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A large-current, highly integrated switched-capacitor divider with a dual-branch interleaved topology Research Articles

Sheng LIU, Menglian ZHAO, Zhao YANG, Haonan WU, Xiaobo WU,liusheng_0827@zju.edu.cn,zhaoml@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 2,   Pages 317-327 doi: 10.1631/FITEE.2000404

Abstract: Because it is magnet-free and can achieve a high integration level, the switched-capacitor (SC) converterThis paper proposes a dual-branch SC voltage divider and presents its (IC) implementation.The designed SC converter is capable of driving large current load, thus widening the use of SC convertersThis SC converter has a constant conversion ratio of 1/2 and its dual-branch interleaved operation ensuresDue to the self-powered structure, the flying capacitor itself is also a bootstrap capacitor for gate

Keywords： Switched-capacitor converter     Dual branch     Integrated circuit     Bootstrap gate driver    

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A novel PV sub-module-level power-balancing topology for maximum power point tracking under partial shading and mismatch conditions Article

Mustafa GOKDAG,Mehmet AKBABA

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 12,   Pages 1388-1396 doi: 10.1631/FITEE.1500322

Abstract: The proposed topology benefits from the switched-capacitor (SC) converter concept and is an applica-tionin the number of power electronics components is realized by the fact that two sub-modules share one SC

Keywords： maximum power point tracking (MPPT)     Differential power processing (DPP)     Distributed power converters     Switched-capacitor(SC) converters    

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Digital switched hydraulics

Min PAN, Andrew PLUMMER

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 225-231 doi: 10.1007/s11465-018-0509-7

Abstract:

This paper reviews recent developments in digital switched hydraulics particularly the switched inertance

Keywords： digital hydraulics     switched inertance hydraulic systems     energy efficiency     high-speed switching valve    

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Electromagnetic modeling and control of switched reluctance motor using finite elements

Ali ARIF,Abderrazak GUETTAF,Ahmed Chaouki MEGHERBI,Said BENRAMACHE,Fateh BENC HABANE

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 355-363 doi: 10.1007/s11708-014-0319-5

Abstract: This paper considered the implementation of a current control method for switched reluctance motors (

Keywords： switched reluctance motor (SRM)     hysteresis     control     finite element analysis    

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NiCo2O4@quinone-rich N–C core–shell nanowires as composite electrode for electric double layer capacitor

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 373-386 doi: 10.1007/s11705-022-2223-6

Abstract: O4 nanowires, and the obtained composite was used as electrode for electric double layer capacitorThe assembled symmetric electric double layer capacitor achieved a high energy density of 6.55 mW∙h∙cmThe assembled symmetric capacitor exhibited a capacitance retention of 88.96% after 10000 charge/discharge

Keywords： NiCo2O4 nanowires     core−shell structure     quinone-rich     electric double layer capacitor    

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Performance prediction of switched reluctance generator with time average and small signal models

Jyoti KOUJALAGI, B. UMAMAHESWARI, R. ARUMUGAM

Frontiers in Energy 2013, Volume 7, Issue 1,   Pages 56-68 doi: 10.1007/s11708-012-0216-8

Abstract: This paper presents the complete mathematical model and predicts the performance of switched reluctanceThe simulation is performed to choose the control parameters and study the performance of switched reluctance

Keywords： generator     reluctance     switching model     small signal model     time average model    

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Differential coupling contributes to synchronization via a capacitor connection between chaotic circuits Regular Papers

Yu-meng XU, Zhao YAO, Aatef HOBINY, Jun MA

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4,   Pages 571-583 doi: 10.1631/FITEE.1800499

Abstract: In this paper, capacitor coupling is applied between two Pikovsk-Rabinovich (PR) circuits, and electricFurthermore, by applying appropriate intensity for the coupling capacitor, synchronization is also reachedand the energy flow across the coupling capacitor is helpful in regulating the dynamical behaviors ofThe capacitor coupling can avoid energy consumption for the case with resistor coupling, and it can also

Keywords： Synchronization     Voltage coupling     Chaotic circuit     Capacitor coupling    

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Comparison of optimal capacitor placement methods in radial distribution system with load growth and

Veera Venkata Satya Naryana MURTY, Ashwani KUMAR

Frontiers in Energy 2013, Volume 7, Issue 2,   Pages 197-213 doi: 10.1007/s11708-013-0249-7

Abstract: radial distribution system (RDS) based on the real and reactive combined loss sensitivity index, as capacitor

Keywords： load growth     load models     reactive power compensation     radial distribution system     power loss index (PLI)     power loss sensitivity (PLS)     index vector (IV)    

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Robust switched fractional controller for performance improvement of single phase active power filter

H. AFGHOUL,F. KRIM,D. CHIKOUCHE,A. BEDDAR

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 203-212 doi: 10.1007/s11708-015-0381-7

Abstract: The proposed switched fractional controller (SFC) consists of a conventional PI controller, a fractional

Keywords： conventional PI controller     fractional calculus (FC)     total harmonic distortion (THD)     Oustaloup continuous approximation (OCA)     single phase active power filter (SPAPF)    

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Ergodic secrecy capacity ofMRC/SC in single-inputmultiple-output wiretap systems with imperfect channel Article

Hui ZHAO, You-yu TAN, Gao-feng PAN, Yun-fei CHEN

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 4,   Pages 578-590 doi: 10.1631/FITEE.1500430

Abstract: paper investigates the secrecy performance of maximal ratio combining (MRC) and selection combining (SC, a source transmits confidential messages to the destination equipped with antennas using the MRC/SCAn eavesdropper equipped with antennas also adopts the MRC/SC scheme to promote successful eavesdroppingexpressions for the ergodic secrecy capacity (ESC) in two cases: (1) MRC with weighting errors, and (2) SC

Keywords： ESC)     Maximal ratio combining (MRC)     Weighting errors     Physical layer security     Selection combining (SC    

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The Development of World Tantalum Powder Technology

He Jilin

Strategic Study of CAE 2001, Volume 3, Issue 12,   Pages 85-89

Abstract:

This article introduces the technology development of capacitor grade tantalum powders including highimpurity content and improve the physical properties of tantalum powder so as to meet the requirement of capacitor

Keywords： tantalum powder     tantalum capacitor     specific capacitance     sodium reduction of potassium fluotantalate    

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Expulsive force in the development of CO

Haizhu WANG,Gensheng LI,Zhonghou SHEN,Zhenguo HE,Qingling LIU,Bin ZHU,Youwen WANG,Meng WANG

Frontiers in Energy 2019, Volume 13, Issue 1,   Pages 1-8 doi: 10.1007/s11708-017-0458-6

Abstract: Supercritical CO (SC-CO ) has prominent advantages in well drilling, fracturing, displacement, storageIn this paper, based on physicochemical properties of SC-CO fluid, a detailed analysis of technicaladvantages of SC-CO applied in oil and gas development is illustrated.Furthermore, the implementation processes of SC-CO are also proposed.

Keywords： CO2 sequestration     SC-CO2 jet     well drilling     fracturing     oil and gas    

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Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

Frontiers in Energy 2021, Volume 15, Issue 2,   Pages 431-448 doi: 10.1007/s11708-021-0726-3

Abstract: ignition behavior and to reduce the high NO emissions of blended pulverized fuels (PF) of semicoke (SCregulating the nozzle / conditions sharply reduces NO emissions and improves the combustion efficiency of SC

Keywords： rectangular jet burner     nozzle height to width ratio     ignition characteristics     pyrolyzed semicoke (SC)    

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Effect of oil shale semi-coke on deposit mineralogy and morphology in the flue path of a CFB burning Zhundong lignite

Zhuo LIU, Jianbo LI, Mingming ZHU, Xiaofeng LU, Zhezi ZHANG, Dongke ZHANG

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 26-37 doi: 10.1007/s11708-020-0668-1

Abstract: The effect of oil shale semi-coke (SC) on the mineralogy and morphology of the ash deposited on probescirculating fluidized bed (CFB) which burns Zhundong lignite (ZD) was investigated. 10 wt% or 20 wt% SCAs SC was added, the agglomerates in both P W and P L decreased.Moreover, Na in the deposits decreased from 32 mg/g to less than 15 mg/g as SC presented.The addition of SC would therefore help alleviate the propensity of ash deposition in the flue path in

Keywords： ash deposition     circulating fluidized bed (CFB)     mineral transformation     oil shale semi-coke (SC)     Zhundong    

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A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth metals activation

Xiling Li, Tianwei Hao, Yuxin Tang, Guanghao Chen

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1295-0

Abstract: Abstract • Capacitive biochar was produced from sewage sludge. • Seawater was proved to be an alternative activation agent. • Minerals vaporization increased the surface area of biochar. • Molten salts acted as natural templates for the development of porous structure. Sewage sludge is a potential precursor for biochar production, but its effective utilization involves costly activation steps. To modify biochar properties while ensuring cost-effectiveness, we examined the feasibility of using seawater as an agent to activate biochar produced from sewage sludge. In our proof-of-concept study, seawater was proven to be an effective activation agent for biochar production, achieving a surface area of 480.3 m2/g with hierarchical porosity distribution. Benefited from our design, the catalytic effect of seawater increased not only the surface area but also the graphitization degree of biochar when comparing the pyrolysis of sewage sludge without seawater. This leads to seawater activated biochar electrodes with lower resistance, higher capacitance of 113.9 F/g comparing with control groups without seawater. Leveraging the global increase in the salinity of groundwater, especially in coastal areas, these findings provide an opportunity for recovering a valuable carbon resource from sludge.

Keywords： Sewage sludge     Biochar     Seawater     Recourse recovery     Capacitor    

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Title Author Date Type Operation

A large-current, highly integrated switched-capacitor divider with a dual-branch interleaved topology

Sheng LIU, Menglian ZHAO, Zhao YANG, Haonan WU, Xiaobo WU,liusheng_0827@zju.edu.cn,zhaoml@zju.edu.cn

Journal Article

A novel PV sub-module-level power-balancing topology for maximum power point tracking under partial shading and mismatch conditions

Mustafa GOKDAG,Mehmet AKBABA

Journal Article

Digital switched hydraulics

Min PAN, Andrew PLUMMER

Journal Article

Electromagnetic modeling and control of switched reluctance motor using finite elements

Ali ARIF,Abderrazak GUETTAF,Ahmed Chaouki MEGHERBI,Said BENRAMACHE,Fateh BENC HABANE

Journal Article

NiCo2O4@quinone-rich N–C core–shell nanowires as composite electrode for electric double layer capacitor

Journal Article

Performance prediction of switched reluctance generator with time average and small signal models

Jyoti KOUJALAGI, B. UMAMAHESWARI, R. ARUMUGAM

Journal Article

Differential coupling contributes to synchronization via a capacitor connection between chaotic circuits

Yu-meng XU, Zhao YAO, Aatef HOBINY, Jun MA

Journal Article

Comparison of optimal capacitor placement methods in radial distribution system with load growth and

Veera Venkata Satya Naryana MURTY, Ashwani KUMAR

Journal Article

Robust switched fractional controller for performance improvement of single phase active power filter

H. AFGHOUL,F. KRIM,D. CHIKOUCHE,A. BEDDAR

Journal Article

Ergodic secrecy capacity ofMRC/SC in single-inputmultiple-output wiretap systems with imperfect channel

Hui ZHAO, You-yu TAN, Gao-feng PAN, Yun-fei CHEN

Journal Article

The Development of World Tantalum Powder Technology

He Jilin

Journal Article

Expulsive force in the development of CO

Haizhu WANG,Gensheng LI,Zhonghou SHEN,Zhenguo HE,Qingling LIU,Bin ZHU,Youwen WANG,Meng WANG

Journal Article

Influence of nozzle height to width ratio on ignition and NO

Liutao SUN, Yonghong YAN, Rui SUN, Zhengkang PENG, Chunli XING, Jiangquan WU

Journal Article

Effect of oil shale semi-coke on deposit mineralogy and morphology in the flue path of a CFB burning Zhundong lignite

Zhuo LIU, Jianbo LI, Mingming ZHU, Xiaofeng LU, Zhezi ZHANG, Dongke ZHANG

Journal Article

A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth metals activation

Xiling Li, Tianwei Hao, Yuxin Tang, Guanghao Chen

Journal Article