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基于Clarke矢量模变换的双馈式感应发电机转子匝间短路故障频谱特性的仿真分析 被引量:2
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作者 李俊卿 沈亮印 康文强 《电机与控制应用》 北大核心 2016年第5期64-68,共5页
Clarke变换是交流电机分析计算时的一种常用的坐标变换。通过该变换,可以得到三相交流绕组电流、两相交流绕组电流之间的等效关系。在此基础上,提出了一种基于Clarke矢量模变换的双馈式感应发电机转子匝间短路故障检测方法。根据多回路... Clarke变换是交流电机分析计算时的一种常用的坐标变换。通过该变换,可以得到三相交流绕组电流、两相交流绕组电流之间的等效关系。在此基础上,提出了一种基于Clarke矢量模变换的双馈式感应发电机转子匝间短路故障检测方法。根据多回路理论,在MATLAB中编写M函数建立起双馈电机的数学模型,对转子绕组匝间短路故障进行了仿真,并对仿真结果的频谱特性进行了分析。仿真结果表明,在低转差的情况下,与传统的定子电流频谱诊断方法相比,该方法能够避免因转差率太小而引起的故障分量被基波分量淹没的情况,有效提高了检测的准确性。 展开更多
关键词 clarke矢量模 双馈式感应电机 多回路理论 转子匝间短路故障 频谱特性
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New Interpretation of Newton’s Law of Universal Gravitation
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作者 Dalgerti L. Milanese 《Journal of High Energy Physics, Gravitation and Cosmology》 2017年第4期600-623,共24页
Elliptical motions of orbital bodies are treated here using Fourier series, Fortescue sequence components and Clarke’s instantaneous space vectors, quantities largely employed on electrical power systems analyses. Us... Elliptical motions of orbital bodies are treated here using Fourier series, Fortescue sequence components and Clarke’s instantaneous space vectors, quantities largely employed on electrical power systems analyses. Using this methodology, which evidences the analogy between orbital systems and autonomous second-order electrical systems, a new theory is presented in this article, in which it is demonstrated that Newton’s gravitational fields can also be treated as a composition of Hook’s elastic type fields, using the superposition principle. In fact, there is an identity between the equations of both laws. Furthermore, an energy analysis is conducted, and new concepts of power are introduced, which can help a better understanding of the physical mechanism of these quantities on both mechanical and electrical systems. The author believes that, as a practical consequence, elastic type gravitational fields can be artificially produced with modern engineering technologies, leading to possible satellites navigation techniques, with less dependency of external sources of energy and, even, new forms of energy sources for general purposes. This reinterpretation of orbital mechanics may also be complementary to conventional study, with implications for other theories such as relativistic, quantum, string theory and others. 展开更多
关键词 ORBITAL MOTIONs Gravity Newton’s second Law Hook’s Elastic FORCEs Fourier Electrical Circuits TRANsFORMATIONs of Fortescue and clarke Instantaneous space vectors Instantaneous Complex Power
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集值向量优化的二阶最优性条件(英文) 被引量:1
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作者 盛宝怀 刘三阳 《应用泛函分析学报》 CSCD 2000年第2期97-104,共8页
对集值映射引入了高阶 Clarke导数 ,给出了判别集值向量优化所有效性的二阶 Kuhn-Tucker条件 ,并且 ,借助于集值映射的强 (弱 )伪凸性给出了一个弱有效解的充分条件 .
关键词 KUHN-TUCKER条件 集值向量优化 clarke导数 二阶最优性条件
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