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公开(公告)号：US11988689B2
公开(公告)日：2024-05-21
申请号：US17974869
申请日：2022-10-27
发明人： Bruno Boury , Robert Racz , Antonio Cacciato , Jian Chen
CPC分类号： G01R15/148 , H10N52/01 , H10N52/101 , H10N52/80
摘要： A circuit for sensing a current comprises a substrate having a first and a second major surface, the second major surface being opposite to the first major surface. At least one magnetic field sensing element is arranged on the first major surface of the substrate and is suitable for sensing a magnetic field caused by a current flow in a current conductor coupled to the second major surface. The substrate also comprises at least one insulation layer, substantially buried between the first major surface and the second major surface of the substrate.
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公开(公告)号：US20240027510A1
公开(公告)日：2024-01-25
申请号：US18256735
申请日：2021-12-08
发明人： Peter Ayotola ADIGUN
CPC分类号： G01R31/085 , G01R31/088 , G01R15/148
摘要： The invention relates to a fault current detection device for an overhead power line. The fault current detection device is configured to apply a fault detection algorithm which includes a duration test and a return to normal test. The fault current detection device reports a fault current to a remote fault monitoring device only if both tests are passed. The fault monitoring device is configured to apply an alert ranking algorithm to determine which of a plurality of the fault current detection devices is closest to a fault. The alert ranking algorithm includes identifying or establishing a location of an upstream source associated with the fault current detection devices and classifying the fault current detection device which is the furthest downstream from the upstream source as the closest to the fault. A fault current detection method and a fault detection system and method are disclosed.
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公开(公告)号：US11644483B2
公开(公告)日：2023-05-09
申请号：US17449903
申请日：2021-10-04
申请人： RF Code, Inc.
IPC分类号： G01R19/155 , G01R15/14 , G01R29/08
CPC分类号： G01R15/148 , G01R19/155 , G01R29/0878
摘要： A sensor device for detecting voltage in a conductor cable includes a sense electrode to be disposed over a surface of the conductor cable to cover a sense region having a sense axial width and a sense circumferential length and a reference electrode to be disposed over the surface of the conductor cable to cover a reference region. The reference region has an axial position adjacent the axial position of the sense region and has a reference circumferential length greater than the sense circumferential length. The sensor device further includes a charge measurement circuit connected in series between the sense electrode and the reference electrode to measure a charge measurement and circuitry to compare the charge measurement to a threshold to detect a presence of the voltage in the conductor cable.
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公开(公告)号：US20180136260A1
公开(公告)日：2018-05-17
申请号：US15604320
申请日：2017-05-24
申请人： Fluke Corporation
CPC分类号： G01R15/207 , G01R1/22 , G01R15/146 , G01R15/148 , G01R19/00 , G01R19/0092
摘要： Systems and methods provide a non-contact current measurement system which operates to measure alternating current flowing through an insulated wire without requiring galvanic contact with the insulated wire. The measurement system may include a magnetic field sensor that is selectively positionable proximate an insulated wire under test. In operation the magnetic field sensor detects a magnetic field generated by the current flowing in the insulated wire. Using an adjustable clamp assembly, the measurement system provides control over the mechanical positioning of the insulated wire relative to the magnetic field sensor to ensure consistent measurements. The non-contact current measurement system may determine information relating to the physical dimensions (e.g., diameter) of the insulated wire. Using the detected magnetic field, the known mechanical positioning, and the determined information relating to the physical dimensions of the insulated wire, the measurement system accurately determines the magnitude of the current flowing through the insulated wire without galvanic contact.
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公开(公告)号：US20180113161A1
公开(公告)日：2018-04-26
申请号：US15298725
申请日：2016-10-20
IPC分类号： G01R29/08
CPC分类号： G01R15/144 , G01R15/148 , G01R29/0878
摘要： Improved devices, apparatuses, systems, and methods involving the use of field probes with voltage-controlled variable impedance elements and surface-launched acoustic wave devices, including surface acoustic wave (SAW) devices and SAW sensor-tag wireless interface devices to measure voltage and current in current carrying conductors (CCCs) via measurement of the electric fields and magnetic fields around said CCCs are disclosed. The devices, apparatuses, systems, and methods taught in the present invention include a remotely powered line-mounted measurement unit that requires no connection to electrical ground for operation, and that has no internal energy source, no energy harvesting or power conditioning circuitry, no discrete energy storage components, and no radio. The devices, apparatuses, systems, and methods taught in the present invention also provide for determining the phase (leading or lagging) of the current relative to the voltage in AC power systems, and also provide for measurement of temperature of the conductor.
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公开(公告)号：US20170343584A1
公开(公告)日：2017-11-30
申请号：US15674378
申请日：2017-08-10
发明人： Minoru ABE
IPC分类号： G01R15/14
CPC分类号： G01R15/148 , G01R15/205
摘要： Each of three magnetic sensors is positioned on a first virtual line that passes the centers of two magnetic shields in the width direction and is perpendicular to a virtual plane, so a value detected by the magnetic sensor is less likely to be influenced by an external magnetic field. The first virtual line and the center of a conductor intersecting the first virtual line are separated from each other by a certain distance. Therefore, even if a distance from the center of the conductor in the width direction to the magnetic sensor is short, it is possible to improve, on a high-frequency side, frequency characteristics in the detection sensitivity of the magnetic sensor for the frequency of the current under measurement.
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公开(公告)号：US09746497B2
公开(公告)日：2017-08-29
申请号：US13604022
申请日：2012-09-05
申请人： Masahiro Kawase
发明人： Masahiro Kawase
CPC分类号： G01R15/148 , G01R33/02
摘要： When a through hole is formed in a primary conductor, a measurement target current partially becomes a bypass current that flows around the through hole. Only a magnetic field component in the X-axis direction is generated from the current that flows through a portion without the influence of the through hole. However, the bypass current generates a magnetic field component in the Y-axis direction at the tilt portion. A magnetic detection element having a magnetic field detection sensitivity only in the Y-axis direction is installed near the through hole such that the magnetic field detection direction is set in the Y-axis direction, thereby detecting the magnetic field component and measuring the current amount without the influence of a neighboring current.
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公开(公告)号：US20150236493A1
公开(公告)日：2015-08-20
申请号：US14599851
申请日：2015-01-19
发明人： Andy Peczalski
CPC分类号： H02G5/02 , G01R1/02 , G01R15/148 , G01R15/18 , G01R15/207 , H02M7/003 , H02M2001/0009
摘要： A current bus that includes an opening that extends from one side of the current bus to an opposing side of the current bus. The opening changes in size as the opening extends from one side of the current bus to the opposing side of the current bus. The opening may include a first diameter and a second diameter that is different than the first diameter. The opening may include a first thickness at the first diameter of the opening which may be much smaller than a second thickness of the current bus. A high accuracy current measurement of the current bus may require that the magnetic field profile of the current bus within the opening be non-linear (e.g., 3rd order polynomial with the highest value of the 3rd degree coefficient).
摘要翻译： 一种当前总线，其包括从当前总线的一侧延伸到当前总线的相对侧的开口。 当开口从当前总线的一侧延伸到当前总线的相对侧时，开口的尺寸改变。 开口可以包括不同于第一直径的第一直径和第二直径。 开口可以包括在开口的第一直径处的第一厚度，其可以远小于当前总线的第二厚度。 当前总线的高精度电流测量可能要求开口内的当前总线的磁场分布是非线性的（例如，具有最高3度系数的三阶多项式）。
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公开(公告)号：US08604777B2
公开(公告)日：2013-12-10
申请号：US13181926
申请日：2011-07-13
申请人： Michael C. Doogue , Shaun D. Milano
发明人： Michael C. Doogue , Shaun D. Milano
IPC分类号： G01R35/00
CPC分类号： G01R15/148 , G01R15/207 , G01R35/005
摘要： An integrated circuit (IC) current sensor that self-calibrates to adjust its signal gain when employed in a current divider configuration is presented. The current sensor includes an integrated current conductor, a magnetic field transducer, a controllable gain stage and a calibration controller. The integrated current conductor is adapted to receive a portion of a calibration current. The calibration current corresponds to a full scale current. The magnetic field transducer, responsive to the calibration current portion, provides a magnetic field signal having a magnitude proportional to a magnetic field generated by the calibration current portion. The controllable gain stage is configured to amplify the magnetic field signal with an adjustable gain to provide an amplified magnetic field signal. The calibration controller is responsive to a calibration command signal to adjust the adjustable gain of the controllable gain stage to a calibrated gain in order to provide the amplified magnetic field signal at a predetermined voltage level that corresponds to a desired current sensor output signal voltage level if the full scale current were received by the integrated current conductor.
摘要翻译： 提出了一种集成电路（IC）电流传感器，当采用分流器配置时，可自行校准以调整其信号增益。 电流传感器包括集成电流导体，磁场换能器，可控增益级和校准控制器。 集成电流导体适于接收校准电流的一部分。 校准电流对应于满量程电流。 响应于校准电流部分的磁场传感器提供具有与由校准电流部分产生的磁场成比例的幅度的磁场信号。 可控增益级被配置为以可调增益放大磁场信号以提供放大的磁场信号。 校准控制器响应于校准命令信号以将可控增益级的可调增益调整到校准增益，以便将放大的磁场信号提供在与期望的电流传感器输出信号电压电平相对应的预定电压电平，如果 集成电流导体接收到满量程电流。
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10.发明申请公开(公告)号：US20130151187A1
公开(公告)日：2013-06-13
申请号：US13813142
申请日：2011-07-27
CPC分类号： G01R19/0092 , G01R15/148 , G01R27/2611 , G06F11/30
摘要： The present invention describes systems and methods for determining current flow through a current-carrying utility asset. An exemplary embodiment can include measuring a first magnetic induction value at a first location near a targeted current-carrying utility asset and a second magnetic induction value at a second location near the targeted asset where the first location is a known distance from the second location; determining a correlation between a spatial angle and an electrical phase angle between the targeted asset and a second asset where the second asset contributes a first and second error component to the first and second magnetic induction values respectively; estimating error values for the first and second error components using the correlation between the spatial angle and the electrical phase angle; and estimating a current flowing through the targeted asset using the first and second magnetic induction values, the known distance, and the error values.
摘要翻译： 本发明描述了用于确定通过载流效用资产的电流的系统和方法。 示例性实施例可以包括测量在目标载流效用资产附近的第一位置处的第一磁感应值和在目标资产附近的第二位置处的第二磁感应值，其中第一位置是距离第二位置的已知距离; 确定目标资产和第二资产之间的空间角度和电相角之间的相关性，其中第二资产分别对第一和第二磁感应值贡献第一和第二误差分量; 使用空间角和电相角之间的相关性来估计第一和第二误差分量的误差值; 以及使用第一和第二磁感应值，已知距离和误差值估计流过目标资产的电流。
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