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52 条记录 (耗时 0.021 秒)

    Method and apparatus for transformer diagnosis
    22.
    发明授权
    Method and apparatus for transformer diagnosis 有权
    用于变压器诊断的方法和装置

    公开(公告)号：US09322866B2

    公开(公告)日：2016-04-26

    申请号：US13919745

    申请日：2013-06-17

    申请人： ABB Research Ltd.

    发明人： Nilanga Abeywickrama ,  Tord Bengtsson

    IPC分类号： G01R31/02 ,  G01R31/06 ,  G01R29/20 ,  G01R35/02 ,  H02H7/04

    CPC分类号： G01R31/027 ,  G01R29/20 ,  G01R31/06 ,  G01R35/02 ,  H02H7/04

    摘要： A transformer diagnosis apparatus and method which can advantageously be used for on-line diagnosis of a transformer, and by which transformer properties may be monitored and/or determined. The diagnosis method includes collecting, for at least two different transformer loads, measurements of a current being indicative of the transformer load, as well as measurements of at least one further transformer AC signal. The method further includes deriving, from the collected measurements, at least two values of a quantity which depends on a transformer property as well as on transformer load; and determining, from the derived values, a set of coefficient(s) of a relation for how the quantity is expected to vary with transformer load. The method further includes using the determined coefficient(s) in performing a diagnosis of the transformer.

    摘要翻译： 可以有利地用于变压器的在线诊断以及可以监视和/或确定变压器特性的变压器诊断装置和方法。 所述诊断方法包括针对至少两个不同的变压器负载收集指示变压器负载的电流的测量以及至少一个另外的变压器AC信号的测量。 该方法还包括从收集的测量中导出取决于变压器特性以及变压器负载的量的至少两个值; 以及从导出的值确定关于如何预期数量随着变压器负载而变化的关系的一系列系数。 该方法还包括在执行变压器诊断时使用所确定的系数。

    Concurrent transformer test system and method
    23.
    发明授权
    Concurrent transformer test system and method 有权
    并联变压器测试系统及方法

    公开(公告)号：US09128134B2

    公开(公告)日：2015-09-08

    申请号：US13660816

    申请日：2012-10-25

    申请人： AVO Multi-Amp Corporation

    发明人： David Hembree Milner, Jr. ,  John Leonard Shanks ,  Harvey Wayne Veselka, Jr.

    IPC分类号： G01R29/20

    CPC分类号： G01R29/20 ,  G01R31/027 ,  H01H2009/0061

    摘要： A tester for testing a transformer is provided. The tester comprises a primary voltmeter and a plurality of secondary voltmeters. The tester may also comprise an ammeter in series with a voltage source configured to apply voltage to the transformer. The primary voltmeter is configured to measure voltage induced across a primary winding of the transformer, while the secondary voltmeters may simultaneously measure voltage outputs at secondary windings of the transformer. The tester is configured to calculate ratios, saturation curves, and knee points for multiple winding combinations based on the measurements simultaneously obtained by the ammeter and the primary and secondary voltmeters.

    摘要翻译： 提供了一台用于测试变压器的测试仪。 测试仪包括初级电压表和多个次级电压表。 测试器还可以包括与被配置为向变压器施加电压的电压源串联的电流表。 主电压表被配置为测量变压器的初级绕组上感应的电压，而次级电压表可以同时测量变压器次级绕组的电压输出。 测试仪被配置为基于由电流表和初级和次级电压表同时获得的测量值来计算多个绕组组合的比率，饱和曲线和拐点。

    Concurrent Transformer Test System and Method
    24.
    发明申请
    Concurrent Transformer Test System and Method 有权
    并联变压器测试系统和方法

    公开(公告)号：US20140118015A1

    公开(公告)日：2014-05-01

    申请号：US13660816

    申请日：2012-10-25

    申请人： AVO Multi-Amp Corporation d/b/a Megger

    发明人： David Hembree Milner, JR. ,  John Leonard Shanks ,  Harvey Wayne Veselka, JR.

    IPC分类号： G01R29/20

    CPC分类号： G01R29/20 ,  G01R31/027 ,  H01H2009/0061

    摘要： A tester for testing a transformer is provided. The tester comprises a primary voltmeter and a plurality of secondary voltmeters. The tester may also comprise an ammeter in series with a voltage source configured to apply voltage to the transformer. The primary voltmeter is configured to measure voltage induced across a primary winding of the transformer, while the secondary voltmeters may simultaneously measure voltage outputs at secondary windings of the transformer. The tester is configured to calculate ratios, saturation curves, and knee points for multiple winding combinations based on the measurements simultaneously obtained by the ammeter and the primary and secondary voltmeters.

    摘要翻译： 提供了一台用于测试变压器的测试仪。 测试仪包括初级电压表和多个次级电压表。 测试器还可以包括与被配置为向变压器施加电压的电压源串联的电流表。 主电压表被配置为测量变压器的初级绕组上感应的电压，而次级电压表可以同时测量变压器次级绕组的电压输出。 测试仪被配置为基于由电流表和初级和次级电压表同时获得的测量值来计算多个绕组组合的比率，饱和曲线和拐点。

    Fault-annuciating system for a transformer
    25.
    发明授权
    Fault-annuciating system for a transformer 失效
    变压器故障报警系统

    公开(公告)号：US06949934B1

    公开(公告)日：2005-09-27

    申请号：US10431286

    申请日：2003-05-07

    申请人： Tri D. Vu ,  Joseph Oravsky

    发明人： Tri D. Vu ,  Joseph Oravsky

    IPC分类号： G01R29/20 ,  G01R31/06 ,  G01R35/02 ,  H01F27/40

    CPC分类号： H01F27/40 ,  G01R35/02 ,  H01F2027/404

    摘要： A preferred embodiment of a transformer includes a core, and a primary and a secondary winding positioned on the core so that the primary and secondary windings are inductively coupled when the primary winding is energized. The transformer also includes a sensor for measuring an operating parameter of the transformer, an audible signaling device, and an actuator for activating the audible signaling device when the operating parameter reaches a predetermined value.

    摘要翻译： 变压器的优选实施例包括芯，以及定位在芯上的初级和次级绕组，使得当初级绕组通电时，初级和次级绕组感应耦合。 变压器还包括用于测量变压器的操作参数的传感器，可听信号装置和用于当操作参数达到预定值时激活可听信号装置的致动器。

    Apparatus and method for determining the number of turns on a sample coil
    26.
    发明授权
    Apparatus and method for determining the number of turns on a sample coil 失效
    用于确定采样线圈上的匝数的装置和方法

    公开(公告)号：US4490671A

    公开(公告)日：1984-12-25

    申请号：US432147

    申请日：1983-01-17

    申请人： William H. Morong, III

    发明人： William H. Morong, III

    IPC分类号： G01R29/20 ,  G01R31/02 ,  G01R31/06

    CPC分类号： G01R29/20 ,  G01R31/027 ,  G01R31/06

    摘要： An apparatus and method for determining the number of turns on a sample coil are disclosed. An alternating current of substantially constant amplitude is passed through a primary winding turn which is coupled to the sample coil and also through a primary winding turn which is coupled to a standard coil of known turns count, inducing currents in the sample coil and in the standard coil in inverse proportion to their respective turns counts. These induced currents are commutated into pulsating direct currents that are fed into a ratiometric current meter. This meter produces a measurement output corresponding to the ratio of the current induced in the standard coil to the current induced in the sample coil. This measurement output is displayed on a calibrated readout device as an indication of the number of turns on the sample coil. In addition, means are provided for indicating coil discontinuity and inverted coil phase.

    摘要翻译： 公开了一种用于确定采样线圈上的匝数的装置和方法。 基本上恒定振幅的交流电流通过初级绕组匝，该初级绕组匝耦合到采样线圈，并且还通过初级绕组匝，该绕组匝耦合到具有已知匝数的标准线圈，从而感测采样线圈中的电流和标准 线圈与它们各自的匝数成反比。 这些感应电流被转换成脉冲直流，被馈送到比例电流表中。 该仪表产生对应于在标准线圈中感应的电流与在采样线圈中感应的电流的比率的测量输出。 该测量输出显示在校准的读出装置上，作为采样线圈上匝数的指示。 另外，提供用于指示线圈不连续性和反相线圈相位的装置。