Characterization of the Magnetic Distortions in Closed-Circuit Magnetic Measurements

闭路磁测量中磁畸变的表征

• 批准号: 0854880
• 负责人: Daniel Kramer
• 金额: --
• 依托单位: University of Dayton
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2011-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0854880&HistoricalAwards=false
• 关键词: Characterization; Magnetic; Distortions; Closed; Circuit

***** Technical Abstract *****This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Distortion of the magnetic hysteresis loop in first and third quadrants in open-circuit measurements was reported by Weiss in 1926 and named ?image effect?. Such distortion was not reported in the closed-circuit measurements developed in 1960s until 2008 by this group, showing the hysteresis distortion to be linked with the saturation magnetization and the geometry of the ferromagnetic specimens. This research will investigate the distortion and develop a fundamental understanding of the interfacial interactions between ferromagnetic materials. Various factors, including the saturation magnetization and geometry of the ferromagnetic specimens and electromagnetic poles, as well as the pressure applied to the specimens, will be analyzed. Both actual measurements and computer software will be used to analyze the interactions between the ferromagnetic materials. This research provides a chance to revisit Weiss?s magnetic theory for new discoveries, which is important for infrastructure enhancement in scientific research and for development of advanced modern technology to accurately identify new magnetic materials for high-performance generators / motors for renewable energy. The project provides an excellent training ground for young scientists; e.g., graduate students and post-docs. ***** Non-Technical Abstract *****This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Both scientists and industry rely on magnetic ?hysteresigraphs? in closed-circuit measurements to characterize permanent magnetic materials, which are considered to be free from errors associated with open-circuit measurements. However, two reports published in 2008 by this research group show that such magnetic hysteresis distortion exist in closed-circuit measurements and is linked to the magnetic strength and geometry of the specimen materials when a magnetic field is applied. The hysteresis distortion complicates identifying and developing new magnetic materials. Only a comprehensive understanding of the phenomenon can help to establish effective correction methods, which is important for infrastructure enhancement in scientific research and for development of advanced modern technology to accurately identify new magnetic materials for high-performance generators / motors for renewable energy. This project will use both magnetic measurements and computer modeling to investigate the magnetic hysteresis distortion and develop fundamental understanding of the phenomenon, and develop new devices for magnetic characterization. The project provides an excellent training ground for young scientists; e.g., graduate students and post-docs.

* 技术摘要 * 该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。韦斯在1926年报告了开路测量中第一和第三象限磁滞回线的失真，并命名为？图像效果？这种失真在20世纪60年代直到2008年由该小组开发的闭路测量中没有报道，显示磁滞失真与铁磁样品的饱和磁化强度和几何形状有关。这项研究将调查的扭曲和发展铁磁材料之间的界面相互作用的基本理解。各种因素，包括饱和磁化强度和铁磁试样和电磁极的几何形状，以及施加到试样上的压力，将进行分析。 实际测量和计算机软件都将用于分析铁磁材料之间的相互作用。这项研究提供了一个重新审视韦斯？这对加强科学研究的基础设施和发展先进的现代技术，以准确地识别用于可再生能源的高性能发电机/电动机的新磁性材料非常重要。该项目为青年科学家提供了一个极好的培训场所;例如，研究生和博士后。* 非技术摘要 * 该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。科学家和工业界都依赖于磁？hysteresigraphs？用于表征永磁材料的闭路测量，被认为没有与开路测量相关的误差。然而，该研究小组在2008年发表的两份报告表明，这种磁滞失真存在于闭路测量中，并且与施加磁场时样品材料的磁场强度和几何形状有关。 磁滞失真使识别和开发新的磁性材料变得复杂。 只有全面了解这一现象，才能帮助建立有效的校正方法，这对于加强科学研究的基础设施和发展先进的现代技术，准确识别用于可再生能源的高性能发电机/电动机的新磁性材料至关重要。该项目将使用磁性测量和计算机建模来研究磁滞失真，并对该现象进行基本理解，并开发用于磁性表征的新设备。该项目为青年科学家提供了一个极好的培训场所;例如，研究生和博士后。