检索结果-内蒙古大学图书馆

2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Ueda, Takumi Sano, Kenichiro Terazono, daisuke Nada, Kaho Institute of Science Tokyo Department of Electrical and Electronic Engineering Tokyo Japan Mitsubishi Electric Advanced Technology R&d Center Hyogo Japan

ISBN: (纸本)9798350376067

This paper focuses on the stability of a current-controlled inverter (GFL type) with df/dt-type virtual inertia control. The authors analyze the dynamic characteristics compared to those of synchronous generators and demonstrate the existence of a second-order delay between the electrical frequency and the rotor's rotational frequency in synchronous generators. Then, this second-order delay is implemented into the df/dt-type virtual inertia control as a second-order low-pass filter (LPF), and the influence of the LPF is investigated by EMT simulation. © 2024 IEEE.

关键词： Synchronous generators

来源：评论

学校读者我要写书评

暂无评论

Novel Temporary Bonding/debonding System Enabling advanced Packaging Process 22

Novel Temporary Bonding/Debonding System Enabling Advanced P...

引用

22nd International Conference on Electronics Packaging, ICEP 2023

作者： Miyazawa, Emi Enomoto, Tetsuya Akasu, Yuta Sobue, Shogo Nakamura, Yuki Ogawa, Saeko Kawamori, Takashi Institute for Advanced Integrated Technology Resonac Corporation Packaging Materials Group High Performance Materials Department Electronics R&D Center Electronics Business Headquarters Resonac Corporation Film R&D Group Packaging Materials R&D Department Institute for Advanced Integrated Technology Resonac Corporation Bonding Materials Group High Performance Materials Department

ISBN: (纸本)9784991191152

Novel temporary bonding/debonding system including high heat resistant temporary bonding adhesive and debonding methods with newly developed photonic release by Xe flash light irradiation will be introduced. New temporary bonding adhesive is endurable up to 300 °C and can be easily removed by peeling off after debonding from the support carrier. By adopting the dual layer structure with adhesive layer and metal layer on glass carrier, one-shot Xe flash light irradiation within 5 ms enables debonding cleanly, indicating the increased throughput at debonding step. Process demonstration results of wafer thinning down to 50 μm, fan-out wafer level packaging (FOWLP) will also be shown. © 2023 Japan Institute of Electronics Packaging.

关键词： debonding

来源：评论

学校读者我要写书评

暂无评论

reduction of Carrier Harmonic Iron Loss of Phase-Shift Windings dual Three-Phase Motors by Phase Current-Shift Control 27

Reduction of Carrier Harmonic Iron Loss of Phase-Shift Windi...

引用

27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Miyama, Yoshihiro Akatsu, Kan Mitsubishi Electric Corporation Advanced Technology R&d Center Amagasaki Japan Yokohama National University Department of Faculty of Engineering Yokohama Japan

ISBN: (纸本)9784886864406

A carrier harmonic iron loss reduction technique for the phase-shift windings dual three-phase motors is proposed in this manuscript. By controlling two three-phase current phase-shifts from 30 degrees to -30 degrees, the voltage phase-shift is controlled from 30 degrees to 19 degrees, and the first and third carrier harmonic iron loss is reduced to a 42.9% maximum. Finite element analysis (FEA) confirms that the carrier harmonic current and carrier harmonic iron loss is reduced related to carrier harmonic impedance. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Iron analysis

来源：评论

学校读者我要写书评

暂无评论

Control Study of Enhanced STATCOM for Supercapacitor Applying Virtual Synchronous Generator Control

Control Study of Enhanced STATCOM for Supercapacitor Applyin...

引用

2024 IEEE Energy Conversion Congress and Exposition, ECCE 2024

作者： Nada, Kaho Fujii, Toshiyuki Sano, Kenichiro Mitsubishi Electric Corporation Advanced Technology R&d Center Hyogo Japan Institute of Science Tokyo Department of Electrical and Electronic Engineering Tokyo Japan

ISBN: (纸本)9798350376067

The enhanced static synchronous compensator (E-STATCOM), which is equipped with a supercapacitor and can output active power, is attracting attention as a compensator that can both suppress grid voltage fluctuations and maintain short-term frequency during transients. The authors propose a virtual inertia control based on current control-type converters. The method can suppress overcurrent and manage the dC voltage of the converter, which are issues with the typical grid forming control employing voltage control-type converters. The proposed control configuration is based on an established current-controlled STATCOM. However, a virtual synchronous generator control can be achieved simply by adding to the dC voltage reference of the conventional STATCOM control. The simulation results show that it is possible to achieve continuous operation for the three-phase line to ground fault, and STATCOM's active and reactive power outputs are possible to suppress system oscillations after the fault is cleared. © 2024 IEEE.

关键词： Synchronous generators

来源：评论

学校读者我要写书评

暂无评论

New Mechanical Solutions for Isolating Severe Losses in High Temperature Wells

New Mechanical Solutions for Isolating Severe Losses in High...

引用

2024 International Petroleum technology Conference, IPTC 2024

作者： Zhan, Guodong david Yao, Yang Guo, Huijuan Aljohar, Abdulwahab Drilling Technology Division EXPEC Advanced Research Center Saudi Aramco Saudi Arabia Drilling Mechanical Department CNPC Engineering Technology R&D Company Limited China

ISBN: (纸本)9781959025184

In recent years, with the development of China's oil and gas exploration to deeper layers, the number of deep & ultra-deep wells has been increasing year by year. The casing layer sequence in the well structure design reaches 6-7 layers, which has tended to the design limit, but the handling ability is still insufficient in the face of sudden complex formations. Complications such as severe loss and different pressure systems in the same formation are encountered during drilling, resulting in early casing, which may not achieve the exploration target in the end. The open hole clad technology based on high performance solid expandable tubular is focus on solving difficult problems that weak and complex formation and severe drilling loses which cannot be effectively plugged or controlled. This paper studies the open hole clad technology based on high performance solid expandable tubular in exploration wells by using the methods of indoor test and field trials. The operation principle and technical characteristics of open hole clad technology are introduced in detail. And the test of expansion tubular performance, expansion cone performance and thread sealing strength were carried out to study the expansion tubular operation process. Then aiming at LZ1 exploration well with complications such as severe loss and different pressure systems in the same formation are encountered during drilling, the open hole clad technology field experiment was carried out, and the clad effect of expansion tubular were analyzed. The research results showed that: (1) the indoor tests of expansion tubular performance, expansion tubular cone performance and thread sealing strength verified the reliability of expandable tubular open hole clad technology which can effectively deal with the severe drilling loses on the safe drilling in exploration wells. (2) LZ-1 exploration wells have successfully created conditions for safe drilling in the target formation of LMX group by using Φ219mm expanda

关键词：

来源：评论

学校读者我要写书评

暂无评论

Magnetic properties and microstructures of multi-component Sm-Co-based films prepared by high-throughput experiments

引用

稀有金属（英文版） 2025年第2期44卷 1284-1293页

作者： Xin-rui Zheng Si-Zhe Liang Zhao-Guo Qiu Yan-Song Gong Hong-Xia Meng Gang Wang Zhi-Gang Zheng Wei-Xing Xia de-Chang Zeng Ping Liu School of Materials Science and Engineering South China University of TechnologyGuangzhou 510640China Zhongshan R&D Center for Materials Surface and Thin Films Technology of the South China University of Technology Gent Materials Surface Technology(Guangdong)Co.Ltd.Zhongshan 528437China Laboratory of Rare-Earth Magnetic Functional Materials Ningbo Institute of Material Technology and EngineeringChinese Academy of SciencesNingbo 315201China Department of Physics University of Texas at ArlingtonArlington TX76019USA

Sm-Co-based films play an irreplaceable role in special applications due to their high curie temperature and magnetocrystalline anisotropic energy,especially in heat-assisted magnetic recording(HAMr),but the complex composition of Sm-Co phase and unclear synergistic coupling mechanisms of multi-elemental doping become the challenges to enhance the *** this work,a novel strategy combining magnetron sputtering and a high-throughput experiment method is applied to solve the above-mentioned ***/Cu co-doping highly increases the remanence while maintaining a coercivity larger than 26 kOe,leading to an enhancement of the magnetic energy product to 18.1 MGOe.X-ray diffraction(Xrd)and high-resolution transmission electron micro-scope(HrTEM)reveals that SmCo5 phase occupies the major fraction,with Co atoms partially substituted by Fe and Cu *** situ Lorentz transmission electron microscopy(LTEM)observations show that the Sm(Co,Cu)5 phase effectively prohibits domain wall motions,leading to an increase of coercivity(Hc).Fe doping increases the low saturation magnetization(Ms)and low remanence(Mr)due to the Fe atom having a higher satu-ration magnetic *** magnetization reversal behaviors are further verified by micromagnetic *** results suggest that Sm-Co-based films prepared via Fe/Cu co-doping could be a promising candidate for high-performed HAMr in the future.

关键词： Magnetron sputtering High-throughput experiments Sm-Co Fe/Cu co-doping Magnetic properties Magnetic domain

来源：评论

学校读者我要写书评

暂无评论

A study of highly activated hydrogen evolution reaction performance in acidic media by 2d heterostructure of N and S doped graphene on MoO_(x)

引用

Carbon Energy 2023年第11期5卷 68-80页

作者： Kubra Aydin Seongwon Woo Vinit Kaluram Kanade Seulgi Choi Chisung Ahn Byungkwon Lim Taesung Kim SKKU Advanced Institute of Nanotechnology(SAINT) Department of Nano Science and TechnologySungkyunkwan UniversitySuwon‐siGyeonggi‐doRepublic of Korea School of Advanced Material Science and Engineering Department of Nano Science and TechnologySungkyunkwan UniversitySuwonGyeonggi‐doRepublic of Korea School of Mechanical Engineering Sungkyunkwan UniversitySuwon‐siGyeonggi‐doRepublic of Korea Heat&Surface Technology R&D Department Korea Institute of Industrial TechnologySiheung‐siGyeonggi‐doRepublic of Korea

Herein,a layer of molybdenum oxide(MoO_(x)),a transition metal oxide(TMO),which has outstanding catalytic properties in combination with a carbonbased thin film,is modified to improve the hydrogen production performance and protect the MoO_(x)in acidic media.A thin film of graphene is transferred onto the MoO_(x)layer,after which the graphene structure is doped with N and S atoms at room temperature using a plasma doping method to modify the electronic structure and intrinsic properties of the *** oxygen functional groups in graphene increase the interfacial interactions and electrical contacts between graphene and MoO_(x).The appearance of surface defects such as oxygen vacancies can result in vacancies in MoO_(x).This improves the electrical conductivity and electrochemically accessible surface *** the number of defects in graphene by adding dopants can significantly affect the chemical reaction at the interfaces and improve the electrochemical *** defects in graphene play a crucial role in the adsorption of H^(+)ions on the graphene surface and their transport to the MoO_(x)layer *** enables MoO_(x)to participate in the reaction with the doped graphene.N^(‐)and S^(‐)doped graphene(NSGr)on MoO_(x)is active in acidic media and performs well in terms of hydrogen *** initial overpotential value of 359 mV for the current density of−10 mA/cm^(2)is lowered to 228 mV after activation.

关键词： heteroatom‐doped graphene hydrogen evolution reactions metal‐free catalysts transition metal oxides van der Waals(vdWs)heterostructures

来源：评论

学校读者我要写书评

暂无评论

development of High Temperature resistant Soft Metal Sealing Components in downhole Tools

Development of High Temperature Resistant Soft Metal Sealing...

引用

2024 International Petroleum technology Conference, IPTC 2024

作者： Guo, Huijuan Li, Jianghao Song, Xiping Guodong, david Zhan Wang, Baodong Drilling Mechanical Department CNPC Engineering Technology R&D Company Limited China State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing China Drilling Technology Division EXPEC Advanced Research Center Saudi Aramco Saudi Arabia

ISBN: (纸本)9781959025184

The sealing components plays the role of sealing and pressure resistance of downhole tools, which is a key component that determines the safe and reliable operation of downhole tools. With the development of oil and gas exploitation towards deep and ultra-deep wells, the performance requirements of sealing components for downhole tools are gradually improved. rubber materials are prone to aging and deterioration in downhole high temperature and corrosive environment, resulting in sealing failure and difficulty in maintaining good sealing for a long time. Soft metal materials have the characteristics of high temperature resistance, high sealing pressure and corrosion resistance. The application of high temperature resistant soft metal materials in petroleum engineering sealing components can better solve the problem of aging failure of rubber sealing components, which is of great significance for ensuring the safety of downhole sealing. Based on the introduction of the application of soft metal materials in petroleum engineering, this paper studies the refining method of copper-based soft metal materials, and determines the formula of soft metal materials with excellent performance by analyzing the microstructure of soft metal materials. Based on the developed soft metal material, the high temperature tensile mechanical properties test, high temperature elastic modulus test were carried out. The feasibility of using copper-based soft metal as sealing element in petroleum engineering was analyzed, and the soft metal sealing element for expansion pipe sealing was designed. The research results show that: (1) Metal material seals have been widely studied at home and abroad, and some products have been maturely applied in the market, with good mechanical properties and sealing performance. (2) By adding Ga, rh, Si and other alloying elements to copper metal, the metal wettability, temperature resistance and elastic properties of the material can be improved, and the seal

关键词：

来源：评论

学校读者我要写书评

暂无评论

Unveiling the roles of initial phase constituents and phase metastability in hydrogen embrittlement of TrIP-assisted VCrCoFeNi medium-entropy alloys

引用

材料科学技术（英文版） 2025年第4期207卷 160-176页

作者： Sang Yoon Song dae Cheol Yang Han-Jin Kim Sang-In Lee Hyeon-Seok do Byeong-Joo Lee Alireza Zargaran Seok Su Sohn Department of Materials Science and Engineering Korea University 02841 SeoulRepublic of Korea Green Energy Materials Research Team Hyundai Motor Company Uiwang R&D Center 16082 UiwangRepublic of Korea Institue of Advanced Technology Development Hyundai Motor Group 13529 SeongnamRepublic of Korea Department of Materials Science and Engineering Pohang University of Science and Technology 37673 PohangRepublic of Korea Graduate Institute of Ferrous & Energy Materials Technology Pohang University of Science and Technology37673 PohangRepublic of Korea

Medium-entropy alloys(MEAs)that exhibit transformation-induced plasticity(TrIP)from face-centered cubic(FCC)to body-centered cubic(BCC)are considered promising for liquid hydrogen environments due to their remarkable cryogenic ***,studies on hydrogen embrittlement(HE)in BCC-TrIP MEAs have not been conducted,although the TrIP effect and consequent BCC martensite usually deteri-orate HE *** these alloys,initial as-quenched martensite alters hydrogen diffusion and trap behavior,and deformation-induced martensitic transformation(dIMT)provides preferred crack propaga-tion sites,which critically affects HE ***,this study aims to investigate the HE behav-ior of BCC-TrIP MEAs by designing four V10Cr10Co30Fe50-xNix(x=0,1,2,and 3 at％)MEAs,adjusting both the initial phase constituent and phase metastability.A decreased Ni content leads to a reduced fraction and mechanical stability of FCC,which in turn increases HE susceptibility,as determined through electro-chemical hydrogen pre-charging and slow-strain rate tests The permeation test and thermal desorption analysis reveal that the hydrogen diffusivity and content are affected by initial BCC fraction,interconnec-tivity of BCC,and refined *** these initial phase constituents differ between the alloys with FCC-and BCC-dominant initial phase,microstructural factors affecting HE are unveiled discretely among these al-loy groups by correlation of hydrogen-induced crack behavior with hydrogen diffusion and trap *** alloys with an FCC-dominant initial phase,the initial BCC fraction and dIMT initiation rate emerge as critical factors,rather than the extent of *** BCC-dominant alloys,the primary contributor is an increase in the initial BCC fraction,rather than the extent or rate of *** unraveled roles of microstructural factors provide insights into designing HE-resistant BCC-TrIP MEAs.

关键词： Medium-entropy alloys(MEAs) Transformation-induced plasticity(TrIP) Hydrogen embrittlement Hydrogen-induced crack Hydrogen diffusion and trapping

来源：评论

学校读者我要写书评

暂无评论

Mixed Eccentricity detection by Identification of Harmonic Order of No-load Line-line Voltages in Multi-three-phase PMSMs 26

Mixed Eccentricity Detection by Identification of Harmonic O...

引用

26th International Conference on Electrical Machines and Systems, ICEMS 2023

作者： Okazaki, Kodai Akatsu, Kan Yang, Kan Mitsubishi Electric Corporation Advanced Technology R&D Center Hyogo Japan Yokohama National University Department of Electrical Engineering Kanagawa Japan

ISBN: (纸本)9798350317589

Permanent magnet synchronous motors (PMSMs) have many advantages such as high efficiency. As they are widely utilized for many applications, requirements of less noise and fewer vibrations increase. For a suppression control to the vibration caused by air-gap imbalances, using multi-three-phase PMSMs are suitable method because they can use common three phase inverters. We must detect the air-gap imbalances including static eccentricity and dynamic eccentricity to the suppression control. This paper proposes a method that separately detects static and dynamic eccentricity considering characteristics of the harmonic components of no-load line-line voltages. The method confirms its detection ability by a finite element analysis (FEA) model with eccentricity. © 2023 IEEE.

关键词： Permanent magnets

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：