Results 21 to 30 of about 11,988 (165)
水电水利, 2019 最近几年,我国电力行业的发展速度不断加快,变压器制造是电力整体运行以及发展的关键,我国的变压器制造水平也正在不断提升。通过调查分析之后发现,变压器的制造过程中绝缘电阻偏低的情况还时有出现,基于此,本文对变压器制造中绝缘电阻偏低原因以及对策进行了探讨分析,并且给出了笔者自己的看法。
云龙 冯
semanticscholar +1 more source
Rare Metals, EarlyView.ABSTRACT Photodetectors, based on GaAs nanowires (NWs), hold significant promise in the fields of high integration micro‐ and nano‐optoelectronics applications because of their outstanding electronic and optical properties. To date, significant efforts have been directed toward enhancing the performance of photodetectors, aiming for high detectivity ...
Yu Hao +11 more
wiley +1 more source
Automatic vibration fault detection of coal mine explosion-proof electrical equipment based on One-Class Support Vector Machine [PDF]
The vibration generated by explosion-proof electrical equipment in coal mines during operation can compromise its mechanical integrity, leading to fastener loosening, component wear, and changes in the structure and vibration modes of the equipment. This
DU Chunhui +3 more
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Rare Metals, EarlyView.ABSTRACT With the continuous advancement of materials science and technology, the rare metal gallium has increasingly emerged as a promising alternative to the toxic metal mercury. Although existing research has predominantly focused on the high electrical conductivity and excellent deformability of liquid metal (LM), its intrinsic fluidic property ...
Feifan Guo +6 more
wiley +1 more source
Research of laser and solar hybrid powered system for Active optical-electronic current transformer [PDF]
, 2011 随着电力工业的不断发展，电网电压等级的不断提高，对电压、电流的测量要求也在不断提高。传统的电磁式互感器无法满足迅速发展的数字化电网电压的测试要求。目前电子式（光电式）互感器已成为电网中高电压、高电流测量新的研究热点，有源式光电电流互感器是新型互感器研究的典型代表，而高压端的供能是有源式光电电流互感器的关键部件之一。目前研究的主要有线圈从母线上取能、高压电容分压式供能、激光供能、蓄电池供能、超声电源供能等供能方法。 本文在光电互感器基本原理理论研究的基础上，对上述各种供能方法进行分析研究，结合激光供能 ...
孙存淼
core
Rare Metals, EarlyView.ABSTRACT CoP has become a research hotspot for supercapacitor electrode materials because of its considerable theoretical capacitance and metalloid nature, but its commercial application remains hampered by structural instability and sluggish ion kinetics.
Gaoliang Wang +8 more
wiley +1 more source
高压功率MOSFET结终端保护技术及其组合优化设计 [PDF]
, 2006 场板与场限环是用来提高功率MOSFET抗电压击穿能力的常用结终端保护技术,文章将分别介绍场板与场限环结终端保护技术各自的特点和耐压敏感参数,通过场板和场限环的互补组合来优化设计一款高耐压的VDMOS器件结构,最后采用ATHENA(工艺模拟)和ATLAS(器件模拟 ...
李开航, 郭东辉, 陈利
core
水电水利, 2019 油浸式电力变压器的绝缘主要通过绝缘材料而实现,是变压器正常作业的基本条件；此外,变压器的使用寿命与绝缘材料的寿命息息相关。电力变压器作为电网构成的昀基本元器件之一,变压器的可靠性对于电网的正常运行有着十分重要的影响。在变压器的绝缘中,尽管国内外都致力于开发无油变压器,但是现今昀主流的变压器多是油浸式电力变压器,其依靠油和纸板来进行变压器绝缘。本文重点探究油浸式电力变压器绝缘故障的判断和处理措施,包括变压器油、渗漏点等处理,以提高油浸式电力变压器的处理效率、质量。
文德 靳
semanticscholar +1 more source
Rare Metals, EarlyView.ABSTRACT Early detection of thermal runaway (TR) is essential for lithium‐ion battery (LIB) safety, as unchecked TR risks catastrophic failures in energy storage systems. Gas‐based sensing offers a faster and more direct approach by detecting decomposition products at the molecular level.
Tianshui Liang +9 more
wiley +1 more source