic
Hailong Zhang, Yafei Chen, Dong-Hee Kim, Zhen Li, Min Zhang, Guangyao Li
Summary: In this article, a variable inductor control method is proposed to stabilize the output voltage and current by adjusting the dc bias current of the secondary side. The proposed method achieves near-zero phase angle of the input impedance and does not require any auxiliary circuit. Experimental results show that stable output voltage and current are ensured with horizontal and vertical offsets, and the maximum efficiency is 92.9%, higher than the conventional dc-dc regulation method by 2.3%.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Guangdong Ning, Kai Zhao, Minfan Fu
Summary: This article proposes a simple and low-cost current sharing method to balance the input power in a multi-TX inductive power transfer system. The current distribution is analyzed for a two-TX system, and a sharing path is proposed to balance the power. The method is valid for other compensations and can be extended for multiple TX systems.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Yao Wang, Zhonghao Dongye, Hua Zhang, Chong Zhu, Fei Lu
Summary: This article introduces a load-independent domino-type inductive power transfer system for multiple loads, utilizing a unique domino topology for independent load output and long-distance transmission capability. The design features an innovative unipolar domino coupler configuration for efficient power transfer.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Fei Xu, Yanjie Guo, Xian Zhang
Summary: This letter presents an enhanced-fundamental-harmonic-analysis (EFHA) method to accurately derive the output current model of LCC-P compensated IPT system based on the steady-state operating waveforms in a time domain. The results show that the output current of LCC-P compensated IPT converters would degrade with the load resistance and only quasi-CC output can be achieved within a certain load range.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ke Shi, Tianxu Feng, Jincheng Jiang, Peiyue Wang, Zhenya Meng, Chunsen Tang
Summary: This article proposes a highly magnetic integrated method of LCC-compensated IPT system, which improves misalignment tolerance and realizes zero-voltage switching condition by integrating coupling coils into the coupler. The proposed design saves extra space and magnetic cores for the external compensation inductors, resulting in excellent misalignment tolerance and parameter configuration.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Rong He, Xinlin Wang, Haoyu Wang, Minfan Fu
Summary: This article develops a comprehensive ac analysis to study the optimal condition of a multitransmitter and multireceiver coupler. It defines a standard optimization problem and solves it using the Lagrange multiplier method. The article analytically discusses the optimal coupler condition, its physical meaning, and provides a uniform perspective to understand representative systems. The effectiveness of the ac analysis is justified through the evaluation and comparison of different coupler designs.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zirui Yao, Shiying Luo, Zhuhaobo Zhang, Guanxi Li, Xuan Wei, Xiangwei Shen, Ni Zhang, Philip T. Krein, Hao Ma
Summary: A topology based on a primary-side detuned multifrequency compensation circuit is proposed in this article to provide consistent output power over a wide misalignment range in inductive power transfer systems. By strategically changing the switching frequency at curve intersections, the coupling range and misalignment range can be extended without increasing power and current variability. The article presents parameter design, selection of the number of switching frequencies, and establishes fundamental relationships between power variation and coupling range. Experimental results confirm that using two frequencies achieves a power variation of 10% over a coupling coefficient range from 0.14 to 0.35, while using three frequencies reduces power variation to 6.7% over the same coupling range.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Zirui Yao, Junjie Zhang, Shiying Luo, Zhongbao Luo, Shaoting Zheng, Guanxi Li, Zhuhaobo Zhang, Philip T. Krein, Hao Ma
Summary: This article presents a method to improve the performance of inductive power transfer systems over wide misalignment and load ranges by minimizing converter and primary resonant circuit currents based on an asymmetrical factor. The proposed asymmetrical factor incorporates two design variables to redistribute zeroes and poles for power versus frequency characteristics and make the input impedance angle insensitive to coupling factor and load.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Yang Chen, Shuangjiang He, Bin Yang, Shuxin Chen, Zhengyou He, Ruikun Mai
Summary: A reconfigurable rectifier-based detuned series-series (SS) compensated IPT system is proposed to improve the system efficiency and tolerate a wide coupling range. The reconfigurable rectifier can switch between a full-bridge rectifier mode and a half-bridge rectifier mode to extend the expected coupling range of the detuned SS topology. The system efficiency is also improved by changing the ac load to match the optimal load of the IPT system.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Bin Yang, Yiyang Li, Zeheng Zhang, Shuangjiang He, Yuner Peng, Yang Chen, Zhengyou He, Ruikun Mai
Summary: This article analyzes the impact of misalignment on the performance of an inductive power transfer system and proposes a method to maintain stable power transmission. By adopting two discrete frequencies, the coupling range is extended and the efficiency is improved.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Automation & Control Systems
Bin Xu, Zhaotian Yan, Liang Xiong, Lu Zhang, Wei Zhou, Ruikun Mai, Zhengyou He, Lizhou Liu
Summary: Applying recycled power batteries to automatic guided vehicles can reduce system cost and extend battery life. A double-switch single-transformer integrated equalizer is proposed to balance the batteries during charging and discharging operations.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ying Luo, Ruikun Mai, Yi Song, Chenyan Zhu, Zhengyou He
Summary: This paper proposes an IPT system with inductor-capacitor-capacitor-dual detuned series (LCC-DDS) topology, which can suppress the secondary magnetic field by generating two nearly reverse magnetic fluxes. The simulation results show that the B-ave of the receiver core in the LCC-DDS IPT system is four times lower than that in the traditional tuned LCC-Series (LCC-S) IPT system. Moreover, the experiment tests confirm that the LCC-DDS system can efficiently suppress the secondary magnetic field and achieve a higher efficiency compared to the LCC-S system.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Engineering, Electrical & Electronic
Ying Luo, Yi Song, Zhoulong Wang, Ruikun Mai, Bin Yang, Zhengyou He
Summary: This work proposes an auto-segment control system with multiple transmitters and dual receivers for dynamic inductive power transfer charging. The system enhances the current of the transmitting coil when coupled with the receiver and suppresses it when uncoupled, reducing electromagnetic interference and power loss. The position and size of the transmitters and receivers directly impact the power transfer performance, and critical parameters of the magnetic coupler are analyzed and designed for considerable output power. Experimental results show improved spatially average power and maximum efficiency compared to a system with a single receiver.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2023)
Article
Automation & Control Systems
Shunpan Liu, Yong Li, Yihao Wu, Lingyun Zhou, Xing Zhao, Ruikun Mai, Zhengyou He
Summary: This article proposes a novel dynamic wireless power transfer system based on dual-receiver coils and the voltage doubler rectifier. The system achieves excellent output stability by designing the dimensions of the coupler to avoid oscillation caused by the frequency difference between the track coil currents.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Bin Xu, Lizhou Liu, Zhaotian Yan, Zhuqing Yuan, Lu Zhang, Wei Zhou, Ruikun Mai, Zhengyou He, Yongpan Liu, Huazhong Yang
Summary: Due to the advantages of electrical isolation, fewer switches, and easy control, the transformer-based integrated equalizer shows great promise in commercial applications. However, the limited number of balancing energy transmission channels restrict its application in long battery strings. Therefore, a modularized architecture integrated voltage equalizer (MEA-TE) is proposed to address this issue. The MEA-TE equalizer with increased energy transmission channels can successfully balance large battery packs, as demonstrated in the experimental results.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Qingsong Yu, Wenhao Xiong, Zhaotian Yan, Ruikun Mai, Zhengyou He, Yuan Shao, Xifeng Liang
Summary: A partial power processing structure is proposed for wireless power transfer system in this article. By dividing the receiver into main receiver and auxiliary receiver, the losses and stress of the cascaded dc-dc converter are reduced, and the output ripple is minimized by controlling the switching phase.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Bin Yang, Binshan Zhang, Zeheng Zhang, Ying Luo, Ruikun Mai, Zhengyou He, Yang Chen
Summary: This article proposes a clamped inductive power transfer (IPT) system to improve antimisalignment ability through dual-mode operation, without the need for coupling identification, output detection, or feedback communication. Experimental results show that the proposed method can maintain stable output power between 440 and 480 W with coupling varying from 0.14 to 0.39, while the efficiency is from 83.22% to 93.55%.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
