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1. 发明申请

US20190033345A1 A CURRENT MEASURING DEVICE PROTECTED AGAINST ELECTRICAL SURGES WHEN OPENING THE CIRCUIT 审中-公开
公开(公告)号：US20190033345A1
公开(公告)日：2019-01-31
申请号：US16071718
申请日：2017-01-09
申请人： SAFRAN ELECTRICAL & POWER
发明人： Pierre Henri HENRARD
IPC分类号： G01R15/18 , G01R1/36 , H01F38/30 , H01F38/32
CPC分类号： G01R15/183 , B64D2221/00 , G01R1/36 , G01R31/008 , H01F38/28 , H01F38/30 , H01F38/32 , H01F2038/305
摘要： A current measuring device is protected against electrical surges in the event of the device being open circuit. The device includes a first current transformer, a first connection terminal having connected thereto a first terminal of the first current transformer, a second connection terminal having connected thereto a second terminal of the first current transformer, a protective resistance having a first terminal connected to the second connection terminal, and a load resistance connected between the first and second connection terminals across the terminals of which a voltage is measured from which the current flowing in a circuit passing through the first current transformer is determined. The device also includes a second current transformer connected to the terminals of the protective resistance, and current branch connection structure connected between the first connection terminal and a second terminal of the protective resistance.

2. 发明申请

US20180261368A1 DEMAGNETIZATION DEVICE AND METHOD FOR DEMAGNETIZING A TRANSFORMER CORE 审中-公开
公开(公告)号：US20180261368A1
公开(公告)日：2018-09-13
申请号：US15534428
申请日：2015-12-09
申请人： OMICRON ELECTRONICS GMBH
发明人： Ulrich Klapper
IPC分类号： H01F13/00 , H01F38/32
摘要： In order to demagnetize a transformer core (13, 23) a demagnetization device (40) is detachably connected to a primary side (11) of a transformer (10, 20). An alternating signal is fed to the primary side (11) in order to demagnetize the transformer (10, 20).

3. 发明申请

US20170279228A1 PLUG 有权
公开(公告)号：US20170279228A1
公开(公告)日：2017-09-28
申请号：US15505848
申请日：2015-10-05
申请人： HARTING ELECTRIC GMBH & CO. KG
发明人： Andreas Nass , Hanno Harry Wolff
IPC分类号： H01R13/66 , H01F38/32
CPC分类号： H01R13/6666 , H01F38/32 , H01R13/703 , H01R13/7132
摘要： Provided is a plug for use as a disconnector for current transformers. Two types of short circuits are provided in the plug. A first short circuit is used for diverting overvoltages by short-circuiting the electrical contacts in the plug. A second short circuit is provided for short-circuiting electrical contacts in the plug when the plug is not contacted. The short circuits are designed in such a way that the first short circuit is used as a fuse when the second short circuit fails.

4. 发明申请

US20170047734A1 Docking Module for a Current Transformer for Preventing Overvoltages and a Current Transformer Having a Docking Module 审中-公开
标题翻译：用于防止过电压的电流互感器的对接模块和具有对接模块的电流互感器
公开(公告)号：US20170047734A1
公开(公告)日：2017-02-16
申请号：US15306199
申请日：2015-04-24
申请人： Phoenix Contact GmbH & Co. KG
发明人： Martin Jankowski
IPC分类号： H02H9/04 , H01F27/02 , H01F27/34 , G01R19/165 , H01F27/42 , H01F38/32 , H01R4/30 , H02H9/00 , H01F27/40
摘要： The invention relates to a docking module (22) for a current transformer (10) comprising:an electronic circuit (12) andat least one electric connecting element (28.3) for electrically coupling the circuit (12) to the current transformer (10) and for docking the docking module (22) onto the current transformer (10).
摘要翻译：至少一个用于将电路（12）电耦合到电流互感器（10）并用于将对接模块（22）对接到电流互感器（10）上的电连接元件（28.3）。

5. 发明授权

US09053852B2 Error compensation for current transformer sensors 有权
标题翻译：电流互感器传感器误差补偿
公开(公告)号：US09053852B2
公开(公告)日：2015-06-09
申请号：US13453949
申请日：2012-04-23
申请人： George O. Langer , Christopher Scott Brown , Samad Seyfi
发明人： George O. Langer , Christopher Scott Brown , Samad Seyfi
IPC分类号： H01F38/28 , H01F38/32 , H01F27/42
CPC分类号： H01F38/32 , H01F27/427
摘要： Phase angle error and ratio error correction is provided in a current transformer by a bucking voltage opposite in phase to the voltage drop across the burden resistor and inherent winding resistance.
摘要翻译：在电流互感器中通过与负载电阻和固有绕组电阻两端的电压相位相反的降压电压提供相位角误差和比率误差校正。

6. 发明授权

US08929053B2 Direct-current current transformer 有权
标题翻译：直流电流互感器
公开(公告)号：US08929053B2
公开(公告)日：2015-01-06
申请号：US13136299
申请日：2011-07-28
申请人： William Henry Morong
发明人： William Henry Morong
IPC分类号： H01H9/28 , H01F38/32 , G01R15/18
CPC分类号： H01F38/32 , G01R15/18
摘要： The present invention provides a direct-current current transformer, or DCCT, yielding bandwidth from DC to several MHz. The DCCT according to this invention is a simple, open-loop, device in which flux densities occur at very low levels, avoiding difficulties occasioned by core saturation.
摘要翻译：本发明提供一种直流电流互感器或DCCT，其产生从DC到几MHz的带宽。根据本发明的DCCT是一种简单的开环装置，其中磁通密度以非常低的水平发生，避免了磁芯饱和所引起的困难。

7. 发明授权

US5568047A Current sensor and method using differentially generated feedback 失效
标题翻译：电流传感器和使用差分反馈的方法
公开(公告)号：US5568047A
公开(公告)日：1996-10-22
申请号：US288177
申请日：1994-08-10
申请人： Daniel A. Staver , Juha M. Hakkarainen
发明人： Daniel A. Staver , Juha M. Hakkarainen
IPC分类号： G01R15/18 , G01R11/02 , G01R11/42 , G01R15/04 , G01R19/00 , G01R33/00 , G05F1/10 , H01F38/32 , H03F3/45
CPC分类号： H01F38/32
摘要： A current sensor has one signal interface channel including a transformer having a primary winding, a secondary winding and a feedback winding. A magnetic core magnetically couples the primary winding, the secondary winding and the feedback winding. The current sensor further includes a feedback generating circuit responsive to an AC signal in the secondary winding for generating a feedback signal having a continuous polarity supplied to the feedback winding. The feedback signal being effective for maintaining a flux in the magnetic core substantially near zero. The feedback generating circuit is made up of an operational amplifier, such as an amplifier having first and second differential input ports and first and second differential output ports, and a switching assembly designed to generate a compensating AC signal from a DC offset voltage. The compensating AC signal is conveniently coupled to the operational amplifier through the magnetic core.
摘要翻译：电流传感器具有一个信号接口通道，其包括具有初级绕组，次级绕组和反馈绕组的变压器。磁芯磁耦合初级绕组，次级绕组和反馈绕组。电流传感器还包括响应于次级绕组中的AC信号的反馈产生电路，用于产生具有提供给反馈绕组的连续极性的反馈信号。反馈信号对于将磁芯中的磁通保持基本上接近零是有效的。反馈产生电路由诸如具有第一和第二差分输入端口的放大器和第一和第二差分输出端口的运算放大器组成，以及设计成从DC偏移电压产生补偿AC信号的开关组件。补偿AC信号通过磁芯方便地耦合到运算放大器。

8. 发明授权

US4309652A Current transforming circuits 失效
标题翻译：电流变换电路
公开(公告)号：US4309652A
公开(公告)日：1982-01-05
申请号：US128300
申请日：1980-03-07
申请人： Teruhiko Ito , Haruo Takahashi
发明人： Teruhiko Ito , Haruo Takahashi
IPC分类号： H01F27/42 , H01F38/32 , H01F40/06
CPC分类号： H01F38/32 , G01R15/183 , H01F27/427
摘要： Current transforming apparatus comprising a current transformer and means for developing a current substantially expressed by a.multidot.I.sub.2, wherein I.sub.2 denotes the secondary current of the current transformer. Impedance means is connected in series to a load of the current transformer and has an impedance (Z.sub.2 +Z.sub.L)/(a-1), wherein Z.sub.2 is the secondary leakage impedance of the current transformer and Z.sub.L is an impedance of the load. A current-voltage converter may be employed as the load of the current transformer.
摘要翻译：电流变换装置包括电流互感器和用于开发基本上由axI2表示的电流的装置，其中I2表示电流互感器的次级电流。阻抗装置与电流互感器的负载串联，具有阻抗（Z2 + ZL）/（a-1），其中Z2是电流互感器的次级漏电阻抗，ZL是负载阻抗。可以采用电流 - 电压转换器作为电流互感器的负载。

9. 发明授权

US4266189A Current measuring apparatus and method 失效
标题翻译：电流测量装置及方法
公开(公告)号：US4266189A
公开(公告)日：1981-05-05
申请号：US709458
申请日：1976-07-28
申请人： Richard A. Karlin , Robert W. McDonald , Gary F. Comiskey
发明人： Richard A. Karlin , Robert W. McDonald , Gary F. Comiskey
IPC分类号： G01R15/20 , G05F1/56 , H01F38/30 , H01F38/32 , H02J7/14 , H02J7/24 , G01R19/00 , G01R1/30 , G01R31/00
CPC分类号： G05F1/56 , G01R15/202 , H01F38/30 , H01F38/32 , H02J7/1461 , H02J7/1492 , H02J7/24 , G01R1/06788 , Y02T10/7005 , Y02T10/92
摘要： The disclosure describes an improved apparatus for measuring the flow of current through a conductor by means of a Hall generator. The Hall generator is biased by a constant current source employing feedback. In order to increase the accuracy of the current measurement, operational amplifiers having inputs which float in relationship to the power supply operating the amplifiers are used to amplify the Hall generator output voltage and to drive a meter. The current measuring apparatus can be used to detect defects in a vehicular alternator by measuring the fluctuating components of the alternator output current. The magnetic field generated by the current to be measured is concentrated in the area of the Hall generator by means of a unique hollow, cylindrical, coiled strip of metal made from nickel, molybdenum and iron. The apparatus includes a regulator in which the voltage drop is so low that a 3.25 volt regulated supply can be maintained from a poorly-charged 6-volt battery.
摘要翻译：本公开描述了一种用于通过霍尔发生器测量通过导体的电流的改进的装置。霍尔发生器由采用反馈的恒定电流源偏置。为了提高电流测量的精度，使用具有与操作放大器的电源相关的输入的运算放大器用于放大霍尔发生器输出电压并驱动电表。电流测量装置可用于通过测量交流发电机输出电流的波动分量来检测车辆交流发电机中的缺陷。由待测量的电流产生的磁场通过由镍，钼和铁制成的独特的中空圆柱形的金属条被集中在霍尔发生器的区域中。该装置包括一个调节器，其中电压降如此低，使得能够从充电不足的6伏电池维持3.25伏的稳压电源。

10. 发明申请

US20220246350A1 Current Transformer with Optic Fiber Mode Electronic Circuit 有权
公开(公告)号：US20220246350A1
公开(公告)日：2022-08-04
申请号：US17441979
申请日：2019-03-22
申请人： Narayan Powertech Pvt. Ltd.
发明人： Sandip Shah
IPC分类号： H01F27/42 , G01R35/02 , H01F38/32 , G01R15/18
摘要： The current transformer system that is the present invention allows for surveillance of an electronic grid at electrical power generating stations, at individual operational substations and in electric power distribution for electric network and grid measurement, protection, and control ranging from very low currents to high current magnitudes. The reception and relay of information from the CT primary circuit is sensed and transmitted by a primary electronic circuitry, digitized, converted to a fiber optic mode, transmitted to a secondary electronic circuit, processed and converted to a digital output and transmitted to various monitoring and recording devices.

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