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公开(公告)号：US11163017B2
公开(公告)日：2021-11-02
申请号：US16662655
申请日：2019-10-24
发明人： Saman Mostafavi , Hong Yu , Ajay Raghavan , Peter Kiesel
IPC分类号： G01R29/20 , G01R31/62 , G01J3/18 , G01L1/24 , H01F27/08 , H04B3/46 , G01N17/00 , H01F27/02 , G01R19/25 , G01R35/02 , G01R31/72 , G01R31/52 , G01R1/28 , G01R31/34 , G01R15/20
摘要： A monitoring system includes an array of optical sensors disposed within a transformer tank. Each optical sensor is configured to have an optical output that changes in response to a temperature within the transformer tank. An analyzer is coupled to the array of optical sensors. The analyzer is configured to determine a sensed temperature distribution based on the sensed temperature. The sensed temperature distribution is compared to an expected distribution. Exterior contamination of the transformer tank is detected based on the comparison.
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公开(公告)号：US10859612B2
公开(公告)日：2020-12-08
申请号：US15579486
申请日：2016-07-07
发明人： Ulrich Klapper , Steffen Kaiser
IPC分类号： G01R31/06 , G01R29/20 , G01R21/06 , G01R19/25 , H02H3/04 , G01R31/327 , G01R35/02 , G01R31/67 , G01R19/14
摘要： A testing device for an apparatus of an energy system which has inputs that can be connected in a conductive manner to at least one current transformer and at least one voltage transformer. The testing device is designed to apply a first test signal to a secondary side of the voltage transformer and, at the same time, to apply a second test signal to a primary side of the current transformer.
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公开(公告)号：US20200217881A1
公开(公告)日：2020-07-09
申请号：US16732991
申请日：2020-01-02
发明人： Guillaume Lefevre
摘要： A device including at least two transfomers, wherein: each winding of a transformer is electrically in series with a winding of another transformer, and the transformers have a transformation ratio different from one.
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公开(公告)号：US10514275B2
公开(公告)日：2019-12-24
申请号：US15476913
申请日：2017-03-31
发明人： Byung Cheol Na , Won Young Lee
IPC分类号： G01B7/14 , G01B7/30 , H01F5/00 , G01D5/20 , G01V3/15 , G01V3/08 , G01V3/00 , G01D5/14 , H02K24/00 , H02K1/16 , G01R15/18 , G01R29/20 , H02K19/06 , H02K23/24 , H02K37/20 , H02K47/24 , H02K11/225 , G01V3/165
摘要： The embodiments relates to a stator used in resolvers, in which multiple slots are formed at constant intervals in the circumferential direction and have an excitation coil, a first output coil, and a second output coil are respectively wound around the multiple slots. The excitation coil is wound by a number of windings that is changed on the basis of a sinusoidal wave in accordance with the order of the multiple slots in the circumferential direction. After the first output coil is wound by a number of windings resulting from the division of the total number of windings by a constant ratio, the second output coil is wound, and then the rest of the first output coil is wound.
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公开(公告)号：US09817053B2
公开(公告)日：2017-11-14
申请号：US14782183
申请日：2014-02-04
发明人： Michael Krüger , Dmitry Atlas , Florian Predl , Markus Jäger , Michael Freiburg
CPC分类号： G01R31/027
摘要： For testing a transformer (20) the transformer (20) is emulated by an equivalent circuit (30) and an accuracy of the transformer (20) relative to the equivalent circuit (30) is determined by evaluating a test response of the transformer (20) and is then automatically converted to an operating condition-related accuracy of the transformer (20).
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公开(公告)号：US09772362B2
公开(公告)日：2017-09-26
申请号：US14846324
申请日：2015-09-04
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：US5055757A
公开(公告)日：1991-10-08
申请号：US589186
申请日：1990-09-27
申请人： Edward Cammarata
发明人： Edward Cammarata
IPC分类号： G01R29/20
CPC分类号： G01R29/20 , G01R31/027
摘要： A toroid turns counter for a toroid with at least one winding with turns to be counted by electric counting device connected to said winding having a test winding with an opening for receiving the toroid, a movable contact arm for electrically closing the opening after the toroid has been received in the opening, an activating arrangement which is coupled to the contact arm, and controls coupled to the activating arrangement for controlling the closure of the contact arm.
摘要翻译： 环形线圈与具有至少一个绕组的环形线圈相反，具有通过连接到具有用于接收环形线圈的开口的具有测试绕组的所述绕组的计数装置进行计数，用于在环形线圈之后用于电闭合开口的可动接触臂 被接收在开口中，激活装置耦合到接触臂，并且被耦合到激活装置的控制以控制接触臂的闭合。
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公开(公告)号：US11555864B2
公开(公告)日：2023-01-17
申请号：US17513255
申请日：2021-10-28
发明人： Saman Mostafavi , Hong Yu , Ajay Raghavan , Peter Kiesel
IPC分类号： G01R29/20 , G01R31/62 , G01J3/18 , G01L1/24 , H01F27/08 , H04B3/46 , G01N17/00 , H01F27/02 , G01R19/25 , G01R35/02 , G01R31/72 , G01R31/52 , G01R1/28 , G01R31/34 , G01R15/20
摘要： A monitoring system includes an array of optical sensors disposed within a transformer tank. Each optical sensor is configured to have an optical output that changes in response to a temperature within the transformer tank. An analyzer is coupled to the array of optical sensors. The analyzer is configured to determine a sensed temperature distribution based on the sensed temperature. The sensed temperature distribution is compared to an expected distribution. Exterior contamination of the transformer tank is detected based on the comparison.
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公开(公告)号：US10775449B2
公开(公告)日：2020-09-15
申请号：US16062970
申请日：2016-12-14
发明人： Ulrich Klapper , Matthias Kukuk , Christoph Engelen , Dirk Flax
摘要： A mobile transformer test device (10) for testing a power transformer (40) has connectors (12) for the detachable connection of the transformer test device (10) to the power transformer (40). The transformer test device (10) has a source (5) for generating a test signal. The mobile transformer test device (10) has an evaluation circuit (6) for determining, based on the test signal and a test response of the power transformer (40), information regarding a B-H curve (50, 60) of the power transformer (40).
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公开(公告)号：US10527662B2
公开(公告)日：2020-01-07
申请号：US15714384
申请日：2017-09-25
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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