公开(公告)号：US11709211B2

公开(公告)日：2023-07-25

申请号：US17609703

申请日：2021-01-22

申请人： SOUTHEAST UNIVERSITY

发明人： Ming Cheng ,  Zheng Wang ,  Xinkai Zhu ,  Wei Qin

IPC分类号： G01R33/12 ,  G01R21/133

CPC分类号： G01R33/1253 ,  G01R21/1331

摘要： Disclosed is a power calculation method of a magnetic circuit. In view of the power problem of a magnetic circuit and the phase problem of a magnetomotive force (MMF) and a magnetic flux in the magnetic circuit, the present disclosure draws a magnetic circuit vector diagram based on an equivalent magnetic circuit vector model, and provides a method for calculating virtual magnetic active power, virtual magnetic reactive power, and virtual magnetic complex power of the magnetic circuit by analyzing the MMF, the magnetic flux, the reluctance, and the magnetic reactance in the magnetic circuit by using the magnetic circuit vector diagram. A mathematical relationship between the virtual magnetic power of the magnetic circuit and the electric power of the corresponding equivalent electric circuit is derived according to a conversion factor between the virtual magnetic power and the electric power, so that the electric power can be directly calculated according to magnetic parameters such as the MMF and the magnetic flux in the magnetic circuit. The power calculation method of the magnetic circuit provided in the present disclosure can calculate and analyze the virtual magnetic power of the magnetic circuit according to the magnetic circuit vectors, so as to calculate the electric power from the magnetic circuit through conversion. The electric power can be solved according to the magnetic circuit vectors directly when the electric vectors are not available to calculate electric power in electromagnetic components.

公开(公告)号：US20180231602A1

公开(公告)日：2018-08-16

申请号：US15431941

申请日：2017-02-14

申请人： U.S. Army Research Laboratory ATTN: RDRL-LOC-I

发明人： William A. Beck

IPC分类号： G01R31/26 ,  G01R33/12

CPC分类号： G01R31/2648 ,  G01R33/07 ,  G01R33/1253

摘要： A method for determining a two-dimensional spectrum of a specified carrier having a specified mobility and density in a material of an electronic device, the method including performing a magnetic field-dependent Hall measurement on the material of the electronic device; determining, using the magnetic field-dependent Hall measurement, a probability density function of a conductance of the material of the electronic device, wherein the probability density function describes a spectrum of a plurality of m-carriers, wherein the plurality of m-carriers includes the specified carrier having the specified mobility and density; and determining an electrical transport of a plurality of electrons and holes inside the material of the electronic device by observing a variation of the probability density function with any of the specified mobility and density of the specified carrier.

公开(公告)号：US09024370B1

公开(公告)日：2015-05-05

申请号：US13097688

申请日：2011-04-29

申请人： Bruce W. Wessels ,  Steven J. May

发明人： Bruce W. Wessels ,  Steven J. May

IPC分类号： H01L21/02 ,  H01L29/267

CPC分类号： G01R33/1253 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/1284 ,  H01L29/267 ,  H01L43/08 ,  H01L43/10

摘要： Ferromagnetic Group III-V semiconductor/non-magnetic Group III-V semiconductor heterojunctions, with a magnetodiode device, to detect heterojunction magnetoresistance responsive to an applied magnetic field.

摘要翻译： 具有磁电二极管器件的铁磁III-V族半导体/非磁性III-V族半导体异质结，用于检测响应于施加的磁场的异质结磁阻。

公开(公告)号：US20120206143A1

公开(公告)日：2012-08-16

申请号：US13396391

申请日：2012-02-14

申请人： Kevin D. McGushion

发明人： Kevin D. McGushion

IPC分类号： G01R33/44

CPC分类号： G01R33/022 ,  G01R33/028 ,  G01R33/1253

摘要： The present device relates to a sensor capable of detecting changes in the electromagnetic field it generates when in proximity to either conductive or nonconductive materials. This occurs by way of oscillating a transmit coil with an electro motive force at a resonant frequency thus creating an electromagnetic field. The magnetic field passes through a target of either conductive or nonconductive material and is then intercepted by a receive coil which likewise oscillates at a resonant frequency, which when in proximity to the transmit coil and transmit coils resonant frequency produces an enhanced signal by way of the interaction of the respective resonant frequencies and receive coil output.

摘要翻译： 本装置涉及一种能够检测当接近导电材料或非导电材料时产生的电磁场变化的传感器。 这通过以共振频率的电动机振荡发射线圈而发生，从而产生电磁场。 磁场通过导电材料或非导电材料的靶，然后由接收线圈截取，该接收线圈同样以谐振频率振荡，当谐振频率接近发射线圈和发射线圈时，谐振频率通过 各谐振频率和接收线圈输出的相互作用。

公开(公告)号：US06403999B1

公开(公告)日：2002-06-11

申请号：US09864722

申请日：2001-05-23

申请人： Robert O'Handley ,  Yi-Wun Li

发明人： Robert O'Handley ,  Yi-Wun Li

IPC分类号： H01L2676

CPC分类号： G01R33/1253 ,  G11B5/378

摘要： Method and system for estimating a concentration of free electrons with a selected spin polarization in a semiconductor material. A static magnetic field and an electromagnetic field are impressed on the semiconductor, and free electrons are injected (through diffusion or tunneling) into the semiconductor material from a ferromagnetic material. Motion of the injected, spin-polarized electrons, within the semiconductor gives rise to a Hall voltage across the semiconductor. This voltage is measured at one or more spaced apart locations and analyzed to detect presence of, and estimate a concentration of, free electrons with a selected spin at at least one location within the semiconductor. Effects of an imposed stress, temperature, illumination or electromagnetic field on the semiconductor can be determined.

摘要翻译： 用于在半导体材料中用选择的自旋极化来估计自由电子浓度的方法和系统。 在半导体上施加静态磁场和电磁场，并且将自由电子（通过扩散或隧穿）从铁磁材料注入到半导体材料中。 在半导体内的注入的自旋极化电子的运动产生半导体上的霍尔电压。 在一个或多个间隔开的位置处测量该电压，并分析以在半导体内的至少一个位置检测自由电子的存在和估计自由电子的浓度。 可以确定施加的应力，温度，照明或电磁场对半导体的影响。

公开(公告)号：US11965942B2

公开(公告)日：2024-04-23

申请号：US17613847

申请日：2021-01-22

申请人： SOUTHEAST UNIVERSITY

发明人： Ming Cheng ,  Xinkai Zhu ,  Wei Qin ,  Zheng Wang

IPC分类号： G01R33/12

CPC分类号： G01R33/1253

摘要： A measurement apparatus includes an Epstein frame, an alternating power supply, a power analyzer, and an oscilloscope. Electromagnetic coupling modeling on an Epstein frame is performed based on a vector model of a magnetic circuit, where an iron core of the Epstein frame is formed by laminating a silicon steel sheet to be measured, and an excitation coil and a detection coil with the same turns number are wound around the iron core. The measurement process is to first obtain a reference B-H curve that only considers a nonlinear reluctance of the iron core, and then to derive a B-H curve considering an eddy current effect in a magnetic field at any frequency from the reference B-H curve. The method, applicable to a measurement for B-H curves at middle and high frequencies, may obtain much higher accuracy.

公开(公告)号：US20170023501A1

公开(公告)日：2017-01-26

申请号：US15284338

申请日：2016-10-03

申请人： Kevin D. McGushion

发明人： Kevin D. McGushion

IPC分类号： G01N24/08

CPC分类号： G01N24/08 ,  G01N27/72 ,  G01N29/225 ,  G01N29/275 ,  G01R33/022 ,  G01R33/028 ,  G01R33/1253

摘要： The present device relates to a sensor capable of detecting changes in the electromagnetic field it generates when in proximity to either conductive or nonconductive materials. This occurs by way of oscillating a transmit coil with an electro motive force at a resonant frequency thus creating an electromagnetic field. The magnetic field passes through a target of either conductive or nonconductive material and is then intercepted by a receive coil which likewise oscillates at a resonant frequency, which when in proximity to the transmit coil and transmit coils resonant frequency produces an enhanced signal by way of the interaction of the respective resonant frequencies and receive coil output.

摘要翻译： 本装置涉及一种能够检测当接近导电材料或非导电材料时产生的电磁场变化的传感器。 这通过以共振频率的电动机振荡发射线圈而发生，从而产生电磁场。 磁场通过导电材料或非导电材料的靶，然后由接收线圈截取，该接收线圈同样以谐振频率振荡，当谐振频率接近发射线圈和发射线圈时，谐振频率通过 各谐振频率和接收线圈输出的相互作用。

公开(公告)号：US07956608B1

公开(公告)日：2011-06-07

申请号：US11476253

申请日：2006-06-27

申请人： Bruce W. Wessels ,  Steven J. May

发明人： Bruce W. Wessels ,  Steven J. May

IPC分类号： G01R33/02

CPC分类号： G01R33/1253 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/1284 ,  H01L29/267 ,  H01L43/08 ,  H01L43/10

摘要： Methods of use of ferromagnetic Group III-V semiconductor/non-magnetic Group III-V semiconductor heterojunctions, with a magnetodiode device, to detect heterojunction magnetoresistance responsive to an applied magnetic field.

摘要翻译： 使用具有磁二极管装置的铁磁III-V族半导体/非磁性III-V族III族半导体异质结的方法来检测响应于施加的磁场的异质结磁阻。

公开(公告)号：US07417425B2

公开(公告)日：2008-08-26

申请号：US11514883

申请日：2006-09-05

申请人： Takato Machi ,  Noriko Chikumoto ,  Koichi Nakao ,  Hiroshi Fuji ,  Yutaka Kitoh ,  Teruo Izumi ,  Yuh Shiohara

发明人： Takato Machi ,  Noriko Chikumoto ,  Koichi Nakao ,  Hiroshi Fuji ,  Yutaka Kitoh ,  Teruo Izumi ,  Yuh Shiohara

IPC分类号： G01N27/82 ,  G01R33/032

CPC分类号： G01R33/1253 ,  G01R33/1238

摘要： A continuous observation apparatus of magnetic flux distribution in which a long sample containing a superconducting material or magnetic material is transferred to an observation position and magnetic flux is observed sequentially at each of certain areas along a longitudinal direction of the sample is provided. A method of continuously observing magnetic flux by which a long sample containing a superconducting material or magnetic material is transferred to an observation position and magnetic flux is observed sequentially at each of certain areas along a longitudinal direction of the sample is also provided.

摘要翻译： 提供了一种磁通量分布的连续观察装置，其中将包含超导材料或磁性材料的长样品转移到观察位置，并且沿着样品的纵向方向上的每个特定区域依次观察磁通量。 还提供了连续观察磁通量的方法，其中将含有超导材料或磁性材料的长样品转移到观察位置，并且沿着样品的纵向方向上的每个特定区域依次观察磁通量。

公开(公告)号：US20020175679A1

公开(公告)日：2002-11-28

申请号：US09996083

申请日：2001-11-28

发明人： Hoon Kim ,  Yasushi Nagamune ,  Geun-Taek Lee ,  Suk-Hwan Chung

IPC分类号： G01N027/72 ,  G01R033/12

CPC分类号： G01R33/1253

摘要： Disclosed are apparatus and method for measuring Hall effect related-values in a semiconductor, such as a mobility, a carrier concentration and a resistivity using a Hall effect. A sample is loaded into an IC socket or a similar target, which is fixed on the inside of a heat insulating material container capable of containing injected liquid nitrogen. The Hall effect related-values are measured using a moving member for moving a pair of permanent magnets to an outside of the heat insulating material container. The measuring equipment has a simple structure, and a measuring operation is simple. A level of an input voltage of a sample is measured depending on a constant current that is supplied by a constant current supplying unit contained in a Hall voltage measurement unit. A measurement error detection unit detects and displays a measurement error of the sample using the level of the measured input voltage. Since the measurement error is detected before measuring the Hall effect, the measurement error can be excluded.

摘要翻译： 公开了使用霍尔效应来测量半导体中的霍尔效应相关值的装置和方法，例如迁移率，载流子浓度和电阻率。 将样品加载到IC插座或类似的目标物中，固定在能够容纳注入的液氮的绝热材料容器的内部。 使用用于将一对永磁体移动到绝热材料容器的外部的移动构件来测量霍尔效应相关值。 测量设备结构简单，测量操作简单。 取决于由包含在霍尔电压测量单元中的恒定电流供给单元提供的恒定电流来测量样本的输入电压的电平。 测量误差检测单元使用测量的输入电压的电平检测并显示样品的测量误差。 由于在测量霍尔效应之前检测到测量误差，因此可以排除测量误差。