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method of open-circuit faults in matrix converter WANG Lina, ZHU Hongyue (School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China) Abstract: Reliable diagnosis and location of matrix converter failure switch is the basis for efficient implementation of fault isolation and fault-tolerant technology. Based on the simulation platform of MC-PMSM system......
)04-1281-06 Catalytic synthesis of 1-hydroxy-4-oxo-α-ionone from 3-oxo-α-ionone with air supported by alumina TANG Rui-ren, LI Fei, ZHANG Rui-rong, ZHOU Ya-ping (School of Chemistry and Chemical Engineering... conversion can be 100% and yield of 1-hydroxy-4-oxo-α-ionone can be up to 85%. The catalytic activity of Al2O3 is maintained after repeated use for many times. Key words: alumina; support; catalytic......
and physico-chemical characterisation of La1-xCexCoO3+δ perovskite catalyst and its methane catalytic combustion CUI Mei-sheng, LI Ming-lai, ZHANG Shun-li, LONG Zhi-qi, CUI Da-li, HUANG Xiao-wei (Grirem Advanced Materials Co. Ltd, General Research Institute for Non-ferrous Metals, Beijing 100088, China) Abstract: Perovskite oxides LaCoO3 methane catalytic materials were prepared with citrate......
=diglycol aldehyde bis-arginine). The present paper deals with a synthetic method and catalytic properties of obtained complexes. The result shows that proper pH value is important for synthesis of the complexes and compositions of the lighter and the heavier rare earth complexes are different under the same reaction condition. Some new complexes obtained have proved their catalytic activity and 80......
; 文章编号:1672-7207(2017)03-0694-07 Integrated magnetics structure DC/DC converter for electric vehicles XIA Xiangyang1, KONG Xiangji1, TANG Xin1, PENG Mengni1, RAN Chengke1, 2... that traditional energy storage device of power density and low conversion efficiency greatly limit the electric vehicle handling and performance, a novel DC/DC converter was proposed based......
转炉提钒渣对镁碳砖的侵蚀王广恩1,王雨1,谢兵1,李新生1,郭戌1,李晓军1(1.重庆市重庆大学材料科学与工程学院)摘 要:在转炉提钒温度下,通过把镁碳砖试样浸入不同V2O3,FeO,TiO2,MnO,MgO含量的转炉提钒渣中,研究转炉提钒渣中氧化物含量的变化对镁碳砖侵蚀行为的影响,得出转炉提钒渣中氧化物含量与镁碳砖侵蚀速率的关系;使用SEM-EDS观察并分析侵蚀后镁碳砖的微观结构及物相组成,发现被C基质还原出来的金属铁颗粒;并基于试验结果对镁碳砖的损毁进行了讨论.关键词:转炉; 镁碳砖; 侵蚀;......
梅钢4号烧结机主抽风机变频软启动系统刘雁飞1,高鹏双1,刘慧芬1,周宇栋2(1.湖南省长沙市中冶长天国际工程有限公司电力分院2.西门子(中国)有限公司)摘 要:介绍一个采用一台西门子GL150型LC I变频器依次启动两台6 900 kW同步电动机拖动的主抽风机的变频软启动系统.变频器的控制方式为转矩控制,启动方式为分段加速,变频软启动系统通过降压变压器-GL150变频器-升压变压器启动10 kV同步电动机.GL150型变频器采用大功率晶闸管元件,变频软启动系统在启动中通过直接检测定子电压,电流来计算转子位置,不......
Inorganic shell nanostructures to enhance performance and stability of metal nanoparticles in catalytic applicationsInhee Choi1,Hyeon Kyeong Lee2,Gyoung Woo Lee2,Jiyull Kim2,Ji Bong Joo21. Department... research activity on the synthesis of inorganic shell nanostructures to enhance the catalytic performance and stability of metal nanoparticles in catalytic applications.First, we introduce general synthetic......
Effect of Na+ on catalytic performance of CoCe/ZSM-5 catalysts for oxidation of tolueneQingping Zou1,Mingqing Liu2,Mengjie Fan1,Yaping Ding1,Yingwen Chen1,Shubao Shen11. College of Biotechnology... catalyst was prepared by ultrasonic-assisted impregnation for the catalytic combustion of toluene.To study the effect of Na+ on catalytic performance of CoCe/ZSM-5 catalysts,a series of different Si/Al ZSM-5......
Synergistic catalytic removals of NO,CO and HC over CeO2 modified Mn-Mo-W-Ox/TiO2-SiO2 catalystQijie Jin,Yuesong Shen,Guorong Sui,Xingjun Tao,Youchun Pan,Shemin ZhuJiangsu National Synergetic...:A series of Mn-Mo-W-Ox/TiO2-SiO2 catalysts was modified with CeO2 using an extrusion molding method. The catalytic activities of the obtained catalysts were......