Article
Automation & Control Systems
Xiaoqiang Wang, Jianping Xu, Minrui Leng, Hongbo Ma, Tomislav Dragicevic
Summary: This letter presents an IPT system with dual-output based on CMSC, featuring a simple circuit structure and real-time regulation control scheme at the Rx side without the need for wireless communication links. The experimental prototype demonstrates high efficiency with 92.8% maximum efficiency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Automation & Control Systems
Jikai Chen, Chuang Liu, Hongpeng Liu, Guoqing Li
Summary: This article proposes a novel zero-voltage switching full-bridge converter, integrating a half-bridge converter with center-tap rectifier into the traditional phase-shifted full-bridge converter to regulate output voltage by adjusting the phase-shifted time of the full-bridge converter. The proposed converter has advantages such as reduced filter requirement, wide ZVS range, and low primary circulating current, making it suitable for medium output voltage applications.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
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
Engineering, Electrical & Electronic
Gangwei Zhu, Jianning Dong, Wenli Shi, Thiago Batista Soeiro, Junzhong Xu, Pavol Bauer
Summary: This article proposes a mode-switching-based phase shift control (MS-PSC) method for wireless power transfer (WPT) systems. The method enables power regulation, load matching, and wide zero voltage switching (ZVS) operations without additional dc-dc converters. By analyzing the mode transitions and implementing the MS-PSC method, the system efficiency is improved over a wider power range compared to conventional controls. Experimental results validate the effectiveness of the proposed method, achieving high overall efficiency and further optimizing efficiency in a certain power range.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Junjie Feng, Qiang Li, Fred C. Lee, Minfan Fu
Summary: The study focuses on omnidirectional wireless power transfer (WPT) systems and the use of LCCL-LC resonant converter topology. The research proposes a design methodology for achieving ZVS operation, and experimental results validate the success of ZVS operation in achieving a peak system efficiency of 82% at 5-W output power.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Jin Cai, Xusheng Wu, Pan Sun, Qijun Deng, Jun Sun, Hang Zhou, Xiaona Wang
Summary: This article proposes a zero-voltage switching technology based on a full-bridge inverter that is decoupled from the output characteristics of the system, in order to achieve soft switching in inductive power transfer systems. The feasibility of this technology in such systems is demonstrated through theoretical analysis and experimental validation.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Yiming Zhang, Xin Li, Shuxin Chen, Yi Tang
Summary: This article investigates the soft switching operations of the inverter and rectifier in a strongly coupled series-series wireless power transfer system. Through time-domain analysis, it is found that a dual-side 90 degrees phase shift can avoid the hard switching of the inverter, enhance power level, and eliminate noise.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Fabio Inocencio Kravetz, Roger Gules
Summary: This study proposed a simple and efficient soft-switching structure for different configurations of the modified SEPIC converter, which can reduce losses and improve efficiency, providing a solution for high power density applications.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Peisong Ma, Deshang Sha, Keling Song
Summary: This article proposes a novel single-phase single-stage ac-dc converter based on semi dual-active-bridge dc-dc converter for unidirectional power flow applications. Dual-phase-shift (DPS) and single-phase-shift (SPS) modes are utilized with only two control variables. Optimal voltage and current waveforms are analyzed for different operation modes, and the transition process between DPS and SPS modes is described.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Automation & Control Systems
Saikat Dey, Ayan Mallik
Summary: This article presents a unified and generalized modeling, circuit analysis, and power flow optimization techniques for an n-port multiactive bridge (MAB) dc-dc converter. It aims to improve efficiency by proposing an optimal phase-duty control variable-based modulation strategy. The loss optimization technique involves formulating objective functions and employing multivariable multiconstrained optimization. A quadruple active bridge converter is designed and tested to validate the theoretical analysis and claims, showing an efficiency increment up to 17%.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Civil
Jianghua Lu, Guorong Zhu, Deyan Lin, Yiming Zhang, Haoran Wang, Chunting Chris Mi
Summary: In this paper, a unified resonant tuning configuration with minimum passive component counts is proposed to achieve CC and CV outputs at two ZPA operating frequencies. Using the simplest IPT topologies, both CC and CV outputs with ZPA are achieved with a minimum number of compensation components and no additional power switches.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Yanfeng Shen, Yunlei Jiang, Hui Zhao, Luke Shillaber, Chaoqiang Jiang, Teng Long
Summary: This article presents a generic zero-voltage switching (ZVS) scheme for parallel power MOSFETs by adding uncoupled or inversely coupled differential-mode commutation inductors to the midpoints of parallel MOSFET half-bridges and applying a time-delay-based control scheme, enabling all parallel transistors to achieve ZVS.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Young-Dal Lee, Gun-Woo Moon, Jaeil Baek, Chong-Eun Kim
Summary: This article presents a reconfigurable totem-pole bridgeless power factor correction converter employing an auxiliary circuit and a simple control scheme to achieve high efficiency. The converter utilizes auxiliary switches under light load condition for higher efficiency, while maintaining zero-voltage switching operation and relieving reverse-recovery problem under middle-to-heavy load condition with the help of the auxiliary circuit. The effectiveness of the converter is verified by a prototype with ac 230V(rms) input and 750W output.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Qiang Bo, Lifang Wang, Yuwang Zhang
Summary: To reduce switching losses in high-power IPT systems, the paper focuses on the ZVS control strategy for a parallel multi-inverter IPT system. Experimental results show that the ZVS angles of inverters remain equal under different conditions, providing a reference for parallel multi-inverter-supplied IPT systems.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2022)
Article
Automation & Control Systems
Yong Li, Wenjun Sun, Xiao Zhu, Jiefeng Hu
Summary: This article addresses the issue of high reactive power leading to low efficiency in traditional wireless power transfer systems. A mathematical model is established to reveal how reactive power decreases system efficiency. A hybrid modulation control strategy is proposed and validated through experimental results, showing high efficiencies up to 94.29% in a wide load range.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Automation & Control Systems
Feiming Liu, Jianping Xu, Zhengge Chen, Ping Yang, Kai Deng, Xin Chen
Summary: A multi-frequency pseudo-continuous conduction mode zero-voltage-switching modulation scheme is proposed in this article for the four-switch buck-boost converter. It effectively improves the heavy-load efficiency when the difference between input voltage and output voltage is large, thereby optimizing the overall efficiency.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Xiaoqiang Wang, Liangxi He, Jianping Xu, Chi-Kwan Lee, Chi K. Tse
Summary: This article proposes a power-split-based wireless charging system (WCS) with communication-free coordination control to handle wide load and coupling variations. The system uses a magnetic integrated inductor to create two power delivery channels, with a large portion of received energy directly delivered to the load, and a small amount converted by a low-voltage low-power dc-dc converter for constant voltage or constant current charging. The proposed WCS achieves higher power conversion efficiency and reduces design difficulty by processing only partial power through the dc-dc converter and applying communication-free coordination control.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Jian Chen, Jianping Xu, Wensheng Song, Quanming Luo, H. Alan Mantooth
Summary: GaN devices are more prone to severe switching oscillations due to their fast switching speeds compared to Si MOSFETs. The lower maximum gate voltage rating of GaN devices makes them more susceptible to damage from gate-source voltage oscillation. This letter proposes a gate drive circuit with a clamping function to suppress gate-source voltage oscillation, which uses passive components and simplifies the circuit design compared to other active gate driver methods. The effectiveness of the proposed method is verified through experiments.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Rui Huang, Jianping Xu, Qiang Chen, Xia Guo, Haibin Cao
Summary: In thisarticle, a reconstructed phase voltages based power following control for thethree-phase buck rectifier under unbalanced input phase voltages in wide acinput frequency application is proposed. The control strategy is simple andeasy to be realized in digital. The experimental results show that thesinusoidal input currents can be obtained when input phase voltages areunbalanced in wide ac input frequency application.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Feiming Liu, Jianping Xu, Zhengge Chen, Rui Huang, Xin Chen
Summary: This article proposes a zero-voltage switching modulation scheme with constant switching frequency and simple real-time calculation to minimize the rms inductor current. By using a 2-D look-up table within a small range of input and output voltage, the proposed scheme achieves minimized inductor current. The derived zero-voltage switching conditions are accurate and simple, providing additional assistance in minimizing the rms inductor current.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ping Yang, Shungang Xu, Fanwei Meng, Ziyue Zhang, Rongbin Zhou, Jianping Xu
Summary: This paper investigates the suppression of leakage current and double-frequency ripple in PV single-phase inverters. A circuit is proposed that substitutes a bridge arm of the conventional PV grid-connected inverter with a Boost converter, which directly eliminates the leakage current. A suppression strategy for the double-frequency ripple of the proposed topology is also provided. The feasibility of the proposed topology and control strategy is verified through simulation and experimental results.
IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Huan Luo, Buxiang Zhou, Gao Liu, Tianlei Zang, Shi Chen, Xiang Zhou, Jianping Xu
Summary: The LLC resonant converter is a good choice for a single-stage ac-dc converter, as it can achieve power factor correction (PFC) and output voltage regulation, improving efficiency and power density. However, the voltage mode (VM) controlled single-stage half-bridge LLC PFC converter has drawbacks such as a large dead-zone of input current and hard-switching operation. This article presents a modified numerical calculation method to accurately characterize the asymmetrical behavior of resonant current and voltage, deriving the switching frequency for unity power factor (PF). Experimental results with a prototype show that the proposed voltage-mode variable-frequency (VM-VF) controlled LLC resonant PFC converter achieves high efficiency of up to 94.08% and power factor of 0.95 over a wide input voltage range of 180-260 VAC.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yifan Wang, Jianping Xu, Lei Wang, Rui Huang
Summary: A pulse train (PT) control strategy is proposed for autonomous three-phase voltage source inverter (3ph-VSI) in stationary reference frame. The proposed PT control strategy utilizes the combination of two different duty cycles to approximate the desired duty cycles of 3ph-VSI, resulting in regulated load voltage. The control scheme features fast transient performance, simple operation, and easy control loop design.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Yao Wang, Jianping Xu, Zhangyong Chen, Fuban Qin
Summary: In this article, a PCM-controlled SIDO buck LED driver is proposed to achieve independent dimming and eliminate steady-state cross-regulation. The circuit and principle of the driver are presented, and its small signal model is established. Control parameters and capacitor parameters are analyzed to investigate their effects on the driver's performance and stability. Experimental results validate the effectiveness and stability of the designed driver.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Haibin Cao, Ping Yang, Xia Guo, Rui Huang, Jianping Xu
Summary: In this letter, an improved asymmetric modulation is proposed to suppress the CM noise in high power density three-phase current-source rectifiers. The experimental results of a 1 kW prototype verify the effectiveness of the proposed method in reducing voltage stress on the switching devices.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Xiaoqiang Wang, Minrui Leng, Xin Zhang, Hao Ma, Bin Guo, Jianping Xu, Chi-Kwan Lee
Summary: This article explores the systematic synthesis of primary high-order compensation topology (PHCT) for wireless charging system and its applicability to subharmonic control (SHC). It reveals that four types of PHCTs are superior in performance when applied with SHC. Furthermore, experimental results on a prototype with jointly applying SHC and PHCT are examined.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Xi Chen, Ping Yang, Yusheng Peng, Mixin Wang, Fuping Hu, Jianping Xu
Summary: In order to balance the power difference between the pulsed output power and the constant input power in the pulse load power supply (PLPS), an active capacitor converter (ACC) is connected to the output of the dc-dc converter. A virtual impedance consisting of multiple quasi-notch-filters is proposed to provide lower impedance at the frequencies with high harmonic content in the load current, and it is implemented by the output voltage feedforward control of the ACC. The validity of the proposed control scheme is verified through experiments with a synchronous rectifier buck converter.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Song Lu, Hongbo Ma, Xiaoqiang Wang, Junhong Yi, Tianyi Zhang, Jianping Xu, Quanyuan Feng
Summary: This article proposes a new type of single-stage ac/dc converter that integrates interleaved power factor correction (PFC) and resonant dc/dc circuits to address the high bus issue of conventional boost or buck-boost PFC integrated resonant single-stage converters under high-voltage input. The proposed three interleaved PFC structures divide the ac input voltage into two parts by two capacitors before the rectifier bridge, omitting the need for two high-frequency power diodes and one filter capacitor. The reduced bus voltage can be obtained with fewer devices, achieving better zero-crossing performance of input current, increased circuit efficiency, and at least a 2.3% improvement in efficiency under 220V nominal input and 100W load conditions, all while maintaining reduced bus voltage and similar power factor values.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Automation & Control Systems
Ping Yang, Yusheng Peng, Yijie Sun, Hongchen Liu, Jianping Xu
Summary: This article introduces the current-source charge pump (CS-CP) power factor correction (PFC) converter and its limitations, and proposes a solution of a variable turn ratio CS-CP PFC converter to achieve high power factor over a wide input voltage range by adjusting the turn ratio.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)