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Research on Iron Loss of Switched Reluctance Starter/Generator for Energy Storage

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Protection and Control of Modern Power Systems 2024年第4期9卷 147-159页

作者： Hao Chen Xing Wang Yongqiang Liu Vuong Dang Quoc Wenju Yan Muhammad Saqib Antonino Musolino Guanjun Wang Yong Qi Ali Asghar Memon Alexandros G.Paspatis the Shenzhen Research Institute China University of Mining and TechnologyShenzhen 515100China the School of Electrical engineering China University of Mining and TechnologyXuzhou 221116China Xinjiang Institute of engineering Urumqi 830000China the International Joint Research Center of Central and Eastern European Countries on New Energy EV Technology and Equipment Xuzhou 221008China the International Cooperation Joint Laboratory of New Energy Power Generation and EVs of Jiangsu Province Colleges and Universities Xuzhou 221008China the Xuzhou Key Laboratory of New Energy EV Technology and Equipment Xuzhou 221008China the the School of Electrical engineering China University of Mining and Tech-nologyXuzhou 221116China the Laboratory of High Performance Electric Machines(HiPems) Hanoi VN 10000Viet Nam the University of engineering and Technology Lahore 54890Pakistan the department of Energy Pisa Uni-versity of PisaPisa IT 56126Italy the Wuxi Inspection and Testing Certification Research Institute Wuxi 214000China the Nanjing University of Science&Tech-nology Nanjing 210094China the Mehran University of engi-neering&Technology Jamshoro PK 76062Sindh the National Technical University of Athens Zografou GR 15780Attica

In order to better realize the energy recovery and storage of hybrid EVs(HEVs),a switched reluctance starter/generator(SRS/G)with both starting and power generation functions is investigated in this ***,the iron loss of SRS/G is mainly studied to reduce the motor loss and improve the power generation ***,the energy storage of hybrid EVs can be effectively ***,a magnetic flux density(MFD)waveforms solution method is proposed to solve the difficulty in calculating the iron loss of the SRS/*** with the commonly used finite element method,the proposed solution method has the advantages of simple,fast and small computational ***,considering the different operating conditions of SRS/G,the iron loss models for both the time-domain and frequency-domain are *** addition,the calculation formula of the variable coefficient Bertotti three-term loss separation is *** the hysteresis loss coefficient,the Steinmetz coefficient and the stray loss coefficient are respectively fitted by the Fourier fitting *** method is also applied to solve the iron loss of SRS/***,through an experimental verification,it is indicated that the development of proposed method has high accuracy.

关键词： Switched reluctance starter/generator energy storage iron loss finite element method magnetic flux density(MFD)

Safety and in Vivo Anti-Inflammatory Activity of Ethanolic Extract of Ficus umbellata (Vahl.) Leaves

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Journal of Biosciences and Medicines 2024年第3期12卷 94-112页

作者： Atchadé Pascal Tchogou Steven Amour Pyus Tanguy Vignon Chokki Gbèssohèlè Justin Behanzin Tétédé Rodrigue Christian Konfo Perside Savoeda Félicienne Agbogba Léocardie Akpoli Lamine Baba-Moussa Maximin Senou Alphonse Sezan Experimental and Clinical Biology Unit (UBEC) Biotechnology Research Laboratory Medical and Pharmaceutical (LaRBiMeP) Na-tional School of Biosciences and Biotechnology of Dassa-Zoumé (ENSBBA) National University of Science Technology and Engi-neering of Abomey (UNSTIM) Dassa-Zoumé Benin Laboratory of Pharmacology and Improved Traditional Medicines (LPMTA) Faculty of Science and Technology (FAST) University of Abomey-Calavi (UAC) Abomey-Calavi Benin National University of Agriculture (UNA) Schools of Science and Techniques for Preservation and Processing of Agricultural Prod-ucts (ESTCTPA) Sakété Benin Laboratory of Biology and Molecular Typing in Microbiology Department of Biochemistry and Cell Biology Faculty of Science and Technology University of Abomey-Calavi Cotonou Benin

Toxicity is the totality of adverse effects, which can be functional and morphological lesions in a living organism, caused by a substance introduced in relatively high single doses or in small, repeated doses. The aim of this study was to assess the OECD-recommended acute oral toxicity and anti-inflammatory activity of ethanolic extract of Ficus umbellata leaves. Animals were given a single oral dose of 1000, 3000 and 5000 mg/Kg body weight (BW) of the extract. For the anti-inflammatory activity test, rats were given the ethanolic extract of F. umbellata leaves at doses of 100, 300 and 500 mg/Kg or aspirin® at a concentration of 100 mg/Kg PC orally, one hour before injection of 0.05 ml of 1% formalin under the plantar fascia of the rat’s right hind paw. Paw volume measurements were taken one, two and three hours after formalin injection, using an electronic caliper. After 14 days of observation, no deaths were observed in treated rats. The LD50 of ethanolic extract of Ficus umbellata leaf powder is greater than 5000 mg/Kg body weight. This extract has no significant effects on hematological parameters and on the main markers of nephrotoxicity and hepatotoxicity for a single dose of less than 5000 mg/Kg PC. It reduces formalin-induced edema. Evaluation of the percentage inhibition showed that the extract had greater anti-inflammatory activity at 3 hours after the start of the experiment. However, better inhibition of inflammatory oedema of the paw of rats treated with 500 mg/Kg was observed at 5 hours after the start of the experiment, with a percentage inhibition of 69.23 ± 1.02, compared with the reference group treated with aspirin® 100 mg/Kg, which showed an inhibition of 63.50 ± 0.98. These results show that F. umbellata leaves possess anti-inflammatory activity, which would justify their use in traditional African medicine to prevent or treat inflammation.

关键词： Ficus umbellata Toxicity Anti-Inflammatory Edema Inflammation

Study on cogging force of permanent magnet linear synchronous motor

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Journal of Coal Science & engineering(China) 2005年第1期11卷 89-92页

作者：上官璇峰袁世鹰励庆孚 School of Electrical engineering Xi'an Jiaotong University department of Electrical engi-neering Henan Polytechnic University Jiaozuo 454000 China department of Electrical engi-neering Henan Polytechnic University

Presented the methods to obtain the cogging force of permanent magnet linear synchronous motors(PMLSMs), analyzed the characteristics of the cogging force, and provided a basis for reducing the effect of the cogging force. 2-dimensional finite element method(2D FEM) was used to solve the whole motor when its mover was at dif- ferent position, so that the relation was derived between the cogging force and the mover position. The analysis results show that the cogging force between the two ends of the primary iron-core and the secondary permanent magnets (PMs) is sinusoidal function of the mover position under certain conditions only. Two proposed methods, namely direct and indirect methods, are applied to calculate the cogging force between the primary iron-core teeth and the secondary PMs. The agreement of the two methods is validated.

关键词：开坯压力有限元分析 PMLSMs 数学模型同步电动机

Synthesis and crystal structure of（C5Me4SiMe3）[（^iPrN）2CCH2SiMe3]2Y

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Journal of Rare Earths 2009年第1期27卷 18-21页

作者：陈珏王秀莲罗云杰姚英明 Organometallic Chemistry Laboratory Ningbo Institute of TechnologyZhejiang University department of Chemistry and Chemical engi-neering Suzhou University

Reaction of（C5Me4SiMe3）Y（CH2SiMe）2（THF） with two equivalents of iPrN=C=NiPr in hexane at room temperature afforded a mixed-ligand yttrium complex（C5Me4SiMe3）（iPrN）2CCH2SiMe32Y.X-ray diffraction revealed that the center metal was nine-coordinated by one cyclopentadienyl ring and two amidinate ligands, and adopted a four-legged piano stool geometry.

关键词： organo yttrium complex insertion reaction crystal structure rare earths

Fractional Modeling and Analysis of Coupled MR Damping System

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IEEE/CAA Journal of Automatica Sinica 2016年第3期3卷 288-294页

作者： Bingsan Chen Chunyu Li Benjamin Wilson Yijian Huang School of mechanical and Automotive engi-neering Fujian University of Technology department of Chemical and Biological engineering University of Wisconsin School of mechanical and Automotive engineering Fujian University of Technology

The coupled magnetorheological(MR) damping system addressed in this paper contains rubber spring and magnetorheological damper. The device inherits the damping merits of both the rubber spring and the magnetorheological *** a fractional-order constitutive equation is introduced to study the viscoelasticity of the combined damper. An introduction to the definitions of fractional calculus, and the transfer function representation of a fractional-order system are given. The fractional-order system model of a magnetorheological vibration platform is set up using fractional calculus, and the function of displacement is presented. It is indicated that the fractional-order constitutive equation and the transfer function are feasible and effective means for investigating of magnetorheological vibration device.

关键词： Fractional calculus magnetorheological(MR)fluid fractional-order constitutive equation fractional-order sys-tem system modeling

Ce_(1–x)La_xO_y solid solution prepared from mixed rare earth chloride for soot oxidation

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Journal of Rare Earths 2016年第6期34卷 590-596页

作者：韩雪王亚飞郝红蕊郭荣贵胡运生蒋文全 Institute of Rare Earth Metallurgical Materials General Research Institute for Nonferrous MetalsBeijing 100088China School of mechanical engi-neering Beijing Institute of Petrochemical TechnologyBeijing 102617China

Ce_（1–x）La_xO_y solid solution was simply prepared using mixed rare earth chloride（RECl_3·x H_2O, RE=Ce, La99%, containing unseparated Ce and La from rare earth metallurgical industry） as precursor by ultrasonic-assisted co-precipitation method with different ultrasonic frequencies（CLf, f=200, 400, 600, 800, 1000 Hz）. A compared Ce_（1–x）La_xO_y solid solution（CL＊） was also prepared by the same mothod with 10% less precipitant. X-ray diffraction results confirmed the formation of Ce1–xLaxOy solid solution, and the crystal structures of these catalysts were not very sensitive to ultrasonic frequency and precipitant amount. However, both of the factors had obvious effect on morphology and surface area of CL, and precipitant amount seem to play a more crucial role than ultrasonic frequency for Ce_（1–x）La_xO_y solid solution preparation. When soot and catalyst were tight contacted, the peak temperature（Tpeak） of soot oxidation and oxygen reducing temperature for CLf catalysts decreased linearly with increasing surface area. Under loose contact condition, the Tpeak had obvious negative correlation with H_2 consumption. It was inferred that good reducibility of the Ce_（1–x）La_xO_y solid solution favored the soot oxidation reaction. The Ce_（1–x）La_xO_y solid solution prepared from unseparated rare earth chloride showed a good soot oxidaiton activity. Controlling the preparation conditions to prepare a CL catalyst would high surface area will enhance its reducibility and activity.

关键词： Ce_(1–x)La_xO_y solid solution soot oxidation mixed rare earth chloride ultrasonic-assisted method co-precipitation

Investigation on Effects of Vertical Degree of Freedom on Gap Resonance Between Two Side-by-Side Boxes Under Wave Actions

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China Ocean engineering 2022年第3期36卷 403-412页

作者： HE Zhi-wei GAO Jun-liang SHI Hua-bin ZANG Jun CHEN Hong-zhou LIU Qian School of Naval Architecture and Ocean engineering Jiangsu University of Science and TechnologyZhenjiang 212100China State Key Laboratory of Internet of Things for Smart City and department of Civil and Environmental engineering University of MacaoMacao 999078China Centre for Infrastructure Geotechnical and Water Engineering(IGWE)Department of Architecture and Civil Engi-neeringUniversity of BathBA27AYUK School of Civil engineering and Architecture Northeast Electric Power UniversityJilin 132012China

The possible wave resonance in the narrow gap formed by the parallel arrangement of ships will lead to the sharp increase of wave loads and the rapid growth of motion *** fluid resonance inside a narrow gap between two side-by-side boxes is investigated numerically based on an open-source CFD package,*** upstream box remains fixed,while the downstream box is allowed to heave freely under wave *** work aims to examine the influence of the motion of the downstream box on the fluid resonant behaviors inside the *** hydrodynamic behaviors considered include the wave height inside the gap,the heave displacement,and the reflection,transmission,and energy loss *** et al.(2021)reported the influence of the motion of the upstream box on gap resonant *** comparative study,some results of Gao et al.(2021)are also presented in this *** is found that the heave motion of any box in the two-box system leads to a smaller resonant wave height amplification and a larger fluid resonance *** frequency at which the maximum heave displacement of the downstream box occurs is less than the fluid resonant *** heave motion of any box in the two-box system results in a larger reflection coefficient and a smaller energy loss coefficient.

关键词： gap resonance wave height amplification heave motion OpenFOAM

Steam reforming of ethanol over Ni/Ce_(0.7)Pr_(0.3)O_2 catalyst

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Journal of Rare Earths 2012年第7期30卷 670-675页

作者：王红张丽娟袁木朝子徐婷玉刘源 School of Chemical engineering Inner Mongolia University of Technology Tianjin Key Laboratory of Applied Catalysis Science and engi-neering Department of Catalysis Science and TechnologySchool of Chemical EngineeringTianjin University

NiO/Ce0.7Pr0.3O2 catalysts were prepared by co-precipitation method and used for steam reforming of ethanol to produce hydrogen. The influence of nickel content and the doping of Pr on the catalytic performance were investigated. The catalysts were characterized by using temperature programmed reduction （TPR）, X-ray diffraction （XRD） and thermal analysis techniques. 15 wt.%NiO/Ce0.7Pr0.3O2 catalyst was highly active and selective for steam reforming of ethanol to produce hydrogen. With the doping of Pr, the anti-carbon deposition property of the catalyst and the anti-sintering stability of metal nickel were effectively improved. The improvement of the anti-carbon deposition is attributed to generation of oxygen vacancies resulted from the Pr doping; while the improvement of anti sintering is ascribed to the intensified interaction between the nickel species and the support which is owing to the Pr-doping resulted incorporation of some nickel ions into ceria lattice.

关键词： cerium praseodymium ethanol steam reforming nickel doping rare earths

Multi-objective optimization of combustion, performance and emission parameters in a jatropha biodiesel engine using non-dominated sorting genetic algorithm-II

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Frontiers of mechanical engineering 2014年第1期9卷 81-94页

作者： Sunil Dhingra Gian Bhushan Kashyap Kumar Dubey department of mechanical engineering University Institute of Engi-neering and Technology Kurukshetra University Kttnakshetra department of mechanical engineering National Institute of Technolo-gy Kurukshetra department of Biotechnology University Institute of Engineering andTechnology Maharshi Dayanand University Rohtak

The present work studies and identifies the different variables that affect the output parameters involved in a single cylinder direct injection compression ignition （CI） engine using jatropha biodiesel. Response surface methodology based on Central composite design （CCD） is used to design the experiments. Mathematical models are developed for combustion parameters （Brake specific fuel consumption （BSFC） and peak cylinder pressure （Pmax））, performance parameter brake thermal efficiency （BTE） and emission parameters （CO, NOx, unburnt HC and smoke） using regression techniques. These regression equations are further utilized for simultaneous optimization of combustion （BSFC, Pmax）, performance （BTE） and emission （CO, NOx, HC, smoke） parameters. As the objective is to maximize BTE and minimize BSFC, Pmax, CO, NOx, HC, smoke, a multi- objective optimization problem is formulated. Non- dominated sorting genetic algorithm-II is used in predict- ing the Pareto optimal sets of solution. Experiments are performed at suitable optimal solutions for predicting the combustion, performance and emission parameters to check the adequacy of the proposed model. The Pareto optimal sets of solution can be used as guidelines for the end users to select optimal combination of engine outputand emission parameters depending upon their own requirements.

关键词： jatropha biodiesel fuel properties responsesurface methodology multi-objective optimization non-dominated sorting genetic algorithm-II