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  Subjects -> ELECTRONICS (Total: 207 journals)
Showing 1 - 200 of 277 Journals sorted alphabetically
Acta Electronica Malaysia     Open Access  
Advanced Materials Technologies     Hybrid Journal   (Followers: 1)
Advances in Biosensors and Bioelectronics     Open Access   (Followers: 8)
Advances in Electrical and Electronic Engineering     Open Access   (Followers: 9)
Advances in Electronics     Open Access   (Followers: 100)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Microelectronic Engineering     Open Access   (Followers: 13)
Advances in Power Electronics     Open Access   (Followers: 41)
Advancing Microelectronics     Hybrid Journal  
American Journal of Electrical and Electronic Engineering     Open Access   (Followers: 28)
Annals of Telecommunications     Hybrid Journal   (Followers: 8)
APSIPA Transactions on Signal and Information Processing     Open Access   (Followers: 8)
Archives of Electrical Engineering     Open Access   (Followers: 16)
Australian Journal of Electrical and Electronics Engineering     Hybrid Journal  
Batteries     Open Access   (Followers: 9)
Batteries & Supercaps     Hybrid Journal   (Followers: 5)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 31)
Bioelectronics in Medicine     Hybrid Journal  
Biomedical Instrumentation & Technology     Hybrid Journal   (Followers: 6)
BULLETIN of National Technical University of Ukraine. Series RADIOTECHNIQUE. RADIOAPPARATUS BUILDING     Open Access   (Followers: 2)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 47)
China Communications     Full-text available via subscription   (Followers: 9)
Chinese Journal of Electronics     Hybrid Journal  
Circuits and Systems     Open Access   (Followers: 15)
Consumer Electronics Times     Open Access   (Followers: 5)
Control Systems     Hybrid Journal   (Followers: 308)
ECTI Transactions on Computer and Information Technology (ECTI-CIT)     Open Access  
ECTI Transactions on Electrical Engineering, Electronics, and Communications     Open Access   (Followers: 2)
Edu Elektrika Journal     Open Access   (Followers: 1)
Electrica     Open Access  
Electronic Design     Partially Free   (Followers: 124)
Electronic Markets     Hybrid Journal   (Followers: 7)
Electronic Materials Letters     Hybrid Journal   (Followers: 4)
Electronics     Open Access   (Followers: 109)
Electronics and Communications in Japan     Hybrid Journal   (Followers: 10)
Electronics For You     Partially Free   (Followers: 103)
Electronics Letters     Hybrid Journal   (Followers: 26)
Elektronika ir Elektortechnika     Open Access   (Followers: 2)
Elkha : Jurnal Teknik Elektro     Open Access  
Emitor : Jurnal Teknik Elektro     Open Access   (Followers: 3)
Energy Harvesting and Systems     Hybrid Journal   (Followers: 4)
Energy Storage     Hybrid Journal   (Followers: 1)
Energy Storage Materials     Full-text available via subscription   (Followers: 4)
EPE Journal : European Power Electronics and Drives     Hybrid Journal  
EPJ Quantum Technology     Open Access   (Followers: 1)
EURASIP Journal on Embedded Systems     Open Access   (Followers: 11)
Facta Universitatis, Series : Electronics and Energetics     Open Access  
Foundations and Trends® in Communications and Information Theory     Full-text available via subscription   (Followers: 6)
Foundations and Trends® in Signal Processing     Full-text available via subscription   (Followers: 9)
Frequenz     Hybrid Journal   (Followers: 1)
Frontiers of Optoelectronics     Hybrid Journal   (Followers: 1)
IACR Transactions on Symmetric Cryptology     Open Access   (Followers: 1)
IEEE Antennas and Propagation Magazine     Hybrid Journal   (Followers: 102)
IEEE Antennas and Wireless Propagation Letters     Hybrid Journal   (Followers: 81)
IEEE Embedded Systems Letters     Hybrid Journal   (Followers: 57)
IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology     Hybrid Journal   (Followers: 3)
IEEE Journal of Emerging and Selected Topics in Power Electronics     Hybrid Journal   (Followers: 52)
IEEE Journal of the Electron Devices Society     Open Access   (Followers: 9)
IEEE Journal on Exploratory Solid-State Computational Devices and Circuits     Hybrid Journal   (Followers: 1)
IEEE Letters on Electromagnetic Compatibility Practice and Applications     Hybrid Journal   (Followers: 4)
IEEE Magnetics Letters     Hybrid Journal   (Followers: 7)
IEEE Nanotechnology Magazine     Hybrid Journal   (Followers: 42)
IEEE Open Journal of Circuits and Systems     Open Access   (Followers: 3)
IEEE Open Journal of Industry Applications     Open Access   (Followers: 3)
IEEE Open Journal of the Industrial Electronics Society     Open Access   (Followers: 3)
IEEE Power Electronics Magazine     Full-text available via subscription   (Followers: 77)
IEEE Pulse     Hybrid Journal   (Followers: 5)
IEEE Reviews in Biomedical Engineering     Hybrid Journal   (Followers: 23)
IEEE Solid-State Circuits Letters     Hybrid Journal   (Followers: 3)
IEEE Solid-State Circuits Magazine     Hybrid Journal   (Followers: 13)
IEEE Transactions on Aerospace and Electronic Systems     Hybrid Journal   (Followers: 369)
IEEE Transactions on Antennas and Propagation     Full-text available via subscription   (Followers: 74)
IEEE Transactions on Automatic Control     Hybrid Journal   (Followers: 64)
IEEE Transactions on Autonomous Mental Development     Hybrid Journal   (Followers: 8)
IEEE Transactions on Biomedical Engineering     Hybrid Journal   (Followers: 39)
IEEE Transactions on Broadcasting     Hybrid Journal   (Followers: 13)
IEEE Transactions on Circuits and Systems for Video Technology     Hybrid Journal   (Followers: 26)
IEEE Transactions on Consumer Electronics     Hybrid Journal   (Followers: 46)
IEEE Transactions on Electron Devices     Hybrid Journal   (Followers: 19)
IEEE Transactions on Geoscience and Remote Sensing     Hybrid Journal   (Followers: 228)
IEEE Transactions on Haptics     Hybrid Journal   (Followers: 5)
IEEE Transactions on Industrial Electronics     Hybrid Journal   (Followers: 75)
IEEE Transactions on Industry Applications     Hybrid Journal   (Followers: 40)
IEEE Transactions on Information Theory     Hybrid Journal   (Followers: 27)
IEEE Transactions on Learning Technologies     Full-text available via subscription   (Followers: 12)
IEEE Transactions on Power Electronics     Hybrid Journal   (Followers: 80)
IEEE Transactions on Services Computing     Hybrid Journal   (Followers: 4)
IEEE Transactions on Signal and Information Processing over Networks     Hybrid Journal   (Followers: 13)
IEEE Transactions on Software Engineering     Hybrid Journal   (Followers: 79)
IEEE Women in Engineering Magazine     Hybrid Journal   (Followers: 11)
IEEE/OSA Journal of Optical Communications and Networking     Hybrid Journal   (Followers: 16)
IEICE - Transactions on Electronics     Full-text available via subscription   (Followers: 12)
IEICE - Transactions on Information and Systems     Full-text available via subscription   (Followers: 5)
IET Cyber-Physical Systems : Theory & Applications     Open Access   (Followers: 1)
IET Energy Systems Integration     Open Access   (Followers: 1)
IET Microwaves, Antennas & Propagation     Hybrid Journal   (Followers: 36)
IET Nanodielectrics     Open Access  
IET Power Electronics     Hybrid Journal   (Followers: 61)
IET Smart Grid     Open Access   (Followers: 1)
IET Wireless Sensor Systems     Hybrid Journal   (Followers: 18)
IETE Journal of Education     Open Access   (Followers: 4)
IETE Journal of Research     Open Access   (Followers: 11)
IETE Technical Review     Open Access   (Followers: 13)
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems)     Open Access   (Followers: 3)
Industrial Technology Research Journal Phranakhon Rajabhat University     Open Access  
Informatik-Spektrum     Hybrid Journal   (Followers: 2)
Instabilities in Silicon Devices     Full-text available via subscription   (Followers: 1)
Intelligent Transportation Systems Magazine, IEEE     Full-text available via subscription   (Followers: 14)
International Journal of Advanced Research in Computer Science and Electronics Engineering     Open Access   (Followers: 18)
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems     Open Access   (Followers: 12)
International Journal of Antennas and Propagation     Open Access   (Followers: 11)
International Journal of Applied Electronics in Physics & Robotics     Open Access   (Followers: 4)
International Journal of Computational Vision and Robotics     Hybrid Journal   (Followers: 5)
International Journal of Control     Hybrid Journal   (Followers: 11)
International Journal of Electronics     Hybrid Journal   (Followers: 7)
International Journal of Electronics and Telecommunications     Open Access   (Followers: 13)
International Journal of Granular Computing, Rough Sets and Intelligent Systems     Hybrid Journal   (Followers: 3)
International Journal of High Speed Electronics and Systems     Hybrid Journal  
International Journal of Hybrid Intelligence     Hybrid Journal  
International Journal of Image, Graphics and Signal Processing     Open Access   (Followers: 16)
International Journal of Microwave and Wireless Technologies     Hybrid Journal   (Followers: 10)
International Journal of Nanoscience     Hybrid Journal   (Followers: 1)
International Journal of Numerical Modelling: Electronic Networks, Devices and Fields     Hybrid Journal   (Followers: 4)
International Journal of Power Electronics     Hybrid Journal   (Followers: 25)
International Journal of Review in Electronics & Communication Engineering     Open Access   (Followers: 4)
International Journal of Sensors, Wireless Communications and Control     Hybrid Journal   (Followers: 10)
International Journal of Systems, Control and Communications     Hybrid Journal   (Followers: 4)
International Journal of Wireless and Microwave Technologies     Open Access   (Followers: 6)
International Transaction of Electrical and Computer Engineers System     Open Access   (Followers: 2)
JAREE (Journal on Advanced Research in Electrical Engineering)     Open Access  
Journal of Biosensors & Bioelectronics     Open Access   (Followers: 4)
Journal of Advanced Dielectrics     Open Access   (Followers: 1)
Journal of Artificial Intelligence     Open Access   (Followers: 12)
Journal of Circuits, Systems, and Computers     Hybrid Journal   (Followers: 4)
Journal of Computational Intelligence and Electronic Systems     Full-text available via subscription   (Followers: 1)
Journal of Electrical and Electronics Engineering Research     Open Access   (Followers: 38)
Journal of Electrical Bioimpedance     Open Access  
Journal of Electrical Bioimpedance     Open Access   (Followers: 2)
Journal of Electrical Engineering & Electronic Technology     Hybrid Journal   (Followers: 7)
Journal of Electrical, Electronics and Informatics     Open Access  
Journal of Electromagnetic Analysis and Applications     Open Access   (Followers: 8)
Journal of Electromagnetic Waves and Applications     Hybrid Journal   (Followers: 9)
Journal of Electronic Design Technology     Full-text available via subscription   (Followers: 6)
Journal of Electronic Science and Technology     Open Access   (Followers: 1)
Journal of Electronics (China)     Hybrid Journal   (Followers: 5)
Journal of Energy Storage     Full-text available via subscription   (Followers: 4)
Journal of Engineered Fibers and Fabrics     Open Access   (Followers: 2)
Journal of Field Robotics     Hybrid Journal   (Followers: 4)
Journal of Guidance, Control, and Dynamics     Hybrid Journal   (Followers: 190)
Journal of Information and Telecommunication     Open Access   (Followers: 1)
Journal of Intelligent Procedures in Electrical Technology     Open Access   (Followers: 3)
Journal of Low Power Electronics     Full-text available via subscription   (Followers: 10)
Journal of Low Power Electronics and Applications     Open Access   (Followers: 10)
Journal of Microelectronics and Electronic Packaging     Hybrid Journal   (Followers: 1)
Journal of Microwave Power and Electromagnetic Energy     Hybrid Journal   (Followers: 3)
Journal of Microwaves, Optoelectronics and Electromagnetic Applications     Open Access   (Followers: 11)
Journal of Nuclear Cardiology     Hybrid Journal  
Journal of Optoelectronics Engineering     Open Access   (Followers: 4)
Journal of Physics B: Atomic, Molecular and Optical Physics     Hybrid Journal   (Followers: 32)
Journal of Power Electronics     Hybrid Journal   (Followers: 2)
Journal of Power Electronics & Power Systems     Full-text available via subscription   (Followers: 11)
Journal of Semiconductors     Full-text available via subscription   (Followers: 5)
Journal of Sensors     Open Access   (Followers: 27)
Journal of Signal and Information Processing     Open Access   (Followers: 8)
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer     Open Access  
Jurnal Rekayasa Elektrika     Open Access  
Jurnal Teknik Elektro     Open Access  
Jurnal Teknologi Elektro     Open Access  
Kinetik : Game Technology, Information System, Computer Network, Computing, Electronics, and Control     Open Access  
Majalah Ilmiah Teknologi Elektro : Journal of Electrical Technology     Open Access   (Followers: 2)
Metrology and Measurement Systems     Open Access   (Followers: 6)
Microelectronics and Solid State Electronics     Open Access   (Followers: 28)
Nanotechnology, Science and Applications     Open Access   (Followers: 6)
Nature Electronics     Hybrid Journal   (Followers: 1)
Networks: an International Journal     Hybrid Journal   (Followers: 5)
Open Electrical & Electronic Engineering Journal     Open Access  
Open Journal of Antennas and Propagation     Open Access   (Followers: 8)
Paladyn. Journal of Behavioral Robotics     Open Access   (Followers: 1)
Power Electronics and Drives     Open Access   (Followers: 2)
Problemy Peredachi Informatsii     Full-text available via subscription  
Progress in Quantum Electronics     Full-text available via subscription   (Followers: 7)
Radiophysics and Quantum Electronics     Hybrid Journal   (Followers: 2)
Recent Advances in Communications and Networking Technology     Hybrid Journal   (Followers: 3)
Recent Advances in Electrical & Electronic Engineering     Hybrid Journal   (Followers: 11)
Research & Reviews : Journal of Embedded System & Applications     Full-text available via subscription   (Followers: 6)
Revue Méditerranéenne des Télécommunications     Open Access  
Security and Communication Networks     Hybrid Journal   (Followers: 2)
Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of     Hybrid Journal   (Followers: 57)
Semiconductors and Semimetals     Full-text available via subscription   (Followers: 1)
Sensing and Imaging : An International Journal     Hybrid Journal   (Followers: 2)
Solid State Electronics Letters     Open Access  
Solid-State Electronics     Hybrid Journal   (Followers: 9)
Superconductor Science and Technology     Hybrid Journal   (Followers: 3)
Synthesis Lectures on Power Electronics     Full-text available via subscription   (Followers: 3)
Technical Report Electronics and Computer Engineering     Open Access  
TELE     Open Access  
Telematique     Open Access  
TELKOMNIKA (Telecommunication, Computing, Electronics and Control)     Open Access   (Followers: 9)
Transactions on Cryptographic Hardware and Embedded Systems     Open Access   (Followers: 2)

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Similar Journals
Journal Cover
IET Power Electronics
Journal Prestige (SJR): 0.803
Citation Impact (citeScore): 3
Number of Followers: 61  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1755-4535 - ISSN (Online) 1755-4543
Published by IET Homepage  [46 journals]
  • Unbalance mitigation strategies in microgrids
    • Authors: A.S. Vijay;Suryanarayana Doolla;Mukul C. Chandorkar;
      Pages: 1687 - 1710
      Abstract: Unbalance or asymmetry in the distribution network is a well-known power quality issue. In the modern active distribution system, with the increasing penetration of renewables, this phenomenon becomes more pronounced. In the context of microgrids (MGs), several works have been proposed for the management and mitigation of the unbalance, for both the sharing of unbalanced load and maintaining the voltage quality in the islanded mode and for the control of distributed generators in the grid-connected mode during unbalanced conditions. This study comprehensively reviews, summarises, and classifies the various strategies of the unbalance mitigation techniques for the islanded and grid-connected modes of operation for three-phase MGs and presents the possible challenges and avenues for future investigations on the topic.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Review of very high frequency power converters and related technologies
    • Authors: Yijie Wang;Oscar Lucia;Zhe Zhang;Yueshi Guan;Dianguo Xu;
      Pages: 1711 - 1721
      Abstract: With the increasing demand for volume reduction and efficiency improvement, very high frequency (VHF) power converters (30-300 MHz) have attracted great interest. Under such high operating frequency conditions, the value and volume of passive components can be greatly reduced, and the power density can be improved. However, many concerns and challenges accompany the increasing operating frequency, such as high switching loss, high magnetic components loss and high driving circuit loss. Including various topologies of the VHF converter, this study reviews the state-of-the-art technology involved in the VHF power converter, also encompassing the inverter stage and matching network stage. Secondly, different magnetic components and semiconductor devices were evaluated under the VHF operating condition. Thirdly, the high-efficiency driving methods, such as the resonant driving method and self-resonant driving method, were demonstrated. A guideline for converter design and system optimisation of the VHF converter and related technologies, including all components and systems, is illustrated in this study. Finally, the future research hot spots and challenges have been pointed out as guidance for further advanced VHF power conversion techniques.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Repeater coil-based wireless power transfer system powering multiple gate
           drivers of series-connected IGBTs
    • Authors: Chenwen Cheng;Chao Wang;Zhe Zhou;Weiguo Li;Zhanfeng Deng;Chunting Chris Mi;
      Pages: 1722 - 1728
      Abstract: It is challenging to power a large number of gate drivers of the series-connected insulated gate bipolar transistors (IGBTs) in a high-voltage application because multiple isolated power supplies are needed. In this study, a novel wireless power transfer (WPT) system using repeater coils is designed to solve this problem. Every two repeater coils form a repeater unit, which transfers power to one load. With multiple repeater units in the system, multiple loads can obtain power simultaneously. To eliminate undesirable magnetic couplings between these coils, bipolar coils are used and the two bipolar coils in the same repeater unit are placed perpendicularly. It is derived that constant voltage can be obtained for all the loads, which is especially suitable for powering the IGBT's gate driver. Moreover, the variation of one load power will not affect others. The receiving circuit is designed to transform the received power to the DC voltage compatible with the driving circuits. An experimental setup with six loads has been constructed to validate the proposed WPT system.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Long-distance wireless power transfer system powering multiple loads with
           constant voltage outputs using S-SP compensation
    • Authors: Chenwen Cheng;Zhe Zhou;Weiguo Li;Jianghua Lu;Zhanfeng Deng;Chunting Chris Mi;
      Pages: 1729 - 1734
      Abstract: This paper proposes a long-distance multi-load wireless power transfer (WPT) system with a constant voltage (CV) output for each load. A repeater unit consisting of two bipolar repeater coils is designed to power the load. Multiple repeater units are placed in a line and the power can be transferred from one unit to the next. Each repeater unit corresponds to one load and multiple loads can be powered simultaneously. The two repeater coils in the same repeater unit are placed perpendicularly to eliminate the magnetic coupling between them. In each repeater unit, a compensation capacitor is placed in series with the transmitting coil while two extra compensation capacitors form a series-parallel (SP) structure for the receiving coil. When neglecting the coil's parasitic resistance, the CV characteristics can be obtained, which enables the independent and flexible power control of each load. Moreover, the influence of the parasitic resistances on the system performance is analysed. Such a system is especially suitable for powering the gate drivers in a high-voltage converter where multiple insulated gate bipolar transistors (IGBTs) are connected in series. An experimental setup with six loads is constructed to validate the proposed system. The maximum system efficiency can reach 88.1%.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Comprehensive comparisons between frequency-domain analysis and
           time-domain analysis for LLC resonant converter
    • Authors: Yuqi Wei;Quanming Luo;Alan Mantooth;
      Pages: 1735 - 1745
      Abstract: LLC resonant converter has been widely used in many applications due to its characteristics of high efficiency and high frequency characteristics. Analysis method plays great role in converter design and operation performance. For LLC resonant converter, the most frequently used analysis methods are frequency-domain analysis (FDA) and time-domain analysis (TDA). FDA assumes that only fundamental harmonics can deliver energy in the system, while TDA is obtained by solving circuit state equations. In this study, comprehensive and complete comparisons between FDA and TDA in terms of analysis methodology, parameter design, analysis accuracy, conduction loss, other power losses, and system efficiency are implemented. The analysis and comparison results show that under the same system specifications, by adopting TDA, a larger magnetising inductance value can be used when compared with FDA, which will reduce the resonant tank circulating current and increase the system efficiency. The comprehensive analysis can provide guidance for engineers when analysing and designing LLC resonant converter. Finally, a 200 W experimental prototype was built and tested to verify the theoretical analysis.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Wide ZVS operation of a semi-dual-bridge resonant converter under
           variable-frequency phase-shift control
    • Authors: Shengzhi Zhou;Xiaodong Li;Zeran Zhong;Xinan Zhang;
      Pages: 1746 - 1755
      Abstract: A secondary phase-shifted dual-bridge converter with semi-active rectifier is able to perform buck-boost dc-dc conversion with soft-switching. However, it can not maintain zero-voltage switching (ZVS) operation for all switches in a wide load range. Besides, the root mean square/peak tank current increases inversely with the decreasing of load in the light load region. To alleviate these problems and extend its load range, a hybrid varying-frequency phase-shift (VFPS) control is proposed to manipulate the power for a semi-dual-bridge converter with the primary half-bridge and secondary semi-active rectifier topology. Steady-state analysis of the converter under VFPS control is performed using the fundamental harmonic approximation approach. A detailed design procedure is given then to find a full ZVS trajectory with a fixed ZVS margin at light load. Experimental results proved that the VFPS control can effectively extend the operation range with full ZVS and maintain high efficiency at light load for the semi-dual-bridge resonant converter.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Analysis and compensation of circulating currents errors in modular
           multilevel converters in low-frequency operation
    • Authors: Muneer Al Sabbagh;Jianyu Pan;Ziwei Ke;Risha Na;Longya Xu;
      Pages: 1756 - 1763
      Abstract: Errors in the injected high-frequency circulating currents are originally investigated for modular multilevel converters (MMCs) in low-speed drive operation. The mathematical analysis reveals that the magnitude and phase errors in the injected circulating currents cause serious energy imbalance in the MMC arms, resulting in large voltage fluctuations in the submodules. Furthermore, these fluctuations get larger when the circulating currents are injected at higher frequencies, which reduces the drive system stability and damages the submodule capacitors. A remedy approach is proposed to minimise the error effects by adjusting the circulating current command. A full-scale system comprising a 1 MVA MMC and a 1 MW induction machine is simulated to verify the theoretical analysis. The experimental investigation of a down-scale MMC feeding an inductor is also conducted to validate the theoretical results.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Negative-sequence voltage elimination for distributed generators in
           grid-feeding operation mode
    • Authors: Juan M. Rey;Miguel Castilla;Jaume Miret;Manel Velasco;Pau Martí;Eduardo Mojica-Nava;
      Pages: 1764 - 1774
      Abstract: A major concern of the power quality in distributed systems is related to the mitigation of voltage imbalances. This function can be implemented directly in the control system of the distributed generation power converters working simultaneously with the standard operation modes. This study presents a negative-sequence voltage elimination technique for distributed generators in grid-feeding operation mode. The proposal guarantees a complete elimination of the negative-sequence voltage, while operating without a priori in-depth knowledge of the grid configuration and its characteristics. The proposed control architecture is presented together with its pseudocode, a controller flowchart and a discussion of the implementation aspects. A closed-loop modelling is derived based on a complex transfer function approach, which is used to determine stability margins and control design guidelines. A laboratory setup was implemented to verify the performance of the proposed strategy.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Cost-effective clamping capacitor boost converter with high voltage gain
    • Authors: Yangbin Zeng;Hong Li;Wencai Wang;Bo Zhang;Trillion Q. Zheng;
      Pages: 1775 - 1786
      Abstract: In renewable energy generation systems, the DC-DC converter with high voltage gain is indispensable, which is used to convert the low output voltage of photovoltaic (PV) cells and fuel cells to the high DC bus voltage. In this study, a cost-effective clamping capacitor boost (CCB) converter with high voltage gain is proposed. In the basis of the conventional boost converter, a clamping capacitor cell with two capacitors and two diodes is embedded. Then, the voltage gain of the proposed CCB converter can be doubled compared with the conventional boost converter. Further, unlike the switched capacitor high voltage gain converter, there is no large current spikes on the capacitors in the proposed CCB converter, which can reduce the current stresses and the costs of capacitors a lot. The operation principles and characteristics of the proposed CCB converter are analysed in detail and verified by simulation. Finally, a 450 W prototype is implemented to validate the performances and advantages of the proposed CCB converter. The proposed CCB converter provides a cost-effective choice for high voltage gain converters in the renewable energy generation system with PV cells.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Bootstrap capacitorless DCM VOT buck converter with dead-time-based
           off-time calibration for magnetic resonance wireless power transfer
    • Authors: Hyunggun Ma;Gyeongho Namgoong;Eunho Choi;Woojin Park;Bonyoung Lee;Heedon Jang;Kyeongmin Park;Kyungmin Na;Franklin Bien;
      Pages: 1787 - 1796
      Abstract: This study reports a miniaturised discontinuous conduction mode (DCM) variable on-time (VOT) buck converter providing an output of 1.8 V in the input range of 3-12 V to support applications with large wireless coupling. Conventionally, an additional large capacitor has been used as a bootstrap capacitor to drive the high-side switch of buck converters, which prevents minimisation. In this study, a standalone momentary power consumption level shifter is proposed to remove the additional bootstrap capacitor and increase the power conversion efficiency (PCE) in the buck converter. A Zener diode is utilised to reduce the power consumption of the level shifter. In addition, a dead-time-based off-time calibration circuit is proposed to further increase the PCE by reducing the low-side conduction loss. The proposed circuit is fabricated with a TSMC 0.18-μm BCD process, and the core circuit occupies an active area of 0.68 mm2 with two external components. It provides output currents in the range of 20 μA to 3 mA with a maximum switching frequency of 750 kHz. The maximum efficiency of the converter below 5 mW is 80.2%.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Analysis, design, and implementation of an improved gate driver for high
           switching frequency EV application
    • Authors: Pavan Singh Tomar;N Sandeep;Arun Kumar Verma;Manaswi Srivastava;
      Pages: 1797 - 1806
      Abstract: Electric vehicle (EV) battery chargers operate from moderate switching frequency (MSF) to high switching frequency (HSF) to achieve high power density. To operate the HSF power electronic devices, the selection of gate drivers and its associated components is crucial. Laboratory developed gate driver circuits (GDCs) often fail to drive these HSF devices adequately due to noise vulnerability, PWM duty loss and common-mode currents. Further, at MSF and HSF ranges, the gate-to-source terminals of the device are subjected to high voltages due to unwanted noise resulting in false turn-on of the switch leading to the converter failure. In this paper, firstly, an improved GDC and it's associated component selection criteria are proposed for HSF EV application. The proposed GDC is simple in structure with minor components; thus, it is cost-effective and highly reliable. Secondly, the proposed GDC is compared with the other commercially available competent GDCs. Power losses, cost and dynamic switching performance are the figures-of-merit for the quantitative assessment. From the comparison, it will be shown that the proposed GDC exhibits an overall superior performance among the popular GDCs. Finally, the distinctive features of the proposed GDC are experimentally validated for several test cases and the obtained results are presented.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Switched-capacitor multilevel inverter with self-voltage-balancing for
           high-frequency power distribution system
    • Authors: M. Jagabar Sathik;Kaustubh Bhatnagar;Yam P. Siwakoti;Hussain M. Bassi;Muhyaddin Rawa;N. Sandeep;Yongheng Yang;Frede Blaabjerg;
      Pages: 1807 - 1818
      Abstract: Switched capacitor multilevel inverter (SCMLI) with reduced components is attractive for higher number of voltage levels due to less implementation complexity and low cost. In this study, a new family of hybrid SCMLI for high frequency power distribution system is presented to eliminate the intermediate power conversion. Firstly, a five-level SCMLI employing a single voltage source is proposed, which is further extended to nine-level (9L) with its operation. Further extension/enhancement of the proposed 9L-SCMLI for generating a higher number of voltage levels with reduced number of components is achieved on the basis of structural modification. The mathematical analysis for determination of capacitance, power loss analysis and comparative analysis has been provided in detail. A comprehensive comparison with other similar topologies is also provided to highlight the merits of the proposed topology. Simulation and experimental results are discussed for various dynamic load conditions with different output frequencies to validate the suitability of the proposed SCMLI for various high-frequency AC applications, such as renewable energy systems, microgrids, electric vehicles and so on.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Analysis, design, and optimisation of an LCC/S compensated WPT system
           featured with wide operation range
    • Authors: Jiajin Qi;
      Pages: 1819 - 1827
      Abstract: Wireless power transfer (WPT) offers the advantages of convenience, safety, low-maintenance, high reliability, and strong adaptability to the environment. This study proposes a design method to help LCC/S compensation topology achieve zero voltage switching (ZVS), which helps improve the efficiency of the system. The optimisation design of the magnetic coupling structure is conducted first via the finite element simulation software, ANSYS Maxwell. Planar circular coil offers superior comprehensive performance over other structures and is thus utilised in this study, which theoretically analyses the primary characteristics of LCC/S (primary inductor-capacitor-capacitor, secondary series) compensation topology. The study makes an in-depth comparison of two methods for achieving ZVS, adjusting secondary series compensation capacitance, and making a primary T-type network asymmetric. The conclusions of the theoretical analysis indicate that making a primary T-type network asymmetric is the most suitable method for the proposed WPT system. A 400 W prototype was built, and it consistently achieved ZVS operation within the entire load range (5-50 Ω). The highest power transfer efficiency (PTE) achieved by the prototype was 92.9%, and the PTE was consistently above 88% within the entire power range (50-400 W).
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Offline method for experimental identification of load-dependent
           saturation of induction motor taking into account variation of inverse
           rotor time constant
    • Authors: Ondrej Lipcak;Jan Bauer;
      Pages: 1828 - 1836
      Abstract: Accurate knowledge of induction machine parameters has a direct impact on the overall performance of field-oriented control strategies. In the case of rotor flux oriented control, parameter mismatch causes a discrepancy in the estimated rotor flux position and amplitude. Magnetising inductance is one of the parameters whose detuning has a direct impact on the setpoints of the control loops and estimation of hardly or non-measurable quantities. Conventional iron saturation, which can be obtained by a standard no-load test, is not the only type of saturation occurring in the machine. Depending on the rotor design, the magnetising inductance and the rotor leakage inductance may also strongly saturate as a function of load and, thus, rotor current. Based on the authors' previous work, a new, improved experimental method for identifying the load-dependent saturation of induction motor, which takes into account variation of the inverse rotor time constant, is proposed. Experimental results conducted on 12 kW motor show improved static and dynamic behaviour of the drive compared to the constant parameter model.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Analysis and design of a high voltage-gain quasi-Z-source DC–DC
           converter
    • Authors: Farhad Abbasi Aghdam Meinagh;Jing Yuan;Yongheng Yang;
      Pages: 1837 - 1847
      Abstract: In this study, a modified DC-DC converter is proposed, which can achieve a high voltage-gain exploiting both quasi-Z-source and switched-capacitor networks. In addition to the high voltage-gain, the proposed converter has low voltage stresses on its elements. The steady-state analysis in both continuous and discontinuous conduction modes is given in this study. Moreover, the design of the passive elements, the calculation of the non-ideal voltage gain, and the power loss analysis are done. Then, an extended topology of the proposed converter is presented, which further enhances the voltage gain, while maintaining the voltage stresses of the components. A comprehensive comparison with the prior-art converters is performed to accentuate the advantages of the proposed converter. Finally, simulations and experimental tests are provided to substantiate the theoretical analysis.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Design and analysis of three-level hybrid boost converter based on T-type
           inverter for solar photovoltaic system
    • Authors: Norhassanah Osman;Mohamad Fathi Mohamad Elias;Nasrudin Abd. Rahim;
      Pages: 1848 - 1857
      Abstract: This paper presents the design and analysis of a three-level hybrid boost converter based on a single-phase three-level T-type inverter. The proposed converter can provide high energy conversion efficiency and high voltage gain capability with reduced component count. The pulse-width-modulation signals of the proposed converter are generated by comparing two duty cycles and two triangular carrier signals. The proposed converter consists of four power switches, four diodes, an inductor, and two capacitors. Detailed converter operations at each switching state with the corresponding voltage and current waveforms of each component are discussed. The functionality and performance of the proposed converter are verified through simulation and experimental results.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Implementation and analysis of ultracapacitor charger in hybrid
           energy-storage system for electric-vehicle applications
    • Authors: Kuo-Ching Tseng;Yu-Cheng Chang;Chun-An Cheng;
      Pages: 1858 - 1864
      Abstract: The light rail vehicles (commonly known as tramways or lightly laid railways) offer environmental advantages and have evoked an impressive attraction. The hybrid energy-storage systems efficiently supply energy for the light rail vehicles during the travel. This study implements and analyses an ultracapacitor charger in hybrid energy-storage system for electric-vehicle applications. Moreover, an ultracapacitor charger based on a full-bridge DC-DC converter that utilises a synchronous-rectification technique and high charging-current capability is presented. The proposed converter's current-doubler synchronous rectification reduces the secondary circulating current and recycles the energy of the leakage current to the power-source lead to further increase conversion efficiency. A prototype of this ultracapacitor charger, with an input voltage of 380 V and an output voltage of 14.6 V, has been implemented; the measured efficiency is 92.1% at a full load of 1 kW. In addition, the experimental results show the highest efficiency is 93.4% at an output power of 600 W. Furthermore, an ultracapacitor of 250 F is charged by the presented converter with a charging current of 65 A, and experimental waveforms illustrate that the charging time of the ultracapacitor voltage from 0 to 14.6 V is within 1 min.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • A new signal injection-based method for estimation of position in interior
           permanent magnet synchronous motors
    • Authors: Bowen Yi;Slobodan N. Vukosavić;Romeo Ortega;Aleksandar M. Stanković;Weidong Zhang;
      Pages: 1865 - 1874
      Abstract: Several heuristic procedures to estimate the rotor position of interior permanent magnet synchronous motors (IPMSM) via signal injection have been reported in the application literature, and are widely used in practice. These methods, based on the use of linear time-invariant (LTI) high-pass/low-pass filtering, are instrumental for the development of sensorless controllers. To the best of authors' knowledge, no theoretical analysis of these methods has been carried out. The objectives of this note are (i) to invoke some recent work on the application of averaging techniques for injection-based observer design to develop a theoretical framework to analyse the LTI filtering used in sensorless methods and (ii) to propose a new method that on the one hand ensures improved accuracy and on the other hand can be related to the current filtering technique. An additional advantage of the new method is that it relies on the use of linear operators, implementable with simple computations. The effectiveness of the proposed scheme is assessed by experiments on an IPMSM platform driven by a 521 V DC bus with a 5-kHz pulse-width modulation.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Sensorless flux adaption DTFC of an IPMSM based on an active flux-based
           MTPA and an adaptive second-order sliding mode observer
    • Authors: Junlei Chen;Xiang Wu;Shuo Chen;Guojun Tan;
      Pages: 1875 - 1884
      Abstract: This study proposes a sensorless flux adaption direct torque and flux control (DTFC) for an interior permanent magnet synchronous motor (IPMSM), in which an maximum torque per ampere (MTPA) based on active flux and an adaptive second-order sliding mode observer (SOSMO) are adopted. Flux adaption DTFC is proposed based on the existing active flux concept. Thus, the stator current amplitude can be minimised in both steady state and transient state. Furthermore, to realise the sensorless control of the IPMSM, an adaptive SOSMO is proposed. Compared with constant gains SOSMO, the gains of the adaptive SOSMO can be adjusted adaptively with the motor speed changing. Then, the precision of position estimation is enhanced effectively in a wide speed range. Numerical simulations and experiments with a 60 kW IPMSM are implemented. In addition, the results validate the capability of the proposed sensorless flux adaption DTFC scheme.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Direct torque controlled induction motor drive using modified five-level
           torque controller for reduction in torque ripple
    • Authors: Murli Manohar;Sukanta Das;
      Pages: 1885 - 1892
      Abstract: The work presents a modified switching strategy in a five-level torque controller while implementing a direct torque control scheme for the induction motor (IM) drive. Apart from the presence of conventional full-voltage vectors, the inclusion of intermediate- and zero-voltage vectors brings in the modification above in a five-level torque controller. Moreover, the estimation of flux in the scheme is done by machine current model. These adjustments result in the reduction in the torque and speed ripples; and improve the flux regulation in the low-speed region, thereby obtaining superior low-speed performance. The performance of the proposed scheme is exhaustively tested in MATLAB/Simulink and further by hardware experimentation with a laboratory-type setup of 2.2 kW, two-level voltage source inverter fed IM drive.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Synchronous reference frame single-phase phase-locked loop (PLL) algorithm
           based on half-cycle DFT
    • Authors: Tao Xia;Xu Zhang;Guojun Tan;Yezhao Liu;
      Pages: 1893 - 1900
      Abstract: In single-phase power and energy applications, sliding discrete Fourier transform (SDFT) filter based quadrature signal generation is a well-known tool for designing advanced phase-locked loops (PLLs), particularly for applications where high disturbance rejection ability is demanded. The SDFT-based PLL, nevertheless, has a limited ability in achieving fast response (a response time more than one cycle of the nominal frequency). To deal with this problem, a synchronous reference frame PLL based on half-cycle DFT (HCDFT) is proposed, enabling a fast and accurate synchronisation even in distorted grid. In this study, the fundamental voltage of the PLL input signal is obtained by a HCDFT filter. Then, phase, frequency and amplitude can be detected by the improved synchronous reference frame phase-locked loop (SRF-PLL). Besides, in order to solve the phase error when the frequency changes, a phase compensator is used. The HCDFT-based SRF-PLL method proposed in this study is compared, through experimental results, with a number of conventional methods, showing that the phase can be estimated under grid voltage disturbances accurately and quickly, which verifies the effectiveness and superiority of the proposed algorithm.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Family of single-phase isolated high-frequency transformer integrated
           improved magnetically coupled Z-source ac–ac converters
    • Authors: Hafiz Furqan Ahmed;Mohamed Shawky El Moursi;Tooba Irshad;Ehab El-Saadany;Khalifa Al Hosani;
      Pages: 1901 - 1910
      Abstract: This study proposes single-phase improved coupled-inductor (CL) Z-source (ZS) ac-ac converters with integrated high-frequency transformer (HFT) isolation. They can provide wide range of buck-boost voltage with same/reversed phase angle, similar to the existing ZS ac-ac converters. Meanwhile, integrating a HFT with CL in proposed converters benefit in two-fold: (i) the CL enhances the voltage gain, which in turn reduces the voltage stresses/ratings of active switches. Moreover, the turns ratio of CL add another degree of freedom to gain adjustment beside the duty ratio; (ii) the HFT (20 kHz) is integrated with CL by adding only one winding to the same magnetic core, which provides electrical isolation for applications such as dynamic voltage restore, saving extra bulky line frequency (60 Hz) transformer. In addition, the proposed converters provide both continuous input/output currents. The commutation strategy is also implemented to eliminate the switch voltage spikes. A proposed HFT isolated improved three-winding Δ-CL ZS (Δ-ZS) ac-ac converter is introduced at first, and its operation, circuit analysis and component design/selection are discussed in detail along with comparisons with counterpart converters. Various different CL structures based proposed HFT isolated ZS ac-ac converters are presented afterwards. Experimental results on 200 W prototype converter are provided finally to verify their merits.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Analysis and compensation of the rotor position offset error and time
           delay in field-oriented-controlled PMSM drives
    • Authors: Chuanqiang Lian;Fei Xiao;Jilong Liu;Shan Gao;
      Pages: 1911 - 1918
      Abstract: In high-performance field-oriented control of permanent magnet synchronous machines (PMSMs), an accurate rotor position is indispensable for the key roles in coordinate transformations. However, due to the rotor position offset error and the time delay in digital control systems, it is still challenging to obtain exact rotor position information. In this study, the influence of rotor position error on the control performance of a PMSM drive system is analysed first. Then, two novel compensation technologies, $i_d$id regulation and $i_q = 0$iq=0 methods, are proposed to accurately compensate for the rotor position for both current and voltage coordinate transformations. The advantage of the proposed scheme is that even without any prior knowledge of the system delay, the rotor position offset and compensation time coefficients can also be precisely calculated. Parameter sensitivity analysis is carried out, and compensation criteria are also provided to improve the compensation accuracy. Experimental results on a 300 kW PMSM drive system demonstrate that compared to the results achieved with conventional methods, the compensation accuracies of the phase angles used for the current and voltage coordinate transformations are increased by $6^circ $6° and $3.1^circ $3.1° at 5000 r/min, respectively. Consequently, the control performance and stability margin of the system are efficiently improved.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
  • Seven-level boosting active neutral point clamped inverter using
           cross-connected switched capacitor cells
    • Authors: M. Jagabar Sathik;N. Sandeep;Dhafer Almakhles;Kaustubh Bhatnagar;Yongheng Yang;Frede Blaabjerg;
      Pages: 1919 - 1924
      Abstract: In this study, an active neutral point clamped-type boosting switched-capacitor multilevel inverter (SCMLI) with self-voltage balancing capability is proposed. In the proposed topology, a novel switched capacitor cell is used, which has eight switches and two diodes. The presented topology has reduced power component count with self-boosting and balancing abilities. The distinctive features of the proposed topology are highlighted and benchmarked against other recent 7L-SCMLI topologies. To validate the feasibility of the proposed topology, experimental tests are performed on a 1 kW prototype hardware setup.
      PubDate: 7 24 2020
      Issue No: Vol. 13, No. 9 (2020)
       
 
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