检索结果-内蒙古大学图书馆

Divertor heat flux challenge and mitigation in the EHL-2 spherical torus

Plasma Science and technology 2025年第2期27卷 97-109页

作者： Fuqiong WANG Xiang GU Jiankun HUA Yumin WANG Xiaokun BO Bo CHEN Yuejiang SHI Shuai XU Erhui WANG Yunfeng LIANG the EHL-2 Team College of Physics Donghua UniversityShanghai 201620People’s Republic of China Hebei Key Laboratory of Compact Fusion Langfang 065001People’s Republic of China ENN Science and Technology Development Co. Ltd.Langfang 065001People’s Republic of China International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics State Key Laboratory of Advanced Electromagnetic Engineering and TechnologySchool of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China Forschungszentrum Jülich GmbH Institute of Fusion Energy and Nuclear Waste Management-Plasma PhysicsJülich 52425Germany

The divertor design is critical to heat load handling and thus to achievements of highperformance plasma operations in the EHL-2(ENN He-Long 2)*** paper presents the design of an X-point target(XPT)divertor,featuring a conventional inner divertor and an XPT outer divertor,aimed at the effective control of heat loads,which may be extremely high during high ion temperature *** divertor target plates are made from carbon-based materials,which can handle heat loads of up to 5 MW/m².Divertor performances,including the heat load controllability,the onset of detachment and the in-out/up-down asymmetry,etc.,are evaluated using both the simple particle-tracking strategy and the complicated SOLPS-ITER *** attention is paid to the drift effects on particle/heat transport in the divertor/scrape-off layer region and on the divertor heat loads,focusing on the semi-detached/detached operation *** from SOLPS-ITER simulations demonstrated that the currently designed magnetic equilibrium and divertor configuration can effectively handle the power heat load in EHL-2.

关键词： heat flux divertor EHL-2

来源：评论

学校读者我要写书评

暂无评论

Fluorinated Electrolyte-Assisted Dry Nano LLZO Composite Solid-state Electrolytes for Lithium-Metal Batteries 3

Fluorinated Electrolyte-Assisted Dry Nano LLZO Composite Sol...

引用

2024 3rd International Youth Scientist Forum - Academic Symposium on New Energy and New Material, IYSF-NENM 2024

作者： Han, Qigao Wang, Fuhe Wang, Fengqian Ji, Shuaijing Zhong, Jun Du, Jinqiao Tian, Jie Zhang, Weixin Tang, Shun Cao, Yuancheng Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430074 China Shenzhen Power Supply Co. Ltd. Shenzhen518001 China

Li7La3Zr2O12 composite solid-state electrolytes (LLZO CSSEs) face severe application challenges due to the effect of grain boundary impedance. For this reason, the ionic conduction blocking effect caused by the polymer is mitigated by a dry process while reducing the polymer content. When paired with the designed fluorinated electrolyte, the ionic conductivity of the LLZO CSSEs reach 1.52 mS cm-1, exhibiting a significant ionic conduction synergistic effect. The wide electrochemical stabilization window and better flame retardancy can guarantee the stable application of LLZO CSSEs in lithium-metal batteries, and the lithium symmetric batteries can be stably cycled more than 1000 hours under the current density of 1 mA cm-2. The Li|LiNi0.8Co0.1Mn0.1O2 solid-state batteries achieved a better rate performance with the specific capacity of 128.50 mAh g-1 under the current of 5 C. These results indicate that LLZO CCSEs have the potential for further applications and are contributed to the development of lithium-metal batteries. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Solid-state Batteries

来源：评论

学校读者我要写书评

暂无评论

Study on Double Feedforward Control Strategy for Three-Level Buck-Boost Bi-Directional Converter Applied in Energy-Storage Inverters 11th

Study on Double Feedforward Control Strategy for Three-Level...

引用

11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

作者： Zhou, Chijun Fang, Yu Chen, Jie Li, Rui Shu, Kaixin Wang, Xuehua College of Information Engineering Yang Zhou University Yang Zhou China College of Electrical Energy and Power Engineering Yang Zhou University Yang Zhou China The State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9789819788156

This paper focuses on the three-level Buck-Boost Bi-directional converter (TL Buck-Boost BDC) applied in energy-storage inverters serving as charging or discharging circuit for storage battery. Based on the traditional dual closed-loop control method, a dual feedforward control strategy based on the balanced duty cycle signal at the midpoint of the direct current bus (DC Bus) and the battery voltage duty cycle signal is proposed. The balanced duty cycle signal at the midpoint of the DC Bus is generated by the balanced feedforward generator, and the battery voltage duty cycle signal is generated by the battery voltage feedforward generator. These two duty cycle signals are superimposed with the duty cycle signal generated by the dual closed-loop control to construct the duty cycle signal used to control the switching on or off of the switches in the TL Buck-Boost BDC, thereby achieving stable control of the charging or discharging operation in the energy-storage inverter while ensuring the DC-Bus voltage, Realized DC-Bus midpoint balance and improving the dynamic response speed of the system. The control parameters of the TL Buck-Boost BDC is designed, and the correctness and reliability of the method studied in this paper is verified by experimental results. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Buck converter

来源：评论

学校读者我要写书评

暂无评论

Inherent Switching Reallocated CPS-PWM with Improved Voltage Balancing for MMC

引用

IEEE Transactions on Power Electronics 2025年

作者： Peng, Li Ying, Yuxuan Wang, Zhen Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic Engineering Wuhan430074 China

Modular multilevel converter is an attractive solution in medium or high voltage applications, and voltage balancing is one of the most significant technical problems especially for CPS-PWM based MMCs. To solve this problem, in this paper, an inherent switching reallocated CPS-PWM is proposed for MMC. Based on arm current directions, switching states of sub-modules (SMs), voltage sorting and carrier sorting results, proposed method divides SMs and carriers into inserting and bypassing groups for each, enabling switching reallocation within these four co-optimized groups to inherently balance capacitor voltages. This effectively prevents additional switchings. Besides, most computations of the proposed CPS-PWM are logical operations implemented in FPGA, so proposed method can achieve reallocation frequency equal to sampling frequency. Unlike other CPS-PWM based methods for voltage balancing, the inherent switching reallocated CPS-PWM not only has superior converge speed in dynamic processes which accommodate a wide power range, but also has excellent balancing accuracy especially considering capacitance differences. Owing to appropriate reallocation principles, the proposed CPS-PWM has lower switching loss compared to existing carrier reallocation methods. Finally, the feasibility and superiority of the proposed method are validated by simulation and experiment results. © 1986-2012 IEEE.

关键词： Compressed sensing

来源：评论

学校读者我要写书评

暂无评论

Coordinated Control Strategy for Multi Hybrid Active Power Filters

Coordinated Control Strategy for Multi Hybrid Active Power F...

引用

2025 International Conference on Electrical Automation and Artificial Intelligence, ICEAAI 2025

作者： Wang, Chen Yang, Bo Wu, Yutong Li, Mingshu Li, Xingyang Yin, Jingyuan State Grid Beijing Electric Power Company Beijing China Institute of Electrical Engineering Chinese Academy of Sciences Beijing China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Jinan China

ISBN: (纸本)9798331506797

With the development of new power systems and power electronics technology, the power system in the 'double high' scenario faces certain challenges in harmonic control. To achieve precise real-time control of harmonics, this article proposes a collaborative control strategy for multi hybrid active power filters (HAPF). Based on Silicon Carbide Metal-Oxide-Semiconductor Field-Effect Transistor (SiC-MOSFET) novel power components, a modular HAPF was constructed, the active and passive parts were connected through coupling inductance to output effective compensation current. To achieve real-time and accurate detection of harmonics, an adaptive filter is constructed by combining Least Mean Square (LMS) and Least Mean Squared (LMF) method, and adaptively update the weight step size based on the error results. A coupling evaluation index was constructed by introducing the relative gain matrix (RGA), considering the compensation performance, capacity allocation, and coupling effects of each HAPF, the optimal allocation of compensation current for each device is determined. The simulation results showed that the proposed method can accurately detect and compensate for system harmonics through collaborative control of multiple HAPF, thereby improving the power quality of the power system. © 2025 IEEE.

关键词： Adaptive harmonic detection Cooperative Control HAPF Harmonic compensation RGA

来源：评论

学校读者我要写书评

暂无评论

Thermal Balance-Based Evaluation Method for Safe Operating Areas and Its Degradation of IGBT Power Module

引用

IEEE Journal of Emerging and Selected Topics in Power Electronics 2025年

作者： Han, Tongyao Luo, Yifei Liu, Binli Yuan, Hao Shi, Zenan Naval University of Engineering National Key Laboratory of Electromagnetic Energy China Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430033 China State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an710049 China

Insulated gate bipolar transistors (IGBTs) power module experience significant thermal stress during short-time overload conditions, and their electro-thermal characteristics exhibit strong nonlinearities. As a result, the two-dimensional safe operating area (SOA) provided in the datasheet is unable to meet the need of device reliability assessments. In this paper, we propose a quantitative assessment method based on the thermal balance principle to define the SOA for IGBTs and assess its degradation. A three-dimensional SOA that incorporates voltage, current, and junction temperature is established to prevent IGBT from thermal failures. The proposed SOA indicates that IGBT can operate safely at more than twice the rated current, and the junction temperature can exceed 448.15K(175° C) without thermal failures. This work provides theoretical support for IGBT application design and reliability assessment. According to the physical mechanisms associated with thermal failures of IGBT power module, a criterion to characterize the thermal instability of devices is established. Further, the net heat flux analysis model that integrates semiconductor physics with heat conduction theory is established, enabling the formulation of the three-dimensional SOA of IGBT. Moreover, the effects of the degradation of electro-thermal characteristics on the SOA throughout the long-term operation of the device is considered. In addition, an electro-thermal coupling model that simulates the electro-thermal characteristics of the device is established. The results from both simulation and experiment demonstrate that the established SOA and its degradation effectively predict the reliability of the IGBT under short-time overload conditions. © 2013 IEEE.

关键词： Insulated gate bipolar transistors (IGBT)

来源：评论

学校读者我要写书评

暂无评论

electromagnetic Functions Modulation of Recycled By-Products by Heterodimensional Structure

引用

Nano-Micro Letters 2025年第6期17卷 264-278页

作者： Ze Nan Wei Wei Zhenhua Lin Ruimei Yuan Miao Zhang Jincheng Zhang Jianyong Ouyang Jingjing Chang Hejun Li Yue Hao State Key Laboratory of Wide-Bandgap Semiconductor Devices and Integrated Technology School of MicroelectronicsXidian UniversityXi’an 710071People’s Republic of China State Key Laboratory of Solidification Processing Shaanxi Province Key Laboratory of Fiber Reinforced Light Composite MaterialsCarbon/Carbon Composites Research CenterNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China Advanced Interdisciplinary Research Center for Flexible Electronics Xidian UniversityXi’an 710071People’s Republic of China Department of Materials Science and Engineering National University of Singapore7 Engineering Drive 1Singapore 117574Singapore

One of the significant technological challenges in safeguarding electronic devices pertains to the modulation of electromagnetic(EM)wave jamming and the recycling of defensive *** synergistic effect of heterodimensional materials can effectively enable the manipulation of EM waves by altering the *** we propose a novel approach for upcycling by-products of silver nanowires that can fabricate shape-tunable aerogels which enable the modulation of its interaction with microwaves by heterodimensional structure of ***-product heterodimensionality was used to design EM-wave-jamming-dissipation structures and therefore two typical tunable aerogel forms were *** first tunable form was aerogel film,which shielded EM interference(EMI shielding effectiveness(EMI SE)>89 dB)and the second tunable form was foam,which performed dual EM functions(SE>30 dB&reflective loss(RL)<-35 dB,effective absorption bandwidth(EAB)>6.7 GHz).We show that secondary recycled aerogels retain nearly all of their EM protection properties,making this type of closed-loop cycle an appealing *** findings pave the way for the development of adaptive EM functions with nanoscale regulation in a green and closed-loop cycle,and they shed light on the fundamental understanding of microwave interactions with heterodimensional structures.

关键词： Silver nanowires electromagnetic shielding Microwave absorption Recycled aerogels

来源：评论

学校读者我要写书评

暂无评论

Enhancing the TRIP Effect by Pre-Ferrite in the Hot Rolled Fe-8Mn-4Ni-3Al-0.1C Steel

引用

ISIJ International 2025年第4期65卷 571-575页

作者： Zhang, Linfeng Matsugi, Kazuhiro Xu, Zhefeng Choi, Yongbum Graduate School of Advanced Science and Engineering Hiroshima University 1-4-1 Kagamiyama Higashi-Hiroshima739-8527 Japan State Key Laboratory of Metastable Materials Science and Technology Yanshan University No. 438 Hebei Street Qin Huangdao066-000 China

As is well known, reconstruction of the initial microstructure before an inter-critical annealing (IA) can optimize the final microstructure as well as improve mechanical performance. In this study, the initial microstructure with "pre-ferrite + martensite" was designed via two-stage cooling in the rolling process. The final microstructure observation showed that bimodal size distributed austenite and double morphologies of austenite. Moreover, lath-shaped austenite existed in the martensitic matrix;blocky austenite occurred at the boundaries of pre-ferrite. According to the numerical simulations of the IA process, blocky austenite tended to be more stable with smaller size and higher Mn concentrations than lath-shaped austenite. The characteristics of austenite were similar at different IA temperatures, but the lower IA temperatures, the smaller size of austenite. An excellent combination of strength (1 308 MPa) and ductility (34%) was obtained at 928 K, which was ascribed to a positive TRIP effect induced by the austenite with a large stability gradient. © 2025 The Iron and Steel Institute of Japan.

关键词： Ductility

来源：评论

学校读者我要写书评

暂无评论

MIDC system voltage support capability evaluation index with renewable energy sources

MIDC system voltage support capability evaluation index with...

引用

2024 International Conference on Energy technology and Electrical Power, ETEP 2024

作者： Huang, Qiyuan Wu, Jinbo State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China State Grid Hunan Electric Power Co. Ltd. Power Research Institute China

ISBN: (纸本)9781510690400

Renewable energy sources (RES) connected to the receiving end of the multi-infeed HVDC (MIDC) system will affect the node voltage support capability, which in turn affects the voltage stability of the power grid. To reasonably evaluate the voltage support capability of RES integrated MIDC systems, firstly, the structural characteristics of the MIDC system and the amplitude and phase characteristics of different types of RES are analyzed. Secondly, based on the traditional short circuit ratio index combined with the RES amplitude and phase characteristics, the multi-infeed transient short circuit ratio (MITSCR) is defined, and the method of analyzing the voltage support capability of MIDC system is proposed. Finally, time-domain simulation analysis is carried out using PSACD/EMTDC, and the results show that the MITSCR can effectively characterize the node voltage support capability. © 2025 SPIE.

关键词： MIDC system renewable energy sources short circuit ratio voltage support ability

来源：评论

学校读者我要写书评

暂无评论

Visible-light optical phased array on a thin-film lithium niobate platform for high-speed beam steering

引用

Optics Letters 2025年第9期50卷 3090-3093页

作者： Ye, Yongqi Lian, Daixin Chen, Zhansheng Dong, Yantao Bai, Gang Li, Bei Song, Yiwei Zhao, Shi Wu, Jiachen Chen, Jingye Dai, Daoxin Shi, Yaocheng State Key Laboratory for Extreme Photonics and Instrumentation Center for Optical and Electromagnetic Research International Research Center for Advanced Photonics College of Optical Science and Engineering Zhejiang University Hangzhou310058 China Shanghai Academy of Spaceflight Technology Research Shanghai201100 China Shanghai Radio Equipment Research Institute Shanghai201100 China

We demonstrate a visible-light optical phased array (OPA) realized on a thin-film lithium niobate (TFLN) platform. The OPA chip integrates 32 channels and independently modulates the phase of each channel through an electro-optic phase shifter for the first time, to our knowledge, exhibiting a rapid response speed. The electro-optic rising edge response time is 12 ns, while the falling edge response time is 14 ns. Additionally, a combination of non-periodic arrays and a slab grating is employed to suppress the grating lobes of far-field beams, thereby achieving a large field of view (FOV) and a small beam divergence. A 32-channel OPA has been demonstrated, showing a FOV of 40° and a beam divergence of 0.41° in the phase tuning direction at 633 nm. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Beam steering Free space optics Lithium niobate Phase modulation Phased arrays Scanning electron microscopy

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：