Article
Engineering, Electrical & Electronic
Na Fu, Junjun Deng, Zhenpo Wang, Wenbo Wang, Shuo Wang
Summary: An efficiency-oriented control strategy is proposed for LCC-LCC-compensated wireless power transfer (WPT) system to achieve zero-voltage-switching operation over a wide current regulation range. The strategy combines full-bridge and half-bridge modes, identifies ZVS boundaries, and introduces an optimization method to fit theoretical control trajectories into smooth curves. A 4.4-kW WPT prototype verifies the feasibility and validity of the proposed control strategy, achieving high system efficiency even at 20% rated power.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Wenwei Victor Wang, Duleepa J. Thrimawithana, Martin Neuburger
Summary: This article proposes a new digitized modulation scheme suitable for high-power wireless electric vehicle chargers, focusing on steady-state operating principles and practical considerations. The proposed scheme achieves zero voltage switching and efficiently regulates power transfer over a wide load and coupling range. The system maintains an efficiency of 90% to 93% when controlling power transfer at 7.7 kW under varying coupling factors and battery voltages.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Fusheng Wang, Wei Zhang, Longfeng Ye, Juanjuan Guo, Kai Liu, Hieu Thanh Do
Summary: This article realizes the zero voltage switching (ZVS) of the inverter in the electric vehicle wireless charging system through parameter optimization design of compensation components, improving system efficiency. The effects of parameter adjustment of compensation components under different output voltages and coupling coefficients were analyzed, providing a basis for component optimization design. A specific parameter design method was proposed and verified through experimental results.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Xinyuan Ge, Lin Cheng, Yuan Yao, Wing-Hung Ki
Summary: This study presents a 6.78 MHz single-stage transmitter using a reconfigurable regulating class-D power amplifier for wireless power transfer applications. The transmitter achieves power regulation and transmission with only one power stage, adopts a DCM-ZVS scheme to reduce switching loss, and utilizes a dual-loop control with PI compensation for tight regulation and fast response. The system demonstrates correct output voltage regulation under load changes, delivers maximum power to the receiver over a distance, and achieves a peak efficiency of 57.3%.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Automation & Control Systems
Zhichao Hua, K. T. Chau, Wei Liu, Xiaoyang Tian, Hongliang Pang
Summary: This article presents an autonomous pulse frequency modulation (APFM) scheme for wireless battery charging using a self-excited oscillating (SEO) wireless power transfer (WPT) system with reliable zero-voltage switching (ZVS) for output power regulation. The system autonomously adjusts the operating frequency based on self-excited oscillation to deliver more power in strong coupling while maintaining high transmission efficiency. In weak coupling, it functions equivalently to a forced oscillating (FO) WPT system. Pulse frequency modulation adjusts the output power by changing the duty ratio, and reliable ZVS is achieved through current signal extraction and processing at the primary side. The feasibility of the proposed APFM for SEO-WPT system is supported by theoretical analysis and experimental verification.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
N. J. Merlin Mary, Shelas Sathyan, Hiralal Muralidhar Suryawanshi
Summary: A three-level modified series-parallel bidirectional isolated dc-dc resonant converter (TL-MSPBRC) is proposed for EV battery charging. The converter's performance is enhanced by considering the parasitics in the transformer and using the first-harmonic approximation (FHA) equivalent circuit model. It has high efficiency, soft-switching capability, and minimized conduction losses. A 3.3-kW prototype with a battery voltage range of 230-300-V is developed to validate the design method and achieves an excellent efficiency of 97.7%.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Computer Science, Information Systems
Bing Cheng, Liangzong He
Summary: This paper proposes a WPT system based on the simplest S/S compensation network, which achieves load-independent constant output by using an L-C branch to replace the secondary compensation capacitor, resulting in fewer components and a simpler control strategy compared to existing research.
Article
Engineering, Electrical & Electronic
Junzhong Xu, Thiago Batista Soeiro, Yong Wang, Fei Gao, Houjun Tang, Pavol Bauer
Summary: This paper proposes a new hybrid modulation method to address the high switching losses and large volume issues of two-stage AC-DC converters in DC-type EV chargers. By using a two-phase clamped discontinuous pulse-width-modulation (DPWM) in the front-end circuit, and cooperating it with the variable frequency triangular-current-mode (TCM) zero voltage switching (ZVS) or boundary-ZVS (B-ZVS) strategy in the back-end circuit, the system can reduce switching losses to the best extent and improve power density.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Automation & Control Systems
Hongliang Pang, Fei Xu, Wei Liu, Chi K. Tse, K. T. Chau
Summary: This article proposes an impedance buffer-based reactance cancellation method for a capacitor-inductor-capacitor-series (CLC-S) compensated wireless power transfer system with robust zero-voltage switching (ZVS). The method realizes full-range zero-phase-angle (ZPA) operation and can be regulated to ZVS switching conditions under various parameter variations. The proposed method is communication-free, feedback-free, and has simple control, making it suitable for high-order compensation systems.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Jangkyum Kim, Hyeontaek Oh
Summary: This article proposes an efficient power operation scheme for EV charging facility by jointly analyzing various power rate policies, battery wear-out costs, and uncertainty issues caused by EV users' behavior. The effectiveness of the proposed scheme is analyzed using real-world EV operation datasets, showing a reduction of 20.5% in overall cost and 17.3% in peak power compared to other benchmark models when applied in an actual power system.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Engineering, Multidisciplinary
Ibham Veza, Muhammad Zacky Asy, M. Idris, Vorathin Epin, I. M. Rizwanul Fattah, Martin Spraggon
Summary: This study analyzes the environmental and economic implications of different types of vehicles and compares their viability in terms of emission costs, fueling time costs, maintenance costs, and vehicle selection. The research indicates that electric vehicles (EVs) have the lowest CO and CO2 emissions but higher NOx, N2O, SOx, and PM10 emissions compared to other vehicle types. Despite their higher selling prices and emission costs, EVs have the lowest maintenance costs. Hybrid electric vehicles (HEVs) present the most balanced combination of selling price, emission cost, and maintenance cost. This study provides valuable insights for policymakers, automotive manufacturers, and consumers in transitioning towards more sustainable transportation solutions.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Bing Cheng, Liangzong He
Summary: This study introduces a Class-E-based inverter with a phase shift control strategy, enabling a lower operating frequency than the resonant frequency and enhancing emission intensity. Simulations and experiments show that the proposed inverter maintains high efficiency within a middle range and achieves nearly 50% transmission efficiency even in very weak coupling conditions.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Computer Science, Information Systems
Heejune Cha, Myeongseok Chae, Muhammad Ahsan Zamee, Dongjun Won
Summary: Recently, there has been a rise in electric vehicle (EV) adoption and a shift to EVs by several motor companies. However, most studies on EV charging scheduling overlook the integration of transportation and distribution systems. This study develops an integrated power-transportation system and operating algorithms to analyze the impact of EVs on distribution systems. It also proposes an optimal EV driving model with routine and long-distance driving patterns, implemented using a Markov chain model and reinforcement learning. Additionally, the study demonstrates the effectiveness of EV aggregator structures in predicting local charging demands and real-time charge control.
Article
Energy & Fuels
Musik Park, Zhiyuan Wang, Lanyu Li, Xiaonan Wang
Summary: With increasing concerns over carbon dioxide emissions, the concept of Zero Energy Building (ZEB) and Electric Vehicles (EVs) have emerged to address environmental issues. This paper develops a new framework to find the optimal energy system design that meets EV charging demand and ZEB requirements, using machine learning models to predict charging demand and Genetic Algorithm and PROBID method to optimize costs and self-sufficiency ratio. The study finds that EV charging demand significantly affects energy system design, especially in small-size buildings.
Article
Engineering, Electrical & Electronic
Min Wu, Xu Yang, Wenjie Chen, Laili Wang, Yongbin Jiang, Chenxu Zhao, Zhengchao Yan
Summary: A dual-sided control strategy based on mode switching is proposed to approach an optimal load impedance and achieve the required output in this article. The control strategy adjusts the output voltage of the inverter by switching the operation mode of the inverter in a wide range to approach the optimal load impedance. Additionally, a novel phase-locked method is proposed for the semi-bridgeless active rectifier control, which is simpler compared with traditional methods.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Thermodynamics
Jufeng Yang, Yingfeng Cai, Chris Mi
Summary: Accurate estimation of battery capacity based on battery surface temperature change is proposed in this paper. Analysis of smoothed differential thermal voltammetry curves and temperature variation transformation are used to reflect battery actual capacity and reduce initial inconsistency impact, showing superior performance compared with existing methods.
Article
Engineering, Multidisciplinary
Jianghua Lu, Guorong Zhu, Chunting Chris Mi
Summary: The successful commercialization of wireless power transfer technology requires a safe, reliable, and efficient charging infrastructure. However, metal objects and living organisms in close proximity to the charging system can pose safety hazards and affect system performance. This article provides a review of available designs for detecting metal and living objects in wireless power transfer systems, including their limitations and potential applications. It also suggests research topics to promote the development and commercialization of wireless charging systems.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Editorial Material
Engineering, Multidisciplinary
Yijie Wang, Chunting Chris Mi
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Jinglin Xia, Xinmei Yuan, Sizhao Lu, Jun Li, Shuling Luo, Siqi Li
Summary: Wireless power transfer (WPT) is more convenient and safer than conductive charging for power consumer electronics, biomedical devices, and transportation systems. Capacitive power transfer (CPT), as an alternative with better misalignment tolerance, lower cost, and weight, is becoming more attractive.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Sizhao Lu, Deyun Kong, Shuang Xu, Linglin Luo, Siqi Li
Summary: This study proposes a high-efficiency medium-frequency split planar transformer based on a low-cost ferrite core. By adopting a split planar structure, the transformer achieves high electrical insulation, efficiency, power density, and excellent heat dissipation performance. Finite-element analysis and experimental evaluation demonstrate that this transformer can simultaneously achieve high power, efficiency, power density, and electrical insulation.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Jing Lian, Xiaohui Qu, Xi Chen, Chunting Chris Mi
Summary: This article systematically analyzes the characteristics of a double-sided LCLC-compensated CPT converter and proposes a parameter design method to achieve load-independent constant current output and predesigned voltage limitations. This method can effectively mitigate breakdown and electromagnetic interference issues.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Ting Chen, Chenwen Cheng, Hong Cheng, Cong Wang, Chunting Chris Mi
Summary: This article proposes a power relay system for wirelessly powering multiple loads, and presents a mathematical model and compensation circuits to achieve efficient and interference-free power transfer.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Mechanical
Shun-Chang Duan, Jun Sun, Xian-Xu 'frank' Bai, Quoc Hung Nguyen, Zhi-Yuan Si, Wei-Han Li, Yang Liu
Summary: In this paper, a new brake system based on a brake-by-wire actuator is introduced. The system has quick and accurate braking force response, as well as stability and normal temperature change under long-time braking conditions.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Jufeng Yang, Yingfeng Cai, Chunting Chris Mi
Summary: In this study, a method based on the decoupled characteristic of the charging current is proposed to calculate the SoH of batteries. The method involves parameter identification of an equivalent circuit model and the use of a time constant feature to reflect the battery capacity degradation. Experimental results show that the proposed method has a reduced computational cost and provides satisfactory fitting performance.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Energy & Fuels
Zeyu Cheng, Zhi Cao, John T. T. Hwang, Chris Mi
Summary: This paper proposes a novel multi-phase single-turn permanent magnet synchronous motor (MSPMSM) to meet the stringent requirements of electric aircraft. The MSPMSM features a unique single-turn winding configuration, which reduces coil overhang, increases power density and torque, and reduces motor weight.
Article
Thermodynamics
Jufeng Yang, Xin Li, Xiaodong Sun, Yingfeng Cai, Chris Mi
Summary: This paper proposes a quick and robust battery capacity estimation method using a two-layer constant-voltage charging time-based model. Through studying the evolution of the model under different cut-off currents and utilizing a Ts-adaptive moving average filter, the proposed method can accurately determine the battery's state of health in real-world applications.
Article
Engineering, Electrical & Electronic
Hin Sang Lam, Huawei Yuan, Siew-Chong Tan, Chunting Chris Mi, Josep Pou, S. Y. R. Hui
Summary: This study introduces a bidirectional ac-dc power converter system using modular multilevel converters and dual active bridges, aimed at linking ac distribution voltage and dc grid for future EV charging infrastructure, with novel methods for powering EV charging in multistorey carparks and front-end control for system stability.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Weihan Li, Xianxu Frank Bai, Ping Jiang, Ling Yuan, Hui Liu, Pu Gao, Anding Zhu, Jiabao Pan
Summary: The objective of shock mitigation control is to minimize shock loads transmitted to sensitive structures or equipment. In this study, a shock mitigation control system using magnetorheological energy absorber (MREA) was established. The system utilized the piston stroke of MREA to achieve soft-landing and employed feedforward controllers with RC hysteresis model and Bingham model. Performance evaluation indexes such as average velocity change rate and V-ACR were proposed to compare and analyze the effectiveness of different control methods.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Weihan Li, Xianxu Frank Bai, Ping Jiang, Ling Yuan, Hui Liu, Pu Gao, Jiabao Pan
Summary: In Part I, a dynamic model of drop-induced shock mitigation based on MR energy absorber was deduced, and the control effectiveness of constant force and optimal Bi number control methods were compared. Additionally, a SDOF shock mitigation control system with MREA connected in parallel with a coil spring was built and the control methods were extended to this system. The 2DOF optimal Bi number control method was proposed for a one-fourth vehicle suspension system, and its effectiveness was verified through simulations and evaluations.
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
(2023)
Article
Engineering, Electrical & Electronic
Wen-Chin Liu, Ching-Hsiang Cheng, Patrick P. Mercier, Chunting Chris Mi
Summary: This article presents a frequency-domain analysis for modeling the behavior of Constant-on-Time (COT)-controlled buck converters in wide-input-output-range scenarios. A design strategy is proposed to enable robust control with a duty-cycle-independent quality factor, and a constant Q-value circuit is constructed to experimentally verify the system stability and optimal load transient response. The design strategy is also extended to other COT buck control schemes with simulation and calculation verifications.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
