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公开(公告)号：US11798733B2
公开(公告)日：2023-10-24
申请号：US17465987
申请日：2021-09-03
发明人： Nikolay Tal , Tzachi Glovinsky
CPC分类号： H01F27/323 , G01R29/20 , G01R31/62 , H01F27/36
摘要： Systems, apparatuses, and methods are described for a transformer supporting two or more sets of windings electrically connected to different voltage levels. Use of stress control materials or composite materials (comprising a matrix and filler) may direct electrical fields caused by the different voltage levels to have a lowered electrical field amplitude.
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公开(公告)号：US11156671B2
公开(公告)日：2021-10-26
申请号：US16752125
申请日：2020-01-24
发明人： Mark F. Lachman
摘要： A method for performing diagnostics on a target transformer includes applying a voltage output of a voltage generator to a winding or phase of the target transformer; controlling the voltage generator to output an AC voltage at a first frequency and then a second frequency and measuring first and second excitation currents flowing into the target transformer associated with the first frequency and second frequency, respectively. The method further includes determining an actual excitation current of the target transformer as a function of both the first and second excitation currents, and comparing the actual excitation current of the target transformer to excitation currents associated with one or more benchmark transformers having known electrical characteristics. And when the actual excitation current of the target transformer matches an excitation current of one of benchmark transformers, determining the electrical characteristics of the target transformer to match electrical characteristics of the one benchmark transformer.
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公开(公告)号：US11105838B2
公开(公告)日：2021-08-31
申请号：US16254292
申请日：2019-01-22
IPC分类号： G01R29/20
摘要： A turns ratio meter may be connected to each phase of each set of windings. The excitation voltage used in testing is a DC square wave. The excitation voltage is relatively low, between 1 and 48 volts. The step down and step up testing is performed several times with different voltages and/or frequencies. Excitation losses of the transformer are determined based upon the multiple step down and step up tests. The step down and step up testing can be performed without reconfiguring the test leads on the transformer. The testing is performed on a single phase of the transformer or all three phases of the transformer simultaneously. The turns ratio of the transformer is accurately determined using the results of the step down and step up testing and the calculated excitation losses.
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公开(公告)号：US10794964B2
公开(公告)日：2020-10-06
申请号：US15548950
申请日：2016-01-26
发明人： Markus Pütter , Bernd Marte
摘要： To ascertain a parameter of a transformer (40) that has a high voltage side (41) and a low voltage side (43), a test signal generated by a source (13) is impressed on the low voltage side (43). A test response of the transformer (40) is recorded. A leakage reactance and/or a leakage inductance of the transformer (40) is determined by an evaluation device (18) of an apparatus (10) on the basis of the test response of the transformer (40).
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公开(公告)号：US10416209B2
公开(公告)日：2019-09-17
申请号：US16075858
申请日：2017-02-13
申请人： ABB Schweiz AG
IPC分类号： G01R21/133 , G01R19/25 , G01R31/02 , G01R29/20
摘要： A system and a method for determining the power loss of a transformer. The method includes measuring voltage and current at the primary side of the transformer, calculating input power by multiplying the measured current and voltage on the primary side of the transformer; measuring voltage and current at the secondary side of the transformer, calculate a nominal error ratio, calculating output power by multiplying the measured current and voltage on the secondary side of the transformer. The method further involves calculating a first corrected power loss by means of multiplying the input power with the nominal error ratio and subtract the output power.
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公开(公告)号：US20190227108A1
公开(公告)日：2019-07-25
申请号：US16254292
申请日：2019-01-22
IPC分类号： G01R29/20
摘要： A turns ratio meter may be connected to each phase of each set of windings. The excitation voltage used in testing is a DC square wave. The excitation voltage is relatively low, between 1 and 48 volts. The step down and step up testing is performed several times with different voltages and/or frequencies. Excitation losses of the transformer are determined based upon the multiple step down and step up tests. The step down and step up testing can be performed without reconfiguring the test leads on the transformer. The testing is performed on a single phase of the transformer or all three phases of the transformer simultaneously. The turns ratio of the transformer is accurately determined using the results of the step down and step up testing and the calculated excitation losses.
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公开(公告)号：US20180011131A1
公开(公告)日：2018-01-11
申请号：US15714384
申请日：2017-09-25
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.
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公开(公告)号：US09366744B2
公开(公告)日：2016-06-14
申请号：US12673212
申请日：2008-08-12
CPC分类号： G01R35/02 , G01R1/203 , G01R29/20 , G01R31/027
摘要： A method and apparatus for testing a transformer. A controller generates a switching signal and supplies the switching signal to a solid state switch in circuit with a test load of known magnitude, switching the solid state switch to place the test load in circuit with the transformer. A signal through or across the transformer is then measured. Methods and apparatus for testing a transformer comprise the controller and solid state switch placing a series of test loads of different known magnitudes in circuit with the transformer from the lowest magnitude to the highest, from the highest to the lowest, or both. Additionally, a test load array comprises a plurality of power resistors, a heat sink for accommodating the plurality of power resistors, and a material providing electrical insulation of the power resistors from the heat sink and thermal conductivity between the power resistors and the heat sink.
摘要翻译： 一种用于测试变压器的方法和装置。 控制器产生开关信号，并将切换信号提供给具有已知幅度的测试负载的电路中的固态开关，切换固态开关以将测试负载置于与变压器的电路中。 然后测量通过或跨越变压器的信号。 用于测试变压器的方法和装置包括控制器和固态开关，其将与变压器的电路中的不同已知幅度的一系列测试负载从最低到最高，从最高到最低，或两者兼有。 此外，测试负载阵列包括多个功率电阻器，用于容纳多个功率电阻器的散热器，以及提供来自散热器的功率电阻器的电绝缘以及功率电阻器和散热器之间的导热性的材料。
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公开(公告)号：US20150279553A1
公开(公告)日：2015-10-01
申请号：US14675541
申请日：2015-03-31
发明人： Josue Kure , Timothy Gomez , Patrick Arvin
CPC分类号： G01R29/20 , G01R23/00 , G01R27/02 , G01R31/027 , G01R35/02 , H01F21/12 , H01F27/42 , H01F38/28 , H01F2029/143
摘要： A system and method for tuning a transformer is provided. A transformer fixture may connect a switching network to a plurality of inductors of a transformer. At least one computing device may calculate a target number of turns for a primary coil and a secondary coil of the transformer based on a frequency response of the transformer. The switching network may connect the inductors of the transformer together in a pattern that results in the primary coil and secondary coil having the target number of turns.
摘要翻译： 提供了一种用于调谐变压器的系统和方法。 变压器夹具可以将开关网络连接到变压器的多个电感器。 至少一个计算设备可以基于变压器的频率响应来计算变压器的初级线圈和次级线圈的目标匝数。 开关网络可以以导致初级线圈和次级线圈具有目标匝数的图案将变压器的电感器连接在一起。
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50.发明授权Method and apparatus for calculating the number of turns per segment of a transformer coil winding 失效用于计算变压器线圈绕组的每个匝数的方法和装置公开(公告)号：US07795884B2
公开(公告)日：2010-09-14
申请号：US11504411
申请日：2006-08-15
申请人： David N. Cox
发明人： David N. Cox
CPC分类号： H01F41/06
摘要： A method and an apparatus for calculating the number of turns per segment of a transformer coil winding which has a plurality of segments connected in series. The number of turns per segments is computed by assigning to segments predefined parameters related to customer requirements. Then a system of linear equations is automatically generated and the equations are simultaneously solved.
摘要翻译： 一种用于计算具有串联连接的多个段的变压器线圈绕组的每个匝数的方法和装置。 通过将与客户要求相关的预定义参数分配给段来计算每个段的圈数。 然后自动生成线性方程组，同时求解方程。
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