WO2007108668A1 - Current inductive sensor - Google Patents
Current inductive sensor Download PDFInfo
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- WO2007108668A1 WO2007108668A1 PCT/MD2007/000002 MD2007000002W WO2007108668A1 WO 2007108668 A1 WO2007108668 A1 WO 2007108668A1 MD 2007000002 W MD2007000002 W MD 2007000002W WO 2007108668 A1 WO2007108668 A1 WO 2007108668A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
Definitions
- the invention relates to electrical engineering, in particular to inductive current sensors and can be used in single-phase and multiphase electricity meters.
- the known technical solution is an inductive current sensor comprising a primary winding consisting of two coils and a secondary winding located inside the primary winding and also consisting of two coils [3].
- the disadvantages of this technical solution are the high requirements for structural solutions, as well as increased sensitivity to mechanical and thermal influences, including local ones.
- the placement of the sensor on a printed circuit board is not always effective.
- the inductive current sensor comprises a housing, a primary winding comprising two coils, and a secondary winding located coaxially with the primary winding, including also two coils.
- the novelty of the invention in the first embodiment is that the primary winding coils are located on the outside of the housing, and the secondary winding coils are located inside the housing.
- Sensor additionally contains a screen made of electrically conductive material and located inside the housing above the secondary winding, and the leads of the secondary coils are placed in a shielding with an electrically insulating coating forming a shielded cable, while the shielding is connected to the sensor screen.
- the secondary coils are located on the same axis.
- the housing is made of insulating material, and its shape corresponds to the shape of the primary winding.
- the inductive current sensor is equipped with a locking element for mounting the primary winding on the housing or locking elements for mounting each primary coil on the housing. The turns of one coil of the primary winding are wound opposite to the turns of the second coil.
- the novelty of the invention lies in the fact that the secondary winding is made in the form of at least one printed circuit board and is located inside the housing, and the inside of the sensor is filled with a compound.
- the result of this invention is to increase the level of the useful output signal and reduce the impact of external mechanical and temperature factors, as well as sensitivity to external electromagnetic fields.
- FIG. 1 is an inductive current sensor in isometry of FIG. 2 is a sectional view of an inductive current sensor of FIG. 3 is an inductive current sensor for a transformer inclusion counter in a perspective view of FIG. 4 is an inductive current sensor based on printed circuit boards in the context of FIG. 5 is an inductive current sensor based on printed circuit boards in a perspective view of FIG. 6 - inductive sensor with a secondary winding made on the basis of printed circuit boards, front view.
- the inductive current sensor includes a primary winding 1, consisting of two coils 2 and 3, a secondary winding 4, located inside the primary winding 1, and also consisting of two coils 5 and 6, which are located on the same axis.
- the sensor further comprises a screen 7, located between the primary 1 and secondary windings 4, made of electrically conductive material, and the screen 7 is connected to the shielding sheath 8 of the shielded cable 9, in which the leads 10 and 11 of the secondary windings are placed, and between the screen 7 and the primary winding 1 there is a housing 12 made of insulating material.
- the housing 12 repeats the shape of the primary winding and is provided with a latch 13 for the primary winding.
- the proposed sensor operates as follows. When current flows through the coil 2 of the primary winding 1, a useful electromotive force is induced in the coil 5 of the secondary winding 4, and then when current flows through the coil 3 of the primary winding 1, a useful electromotive force appears in the coil 6 of the secondary winding 4.
- each coil of the secondary winding 4 is a measuring one, and their connection is made in such a way that the useful electromotive force induced by the coils 2 and 3 of the primary winding in the coils 5 and 6 of the secondary winding is summed. Since the currents of the primary winding have the opposite direction, as follows from the design of the sensor (figure 1), the electromotive force induced by external electromagnetic fields is subtracted. •
- Reducing sensitivity to external electromagnetic fields is achieved through the use of coils of the same geometry, and each of them is both measuring and compensating.
- a decrease in sensitivity to external electromagnetic fields is also achieved by arranging the centers of the coils on one axis in the direction of maximum sensitivity to external electromagnetic fields.
- the sensitivity to external electromagnetic fields is directly proportional to the geometric dimensions of the sensor, therefore, to obtain the minimum geometric dimensions of the sensor, the secondary winding is located inside the primary winding.
- the housing 12 repeats the shape of the primary winding 1.
- Reducing the sensitivity of the conversion coefficient of the inductive current sensor to external mechanical and thermal influences is achieved by fixing on the housing 12 having a locking element 13 of the primary winding 1.
- fixing the secondary winding 4 in the housing 12 and providing insulation and sealing of the sensor is filled with a compound.
- the terminals 10 and 11 of the secondary windings are placed in a shielded cable 9, the shielding 8 of which is connected to the screen 7.
- FIG. Figure 3 shows an inductive current sensor for transformer turn-on counters; in this case, its primary winding 1 contains the necessary number of turns wound in coil 2 in one direction, and in coil 3 in the opposite direction. The turns of the primary winding are fixed on the housing 12.
- FIG. 4 shows a sensor in which the secondary winding 4 is made in the form of at least one printed circuit board, wherein the outer electrically conductive layers for the at least one printed circuit board 14 can form a screen 7.
- a single type of secondary measuring winding allows the use of an inductive current sensor in all types of meters.
- inductive sensors can be used in conjunction with other types of current sensors, such as current transformers or shunts.
- the free ends of the primary winding 1 are given the necessary shape and cross-section in accordance with the requirements of various standards for connectors.
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Abstract
The invention relates to electromeasuring engineering, in particular to current inductive sensors and can be used for electric single- and polyphase meters. In the first embodiment, the inventive current inductive sensor comprises a body, a primary winding consisting of two coils and a secondary winding which is positioned coaxially with respect to the first winding and also consisting of two coils. The novelty of the invention consists in that the coils of the first winding are located on the external side of the body whereas the coils of the secondary winding are arranged thereinside. The sensor also comprises a screen made of a conductive material and arranged inside the body above the secondary winding. The coil terminals of the secondary winding are placed in a shielding jacket provided with electroinsulating coating forming a shielded conductor, wherein said shielding jacket is connected to the sensor screen. In the second embodiment the novelty of the invention consists in that the secondary winding is embodied in the form of at lest one printed board and is arranged inside the body and the internal part of the sensor is filled with a compound.
Description
ИНДУКТИВНЫЙ ДАТЧИК ТОКА (варианты) Inductive current sensor (options)
Изобретение относится к электроизмерительной технике, а именно к индуктивным датчикам тока и может быть использовано в однофазных и многофазных счетчиках электроэнергии.The invention relates to electrical engineering, in particular to inductive current sensors and can be used in single-phase and multiphase electricity meters.
Известен индуктивный датчик тока, у которого первичная обмотка датчика выполнена из листового металла и имеет сложную форму [1 ].Known inductive current sensor, in which the primary winding of the sensor is made of sheet metal and has a complex shape [1].
Недостатком этого датчика является сложность его изготовления, довольно большие геометрические размеры датчика и невысокий уровень полезного выходного сигнала.The disadvantage of this sensor is the complexity of its manufacture, the rather large geometric dimensions of the sensor and the low level of the useful output signal.
Также известен индуктивный датчик тока, который включает множество дорогостоящих элементов, а его сборка требует значительных затрат времени [2].Also known is an inductive current sensor, which includes many expensive elements, and its assembly requires a significant investment of time [2].
Наиболее близким к изобретению известным техническим решением является индуктивный датчик тока, включающий первичную обмотку, состоящую из двух катушек и вторичную обмотку, размещенную внутри первичной обмотки и также состоящую из двух катушек [3]. Недостатками данного технического решения являются высокие требования к конструктивным решениям, а также повышенная чувствительность к механическим и температурным воздействиям, в том числе локальным.. Кроме того, размещение датчика на печатной плате не всегда эффективно.Closest to the invention, the known technical solution is an inductive current sensor comprising a primary winding consisting of two coils and a secondary winding located inside the primary winding and also consisting of two coils [3]. The disadvantages of this technical solution are the high requirements for structural solutions, as well as increased sensitivity to mechanical and thermal influences, including local ones. In addition, the placement of the sensor on a printed circuit board is not always effective.
Задачей, которую решает данное изобретение, является упрощение конструкции датчика и уменьшение его чувствительности к механическим и температурным воздействиям, в том числе локальным. Сущность изобретения состоит в том, что индуктивный датчик тока, согласно первому варианту, содержит корпус, первичную обмотку, включающую две катушки, и расположенную соосно первичной обмотке вторичную обмотку, включающую также две катушки. Новизна изобретения по первому варианту состоит в том, что катушки первичной обмотки расположены на наружной стороне корпуса, а катушки вторичной обмотки расположены внутри корпуса. Датчик
дополнительно содержит экран, выполненный из электропроводящего материала и расположенный внутри корпуса над вторичной обмоткой, а выводы катушек вторичной обмотки размещены в экранирующей оболочке с электроизолирующим покрытием, образующим экранированный кабель, при этом, экранирующая оболочка соединена с экраном датчика.The task that this invention solves is to simplify the design of the sensor and reduce its sensitivity to mechanical and thermal influences, including local ones. The essence of the invention lies in the fact that the inductive current sensor, according to the first embodiment, comprises a housing, a primary winding comprising two coils, and a secondary winding located coaxially with the primary winding, including also two coils. The novelty of the invention in the first embodiment is that the primary winding coils are located on the outside of the housing, and the secondary winding coils are located inside the housing. Sensor additionally contains a screen made of electrically conductive material and located inside the housing above the secondary winding, and the leads of the secondary coils are placed in a shielding with an electrically insulating coating forming a shielded cable, while the shielding is connected to the sensor screen.
Катушки вторичной обмотки расположены на одной оси. Корпус выполнен из изоляционного материала, а его форма соответствует форме первичной обмотки. Индуктивный датчик тока снабжен фиксирующим элементом для крепления первичной обмотки на корпусе или фиксирующими элементами для крепления каждой катушки первичной обмотки на корпусе. Витки одной катушки первичной обмотки намотаны противоположно виткам второй катушки.The secondary coils are located on the same axis. The housing is made of insulating material, and its shape corresponds to the shape of the primary winding. The inductive current sensor is equipped with a locking element for mounting the primary winding on the housing or locking elements for mounting each primary coil on the housing. The turns of one coil of the primary winding are wound opposite to the turns of the second coil.
Новизна изобретения, согласно второму варианту, состоит в том, что вторичная обмотка выполнена в виде, по меньшей мере, одной печатной платы и расположена внутри корпуса, а внутренняя часть датчика залита компаундом.The novelty of the invention, according to the second embodiment, lies in the fact that the secondary winding is made in the form of at least one printed circuit board and is located inside the housing, and the inside of the sensor is filled with a compound.
Результат данного изобретения состоит в увеличении уровня полезного выходного сигнала и снижении воздействия внешних механических и температурных факторов, а также чувствительности к внешним электромагнитным полям.The result of this invention is to increase the level of the useful output signal and reduce the impact of external mechanical and temperature factors, as well as sensitivity to external electromagnetic fields.
Изобретение поясняется чертежами, представленными на: фиг. 1 - индуктивный датчик тока в изометрии фиг. 2 - индуктивный датчик тока в разрезе фиг. 3 - индуктивный датчик тока для счетчика трансформаторного включения в аксонометрии фиг. 4 - индуктивный датчик тока на базе печатных плат в разрезе фиг. 5 - индуктивный датчик тока на базе печатных плат в аксонометрии фиг. 6 - индуктивный датчик с вторичной обмоткой выполненной на базе печатных плат, вид спереди.The invention is illustrated by the drawings shown in: FIG. 1 is an inductive current sensor in isometry of FIG. 2 is a sectional view of an inductive current sensor of FIG. 3 is an inductive current sensor for a transformer inclusion counter in a perspective view of FIG. 4 is an inductive current sensor based on printed circuit boards in the context of FIG. 5 is an inductive current sensor based on printed circuit boards in a perspective view of FIG. 6 - inductive sensor with a secondary winding made on the basis of printed circuit boards, front view.
Пример осуществления изобретения:An example embodiment of the invention:
Индуктивный датчик тока включает первичную обмотку 1 , состоящую из двух катушек 2 и 3, вторичную обмотку 4, размещенную внутри первичной обмотки 1 , и также состоящую из двух катушек 5 и 6, которые расположены на одной оси. Датчик дополнительно содержит экран 7, размещенный между первичной 1 и вторичной обмотками 4, выполненный из электропроводящего материала, причем
экран 7 соединен с экранирующей Оболочкой 8 экранированного кабеля 9, в которой размещены выводы 10 и 11 вторичных обмоток, а между экраном 7 и первичной обмоткой 1 размещен корпус 12 из изолирующего материала.The inductive current sensor includes a primary winding 1, consisting of two coils 2 and 3, a secondary winding 4, located inside the primary winding 1, and also consisting of two coils 5 and 6, which are located on the same axis. The sensor further comprises a screen 7, located between the primary 1 and secondary windings 4, made of electrically conductive material, and the screen 7 is connected to the shielding sheath 8 of the shielded cable 9, in which the leads 10 and 11 of the secondary windings are placed, and between the screen 7 and the primary winding 1 there is a housing 12 made of insulating material.
Корпус 12 повторяет форму первичной обмотки и снабжен фиксатором 13 для первичной обмотки.The housing 12 repeats the shape of the primary winding and is provided with a latch 13 for the primary winding.
Предлагаемый датчик работает следующим образом. При протекании тока по катушке 2 первичной обмотки 1 индуцируется полезная электродвижущая сила в катушке 5 вторичной обмотки 4, и далее при протекании тока по катушке 3 первичной обмотки 1 появляется полезная электродвижущая сила в катушке 6 вторичной обмотки 4. Таким образом, каждая катушка вторичной обмотки 4 является измерительной, а их соединение выполнено таким образом, что полезная электродвижущая сила, индуцируемая катушками 2 и 3 первичной обмотки в катушках 5 и 6 вторичной обмотки, суммируется. Так как токи первичной обмотки имеют противоположное направление, как следует из конструкции датчика (фиг.1 ), то электродвижущая сила, индуцированная внешними электромагнитными полями, вычитается. • The proposed sensor operates as follows. When current flows through the coil 2 of the primary winding 1, a useful electromotive force is induced in the coil 5 of the secondary winding 4, and then when current flows through the coil 3 of the primary winding 1, a useful electromotive force appears in the coil 6 of the secondary winding 4. Thus, each coil of the secondary winding 4 is a measuring one, and their connection is made in such a way that the useful electromotive force induced by the coils 2 and 3 of the primary winding in the coils 5 and 6 of the secondary winding is summed. Since the currents of the primary winding have the opposite direction, as follows from the design of the sensor (figure 1), the electromotive force induced by external electromagnetic fields is subtracted. •
Понижение чувствительности к внешним электромагнитным полям достигается за счет использования катушек одинаковой геометрии, причем каждая из них является как измерительной, так и компенсирующей. Понижение чувствительности к внешним электромагнитным полям также достигается за счет расположения центров катушек на одной оси в направлении максимальной чувствительности к внешним электромагнитным полям. Кроме того, чувствительность к внешним электромагнитным полям прямо пропорциональна геометрическим размерам датчика, поэтому для получения минимальных геометрических размеров датчика вторичная обмотка расположена внутри первичной обмотки.Reducing sensitivity to external electromagnetic fields is achieved through the use of coils of the same geometry, and each of them is both measuring and compensating. A decrease in sensitivity to external electromagnetic fields is also achieved by arranging the centers of the coils on one axis in the direction of maximum sensitivity to external electromagnetic fields. In addition, the sensitivity to external electromagnetic fields is directly proportional to the geometric dimensions of the sensor, therefore, to obtain the minimum geometric dimensions of the sensor, the secondary winding is located inside the primary winding.
Для получения максимального коэффициента связи между первичной 1 и вторичной 4 обмотками уменьшено расстояние между ними за счет использования диэлектрического корпуса 12. Также для увеличения коэффициента связи между первичной 1 и вторичной 4 обмотками, корпус 12 повторяет форму первичной обмотки 1.To obtain the maximum coupling coefficient between the primary 1 and secondary 4 windings, the distance between them is reduced due to the use of the dielectric housing 12. Also, to increase the coupling coefficient between the primary 1 and secondary 4 windings, the housing 12 repeats the shape of the primary winding 1.
Понижение чувствительности коэффициента преобразования индуктивного датчика тока к внешним механическим и температурным воздействиям достигается за счет фиксации на корпусе 12, имеющем элемент фиксации 13 первичной обмотки 1. Кроме того, для фиксации вторичной обмотки 4 в корпусе 12
и обеспечения изоляции и герметизации датчика внутренняя его часть после сборки заливается компаундом.Reducing the sensitivity of the conversion coefficient of the inductive current sensor to external mechanical and thermal influences is achieved by fixing on the housing 12 having a locking element 13 of the primary winding 1. In addition, for fixing the secondary winding 4 in the housing 12 and providing insulation and sealing of the sensor, its internal part after assembly is filled with a compound.
Для защиты от влияния внешнего напряжения и радиопомех выводы 10 и 11 вторичных обмоток помещаются в экранированный кабель 9, экранирующая оболочка 8 которого соединена с экраном 7.To protect against the influence of external voltage and radio interference, the terminals 10 and 11 of the secondary windings are placed in a shielded cable 9, the shielding 8 of which is connected to the screen 7.
На фиг. 3 представлен индуктивный датчик тока для счетчиков трансформаторного включения, при .этом его первичная обмотка 1 содержит необходимое количество витков, намотанных в катушке 2 в одну сторону, а в катушке 3 - в противоположную. Витки ' первичной обмотки фиксируются на корпусе 12.In FIG. Figure 3 shows an inductive current sensor for transformer turn-on counters; in this case, its primary winding 1 contains the necessary number of turns wound in coil 2 in one direction, and in coil 3 in the opposite direction. The turns of the primary winding are fixed on the housing 12.
На фиг. 4 представлен датчик, в котором вторичная обмотка 4 выполнена в виде, по меньшей мере, одной печатной платы, причем внешние электропроводящие слои для, по меньшей мере одной печатной платы 14, могут образовывать экран 7.In FIG. 4 shows a sensor in which the secondary winding 4 is made in the form of at least one printed circuit board, wherein the outer electrically conductive layers for the at least one printed circuit board 14 can form a screen 7.
Единый тип вторичной измерительной обмотки позволяет использовать индуктивный датчик тока во всех типах счетчиков.A single type of secondary measuring winding allows the use of an inductive current sensor in all types of meters.
В сложных конструкциях индуктивные датчики могут быть использованы совместно с другими типами датчиков тока, например с трансформаторами тока или шунтами.In complex designs, inductive sensors can be used in conjunction with other types of current sensors, such as current transformers or shunts.
Свободным концам первичной обмотки 1 придается необходимая форма и сечение в соответствии с требованиями различных стандартов к разъемам.The free ends of the primary winding 1 are given the necessary shape and cross-section in accordance with the requirements of various standards for connectors.
(56) Библиографические данные:(56) Bibliographic data:
1. US4894610 1990.01.161. US4894610 1990.01.16
2. US5521572 1996.05.282. US5521572 1996.05.28
3. EP1515146 2005.03.16
3. EP1515146 2005.03.16
Claims
1. Индуктивный датчик тока, содержащий корпус, первичную обмотку, включающую две катушки и расположенную соосно первичной обмотке вторичную обмотку, включающую также две катушки, отличающийся тем, что катушки первичной обмотки расположены на наружной стороне корпуса, катушки вторичной обмотки расположены внутри корпуса, причем датчик дополнительно содержит экран, выполненный из электропроводящего материала и расположенный внутри корпуса над вторичной обмоткой, а выводы катушек вторичной обмотки размещены в экранирующей оболочке с электроизолирующим покрытием, образующим экранированный кабель, при этом, экранирующая оболочка соединена с экраном датчика.1. An inductive current sensor comprising a housing, a primary winding including two coils and a secondary winding located coaxially with the primary winding, also including two coils, characterized in that the primary winding coils are located on the outside of the housing, the secondary winding coils are located inside the housing, the sensor being additionally contains a screen made of an electrically conductive material and located inside the housing above the secondary winding, and the conclusions of the coils of the secondary winding are placed in a shielding with electric ktroizoliruyuschim coating forming a shielded cable, thus, shielding screen is connected to the sensor.
2. Индуктивный датчик тока по п. 1 , отличающийся тем, что катушки вторичной обмотки соосны.2. The inductive current sensor according to claim 1, characterized in that the coils of the secondary winding are coaxial.
3. Индуктивный датчик тока по пп. 1 , 2, отличающийся тем, что корпус выполнен из изоляционного материала, а его форма соответствует форме первичной обмотки.3. Inductive current sensor for PP. 1, 2, characterized in that the housing is made of insulating material, and its shape corresponds to the shape of the primary winding.
4. Индуктивный датчик тока по пп. 1...3, отличающийся тем, что он снабжен фиксирующим элементом для крепления первичной обмотки на корпусе.4. Inductive current sensor for PP. 1 ... 3, characterized in that it is equipped with a locking element for mounting the primary winding on the housing.
5. Индуктивный датчик тока по пп. 1...3, отличающийся тем, что он снабжен фиксирующими элементами для крепления каждой катушки первичной обмотки на корпусе.5. Inductive current sensor for PP. 1 ... 3, characterized in that it is equipped with locking elements for mounting each primary coil on the housing.
6. Индуктивный датчик тока по пп. 1...5, отличающийся тем, что витки одной катушки первичной обмотки намотаны противоположно виткам второй катушки.6. Inductive current sensor for PP. 1 ... 5, characterized in that the turns of one coil of the primary winding are wound opposite to the turns of the second coil.
7. Индуктивный датчик тока, содержащий корпус, первичную обмотку, включающую две катушки, и вторичную обмотку, отличающийся тем, что катушки первичной обмотки расположены на наружной стороне корпуса, вторичная обмотка выполнена в виде, по меньшей мере, одной печатной платы и расположена внутри корпуса, датчик дополнительно содержит экран, выполненный из электропроводящего материала и расположенный внутри корпуса над вторичной обмоткой, причем выводы катушек Ёторичной обмотки размещены в экранирующей оболочке с электроизолирующим покрытием, образующим экранированный кабель, при этом, экранирующая оболочка соединена с экраном датчика.7. An inductive current sensor comprising a housing, a primary winding including two coils, and a secondary winding, characterized in that the primary winding coils are located on the outside of the housing, the secondary winding is made in the form of at least one printed circuit board and is located inside the housing , the sensor further comprises a screen, made of electrically conductive material and located inside the housing above the secondary winding, and the terminals of the coils of the Secondary winding are placed in a shielding with an electrically insulating coating forming a shielded cable, while the shielding is connected to the sensor screen.
8. Индуктивный датчик тока по п. 7, отличающийся тем, что внутренняя часть датчика залита компаундом. 8. The inductive current sensor according to claim 7, characterized in that the inside of the sensor is flooded with a compound.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20060094A MD3172F1 (en) | 2006-03-23 | 2006-03-23 | Current inductance pickup (variants) |
| MDA20060094 | 2006-03-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007108668A1 true WO2007108668A1 (en) | 2007-09-27 |
Family
ID=37397479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/MD2007/000002 WO2007108668A1 (en) | 2006-03-23 | 2007-02-20 | Current inductive sensor |
Country Status (2)
| Country | Link |
|---|---|
| MD (2) | MD3172F1 (en) |
| WO (1) | WO2007108668A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9035736B2 (en) | 2013-03-27 | 2015-05-19 | General Electric Company | Magnetic device having integrated current sensing element and methods of assembling same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1416919A1 (en) * | 1986-12-15 | 1988-08-15 | Предприятие П/Я В-2015 | Current transducer |
| SU1513532A1 (en) * | 1987-09-01 | 1989-10-07 | Предприятие П/Я В-8803 | Current measuring device |
| SU1721641A1 (en) * | 1989-07-03 | 1992-03-23 | Самарское Производственное Объединение "Завод Им.Масленникова" | Pulse transformer |
| JPH11133067A (en) * | 1997-11-04 | 1999-05-21 | Toshiba Corp | Coil winding current detection device or the like of stationary induction equipment |
| JP2003270059A (en) * | 2002-03-14 | 2003-09-25 | Maeda Corp | System for measuring stress present in reinforcing bar of reinforced concrete structure |
-
2006
- 2006-03-23 MD MDA20060094A patent/MD3172F1/en not_active IP Right Cessation
- 2006-03-23 MD MDA20060094D patent/MD3172C8/en not_active IP Right Cessation
-
2007
- 2007-02-20 WO PCT/MD2007/000002 patent/WO2007108668A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1416919A1 (en) * | 1986-12-15 | 1988-08-15 | Предприятие П/Я В-2015 | Current transducer |
| SU1513532A1 (en) * | 1987-09-01 | 1989-10-07 | Предприятие П/Я В-8803 | Current measuring device |
| SU1721641A1 (en) * | 1989-07-03 | 1992-03-23 | Самарское Производственное Объединение "Завод Им.Масленникова" | Pulse transformer |
| JPH11133067A (en) * | 1997-11-04 | 1999-05-21 | Toshiba Corp | Coil winding current detection device or the like of stationary induction equipment |
| JP2003270059A (en) * | 2002-03-14 | 2003-09-25 | Maeda Corp | System for measuring stress present in reinforcing bar of reinforced concrete structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9035736B2 (en) | 2013-03-27 | 2015-05-19 | General Electric Company | Magnetic device having integrated current sensing element and methods of assembling same |
| US9171667B2 (en) | 2013-03-27 | 2015-10-27 | General Electric Company | Magnetic device having integrated current sensing element and methods of assembling same |
Also Published As
| Publication number | Publication date |
|---|---|
| MD3172F1 (en) | 2006-10-31 |
| MD3172C8 (en) | 2008-05-31 |
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