▶4 issues per year◀
CPSS Transactions on Power Electronics and Applications is sponsored and published by China Power Supply Society and technically co-sponsored by IEEE Power Electronics Society. It publishes original and high-quality peer-reviewed papers in the field of power electronics and its applications. With the goal of promoting the technology of power electronics including concepts, theory, modeling and control, analysis and simulation, emerging technology and applications, CPSS TPEA is expected to be a favorable platform to strengthen information exchange in this area. All accepted papers will be published in IEEE Xplore and be indexed in Ei Compendex.
Switching Power Supply: DC/DC Converter, Power Factor Correction Converter
Inverter and Control: DC/AC Inverter, Modulation and Control
Power Devices and Applications: Si, SiC and GaN Devices
Magnetics, Passive Integration, Magnetics for Wireless and EMI
Control, Modeling, Simulation, System Stability and Reliability
Conversion Technologies for Renewable Energy and Energy Saving
Power Electronics Applied to Transmission and Distribution Systems
Power Electronics Applied to Electric Vehicles and Railway Systems
Power Electronics Applied in Lighting and Consumer Electronics
Deadline for Submission of Manuscripts: May 1, 2022
Guest Editor-in-Chief: Xu Yang, Xi’an Jiaotong University, China
Guest Co-Editor-in-Chief: Haoyu Wang, ShanghaiTech University, China
CPSS TPEA Vol.6 No.4 (December 30, 2021)
Yuqi WEI, Quanming LUO, and Homer Alan MANTOOTH
Abstract To achieve the constant current (CC) and constant voltage (CV) charge of the lithium battery, the traditional LLC resonant converter requires the switching frequency varies in a wide range, which brings difficulty to the magnetic components design, and the system efficiency would also be degraded. In this article, a novel topology based on LLC and LCL-T resonant tanks is proposed to reduce the range of operating switching frequency. During the CC charge state, the proposed converter is operating with the LCL-T resonant tank, and it can be regarded as a current source, which provides constant charging current to the battery. During the CV charge state, the LCL-T resonant tank is bypassed and the structure of the proposed converter is modified to a traditional LLC resonant converter, and it is functioning as a CV source. Owing to the high accuracy of the CC and voltage sources, the required operating switching frequency range can be significantly reduced when compared with traditional LLC approaches. Operational principles and design guidelines for the proposed converter are described. Experiment and simulation results from a 180 W prototype are provided to validate the theoretical analysis.
Xiaojiao CHEN, Liansheng HUANG, Shiying HE, Ying ZUO, Jinlin CHEN, and Yang CHEN
Abstract The International Thermonuclear Experimental Reactor (ITER) poloidal field (PF) AC/DC converters are composed by thyristor-based phase controlled converter modules. As the core component of ITER PF AC/DC converter, the thyristor is very sensitive to over-voltage and damaged in microseconds, therefore, the transient over-voltage protection strategy is desperately essential to ensure the converter safety operation. In this paper, a nanosecond respond and high reliability protection strategy which combined by Metal Oxide Varistor (MOV) and external bypass is proposed to protect the ITER PF AC/DC converter from transient DC over-voltage. The MOV is designed to certify the fast respond in nanosecond. Moreover, a bidirectional BreakOver Diode (BOD) circuit board is designed to activate external bypass to ensure the reliability of the transient DC over-voltage protection strategy. The performance-testing platform is built to study its performance. The experiments on ITER PF AC/DC converter test facility are carried out. According to the experiment results, the external bypass is triggered by BOD board effectively and the load current is transferred to the external bypass in 2 us when BOD suffers from an over-voltage. The effectiveness of the proposed transient DC over-voltage protection strategy is verified.
Yiming ZHANG, Shuxin CHEN, Xin LI, and Yi TANG
Abstract Recent years have witnessed the booming development of wireless power transfer (WPT) via magnetic induction, which has the advantages of convenience, safety, and feasibility to special occasions. WPT can be applied to electric vehicles and ships, where high-power WPT technology is required to shorten the charging time with the increasing battery capacity. This paper reviews the state-of-the-art development of high-power static WPT systems via magnetic induction. Selected prototypes and demos of high-power WPT systems are demonstrated with key transfer characteristics and solutions. Theoretical foundation of magnetically coupled WPT systems is analyzed and the maximum power capability of coils is derived. Compensation topologies suitable for high-power applications are discussed. Four basic planar coils, namely the bipolar coil, the square coil, the circular coil, and the rectangular coil, are simulated and compared. The state-of-the-art silicon carbide MOSFET development is introduced. The power electronics converters with power elevation techniques, including cascading, paralleling and inductive elevation, are investigated. Future development of high-power WPT systems is discussed.
Xiaoyu JIA, Changsheng HU, Bitao DONG, Fengchun HE, Hui WANG, and Dehong XU
Abstract This paper investigates the influences of system layout on common mode (CM) EMI noise of an electric vehicle (EV) powertrain with a traction inverter using silicon carbide (SiC) MOSFETs. First, a system level conducted EMI model for the whole SiC EV powertrain is presented, which includes a battery pack, DC cables, a SiC inverter, AC cables, and a PMSM. Then, the impacts of system layout, such as the AC cable length, the AC cable type, and the DC cable type (shielded cable and unshielded cable) on CM EMI noise are analyzed through time domain simulations of the system level conducted EMI model. Next, a conducted EMI emission test-bed for a SiC EV powertrain is built. Finally, experiments on the test-bed are carried out to verify the influences of system layout on CM EMI noise in the SiC EV powertrain.
Faxiang PENG, Yiqing LU, Mingde ZHOU, and Haoyu WANG
Abstract In this manuscript, an advanced battery equalizer with open-loop control is proposed. This equalizer is based on a two-layer hierarchical modular architecture. The top string to-module (S2M) layer consists of a half-bridge inverter and a voltage multiplier (VM) rectifier, and the bottom cell-to-cell (C2C) layer is implemented by bidirectional buck-boost units. Without state-of-charge (SOC) estimation, the battery charge can be automatically transferred from high-voltage cell-modules/cells to low-voltage ones. Only a pair of symmetrical pulse width modulation(PWM) driving signals with fixed switching frequency and duty cycle are required.This reduces the control complexity remarkably. Meanwhile, the balancing current of each balancing path naturally attenuates with the convergence of cell-module/cell voltages. This ensures a fast balancing of cell-module/cell with large voltage mismatch. The battery-recovery-effect induced balancing error is also effectively mitigated. Moreover, simple control facilitates a simultaneous module and cell voltage balancing in static, charging, and discharging conditions. The operation principles are analyzed in detail. An experimental platform with eight series-connected batteries is built and tested. The measured results well validate the theoretical analysis. Both cell and module voltages automatically converge with clearly mitigated recovery effect.
Yukun LUO, M A AWAL, Wensong YU, and Iqbal HUSAIN
Abstract Field-programmable gate array (FPGA) is a powerful platform that can play an essential role in high-performance digital control of power electronics systems. However, the FPGA system’s design is quite different from that of a traditional microprocessor or a digital signal processor (DSP). Instead of sequential programming using high-level languages, such as C/C++, FPGA controller implementation requires a hardware description language(HDL) such as Verilog and VHDL, which requires extensive verification and optimization during the design process. This paper proposes a systematic FPGA design methodology with optimum resource utilization for rapid prototyping of high-performance power electronics applications to facilitate the wide spread adoption of FPGA technology in power electronics. The FPGA controller design is concurrent with the power stage and utilizes high-level synthesis (HLS) tools and Simulink code-style generation toolbox. This paper covers the detailed design, implementation, and experimental validation of two specific applications, i.e., an active power filter (APF) and a motor emulator (ME), demonstrating the generalized features of the methodology. Employing fundamentally different control structures, both application examples achieve ultra-high current control bandwidth leveraging SiC MOSFETs switching at no less than 100 kHz.
Yuqi WEI, Quanming LUO, and Homer Alan MANTOOTH
Abstract Conventional line frequency transformers have the disadvantages of large volume and low efficiency. The mediumor high frequency transformers based on power converters can achieve high power conversion with small footprint have drawn popularity in numerous industrial applications. Unregulated resonant converters, LLC and CLLC resonant converters, with fixed voltage conversion ratio operating at resonant frequency, which are also known as DC transformers (DCXs), are attractive owning to their high efficiency characteristic. Nevertheless, thereare issues associated with DCXs in real applications. Regulation capability and automatic resonant frequency tracking capability are the two most important issues for DCXs. The main work ofthis paper is to characterize the resonant converters based DCXs,and overview the issues and solutions associated with DCXs. Guidelines can be provided for researchers and engineers when designing the resonant converters based DCXs.
Jiawen WU, Yu QI, Faheem MUHAMMAD, and Xinke WU
Abstract Recently, multilevel converters with gallium nitride (GaN) devices have shown marvelous advantages for power factor correction (PFC) conversion to meet the increasingly higher efficiency and power density requirements. In the traditional design process for the multilevel PFC converter, it is necessary to separately optimize the devices of the corresponding breakdown voltage under different level number, which causes difficulty to the overall optimization of the entire system. In this paper, a unified minimum loss model for GaN switches regardless of voltage levels is proposed to optimize the efficiency based on device’s new figure-of-merit (NFoM) (NFoM = COSS(ER) RDS(on)). With the help of this unified minimum loss model, it simplifies the efficiency optimizing methodology according to the NFoMs of GaN devices for multilevel PFC converter. According to the methodology, a 2 kW cascaded H-bridge (CHB) PFC prototype is constructed to verify the design methodology, achieving over 99% efficiency with power density over 1000 W/in3 .
Alex Q. Huang, Qianlai Zhu, Li Wang, and Liqi Zhang
Qingyun Huang and Alex Q. Huang
Yongheng Yang, Ariya Sangwongwanich, Frede Blaabjerg
Thomas M. Jahns and Hang Dai
Hirofumi Akagi, Shin-ichi Kinouchi, and Yuji Miyazaki
Fred C. Lee, Qiang Li, Zhengyang Liu, Yuchen Yang, Chao Fei, and Mingkai Mu
Philip T. Krein
Bo Wang, Jie Cai, Xiong Du, and Luowei Zhou
Katherine A. Kim, Yu-Chen Liu, Ming-Cheng Chen, and Huang-Jen Chiu
Jonas E. Huber, Julian Böhler, Daniel Rothmund, and Johann W. Kolar
Prof. LIU Jinjun
College of Electrical Engineering
Xi'an Jiaotong University
No.28, Xianning West Road, Xi'an,
Shaanxi, 710049, China
China Power Supply Society (CPSS)
Technically sponsored by
IEEE Power Electronics Society (IEEE PELS)
Sungrow Power Supply Co., Ltd.
Xiamen Kehua Hengsheng Co., Ltd.
Shenzhen Inovance Technology Co., Ltd.
StarPower Semiconductor Ltd.
China Power Supply Society (CPSS)
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