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32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017

作者： Jin, Li Liu, Bangyin Duan, Shanxu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781509053667

This paper presents a comprehensive analysis of the zero-voltage-switching (ZVS) operation range of the isolated bidirectional three-level (3L) dual active bridge (DAB) DC-DC converter with phase shift (PS) control. On this basis, the parameters optimized of 3L-DAB can be proposed to meet the requirements of ZVS under the PS control, which will improve the performance features of 3L-DAB by reducing the losses and increasing efficiency. At last, the simulation results showed agreement with theoretical analysis, and the theoretical analysis showed a great guidance for parameters design and performance optimization of 3L-DAB. © 2017 IEEE.

关键词： DC-DC converters

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Design of high temperature gate driver for SiC MOSFET for EV motor drives

Design of high temperature gate driver for SiC MOSFET for EV...

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2017 IEEE Transportation Electrification Conference and Expo, Asia-Pacific, ITEC Asia-Pacific 2017

作者： Wang, Hanxiang Jiang, Dong State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781538628942

High temperature (HT) gate driver is a key technology for the motor drive application for electrical vehicle (EV) in HT environment. Based on the available HT devices, this paper introduces the design of HT gate driver for SiC MOSFET. The gate driver architecture with isolation function is discussed first. Then, gate driver hardware design is presented. Besides the basic driving function of driving ability and isolation, the over current protection and cross-talk suppression functions of the gate driver are emphasized and simulated, too. With the design process in this paper, SiC MOSFET can be driven stably and reliably at HT. © 2017 IEEE.

关键词： Design

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Optimal design of saturated switched reluctance machine for low torque ripple and high average torque

Optimal design of saturated switched reluctance machine for ...

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2017 IEEE International Magnetics Conference, INTERMAG 2017

作者： Cui, X. Sun, J. Gu, C. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781538610862

关键词： Rare earths

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Impact of application of SiC devices in motor drive on EMI 32

Impact of application of SiC devices in motor drive on EMI

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32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017

作者： Fang, Zhihao Jiang, Dong Shen, Zewei Qu, Ronghai State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781509053674

This paper gives a study on the EMI noise problem of motor drives, especially the impact of application of fast-switching SiC devices. First, the noise source model has been analyzed and the two major factors: device switching action and inverter switching frequency have been claimed. Device switching performance analysis has been done to show that the fast switching speed will generate bigger EMI noise at EMI high frequency range, ringing in the device switching can worsen the EMI noise near the ringing frequency, too. In the meantime, increasing of switching frequency of inverter can bring bigger EMI noise at EMI low frequency range. With variable switching frequency, EMI peak value can be reduced for the motor drive. But the average EMI of SiC motor drive is still bigger than Si motor drive which is with lower average switching frequency. The analysis has been supported by experimental results. The challenge of EMI should be considered for motor drive with SiC devices for advanced applications. © 2017 IEEE.

关键词： Silicon carbide

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Research on Output Scenarios of Offshore Wind Power Considering Characteristics of Marine Weather

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Journal of Physics: Conference Series 2021年第1期1993卷

作者： Honglin Chen Xing Chen Hao Yu Suhua Lou Yong Lin Liang Xu Power System Planning Research Center of Guangdong Power Grid Co. Ltd. Guangzhou 510080 Guangdong Province China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei Province China China-EU Institute for Clean and Renewable Energy Huazhong University of Science and Technology Wuhan 430074 Hubei Province China Guangdong Power Grid Co. Ltd. Guangzhou 510080 Guangdong Province China

Accurate modeling of stochastic wind power output is one of the key links in the optimal operation of power systems with large-scale wind power. According to the output characteristics of offshore wind farms, a data-driven method that models offshore wind power output scenarios is proposed in this paper. This method takes full account of the marine climate characteristics to study the offshore wind farm output data seasonally and identifies the main climatic elements affecting the output of offshore wind farms through correlation analysis. Meanwhile, the evaluation index of output characteristics is established. In order to reflect the influence of marine climate on the output of offshore wind farms, the climatic factors are used as an indicator to distinguish different weather. Accordingly, the output scenarios of offshore wind farms in extreme and non-extreme weather are determined, and the corresponding probability calculation method is proposed.

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Numerical study of transition between even and odd toroidal Alfvén eigenmodes on EAST

arXiv

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arXiv 2019年

作者： Hou, Yawei Kim, Charlson C. Zhu, Ping Zou, Zhihui Hu, Youjun Yan, Xingting CAS Key Laboratory of Geospace Environment Department of Engineering and Applied Physics University of Science and Technology of China Hefei Anhui230026 China KTX Laboratory Department of Engineering and Applied Physics University of Science and Technology of China Hefei Anhui230026 China SLS2 Consulting San DiegoCA92107 United States International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan Hubei430074 China Department of Engineering Physics University of Wisconsin-Madison MadisonWI53706 United States Institute of Plasma Physics Chinese Academy of Sciences Hefei Anhui230031 China

Linear simulations of toriodal Alfvén eigenmodes (TAEs) driven by energetic particles (EPs) on EAST (Experimental advanced Superconducting Tokamak) are performed using the hybrid-kinetic MHD (HK-MHD) model implemented in NIMROD code. The EAST equilibrium is reconstructed using the EFIT code based on experimental measurement. The "slowing down"distribution is adopted for modeling the equilibrium distribution of the energetic ions from the deuterium neutral beam injection on EAST. The frequency, the dominant poloidal mode number, the radial location and the detailed 2D mode structure of the TAE/RSAE/EPM modes are consistent between the eigenvalue analysis and the NIMROD simulation. As the β fraction of EP increases, a transition between even and odd TAEs occurs, along with that between the ballooning and anti-ballooning mode structures. When the β fraction of EP is close to the transition threshold, both types of TAEs coexist. Copyright © 2019, The Authors. All rights reserved.

关键词： Eigenvalues and eigenfunctions

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Research of an Axial Flux Stator Partition Hybrid Excitation Brushless Synchronous Generator.

Research of an Axial Flux Stator Partition Hybrid Excitation...

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International Conference on Magnetics (INTERMAG)

作者： C. Ye Y. Du J. Yang X. Liang F. Xiong W. Xu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

A vehicular generator has stringent requirements on its weight and volume. As a combination of permanent magnet and electric excitation motor, hybrid excitation machine could meet the requirements of vehicular generator, with small size, light weight, adjustable output voltage. In this paper, an axial flux stator partition hybrid excitation brushless synchronous generator (ASHG) is proposed. First, the structure and operation principle of ASHM is illustrated. Afterwards, the shape of the magnetic pole is optimized to obtain the air-gap flux density with low harmonic content. Moreover, the regulation performance of the magnetic field and output voltage are investigated by three dimensional finite element analysis (3D FEA). The result indicates that ASHG has a high performance of adjusting terminal voltage. It can improve the generator efficiency, power density and stability comparing with the conventional vehicular generator.

关键词： Magnetics Conferences

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Design an Analysis of a Water-Cooled Axial Flux Permanent-Magnet Machine for Large Power Direct-Driven Applications

Design an Analysis of a Water-Cooled Axial Flux Permanent-Ma...

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International Conference on Electrical Machines, ICEM

作者： Jian Li Yang Lu Yun-Hyun Cho Ronghai Qu State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology( Wuhan China Dept. of Electrical Engineering Dong-A University Busan South Korea

This paper presents a design process and a detailed multi-physics analysis of an axial flux permanent magnet synchronous machine for large power direct-drive applications. The machine in this paper is 130kW at 26 rpm with a dual-stator inner-rotor structure. A stator core which is assembled with segmented and pre-wound teeth is first proposed and applied in a large power axial flux PM machines. Through this method, the challenges of manufacturing large diameter AFPM machines can be solved. A novel water-cooling system is embedded in the machine to transfer the heat. In addition, assembling procedure and manufacture process are also proposed. Finally, based on the multi-physics design, a prototype machine is manufactured and tested. The experiment results match well with the finite-element analysis (FEA).

关键词： Windings Torque Stator cores Forging Solid modeling Welding

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Reserve Improvement by Load Curtailment Service for Gas-Electric Systems Integrated with Wind Power

Reserve Improvement by Load Curtailment Service for Gas-Elec...

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2018 4th International Conference on Green Materials and Environmental engineering(GMEE 2018)

作者： Jia-ning LIU Kai DONG Meng-lin ZHANG Ling-ling LE Xiao-meng AI Guangdong Power Grid Power Dispatch Control Center State Key Laboratory of Advanced Electromagnetic Engineering and Technology (School of Electrical and Electronic Engineering Huazhong University of Science and Technology)

A new model is proposed for the optimal scheduling of gas-electric integrated energy systems, considering the incentive demand response(IBDR) to provide the reserve ancillary service. By incorporating the IBDR, one hand, the system can give full play to the complementary functions of different energy sources to enhance the efficiency of the system;on the other hand, more flexibility can be utilized to cope with the uncertainty of wind power with IBDR providing reserves with conventional units simultaneously. We establish the IBDR model with segmental price-quantity curves, and the transient gas flow and steady state power flow are combined to formulate the operation model of gas-electric integrated systems. A 6-node power network and a 12-node natural gas network were selected to construct a gas-electric integrated energy system. The simulation results show that the IBDR can improve the flexibility of the system and decrease the total operation cost of the gas-electric integrated energy system.

关键词： Gas-electric systems Wind power integration Reserve ancillary service Incentive-based demand response

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Electrical Behavior against Current Impulse in ZnO Varistor Ceramics with SiO2 Addition

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Journal of Physics: Conference Series 2020年第1期1637卷

作者： Bowen Wang Zhen Fang Zhiyao Fu Yongjing Peng State Key Laboratory of Disaster Prevention & Reduction for Power Grid Transmission and Distribution Equipment State Grid Hunan Electric Power Company Disaster Prevention and Reduction Center Changsha410129 China. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan 430074 Hubei China

SiO2 addition effect on electrical behaviour against current impulse in the ZnO varistors was investigated. SiO2 acts as a controller in ZnO grain growth, decreasing the grain size of ZnO from 8.87 to 5.86 μm, which in turn results in an increase in breakdown voltage E1mA from 192.77 to 252.57 V/mm. SiO2 has a significant influence on the current energy withstand capability and impulse aging characteristics. The results indicated that the SiO2 content was optimized at 1.5 mol%, exhibiting the best energy withstand capability of 332.03J/cm3 and clamping ratio of 1.71.

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