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一种改进的新型桥式固态限流器的研究

李洪凤,贾贵玺,齐炜,徐伟

《中国工程科学》 2005年第7卷第8期页码 75-79

摘要：

随着电网容量的不断扩大，短路电流限制技术已成为故障保护的一个研究热点。提出的新型桥式电路是在原有桥式拓扑结构上进行了改进，并提出了新的控制策略。详细介绍了新型桥式限流器的基本工作原理及特点，给出了基于Matlab/Simulink软件的仿真分析和基于天津大学动模实验室的实验结果。仿真与实验结果证明了所提出新型拓扑与控制策略的正确性。

关键词：短路限流器新型桥式电路 Matlab/Simulink仿真动模实验

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电力系统中对称和/或不对称故障的限流器阻抗优化新方法 None

Mahmoud MODARESI, Hamid LESANI

《信息与电子工程前沿（英文）》 2018年第19卷第2期页码 297-307 doi: 10.1631/FITEE.1601689

摘要：为给电力网络设计者选择故障限流器（fault current limiters，FCLs）的阻抗类型和阻值，提出一种基于其在网络中的位置计算最佳FCL阻值的新方法。

关键词：故障限流器（FCL）；FCL阻抗；短路电流；故障电流；电力系统

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Eddy current measurement of the thickness of top Cu film of the multilayer interconnects in the integratedcircuit (IC) manufacturing process

Zilian QU,Yonggang MENG,Qian ZHAO

《机械工程前沿（英文）》 2015年第10卷第1期页码 1-6 doi: 10.1007/s11465-015-0325-2

摘要：

This paper proposes a new eddy current method, named equivalent unit method (EUM), for the thickness measurement of the top copper film of multilayer interconnects in the chemical mechanical polishing (CMP) process, which is an important step in the integrated circuit (IC) manufacturing. The influence of the underneath circuit layers on the eddy current is modeled and treated as an equivalent film thickness. By subtracting this equivalent film component, the accuracy of the thickness measurement of the top copper layer with an eddy current sensor is improved and the absolute error is 3 nm for sampler measurement.

关键词： CMP eddy current multilayer wafer Cu interconnects equivalent unit

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Analysis of the double-layer α-Si:H emitter with different doping concentrations for α-Si:H/c-Si heterojunction solar cells

Haibin HUANG,Gangyu TIAN,Tao WANG,Chao GAO,Jiren YUAN,Zhihao YUE,Lang ZHOU

《能源前沿（英文）》 2017年第11卷第1期页码 92-95 doi: 10.1007/s11708-016-0432-8

摘要： Double-layer emitters with different doping concentrations (DLE) have been designed and prepared for amorphous silicon/crystalline silicon (α-Si:H/c-Si) heterojunction solar cells. Compared with the traditional single layer emitter, both the experiment and the simulation (AFORS-HET, http://www.paper.edu.cn/html/releasepaper/2014/04/282/) prove that the double-layer emitter increases the short circuit current of the cells significantly. Based on the quantum efficiency (QE) results and the current-voltage-temperature analysis, the mechanism for the experimental results above has been investigated. The possible reasons for the increased current include the enhancement of the QE in the short wavelength range, the increase of the tunneling probability of the current transport and the decrease of the activation energy of the emitter layers.

关键词： double-layer emitter α-Si:H/c-Si heterojunction solar cell short circuit current quantum efficiency current-voltage-temperature

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Experimental investigation and comparative study of inter-turn short-circuits and unbalanced voltage

Fatima BABAA, Abdelmalek KHEZZAR, Mohamed el kamel OUMAAMAR

《能源前沿（英文）》 2013年第7卷第3期页码 271-278 doi: 10.1007/s11708-013-0258-6

摘要： A transient model for an induction machine with stator winding turn faults on a single phase is derived using reference frame transformation theory. The negative sequence component and the 3rd harmonic are often considered as accurate indicators. However, small unbalance in the supply voltage and/or in the machine structure that exists in any real system engenders the same harmonics components. In this case, it is too difficult to distinguish between the current harmonics due to the supply voltage and those originated by inter-turn short-circuit faults. For that, to have the correct diagnosis and to increase the sensitivity and the reliability of the diagnostic system, it is crucial to provide the relationship between the inter-turn short-circuits in the stator winding and the supply voltage imbalance through an accurate mathematical model and via a series of experimental essays.

关键词： induction machines fault indicator inter-turn short-circuit fault unbalance supply voltage

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基于极限学习机的电动汽车锂离子动力电池外部短路热模型研究 Article

杨瑞鑫, 熊瑞, Weixiang Shen, Xinfan Lin

《工程（英文）》 2021年第7卷第3期页码 395-405 doi: 10.1016/j.eng.2020.08.015

摘要：

锂离子动力电池外部短路（ESC）是电动汽车常见且严重的电气故障之一。为此，本文提出了一种新型电池热模型以准确刻画动力电池外部短路发生后的温度行为。主要工作如下：在不同电池荷电状态和环境温度下，设计并系统地开展了动力电池外部短路实验；为保证模型参数的物理意义和模型的精准性，利用集总参数热模型替换经典极限学习机中的激活函数，构建了基于极限学习机的电池热（ELMT）模型，实现了模型无需迭代调节参数和模型参数就可以具备物理属性的双重优势，极大提高了模型计算效率与准确度；为了评估模型改进的必要性，比较了极限学习机热模型与遗传算法参数化的多集总参数热（MLT）模型。结果表明，ELMT模型相比MLT模型具有更优异的计算效率以及拟合、预测精度。其中，ELMT模型拟合和预测电池温度的均方根误差分别为0.65 ℃和3.95 ℃，MLT模型拟合和预测电池温度的均方根误差分别为3.97 ℃和6.11 ℃。

关键词：电动汽车电池安全外部短路温升预测极限学习机

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苏通大桥短期观测流速在设计基准期内的应用

苏慧,龚维明,梁书亭

《中国工程科学》 2006年第8卷第7期页码 42-46

摘要：

对缺乏长期流速资料的地区，给出了一种通过当地短期流速资料推算设计基准期参考流速的方法；通过分析苏通长江公路大桥水流速度观测的有关内容，采用实测的短期实际流速记录建立流速概率分布模型，按小样本推算极值的办法，得到大桥的设计基准期的基本流速并进行相关分析，确认计算结果的合理性，建立线性回归方程；为确保大桥在动力荷载作用下的安全应用及苏通大桥工程设计、施工提供可靠的技术指导。

关键词：短期观测设计基准期流速相关分析回归方程

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A new and best approach for early detection of rotor and stator faults in induction motors coupled to variable loads

Abderrahim ALLAL,Boukhemis CHETATE

《能源前沿（英文）》 2016年第10卷第2期页码 176-191 doi: 10.1007/s11708-015-0386-2

摘要： Today, induction machines are playing, thanks to their robustness, an important role in world industries. Although they are quite reliable, they have become the target of various types of defects. Thus, for a long time, many research laboratories have been focusing their works on the theme of diagnosis in order to find the most efficient technique to predict a fault in an early stage and to avoid an unplanned stopping in the chain of production and costs ensuing. In this paper, an approach called Park’s vector product approach (PVPA) was proposed which was endowed with a dominant sensitivity in the case in which there would be rotor or stator faults. To show its high sensitivity, it was compared with the classical methods such as motor current signature analysis (MCSA) and techniques studied in recent publications such as motor square current signature analysis (MSCSA), Park’s vector square modulus (PVSM) and Park-Hilbert (P-H) (PVSM ). The proposed technique was based on three main steps. First, the three-phase currents of the induction motor led to a Park’s vector. Secondly, the proposed PVPA was calculated to show the distinguishing spectral signatures of each default and specific frequencies. Finally, simulation and experimental results were presented to confirm the theoretical assumptions.

关键词： induction motor incipient broken bar extended Park’s vector approach spectral analysis inter-turn short-circuit Hilbert transform

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低压断路器和漏电保护电器的可靠性研究

陆俭国

《中国工程科学》 2005年第7卷第6期页码 36-40

摘要：

阐述了低压断路器和漏电保护电器等低压保护类电器可靠性研究的重要性、科学意义及其社会效益，介绍了国际上权威学术机构IEEE在该方面所做工作的概况，指出了开展该方面研究工作的难度与创新意义；重点分析了低压断路器和漏电保护电器的故障模式，在此基础上，在国内外首次提出了其可靠性指标与可靠性验证试验方案，为我国电器行业开展低压保护类电器的可靠性工作提出了理论依据与具体方法。

关键词：故障模式可靠性指标可靠性验证试验方案

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Self-catalytic pyrolysis thermodynamics of waste printed circuit boards with co-existing metals

《环境科学与工程前沿（英文）》 2022年第16卷第11期 doi: 10.1007/s11783-022-1581-0

摘要：

● The co-existing metals in WPCBs has positive catalytic influence in pyrolysis.

关键词： Waste printed circuit board Catalyst Pyrolysis Kinetics

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Yuan-zhang Liu: a Short Biography

Anon

《工程管理前沿（英文）》 2014年第1卷第1期页码 113-114 doi: 10.1530/J-FEM-2014016

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Non-toxic, high selectivity process for the extraction of precious metals from waste printed circuit

《环境科学与工程前沿（英文）》 2023年第17卷第10期 doi: 10.1007/s11783-023-1723-z

摘要：

● Au, Ag and Pd were recovered from WPCBs with high efficiencies.

关键词： Thiosulfate Printed circuit boards Precious metals Leaching Hydrometallurgy

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单边直线感应电机等效电路参数研究

徐伟,孙广生

《中国工程科学》 2008年第10卷第8期页码 76-80

摘要：

单边直线感应电机（SLIM）相对于旋转感应电机（RIM）存在气隙大、边缘效应等，若采用RIM开路和短路试验方法，会给参数测量带来较大误差。文章提出的一种适合SLIM参数测定的新型方案，只需测量电机输入端的总功率、相电压、相电流和频率4个量，即可计算出初级电阻、初级漏感、次级电阻、次级漏感、气隙电感和铁损电阻。电机的特性分析表明，该方法真实有效，具有一定的参考价值。

关键词：单边直线感应电机开路试验短路试验参数测量等效电路

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Shou-rong Zhang: a Short Biography

Anon.

《工程管理前沿（英文）》 2014年第1卷第2期页码 225-226 doi: 10.15302/J-FEM-2014030

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Equivalent circuit and characteristic simulation of a brushless electrically excited synchronous wind

Hao WANG, Fengge ZHANG, Tao GUAN, Siyang YU

《机械工程前沿（英文）》 2017年第12卷第3期页码 420-426 doi: 10.1007/s11465-017-0439-9

摘要：

A brushless electrically excited synchronous generator (BEESG) with a hybrid rotor is a novel electrically excited synchronous generator. The BEESG proposed in this paper is composed of a conventional stator with two different sets of windings with different pole numbers, and a hybrid rotor with powerful coupling capacity. The pole number of the rotor is different from those of the stator windings. Thus, an analysis method different from that applied to conventional generators should be applied to the BEESG. In view of this problem, the equivalent circuit and electromagnetic torque expression of the BEESG are derived on the basis of electromagnetic relation of the proposed generator. The generator is simulated and tested experimentally using the established equivalent circuit model. The experimental and simulation data are then analyzed and compared. Results show the validity of the equivalent circuit model.

关键词： wind power brushless electrically excited synchronous generator hybrid rotor equivalent circuit