公开(公告)号：US20190293742A1

公开(公告)日：2019-09-26

申请号：US16426900

申请日：2019-05-30

申请人： Guildline Instruments Limited

发明人： Richard Timmons ,  Andre Perras ,  Mark Evans ,  Tomasz Barczyk

IPC分类号： G01R35/00 ,  G01R15/04

摘要： Resistor voltage dividers are commonly used to create reference voltages, or to reduce the magnitude of a voltage so it can be measured. Many measurements in test and measurement or calibration applications regularly require accuracies within the sub-part per million (ppm) range, e.g. 0.1 ppm to 1.0 ppm. However, the continued drive for improved accuracy in calibration, standards, and measurements on circuits and components means many measurements and measurement systems are operating at 50 parts per billion (ppb) and below to approximately 10 ppb. At these levels even relatively simple passive elements such as voltage dividers cannot be used without calibration and that these calibrations may be required at frequencies substantially higher than the other elements within the test and measurement equipment. Accordingly, the inventors have established a self-contained voltage divider with internal calibration allowing the voltage divider to be calibrated for every measurement if necessary.

公开(公告)号：US20090085587A1

公开(公告)日：2009-04-02

申请号：US12240191

申请日：2008-09-29

申请人： Andre C. PERRAS ,  Mark EVANS

发明人： Andre C. PERRAS ,  Mark EVANS

IPC分类号： G01R27/14

CPC分类号： G01R27/14

摘要： A resistance testing apparatus makes use of a modular design for cascaded, parallel, bipolar current sources to obviate the need for electromechanical or pneumatic switching systems.

摘要翻译： 电阻测试装置利用串联，并联，双极电流源的模块化设计，以避免对机电或气动开关系统的需要。

公开(公告)号：US10139432B2

公开(公告)日：2018-11-27

申请号：US15220058

申请日：2016-07-26

申请人： Guildline Instruments Limited

发明人： Tomasz Barczyk

IPC分类号： G01R15/18 ,  G01R19/00

摘要： Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for management of AC current measurements in the presence of a DC current. Such current measurement management including at least alarms, feedback, and forward correction techniques exploiting magnetic field measurements from within the magnetic core or upon the surface of magnetic elements and/or shields within the current transducer.

公开(公告)号：US20090278527A1

公开(公告)日：2009-11-12

申请号：US12433931

申请日：2009-05-01

申请人： Andre PERRAS

发明人： Andre PERRAS

IPC分类号： G01R1/20

CPC分类号： G01R1/203

摘要： A more precise and cost effective means than previously commercially available for measuring alternating currents up to 100 amperes in the frequency range from direct current to 100 kilohertz can be measured with precision approaching 0.001% employs a shield around a resistive network. The shield is electrically isolated from the resistive network, but acts as a heat sink to draw heat generated by the resistive network away, promoting fast stabilization times. The shield also provides electrical shielding from outside interference allowing the geometric arrangement of elements in the resistive network to minimize induced inductance and capacitance.

摘要翻译： 可以测量在直流电流到100千赫兹的频率范围内测量高达100安培的交流电流的更精确和成本效益的手段，精度接近0.001％，在电阻网络周围使用屏蔽。 屏蔽层与电阻网络电气隔离，但作为散热器来吸引电阻网络产生的热量，从而促进快速的稳定时间。 屏蔽层还提供电气屏蔽，防止外部干扰，从而使电阻网络中元件的几何排列最小化感应电感和电容。

公开(公告)号：US09069022B2

公开(公告)日：2015-06-30

申请号：US13359980

申请日：2012-01-27

申请人： Andre Perras ,  Mark Evans

发明人： Andre Perras ,  Mark Evans

IPC分类号： G01R27/08 ,  G01R27/14

CPC分类号： G01R27/14

摘要： A resistance testing apparatus makes use of a modular design for cascaded, parallel, bipolar current sources to obviate the need for electromechanical or pneumatic switching systems.

摘要翻译： 电阻测试装置利用用于级联，并联，双极电流源的模块化设计，以避免对机电或气动开关系统的需要。

公开(公告)号：US20120187966A1

公开(公告)日：2012-07-26

申请号：US13359980

申请日：2012-01-27

申请人： Andre Perras ,  Mark Evans

发明人： Andre Perras ,  Mark Evans

IPC分类号： G01R27/08

CPC分类号： G01R27/14

摘要： A resistance testing apparatus makes use of a modular design for cascaded, parallel, bipolar current sources to obviate the need for electromechanical or pneumatic switching systems.

摘要翻译： 电阻测试装置利用用于级联，并联，双极电流源的模块化设计，以避免对机电或气动开关系统的需要。

公开(公告)号：US10078102B2

公开(公告)日：2018-09-18

申请号：US15646207

申请日：2017-07-11

申请人： Guildline Instruments Limited

发明人： Petar Miljanic ,  Tomasz Barczyk

IPC分类号： G01R15/18

CPC分类号： G01R15/185

摘要： Precision AC voltage, current, phase, power and energy measurements and calibrations with current ranges from 1 uA to 20 kA and voltage ranges from 1V to 1000 kV are now performed with accuracies of better than one part per million. Continued demand for improved accuracy has led the inventors to address improvements to dual stage and multi-stage current transducers that may form the basis of the measuring process within many of the measurement instruments providing the precision AC measurements and calibrations. Additionally, the improvements to dual stage and multi-stage current transducers provide for novel feedback controlled precision AC current sources without requiring measurement of the AC current source output directly.

公开(公告)号：US09709612B2

公开(公告)日：2017-07-18

申请号：US15154346

申请日：2016-05-13

申请人： Guildline Instruments Limited

发明人： Tomasz Barczyk ,  Petar Miljanic ,  Iain Page

IPC分类号： H02H3/00 ,  G01R21/133 ,  G01R21/06 ,  G01R19/25

CPC分类号： G01R21/133 ,  G01R19/2513 ,  G01R21/06

摘要： Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for high accuracy voltage, current and power measurements of quasi-stationary and stationary waveforms in single and multiple phase power systems. Precision AC voltage, current, phase, power and energy measurements in power networks may be measured with current ranges from 1 mA to 20 kA and voltage ranges from 1V to 1000 kV and in a frequency range from a few hertz to one hundred kilohertz.

公开(公告)号：US20160252550A1

公开(公告)日：2016-09-01

申请号：US15154346

申请日：2016-05-13

申请人： Guildline Instruments Limited

发明人： Tomasz Barczyk ,  Petar Miljanic ,  Iain Page

IPC分类号： G01R21/133 ,  G01R19/25 ,  G01R21/06

CPC分类号： G01R21/133 ,  G01R19/2513 ,  G01R21/06

摘要： Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for high accuracy voltage, current and power measurements of quasi-stationary and stationary waveforms in single and multiple phase power systems. Precision AC voltage, current, phase, power and energy measurements in power networks may be measured with current ranges from 1 mA to 20 kA and voltage ranges from 1V to 1000 kV and in a frequency range from a few hertz to one hundred kilohertz.

摘要翻译： 电网各个电点的精确测量变得越来越重要，同时由于几个大型发电站和多个相对线性负载的旧配电模式被替换，同时变得越来越困难 通过一个更新的模型，其中包含许多较小的，在某种程度上不可预测的电源，以及许多不总是线性的，通常是智能（基本上也是不可预测的）负载。 本发明的实施例提供了在单相和多相电力系统中准静态和稳态波形的高精度电压，电流和功率测量。 电力网络中的精确交流电压，电流，相位，功率和能量测量可以用电流范围从1 mA到20 kA，电压范围从1V到1000 kV，频率范围从几赫兹到一百千赫。

公开(公告)号：US20150108967A1

公开(公告)日：2015-04-23

申请号：US14518602

申请日：2014-10-20

申请人： Guildline Instruments Limited

发明人： Tomasz Barczyk

IPC分类号： G01R35/00 ,  G01R19/00

CPC分类号： G01R15/183 ,  G01R15/185 ,  G01R19/0092

摘要： Accurate measurements of electrical power at various points of a power grid is becoming more important and, at the same time, is getting more difficult as the old power distribution model of a few, large power generating stations and a multitude of relatively linear loads is replaced by a newer model containing a multitude of smaller, and to some degree unpredictable power sources, as well as a multitude of not always linear and often smart (essentially also unpredictable) loads. Embodiments of the invention provide for management of AC current measurements in the presence of a DC current. Such current measurement management including at least alarms, feedback, and forward correction techniques exploiting magnetic field measurements from within the magnetic core or upon the surface of magnetic elements and/or shields within the current transducer.

摘要翻译： 电网各个电点的精确测量正在变得越来越重要，同时，由于几个大型发电站和多个相对线性负载的旧配电模型被替换，同时变得越来越困难 通过一个更新的模型，其中包含许多较小的，在某种程度上不可预测的电源，以及许多不总是线性且通常是智能（基本上也是不可预测的）负载。 本发明的实施例提供了在存在DC电流的情况下管理AC电流测量。 这种电流测量管理至少包括利用来自磁芯内的磁场测量或在电流传感器内的磁性元件和/或屏蔽表面上的报警，反馈和正向校正技术。