检索结果-内蒙古大学图书馆

3rd IEEE China International Youth Conference on Electrical engineering, CIYCEE 2022

作者： Jiao, Zixiao Jiang, Zhonghe Li, Zhen Li, Keze Yuan, Jianjun School of Electrical and Electronic Engineering Huazhong University of Science and Technology International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China Institute of Fusion and Plasma Physics School of Electrical and Electronic Engineering China

ISBN: (纸本)9781665477321

Compared with massive gas injection(MGI), shattered pellet injection(SPI), as a method which is likely to apply on ITER, has advantages in deep injection and faster penetration speed. This paper introduces the NIMROD(non-Ideal MHD with Rotation, Open Discussion) code coupled with SPI module to carry out numerical simulations. Based on the SPI experiments on the J-TEXT, a set of SPI parameters are selected and scanned, including impurity amount, shattered degree and plume speed. From the results, simulations are in good agreements with experiments. Besides, the paper also achieve dual-SPI simulations which has mainly analyzed magnetic stochasticity and radiation. Though simulation results show dual-SPI may not evoke a higher MHD instabilities, it will bring different modes increasing situations. Dual-SPI will produce more radiation, advance thermal quench(TQ) and heighten current quench(CQ) rate. What's more, dual-SPI can improve radiation asymmetry apparently. © 2022 IEEE.

关键词： Numerical models

来源：评论

学校读者我要写书评

暂无评论

Observation of distinct ohmic plasma current evolution on EAST 48

Observation of distinct ohmic plasma current evolution on EA...

引用

48th European Physical Society Conference on Plasma Physics, EPS 2022

作者： Zhang, Q. Zhuang, G. Xie, J.L. 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 Wuhan430074 China School of Nuclear Science and Technology University of Science and Technology of China Hefei230026 China

来源：评论

学校读者我要写书评

暂无评论

Applied to calibrate the new intelligent bearing of NiCr/NiSi film thermocouple 7

Applied to calibrate the new intelligent bearing of NiCr/NiS...

引用

7th International Conference on Aeronautical, Aerospace and Mechanical engineering, AAME 2024

作者： Liu, Zhihui Guo, Tengda Cheng, Yongjun Wang, Bi Li, Yangsen Chen, Weiyu Wang, Zixi Ding, Wanyu State Key Laboratory of Tribology in Advanced Equipment Tsinghua University Beijing100084 China College of Materials Science and Engineering Dalian Jiaotong University Dalian116028 China Laboratory of Low Frequency Electromagnetic Communication Technology with the WMCRT CSSC China State Key Laboratory of High-end Compressor and System Technology Anhui Hefei230031 China State Grid Fuiian Electric Power Co. Ltd China Fujian Power Transmission and Transformation Engineering Co. Ltd China

The purpose of this paper is to study the calibration method of new intelligent bearing applied to NiCr/NiSi film thermocouple. Firstly, the basic principle and characteristics of NiCr/NiSi film thermocouple and intelligent bearing are introduced, and then the design and realization process of intelligent bearing are elaborated, including material selection, structural design, manufacturing process and so on. Then, this paper puts forward the calibration method of intelligent bearing, and verifies its effectiveness through experiments. The experimental results show that the Seebeck coefficient of NiCr/NiSi thin film thermocouple new intelligent bearing is 41.00 μV/°C, and the Seebeck coefficient of standard K thermocouple is 41.20 μV/°C. The new intelligent bearing has high sensitivity and stability, and can achieve fast response and accurate measurement. Finally, this paper summarizes the research results, and looks forward to the future research direction. © Published under licence by IOP Publishing Ltd.

关键词： Thermocouples

来源：评论

学校读者我要写书评

暂无评论

Island-Oriented Multi-Energy Reef Pan Power Plant and Its Application - Layout Optimization Study and Capacity Exploration

Island-Oriented Multi-Energy Reef Pan Power Plant and Its Ap...

引用

Electrical engineering (CIYCEE), IEEE China International Youth Conference on

作者： Weijie He Fanrong Wei Xiangning Lin Samir M. Dawoud The State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China The Department of Electrical Power and Machines Engineering Tanta University Tanta Egypt

ISBN: (数字)9798331530174

ISBN: (纸本)9798331530181

In response to the problem of unreasonable power supply layout on islands, this paper fully evaluates the status of wind/light/wave energy resources in the island and its surrounding reef area scenarios. Then, based on bladeless wind turbines, floating solar panels and oscillating float wave energy capture devices, an integrated construction layout plan for multi-energy reef power stations was proposed. And with the maximum annual total power generation as the objective function, a layout optimization and capacity exploration model was established. The CPLEX mixed integer programming algorithm was used to solve the model example. The example results show that the construction layout plan proposed in this paper is reasonable and feasible, and has unique advantages in island scenarios.

关键词： Renewable energy sources Power supplies Layout Software algorithms Software Wind turbines Solar panels Wave energy conversion Power generation Optimization

来源：评论

学校读者我要写书评

暂无评论

Reduction of Rotor Loss in High-Speed Electrical Machines With a Novel Composite Sleeve

Reduction of Rotor Loss in High-Speed Electrical Machines Wi...

引用

International Conference on Electrical Machines and Systems (ICEMS)

作者： Minyue Ding Haiyang Fang Ronghai Qu State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Enginnering Huazhong University of Science and Technology Wuhan China

The rotor eddy-current loss caused by high frequency current and magnetic field changes is very high in high-speed permanent magnet machines (HSPMM). This is one of the important factors contributing to the overheat of the PMs. Since the sleeve loss is the main component of the overall rotor loss, it is widely concerned in HSPMM. In this paper, a novel composite sleeve is proposed to reduce the rotor loss. The proposed sleeve is applied to a 90kW, 16000r/min PM machine, the total rotor loss and temperature rise are respectively decreased by 44.5% and 18.7% (25.2°C) compared with a conventional carbon fiber sleeve. Furthermore, the rotor maximum stress is obtained and validated to be within the safe range.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Active Damping of DC Transformer with ISOP Structure Based on Impedance Reshaping

Active Damping of DC Transformer with ISOP Structure Based o...

引用

IEEE Energy Conversion Congress and Exposition, ECCE

作者： Yangfan Chen Yu Zhang State Key of Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Energering Huazhong University of Science and Technology Wuhan China

The DC transformers (DCTs) constructed by input-series-output-parallel (ISOP) structure with dual active bridge (DAB) submodules (SMs) would face the risk of instability due to the equivalent inductance of input power line, which are neglected in most existing research. This work evaluates the stability characteristics of DCTs and proposes an active damping method for DCTs to ensure the stability. First, the input impedance of DCT is derived. Then, the stability characteristics of DCT are analyzed based on Nyquist Criterion. Next, an impedance reshaping control scheme (IRCS) for DCT is proposed to reshape the input impedance of DCT to achieve stabilization, which is easy to be implemented and no additional sensors are needed. Finally, the relevant experiments validate the performance of IRCS.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Performance Analysis of Nested-loop Secondary Linear Doubly-fed Machine Considering End Effects

引用

CES Transactions on Electrical Machines and Systems 2022年第3期6卷 298-305页

作者： Yaping Zhang Jian Ge Wei Xu Weiye Li Yinglu Luo Shihu Su Yunfeng He the State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China IEEE Xiangyang CRRC Zhuzhou Institute CO. LTDXiangyang412001China CRRC Zhuzhou Motor Co. Ltd.Zhuzhou412001China

Nested-loop secondary linear doubly-fed machine(NLS-LDFM) is a novel linear machine evolved from rotary brushless doubly-fed induction machine, which has a good application prospect in linear metro. In order to analyze the performance of NLS-LDFM, the mechanism and action rules of end effects are investigated in this paper. Firstly, the mechanism of static and dynamic end effects is analyzed in aspect of direct coupling, winding asymmetry and transient secondary current. Furthermore, based on the winding theory for short primary linear machines, the machine parameters are established qualitatively considering pulsating magnetic field of NLS-LDFM. Finally, the NLS-LDFM performance analysis is supplemented by the finite element algorithm(FEA) simulation and experiments under different operating conditions.

关键词： Linear doubly-fed machine(LDFM) End effect Parameter analysis Finite element algorithm(FEA)

来源：评论

学校读者我要写书评

暂无评论

A Symmetrical-Structure Fault Current Limiter for Bipolar DC Distribution Networks

A Symmetrical-Structure Fault Current Limiter for Bipolar DC...

引用

PELS Students and Young Professionals Symposium (SYPS), IEEE

作者： Yangfan Chen Yu Zhang School of Electrical and Electronic Energering State Key of Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

In a bipolar DC distribution network, both the pole-to-ground fault (PGF) and the pole-to-pole fault (PPF) would threaten its security and stability. This paper proposes a symmetrical-structure fault current limiter (SSFCL) topology, which can help achieve fault riding through (FRT) of PGF and PPF in a bipolar DC distribution network. With the SSFCL, the rising speed of the fault current can be limited, thus ensuring the safety of the DC transformers (DCTs). Then the fault current can be hysteresis controlled within a required range, which provides an adequate fault criterion to locate the faulty load branch. The discharging path of the SSFCL can create a fault current zero point, enabling the solid-state switches to achieve zero-current switching (ZCS) when cleaning the faulty branch. In addition, with the SSFCL, the terminal voltages of the DCTs would not decay during the FRT process, which ensures the fast restoration of the power supply after the fault has been cleaned. The effectiveness of the SSFCL is verified on a ± 375 V bipolar DC experimental prototype. The SSFCL presented in this article provides a solution for the DC fault in a bipolar DC distribution network.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Inhomogeneous strain and doping of transferred CVD-grown graphene

引用

Rare Metals 2022年第5期41卷 1727-1734页

作者： Yu-Ting Niu Fang-Zhu Qing Xue-Song Li Bo Peng National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of ChinaChengdu 611731China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of ChinaChengdu 611731China School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110China

Chemical vapor deposition(CVD)-grown graphene on copper foils is subject to the Cu substrate, which affects the spatial distribution of strain and doping, thus influencing the electronic properties of graphene. However, plenty of electronic devices based on CVD-grown graphene require transfer process and the distribution of doping and strain in CVD-grown graphene transferred onto the insulating substrates remains elusive.

关键词： graphene transferred strain

来源：评论

学校读者我要写书评

暂无评论

Influence of Grounded Shield on Cable Broadband Impedance Spectroscopy Measurement

Influence of Grounded Shield on Cable Broadband Impedance Sp...

引用

Electrical engineering, Control and Robotics (EECR), International Conference on

作者： Xuebin Ye Dandan Zhang Shi Mo State Key Laboratory of Advanced Electromagnetic Engineering and Technology Key Laboratory of Pulsed Power Technology Ministry of Education School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

Fast and accurate cable fault detection is the key to reduce economic losses and improve electrical system reliability. Broadband impedance spectroscopy (BIS) is a new type of cable fault location technology, but the application of BIS technology in the actual field is still less. In particular, the grounding of cable shield in actual operation is lack of consideration is one of the reasons. In view of the grounding situation which widely occurs in the actual cable, this paper analyzes the influence of the cable shield grounding on the measuring circuit, and carries out the measurement experiments of different grounding conditions under the open and short circuit faults at the terminal of the cable. The results show that the grounding of the cable shield does not affect the accuracy of the BIS data. This simplifies the operation and reduces the risk of electric shock during the measurement, which has positive significance for the application of BIS technology in practice.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：