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Channeled substrate window twin stripe GaAs/GaAlAs visible laser: Fabrication and steady state analysis

Chinese Journal of Lasers 1992年第4期 3-9页

作者： Xiaobo Zhang, Wen Wang , Zhixian Cong, Fanghai Zhao, Guotong Du, Xizuo Jin, Dingsan Gao(Department of Electronics Science, Jilin University, Changchun 130023,China) Beijing General Research Institute for Nonferrous Metals, Beijing, China Department of Methematics, Jilin University Department of Methematics, Jilin University

GaAs/GaAlAs high power window stripe lasers are developed with straight ac-tive layer in region adjacent to facet and curved active layer in central *** one-step liq-uid-phase epitaxy(LPE)growth is used in the fabvrication to from two internal current patheslaterally,allowing of a very simple fabrication *** coupling from two stimulatingregions makes less beam *** steady state analysis of such laser structure agreewell with experimental results.

关键词： GaAs/GaAlAs visible laser steady state analysis

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analysis and control of wind-driven self-excited induction generators connected to the grid through power converters

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Frontiers in Energy 2012年第4期6卷 403-412页

作者： S. Senthil KUMAt N. KUMARESAN N. Ammasai GOUNDEN Namani RAKESH Department of Electrical and Electronics Engineering National Instituteof Technology Tiruchirappalli Tamil Nadu 620015 India

The analysis of the wind-driven self-excited induction generators （SEIGs） connected to the grid through power converters has been developed in this paper. For this analysis, a method of representing the grid power as equivalent load resistance in the steady-state equivalent circuit of SEIG has been formulated. The technique of genetic algorithm （GA） has been adopted for making the analysis of the proposed system simple and straightfor- ward. The control of SEIG is attempted by connecting an uncontrolled diode bridge rectifier （DBR） and a line commutated inverter （LCI） between the generator term- inals and three-phase utility grid. A simple control technique for maximum power point tracking （MPPT） in wind energy conversion systems （WECS）, in which the firing angle of the LCI alone needs to be controlled by sensing the rotor speed of the generator has been proposed. The effectiveness of the proposed method of MPPT and method of analysis of this wind-driven SEIG-converter system connected to the grid through power converters has been demonstrated by experiments and simulation. These experimental and simulated results confirm the usefulness and successful working of the proposed system and its analysis.

关键词： self-excited induction generator (SEIG),renewable power generation power converters maximumpower point tracking (MPPT) steady state analysis powergeneration systems

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Control Strategy and Function Design Based on Lever Analogy

Control Strategy and Function Design Based on Lever Analogy

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FISITA 2012 World Automotive Congress--Volume 5:Advanced Transmission System and Driveline

作者： Hua Tian Peng Chen Powertrain Department Pan Asia Technical Automotive Center

Lever analogy is very useful in analyzing gear-train including more than one planetary gear *** lever analogy is a translational-system representation of the rotating parts for the planetary *** lever analogy to GM 6T40 E transmission,kinematic and dynamic analysis is shown in this *** based shift control strategy is based on dynamic lever *** setting target output torque and desired turbine speed profile,the clutch pressure and torque request to engine can be *** more investigation on lever analogy,enhanced control strategy and new function are already invented.

关键词： Lever analogy Planetary gear steady state analysis Dynamic analysis Shift control strategy

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