公开(公告)号：US4214199A

公开(公告)日：1980-07-22

申请号：US881475

申请日：1978-02-27

申请人： Edmond E. Conner ,  Edward C. Wentz

发明人： Edmond E. Conner ,  Edward C. Wentz

IPC分类号： H01F27/38 ,  H01F27/42 ,  H01F38/28 ,  G05F3/00

CPC分类号： H01F38/28 ,  H01F27/38 ,  H01F27/427

摘要： A high-voltage current transformer has an external inductance element electrically connected thereto. The inductance element has a relatively low magnitude of inductance, compared with the inductance of the current transformer, to cause a substantial increase in the excitation current which significantly reduces the residual flux in the current transformer.

摘要翻译： 高压电流互感器具有与其电连接的外部电感元件。 与电流互感器的电感相比，电感元件具有相对较小的电感值，导致励磁电流的显着增加，这显着降低了电流互感器中的剩余通量。

公开(公告)号：US1849845A

公开(公告)日：1932-03-15

申请号：US55955531

申请日：1931-08-26

申请人： GEN ELECTRIC

发明人： MAYO CHARLES G

IPC分类号： H01F38/28

CPC分类号： H01F38/28

公开(公告)号：US1706139A

公开(公告)日：1929-03-19

申请号：US27927728

申请日：1928-05-21

申请人： GEN ELECTRIC

发明人： ARAM BOYAJIAN ,  GUGLIELMO CAMILLI

IPC分类号： H01F27/42 ,  H01F38/28

CPC分类号： H01F27/427 ,  H01F38/28

公开(公告)号：US20240312688A1

公开(公告)日：2024-09-19

申请号：US18183710

申请日：2023-03-14

申请人： Schweitzer Engineering Laboratories, Inc.

发明人： Timothy M. Minteer ,  David Kenny ,  Johnny J. Moore ,  Raymond W. Rice ,  Benjamin T. Rowland ,  Lyssa W. Blood ,  Brett Taggart

IPC分类号： H01F27/06 ,  G01R21/00 ,  H01F27/29 ,  H01F38/28 ,  H02J50/00

CPC分类号： H01F27/06 ,  G01R21/00 ,  H01F27/29 ,  H01F38/28 ,  H02J50/001

摘要： A current transformer (CT) isolation clamp is mounted to a phase conductor and includes a step-down CT transformer and a passive isolation transformer. A three-phase power-harvesting sensor system includes a plurality of CT isolation clamps mounted to phase conductors in a three-phase power system. An electronics module is connected to the CT isolation clamps. The electronics module may include a sensing circuit to determine power characteristics of the three-phase power system based on the outputs of the CT isolation clamps. The electronics module may include a communication subsystem to transmit the determined power characteristics to local or remote devices. Additionally, the electronics module may include a power harvesting circuit to harvest power to operate the sensing circuit and the communication subsystem.

公开(公告)号：US20240145165A1

公开(公告)日：2024-05-02

申请号：US17978085

申请日：2022-10-31

申请人： Arbiter Systems, Inc.

发明人： WILLIAM J. DICKERSON

IPC分类号： H01F38/28 ,  H01F27/28 ,  H01F27/40

CPC分类号： H01F38/28 ,  H01F27/28 ,  H01F27/402

摘要： The present disclosure describes techniques and designs that may be implemented for improving current transformer accuracy (e.g., while reducing additional complexity and costs). In some aspects, described embodiments may implement usage of a current mirror to reduce current transformer error. Additionally or alternatively, some described embodiments may implement Hall-effect sensors (e.g., in place of conventional first stages in a two-stage current transformer design). Such embodiments, as well as other described embodiments, may improve accuracy of current transformers in a more efficient manner (e.g., current transformer accuracy may be improved while reducing or minimizing additional complexity, costs, etc.).

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.

公开(公告)号：US09995772B2

公开(公告)日：2018-06-12

申请号：US14781326

申请日：2014-05-13

申请人： Mitsubishi Electric Corporation

发明人： Hiroaki Kotake ,  Yoshiaki Koizumi ,  Masahiro Ishihara

IPC分类号： G01R15/18 ,  G01R19/00 ,  H01F38/28

CPC分类号： G01R15/181 ,  G01R19/0092 ,  H01F38/28

摘要： This current measurement device includes a conductor, a first terminal block, a pair of detection coils and a current calculator. A magnetic field, proportional to the magnitude of a conducted to-be-measured current, is generated around the conductor. The first terminal block has a placement surface on which the conductor is disposed. The pair of detection coils has the configuration, connected in series and in opposite polarities, and disposed on the placement surface of the first terminal block such that the conductor is between the pair of detection coils, and each coil is spaced from the conductor by an insulating distance. The detection coils output an inductive voltage signal produced by the magnetic field generated by the conductor and an external magnetic field which is magnetic noise. A current calculator calculates the value of the to-be-measured current on the basis of the inductive voltage signals from the pair of detection coils.

公开(公告)号：US20180027692A1

公开(公告)日：2018-01-25

申请号：US15214964

申请日：2016-07-20

申请人： Deere & Company

发明人： Christopher J. Schmit

IPC分类号： H05K7/20 ,  G01R15/18

CPC分类号： H05K7/2039 ,  G01R15/18 ,  G01R15/183 ,  H01F27/08 ,  H01F38/28 ,  H05K7/209

摘要： An electrical assembly includes a heat conducting housing. A conductor is supported by the housing and conducts electrical current. An electrical insulator member surrounds the conductor. A core surrounds the insulator member and the conductor so that current flowing through the conductor induces a magnetic field in the core. A transducer is coupled to the core for generating a signal representing current in the conductor. A thermal interface member engages the core and engages the housing. The interface member conducts or can conduct heat to the housing.

公开(公告)号：US09673694B2

公开(公告)日：2017-06-06

申请号：US14761938

申请日：2014-01-17

申请人： TERA ENERGY SYSTEM SOLUTION CO. LTD.

发明人： Ja-Il Koo

IPC分类号： H02M1/32 ,  H01F38/28 ,  H02M7/06 ,  H02M5/40 ,  H02J5/00 ,  H02M7/08 ,  H02J50/10

CPC分类号： H02M1/32 ,  H01F38/28 ,  H02J5/005 ,  H02J50/10 ,  H02M5/12 ,  H02M5/225 ,  H02M5/40 ,  H02M7/06 ,  H02M7/08 ,  H02M7/4807 ,  H02M2001/325

摘要： Disclosed is an electromagnetic induction type power supply device, which generates electric power through an electromagnetic induction method using a transformer from current flowing through a transmission line, can adjust an output thereof by detecting and feeding back the output, enables a transformer and a power converting unit to be added or removed as necessary. The electromagnetic induction type power supply device includes a transformer module including a plurality of transformers for outputting electric power by inducing, in an electromagnetic induction method, secondary current from primary current flowing through a transmission line; a power source module including a plurality of power converting units for converting the electric power output from the plurality of transformers to direct current power and outputting the converted power; and a power summing unit for summing the direct current power output from the plurality of transformers and providing the summed power to a load.

公开(公告)号：US20160276950A1

公开(公告)日：2016-09-22

申请号：US14760464

申请日：2014-11-19

申请人： TERA ENERGY SYSTEM SOLUTION CO. LTD

发明人： Ja-ll KOO

IPC分类号： H02M5/458

CPC分类号： H02M5/458 ,  H01F38/28 ,  H01F2038/305 ,  H02J50/12

摘要： The present invention relates to a unit current transformer device and a magnetic induction power supplying device, and particularly to a magnetic induction power supply unit capable of linearly adjusting output power according to the number of unit current transformer devices configured to have a specific resonance frequency. To this end, the unit current transformer device includes a current transformer inducing secondary current from primary current flowing through a line in a magnetic induction manner and having a resonant frequency double or greater than that of the primary current, and a converting unit converting an output of the current transformer to DC power.

摘要翻译： 本发明涉及单位电流互感器装置和磁感应供电装置，特别涉及一种能够根据配置为具有特定谐振频率的单位电流互感器装置的数量线性调整输出功率的磁感应电源装置。 为此，单位电流互感器装置包括电流互感器，其感应来自初级电流的二次电流，其以磁感应方式流过线路，并且具有的倍频或大于初级电流的谐振频率;以及转换单元， 的电流互感器直流电。