Article
Engineering, Electrical & Electronic
Xiqi Wu, Rui Li, Xu Cai
Summary: This article proposes a modified LLC resonant converter with an LC antiresonant circuit in the parallel branch. Compared to the LLC resonant converter, this new design reduces the equivalent inductance of the parallel branch at increasing switching frequencies. The proposed converter also optimizes the resonant parameters in the parallel branch to achieve a close-to-sine-wave magnetizing current and reduce conduction losses. Experimental results show the feasibility of this design and its advantages over the LLC resonant converter.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Gengning Ying, Jun Zeng, Renjun Hu, Junfeng Liu
Summary: In this study, a novel high-voltage gain DC-DC converter with series LC quasi-resonant boost stages is proposed. The converter achieves high efficiency and high step-up ratio through the use of quasi-resonant operation, zero current switching, and zero voltage switching. It also has the capability to further increase the voltage gain in emergency situations, and offers advantages in terms of simplified driver and transformer-less applications.
JOURNAL OF POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Fang Liu, Jianghu Wan, Li Jiang, Yong Li, Kang-Zhi Liu
Summary: This article presents a soft-switching full-bridge AC-DC converter with a simple active auxiliary branch. The converter achieves zero voltage switching and zero current switching conditions through the use of auxiliary switches and inductors. A clamping technique is employed to mitigate the voltage stresses caused by resonance. The proposed converter demonstrates high efficiency and outstanding performance.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ziheng Xiao, Zhixing He, Renfeng Guan, An Luo
Summary: This article presents a novel time domain analysis method for LLC resonant converters, which takes into account the impact of parasitic capacitors of MOSFETs and diodes, stray capacitor of high frequency transformer, and dead time. The accurate steady state resonant waveforms and ZVS-ON boundary can be obtained using this method, guiding the parameter design and frequency/dead time configuration.
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
Hong Li, Haitao Du, Yangbin Zeng, Zhidong Qiu, Xiaheng Jiang, Ziqi Chen
Summary: In this paper, a modified interleaved capacitor clamped (MICC) dc-dc converter with non-resonant soft-switching (NRSS) is proposed. By using an auxiliary inductor, the converter achieves zero-current switching for all switches and diodes. The converter consists of an interleaved boost structure as the front stage and the MICC structure with NRSS as the output stage, reducing current ripple and stress on components, and achieving high voltage gain.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Chemistry, Analytical
Hung-Liang Cheng, Lain-Chyr Hwang, Heidi H. Chang, Qi-You Wang, Chun-An Cheng
Summary: A novel interleaved DC-DC buck converter is proposed in this study for driving high-brightness LEDs. The converter configuration utilizes parallel buck converters with interleaved operation and a coupled inductor for improved power capability and efficiency. Experimental results demonstrate satisfactory performance.
Article
Engineering, Electrical & Electronic
Zijiang Yang, Jack Forrester, Jonathan N. Davidson, Martin P. Foster, David A. Stone
Summary: This study introduces a novel methodology for predicting the performance of inductorless-driven piezoelectric transformer-based H-bridge inverters in achieving zero-voltage switching (ZVS) and output regulation simultaneously. By controlling the deadtime interval, a new approach for output voltage regulation is proposed. The model derived through cyclic-mode analysis is used to estimate circuit parameters and demonstrate operation in the ZVS region, with output voltage regulation profile presented. The proposed method is verified through SPICE simulation and experimental results, showing the ability to achieve a 5-V output from 15 to 60 V input with simultaneous ZVS and voltage regulation.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Ravichandra Maddipudi, Nareshkumar Kummari, Souvik Chattopadhyay
Summary: In this article, a modulation strategy is presented to solve the voltage overshoot problem in the step voltage switched secondary-side phase-shifted dc-dc converter for bidirectional power flow. This problem is caused by the resonance between the transformer leakage inductance and the output capacitance of the converter's current-fed side transistor. Various snubber/clamp circuits have been discussed to suppress this voltage overshoot, but they affect the converter's efficiency due to power loss. The proposed bidirectional converter eliminates the voltage overshoot problem and achieves soft-switching, resulting in a peak efficiency of 96%. The feasibility of the proposed work is proven through experimental testing.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Jingxiang Gao, Junhong Zhang, Qingguo Song, Zhongni Zhu, Liang Qian
Summary: This article proposes a single-stage inverter with the LLC topology, utilizing a hybrid control strategy and topology-morphing to achieve narrow frequency range and full soft-switching. The operating principles and characteristics are analyzed in detail, and key parameters are designed. Experimental results demonstrate that the proposed inverter, with an input of 480 V and output of 220 V/50 Hz, achieves a maximum efficiency of 97.6%.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Bo Li, Ping Wang, Zhishuang Wang, Xiaochen Ma, Huakun Bi
Summary: This paper introduces a new soft switching high voltage gain interleaved dc-dc converter for fuel cell vehicles, featuring low input current ripple and high voltage gain. By using a simple auxiliary circuit, all power switches can operate under soft switching conditions effectively. The proposed converter's main characteristics are validated through a 1-kW laboratory prototype.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Salah Alatai, Mohamed Salem, Ibrahim Alhamrouni, Dahaman Ishak, Ali Bughneda, Mohamad Kamarol
Summary: A design proposal for a five-level LLC resonant DC-DC converter for battery chargers is presented in this paper. The proposed converter achieves high frequency operation and soft switching through a transform-less LLC resonant tank. It has advantages in terms of weight, size, cost, and implementation simplicity, while ensuring smooth energy conversion and higher power density and efficiency.
Article
Engineering, Electrical & Electronic
Qinglin Zhao, Jianmeng Zhang, Yuxia Gao, Deyu Wang, Qiuxia Yang
Summary: This article proposes a multimode hybrid LLC resonant converter with a wide output voltage range. The converter can operate in three different modes: low-gain mode, medium-gain mode, and high-gain mode, by controlling the drive signals of the primary switches. Variable frequency modulation is used in each mode, allowing for a smooth transition and achieving an ultra-wide output voltage range. The prototype of the proposed converter demonstrates good efficiency performance over the entire voltage range, with a peak efficiency of 97.5%.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Reza Rezaii, Sumana Ghosh, Md Safayatullah, Seyed Milad Tayebi, Issa Batarseh
Summary: This paper proposes a quad-input LLC converter for photovoltaic applications. The converter utilizes a single LLC resonant tank to transfer energy from four PV panels to the output. The independent maximum power point tracking (MPPT) for all PV panels is ensured by a proposed MPPT control strategy. The topology achieves zero-voltage switching (ZVS) for a wide input range and load variations.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Automation & Control Systems
Mohsen Packnezhad, Hosein Farzanehfard
Summary: This article proposes a family of nonisolated zero voltage switching bidirectional dc-dc converters with simple auxiliary circuit and continuous current at low voltage side source. The auxiliary circuit, consisting of a single switch, a capacitor, and a small inductor, enables soft switching for all semiconductor elements. The converters achieve a suitable overall efficiency by maintaining continuous current at the low voltage side, turning the main and auxiliary switches on and off at zero voltage switching, and mitigating the reverse recovery problem with zero current switching for all diodes. A 100W converter prototype is implemented to verify the theoretical analysis and main converter features.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Multidisciplinary
Tomokazu Mishima, Yuki Nakagawa, Mutsuo Nakaoka
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2015)
Article
Automation & Control Systems
Tomokazu Mishima, Eitaro Morita
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2017)
Article
Automation & Control Systems
Tomokazu Mishima, Shuichi Sakamoto, Chiaki Ide
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2017)
Article
Engineering, Electrical & Electronic
Tomokazu Mishima
ELECTRONICS AND COMMUNICATIONS IN JAPAN
(2018)
Article
Green & Sustainable Science & Technology
Chia-Hsuan Wu, Ching-Ming Lai, Tomokazu Mishima, Zheng-Bo Liang
Summary: This paper investigates a 22 kW high-power wireless power transfer (WPT) system for electric vehicles battery charging. The proposed system utilizes a three-phase half-bridge LC-LC resonant power converter and a sandwich wound coil set. Through simulations and adjustments, the system achieved a high power transfer efficiency of 93.47% at an operating frequency of 85 kHz with a 170 mm air gap between coils, demonstrating the feasibility of a simulation-assisted design approach for high-power and high-efficiency WPT systems.
Proceedings Paper
Energy & Fuels
Yoichiro Tabata, Tomokazu Mishima, Tatsuya Kido
2018 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-NIIGATA 2018 -ECCE ASIA)
(2018)
Proceedings Paper
Energy & Fuels
Tomokazu Mishima
2018 INTERNATIONAL POWER ELECTRONICS CONFERENCE (IPEC-NIIGATA 2018 -ECCE ASIA)
(2018)
Proceedings Paper
Energy & Fuels
Tomokazu Mishima, Eitaro Morita
2017 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2017)
Article
Engineering, Electrical & Electronic
Tomokazu Mishima, Souta Morinaga, Mutsuo Nakaoka
ELECTRICAL ENGINEERING IN JAPAN
(2017)
Article
Engineering, Electrical & Electronic
Tomokazu Mishima, Hiroto Mizutani, Mutsuo Nakaoka
ELECTRICAL ENGINEERING IN JAPAN
(2017)
Proceedings Paper
Energy & Fuels
Tomokazu Mishima, Eitaro Morita
2017 THIRTY SECOND ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION (APEC)
(2017)
Proceedings Paper
Energy & Fuels
Shuichi Sakamoto, Tomokazu Mishima, Chiaki Ide
2016 IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION (ECCE)
(2016)
Proceedings Paper
Energy & Fuels
Kyohei Konishi, Tomokazu Mishima, Mutsuo Nakaoka
APEC 2016 31ST ANNUAL IEEE APPLIED POWER ELECTRONICS CONFERENCE AND EXPOSITION
(2016)
Proceedings Paper
Automation & Control Systems
Tomokazu Mishima, Souta Morinaga, Mutsuo Nakaoka
IECON 2015 - 41ST ANNUAL CONFERENCE OF THE IEEE INDUSTRIAL ELECTRONICS SOCIETY
(2015)
