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| 1 | Driving and Braking Control of PM Synchronous Motor Based on Low-resolution Hall Sensor for Battery Electric Vehicle显示文摘Resolvers are normally employed for rotor positioning in motors for electric vehicles,but resolvers are expensive and vulnerable to vibrations.Hall sensors have the advantages of low cost and high reliability,but the positioning accuracy is low.Motors with Hall sensors are typically controlled by six-step commutation algorithm,which brings high torque ripple.This paper studies the high-performance driving and braking control of the in-wheel permanent magnetic synchronous motor(PMSM) based on low-resolution Hall sensors.Field oriented control(FOC) based on Hall-effect sensors is developed to reduce the torque ripple.The positioning accuracy of the Hall sensors is improved by interpolation between two consecutive Hall signals using the estimated motor speed.The position error from the misalignment of the Hall sensors is compensated by the precise calibration of Hall transition timing.The braking control algorithms based on six-step commutation and FOC are studied.Two variants of the six-step commutation braking control,namely,half-bridge commutation and full-bridge commutation,are discussed and compared,which shows that the full-bridge commutation could better explore the potential of the back electro-motive forces(EMF),thus can deliver higher efficiency and smaller current ripple.The FOC braking is analyzed with the phasor diagrams.At a given motor speed,the motor turns from the regenerative braking mode into the plug braking mode if the braking torque exceeds a certain limit,which is proportional to the motor speed.Tests in the dynamometer show that a smooth control could be realized by FOC driving control and the highest efficiency and the smallest current ripple could be achieved by FOC braking control,compared to six-step commutation braking control.Therefore,FOC braking is selected as the braking control algorithm for electric vehicles.The proposed research ensures a good motor control performance while maintaining low cost and high reliability. | GU Jing OUYANG Minggao LI Jianqiu LU Dongbin FANG Chuan MA Yan | 2013 | Chinese Journal of Mechanical Engineering2013，26，1： | 14 |
| 2 | Bank Size and Small- and Medium-sized Enterprise (SME) Lending: Evidence from China显示文摘 | Yan Shen Minggao Shen | 2009 | World Development2009，，4： | 2 |
| 3 | OXIDATION RESISTANCE AND MECHANICAL PROPERTIES OF Ti_3Al-Nb-Mo-Si ALLOYS显示文摘OXIDATIONRESISTANCEANDMECHANICALPROPERTIESOFTi_3Al-Nb-Mo-SiALLOYSSUNYufeng;CAOChunxiao;CAOJingxia;YANMinggao(BeijingInstitute?.. | SUN Yufeng CAO Chunxiao CAO Jingxia YAN Minggao (Beijing Institute of Aeronautical Materials,Beijing,100095),P.R.China | 1995 | Acta Metallurgica Sinica(English Letters)1995，8，Z1： | 1 |
| 4 | Bank size and small-and-medium enterprise (SME) lending: evi- dence from china 显示文摘 | SHEN YAN SHEN MINGGAO XU ZHONG | 2008 | World Development2008，，37： | 1 |
| 5 | Determination of structure of Al20Cu2Mn3 phase in Al-Cu-Mn alloys显示文摘 | Wang Shuncai Li Chunzhi Yan Minggao | 1989 | Materials Research Bulletin1989，24，10： | 1 |
| 6 | SLIP SYSTEMS AND DISLOCATION DISTRIBUTION IN α-PHASE OF SUPERPLASTICALLY DEFORMED Ti-6AI-4V ALLOY显示文摘The activated slip systems in the α-phase of the superplastically deformed Ti-6Al-4V alloywere analyzed by systematic operation method with TEM.The results show that thedominately activated slip systems in the α-phase are{01(?)0}〈2(?)0〉and{01(?)}2(?)0〉,The{0001}〈2(?)0〉system as well as the c+a dislocalions of b=[1/3]〈11(?)3〉will be acti-vated when the deformation temperature is lowered.Large amounts of TEM observations in-dicate that the dislocations in the α-phase were mainly activated near the triple grain bounda-ry junctions,α/α grain boundaries and α/β interlaces. | ZHAO Linruo ZHANG Shaoqing YAN Minggao Institute of Aeronautical Materials,Beijing,China Lab.No.4,Beijing Institute of Aeronautical Materials,Beijing 100095,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，4： | 1 |
| 7 | A calculation of the threshold stress intensity range for fatigue crack propagation in metals 显示文摘 | Yu Chonghua Minggao Yan | 1980 | Fatigue Engng Mater Struct1980，3，： | 1 |
| 8 | Ti_3Al PHASE PRECIPITATION DURING VIBRATION FATIGUING FOR A TITANIUM ALLOY显示文摘Ti_3AlPHASEPRECIPITATIONDURINGVIBRATIONFATIGUINGFORATITANIUMALLOY￥TaoChunhu;ZhangShaoqing;YanMinggao(InstituteofAeronauticalM?.. | Tao Chunhu Zhang Shaoqing Yan Minggao (Institute of Aeronautical Materials, Beijing 100095) | 1995 | 中国有色金属学会会刊:英文版1995，5，2： | 1 |
| 9 | Bank Size and Small- and Medium-sized Enterprise (SME) Lending: Evidence from China显示文摘 | Yan Shen Minggao Shen | 2009 | World Development2009，，4： | 1 |
| 10 | Nucleation and Formation of Stable and Metastable Phases in Undercooled AI-Li Melts显示文摘A modified nucleation and competitive growth kinetic theory considering unsteady nucleation andeffect of composition in dilute binary alloys was suggested,based on which the selections of δ.δ’and α phases in undercooled Al-Li melts were summarized by both isothermal and continuous cool-ing treatment methods. | Shenglong DAI Guifu YU Minggao YAN Institute of Aeronautical Materials,Beijing,100095,China | 1993 | Journal of Materials Science & Technology1993，9，3： | 0 |
| 11 | A New Dispersion-strengthening Phase in an Aged RST Al-8Fe-2Mo-2Zr-2Nd-0.7Ti-1.6Si Alloy显示文摘An effective dispersion-strengthening phase in Al-8Fe-2Mo-2Zr-2Nd-0.7Ti-1.6Si alloy wasidentified to be an aged precipitate phase with possible chemical stoichiometry of Al20(Ti,Mo)2 Ndand fcc crystal structure with ao=1.455 nm.The structure was determined to be Fm3m space group. | Shenglong DAI Guifu YU Minggao YAN Institute of Aeronautical Materials,Beijing,100095,China | 1993 | Journal of Materials Science & Technology1993，9，4： | 0 |
| 12 | Characteristics of Serrated Flow in Al-Li Single Crystals显示文摘Serrated flow has been investigated in binary Al-Li single crystals treated from as-quenched to overaged conditions. Serrations were observed during the deformation of crystaIs aged from 10to 100 h at 448 K. but not in the as-quenched and naturally aged conditions. The number of stress drops for serrations persistently increases within small stress drop limits as ageing time increases until attainment of peak-aged condition. Crystal orientations have some effects on stress drops for serrations. | Tian, Baohui Yan, Minggao Zhang, Yonggang Chen, Changqi | 1998 | Journal of Materials Science & Technology1998，14，5： | 0 |
| 13 | A MICROSTRUCTURAL ANALYSIS OF 7050 Al ALLOY显示文摘The microstructure of 7050 AI alloy in T74 condition has been studied by means of transmis-sion electron microscopy and dynamical diffraction simulation.It was found that the alloystudied contains mainly AI3Zr superlattice phase,η′-phase and Al7Cu2Fe constituent phase.The η′-phase has an orthorombic crystal structure with a=0.492 nm,b=0.852 nm andc=0.701 nm.The orientation relationship between the η′-phase and matrix was determinedas(101)m∥(010)η′[111]m∥[001]η′ | JIN Yan LI Chunzhi ZHAO Yingtao YAN Minggao Beijing Institute of Aeronautical Materials.Beijing,China | 1992 | Acta Metallurgica Sinica(English Letters)1992，5，2： | 0 |
| 14 | PREDICTION OF SURFACE DEFECTS IN DISK FORGING PROCESS FOR FGH95 ALLOY USING RING-LIKE BILLET BY COMPUTER SIMULATION显示文摘INTRODUCTIONTurbinediskisoneofthemostimportantpartsinaeroplaneengines.Forgingsuperaloyenginedisksinvolvesexpensivediematerial... | Li Yuanchun, Cui Jian and Yan Minggao Beijing Institute of Aeronautical Materials, Beijing 100095, P. R. China | 1998 | 中国有色金属学会会刊:英文版1998，8，4： | 0 |
| 15 | SOLIDIFICATION BEHAVIOR AND MICROSTRUCTURE EVOLUTION OF Si BEARING TiAl ALLOY显示文摘The solidification behavior of Ti 52 Al 48 x Si ( x =0, 0 5, 1 0, 2 0, 3 0, 6 0, mole fraction, %) alloys prepared by ingot metallurgy, has been studied with differential thermal analysis (DTA) and microstructure examination. Two kinds of Ti 5Si 3 phase were found in Ti 52 Al 48 x Si ( x =0 5, 1 0, 2 0) alloys. The first one was formed during L →Ti 5Si 3+ L 1, and the second one was characteristic of whiskers in eutectic morphology formed during L 2→α+Ti 5Si 3. The third kind of Ti 5Si 3 phase was formed in Ti 52 Al 48 3Si alloy by a eutectoid reaction of α→γ +Ti 5Si 3. With addition of Si up to 6 0 %, the solidification path was completely different from the other alloys. | Fu Sheng Sun, Chunxiao Cao, Yafang Han and Minggao Yan Beijing Institute of Aeronautical Materials, P.O. Box 81, Beijing 100095, China Seung Eon Kim and Yong Tai Lee Korea Institute of Machinery & Materials, 66 Sangnam, Changwon, Kyungnam, Korea | 1999 | 中国有色金属学会会刊:英文版1999，9，S1： | 0 |
| 16 | INFLUENCE OF DWELL TIME ON HIGH TEM-PERATURE LOW CYCLE FATIGUE (HTLCF) BEHAVIOR IN AN Nd-BEARING NEAR-α TITANIUM ALLOY显示文摘INFLUENCEOFDWELLTIMEONHIGHTEMPERATURELOWCYCLEFATIGUE(HTLCF)BEHAVIORINANNdBEARINGNEARαTITANIUMALLOYZhuZhishou,CaoChunxiao,M... | Zhu Zhishou, Cao Chunxiao, Ma Jimin, Gao Yang, Yan Minggao (Beijing Institute of Aeronautical Materials, Beijing, 100095, China) | 1997 | Chinese Journal of Aeronautics1997，10，3： | 0 |
| 17 | MICROSTRUCTURE STUDY OF CONSTITUENT PHASES IN 2024 SERIES Al ALLOYS显示文摘X-ray microanalysis,convergent beam electron diffraction(CBD)and selected area electrondiffraction(SAD)studies on the structures and compositions of the constituent phases in2024 series Al alloys have been conducted.Partial substitution of alloying elements is found tooccur in all the constituent phases,which cause small deviations from the stoichiometric com-positions reported in these ternary compounds.The dominant phase is α-Al12(FeMn)3Si whichhas a body center cubic crystal structure with the Im■ space group and a=1.25 nm.The nextdominant phase is Cu2FeAl7 which has a primitive tetragonal crystal structure with theP4/mnc space group and a=0.6336 nm,c=1.487 nm.The minor phase is α’-Al12Fe3Si hav-ing α primitive cubic crystal structure with the Pm■ space group and α=1.27 nm. | WANG Shuncai LI Chunzhi YAN Minggao Institute of Aeronautical Materials,Beijing,China BIAN Weimin Northeast Institute of Technology,Shenyang,China WANG Shuncai Graduated Student,Institute of Aeronautical Materials,Beijing 100095,China | 1990 | Acta Metallurgica Sinica(English Letters)1990，3，2： | 0 |
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