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International Conference on Electrical Machines and Systems (ICEMS)

作者： Cheng Zhu Kai Yang Yang Liu YingLi Zhang ZhiCheng Pan XuBiao Wei State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology China

ISBN: (纸本)9781479951635

This paper introduces a small size and low cost controller of permanent magnet synchronous motor(PMSM). Firstly, the control strategy and the spatial position coordination of PMSM and the controller are described. A small PMSM and the controller are presented by some pictures. Then, the schematic of controller is presented, showing the main control chip, main power chip and the circuit wiring of controller. Besides, position sensors and lead angle are introduced, the influences of the sensors' position and how the lead angle works are discussed. The different control effects are shown by oscilloscope and the motor's working efficiency is tested on dynamometer. At last, by analysing the testing results, we can get some conclusions.

关键词： Lead Pins Voltage control Insulated gate bipolar transistors Capacitive sensors Magnetic sensors

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Optimal efficiency control of modular PMSM on EVs based on iso efficiency contours

Optimal efficiency control of modular PMSM on EVs based on i...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Yingli Zhang Kai Yang Hongqin Xie Cheng Zhu Xubiao Wei Zhicheng Pan State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology China

ISBN: (纸本)9781479951635

Efficiency is a critical issue of electric vehicles (EVs) popularization. An optimal energy saving regulator of modular permanent magnet synchronous motor (M-PMSM) on EVs based on iso efficiency contours is studied in this paper. According to motor efficiency which depends on different torque and speed combinations, use different numbers of modules for the economic operation of EV. Simulation shows the controller can achieve maximum efficiency in full speed range. The bidirectional switching process from dual module mode to single module mode or conversely is smooth and reliable. The control system has outstanding dynamic performance.

关键词： Torque Permanent magnet motors Induction motors Synchronous motors Switches Regulators Economics

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The research of marine shaft generator system based on brushless doubly-fed machine

The research of marine shaft generator system based on brush...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Ju-ming Gao Shan-ming Wan Li-li Liu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology China

ISBN: (纸本)9781479951635

Using ship main engine to drive brushless doubly-fed machine to generate electricity can change the condition that the shipboard electric power system has been dependent on diesel generator set, and reduce operating costs. This paper analyzes the mathematical model and control principle of brushless doubly-fed machine independent generator system based on scalar control, and put forward the control strategy without speed sensor. Finally, setting up a system to simulate the condition of marine shaft generator system and many tests show the system agrees with the shipboard electric power requirements.

关键词： Windings Mathematical model Rotors Voltage control Marine vehicles Frequency control Educational institutions

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Photonics: Toward Scalable Flexible Nanomanufacturing for Photonic Structures and Devices (Adv. Mater. 47/2016)

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advanced Materials 2016年第47期28卷

作者： Wen Qiao Wenbin Huang Yanhua Liu Xiangmin Li Lin‐Sen Chen Jian‐Xin Tang Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215123 China College of Physics Optoelectronics and Energy Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215006 China Micro‐/Nano‐technology Research Center State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong University Xi'an Shanxi 710049 China Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou 215123 China

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Effect of pH value on the properties of SnO2 nano-cystalline for dye sensitized solar cells 5

Effect of pH value on the properties of SnO2 nano-cystalline...

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5th Annual Meeting on Testing and Evaluation of Inorganic Materials, TEIM 2014

作者： Song, Jieguang Hua, Lin Shen, Qiang Wang, Fang Zhang, Lianmeng Hubei Key Lab of Advanced Technology of Automotive Components School of Automotive Engineering Wuhan University of Technology Wuhan430070 China State Key Lab. of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Department of Materials Engineering Jiujiang University Jiujiang Jiangxi332005 China

ISBN: (纸本)9783038353331

The study of dye-sensitized solar cells (DSCs) based on nano-crystalline films of high band gap semiconductors is a progressive field of research that is being carried out by scientists in a wide range of laboratories. To improve the conversion efficiency of the DSCs, the SnO2 nanorots photocurrent is prepared via the hydrothermal method, and characterized by XRD, FESEM, BET and Absorption spectrum. Though analysis the results, the conclusion is shown the pure SnO2 is preparation, the SnO2 nano-crystalline both shows the single phase that SnO2 from the sule solution to kalin solution. The prepared SnO2 nano-crystalline under pH=3 shows the particle-shape crystalline, the surface area of SnO2 nano-crystalline is 86.3412m2/g. The prepared SnO2 nano-crystalline under pH=7 shows the short rod-shape crystalline, the surface area of SnO2 nano-crystalline is 58.3408m2/g. The absorbance of SnO2 nano-crystalline shows the strong absorption in the ultraviolet ray range, the absorbance of synthesized SnO2 nano-crystalline under pH=11 shows the highest value. © (2015) Trans Tech Publications, Switzerland.

关键词： Dye-sensitized solar cells

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Novel Indexes and Method for Power Grid Blackout Risk Assessment

Novel Indexes and Method for Power Grid Blackout Risk Assess...

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International Conference on Mechatronics engineering and Computing technology (ICMECT)

作者： Lu, Xiaojun Zeng, Kaiwen Liao, Shiwu Wen, Jinyu Lu, En Long, Fei Wang, Ning State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei Province China Guangdong Power Grid Power Dispatching Control Center Guangdong Power Grid Corporation 0 Guangzhou 510600 Guangdong Province China

ISBN: (纸本)9783038351153

A set of blackout risk assessment indexes is established according to Electricity Accident (Incident) Investigation Procedures of China Southern Power Grid (CSPG) (pilot) and Guide on Operational Risk Evaluation of CSPG, which can calculate risk values of electricity accidents (incidents). The calculation process is discussed in detail. Based on the proposed indexes and OPA blackout model, a blackout risk assessment method for power system is put forward, with which blackout risk for all 500kV buses in Guangdong Power Grid are evaluated. Weak areas in power system are identified and their inducements are analyzed. The identification results accord with actual system long-term operation experience, which verifies the correctness of the indexes and method.

关键词： risk Assessment risk indexes OPA model cascading failure

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The characteristic analysis of electromagnetic and AC loss for a high temperature superconducting adjustable reactor with considering the structure of superconducting winding

The characteristic analysis of electromagnetic and AC loss f...

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3rd International Conference on Energy and Environmental Protection, ICEEP 2014

作者： Song, Meng Shen, Shi Feng Hu, Nan Nan Cao, Kun Nan Ren, Li Yunnan Electric Power Research Institute Kunming City Yunnan Province. 650217 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan City Hubei Province 430074 China

ISBN: (纸本)9783038351368

The power equipments made of high-temperature superconductor (HTS) widely applied in power system in the recent years. A HTS adjustable reactor (HTS-AR) is a novel controllable reactor with the controllable windings made of HTS tapes. Shunt HTS-AR can regulate the reactive power of power and reduce the transmission loss. However, the leakage magnetic flux of the superconducting windings is relatively large, which may restrict the application of the HTS-AR in high-voltage transmission line. Basing on the research of the structure design for HTS winding, the characteristic analysis of magnetic and AC loss of HTS-AR with considering the structure of superconducting winding is shown in this study. The results show that the HTS winding with the ladder-like structure has a better performance compares with HTS winding with the solenoid structure. © (2014) Trans Tech Publications, Switzerland.

关键词： High temperature superconductors

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Organic light-emitting diodes fabricated on nanostructured AZO: A low-cost way towards enhanced light extraction for large area lighting application

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Digest of Technical Papers - SID International Symposium 2014年第1期45卷 1526-1529页

作者： Jiang, Yibin Li, Guijun Li, He Chen, Shuming Kwok, Hoi-Sing State Key Lab on Advanced Displays and Optoelectronics Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Department of Electrical and Electronic Engineering South University of Science and Technology of China Shenzhen 518055 China

Organic light-emitting diodes (OLEDs) were fabricated on nanostructured aluminum doped zinc oxide (AZO). The nanostructured AZO was formed by selectively etching as-prepared AZO film. The nanostructured AZO serves not only as low-cost indium-free anode but also as internal light extraction structure. OLEDs on it showed a 25.7% efficiency enhancement compared to the conventional ones. © 2014 Society for Information Display.

关键词： Zinc oxide

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electromagnetic design optimization of single-sided linear induction motor for improved drive performance based on linear metro application

Electromagnetic design optimization of single-sided linear i...

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Australasian Universities Power engineering Conference, AUPEC

作者： Dong Hu Wei Xu Ronghai Qu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

Single-sided linear induction motors (SLIMs) have been increasingly developed in industries in the past ten years, especially in transportation systems. This is basically due to their merits of direct thrust, high acceleration and deceleration, less mechanical loss, etc. However, for the SLIMs special physical structure, including the cut-open magnetic circuit, different width between primary and secondary (along the axial direction), they suffer from longitudinal end-effect and transversal edge-effect, which would make their mutual inductance and secondary equivalent resistance change unregularly, and hence increase the complexity of their equivalent circuit model (ECM). Meanwhile, for the influence by skin effect resulted from the secondary eddy current, the resistance of secondary back-iron, etc., the SLIMs are inherited by seriously partial electromagnetic saturation or nonlinear effect particularly in large current excitation condition, and their accurate ECM are difficult to get, which might bring great difficulty to their electromagnetic design and performance analysis. In this paper, first, one improved ECM that fully considers longitudinal end-effect, transversal edge-effect, skin effect and electromagnetic saturation of secondary sheet back-iron, is presented. Second, the influence of different structure parameters on SLIM key drive indexes, e.g. thrust, efficiency and power factor, is analyzed. Third, a multi-objective optimization function is established based on genetic algorithm (GA), which aims to increase the efficiency, power factor and thrust as well as to reduce primary weight simultaneously.

关键词： Electronic countermeasures Reactive power Resistance Educational institutions Optimization Equivalent circuits Magnetic flux

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Manipulation of Amorphous‐to‐Crystalline Transformation: Towards the Construction of Covalent Organic Framework Hybrid Microspheres with NIR Photothermal Conversion Ability

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Angewandte Chemie 2016年第45期128卷

作者： Jing Tan Supawadee Namuangruk Weifu Kong Nawee Kungwan Jia Guo Changchun Wang State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Lab of Advanced Materials Fudan University 220 Handan Road Shanghai 200433 China National Nanotechnology Center (NANOTEC) National Science and Technology Development Agency Pathumthani 12120 Thailand Department of Chemistry Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand

An approach to transforming amorphous organic networks into crystalline covalent organic frameworks (COFs) with retention of the colloidal nanosize and uniform morphology is presented. Specifically, Fe 3 O 4 nanoclusters are encapsulated by a disordering polyimine network via the Schiff‐base reaction. The formed imine bonds could be reconstructed under thermodynamic control to reform the polyimine networks into imine‐linked COFs in situ. Such a core–shell microsphere exhibits the uniform size and spherical shape, controllable COF shell thickness, accessible surface modification, and improved solution dispersibility as well as maintenance of high surface area, periodic micropores, and superior magnetic responsiveness. Additionally, the photothermal conversion effect is demonstrated for the first time on the nanoCOF layers upon exposure to near infrared light, providing convincing evidence for potential use in phototherapy.

关键词： Imine Kompositmikrokügelchen Kovalente organische Gerüste Nanocluster Photothermische Umwandlung

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