DC-TO-DC AND AC.

CURRENT TRANSFORMER FOR DIRECT AND ALTERNATING CURRENT

Current transformer for direct and alternating current

CLOSED-LOOP FLUXGATE CURRENT SENSOR

Electrical current sensor comprising a measuring circuit () and an inductor () for measuring a primary current Iflowing in a primary conductor (), the inductor comprising a saturable magnetic core () made of a highly permeable magnetic material and a secondary coil () for carrying an alternating excitation i configured to alternatingly saturate the magnetic core, the coil being connected to the measuring circuit. The measuring circuit is configured to supply a positive or negative voltage to the inductor, to switch off the voltage when a condition signalling saturation is reached, to measure the time to saturation tin one direction and the time to saturation tin the other direction of the magnetic core and determine therefrom a value of the primary current for small current amplitudes, the measuring circuit being further configured for evaluating the average value of the excitation current i and determining therefrom the value of the primary current for large currents. 1. Electrical current sensor comprising a measuring circuit (e) and an inductor for measuring a primary current Iflowing in a primary conductor over a current range from a minimum specified current amplitude to a maximum specified current amplitude , the inductor comprising a saturable magnetic core made of a highly permeable magnetic material and a secondary coil for carrying an alternating excitation i configured to alternatingly saturate the magnetic core , the coil being connected to the measuring circuit , wherein the measuring circuit is configured to supply a positive or negative voltage to the inductor , to switch off the voltage when a condition signalling saturation is reached , to measure the time to saturation tin one direction and the time to saturation tin the other direction of the magnetic core and determine therefrom a value of the primary current for primary currents having an amplitude in a first portion of the current range from the minimum specified current to a transition ...

Mixed mode fluxgate current transducer

Electrical current transducer comprising a measuring circuit ( 6 ) and an inductor ( 4 ) for measuring a primary current I P flowing in a primary conductor ( 2 ), the inductor comprising a saturable magnetic core ( 10 ) made of a highly permeable magnetic material and a secondary coil ( 12 ) for carrying an alternating excitation i configured to alternatingly saturate the magnetic core, the coil being connected to the measuring circuit. The measuring circuit is configured to measure a mean value of the excitation current in the secondary coil and determine therefrom a value of the primary current for small current amplitudes, the measuring circuit being further configured for evaluating the frequency of the excitation current i and determining therefrom the value of the primary current for large currents.

AUTONOMOUSLY CALIBRATED MAGNETIC FIELD SENSOR

Magnetic field sensor including a magnetic field sensing circuit () comprising a reference magnetic field generator () and a magnetic field sensing cell (), and a signal processing circuit () connected to the output of the magnetic field sensing cell and comprising a demodulator circuit and a gain correction feedback circuit () for correcting error fluctuations in the transfer characteristic of the magnetic field sensor. The sensor further comprises a reference current generator () configured to generate a reference current I ref, the reference current generator connected to the magnetic field sensing circuit () configured for generating the reference magnetic field B ref and to the gain correction feedback circuit configured for providing a reference signal (y) to which an output signal of the demodulator circuit may be compared. 112-. (canceled)13. Magnetic field sensor including a magnetic field sensing circuit comprising a reference magnetic field generator and a magnetic field sensing cell , and a signal processing circuit connected to the output of the magnetic field sensing cell and comprising a gain correction feedback circuit for correcting fluctuations in the transfer characteristic of the magnetic field sensor , characterized in that the sensor further comprises a reference current generator configured to generate a reference current I , the reference current generator connected to the magnetic field sensing circuit configured for generating the reference magnetic field Band to the gain correction feedback circuit configured for providing a reference signal yto which an output signal of the demodulator circuit may be compared.14. Sensor according to claim 13 , wherein the reference current generator is connected to a reference coil of the reference magnetic field generator via a current mirror circuit configured to copy the reference current Iand to generate a second reference current Ithat drives the coil to generate the reference magnetic field B.15. ...

HALL SENSOR SYSTEM

Integrated circuit Hall sensor system comprising a plurality of elementary blocks (EB), each elementary block including a Hall cell (), a differential pair () of an input stage of a Differential Difference Amplifier (DDA), and terminals (), wherein the terminals () are placed laterally on opposing outer sides of each elementary block parallel to a Y axis and the plurality of elementary blocks are arranged in a juxtaposed manner to form at least one row () extending along an X axis orthogonal to the Y axis and interconnected by the terminals. 114-. (canceled)15. Integrated circuit Hall sensor system comprising a plurality of elementary blocks (EB) , each elementary block including a Hall cell , a switch box connected to the Hall cell , an input stage of an amplifier , and terminals , wherein the terminals are placed laterally on opposing outer sides of each elementary block parallel to a Y axis and the plurality of elementary blocks are arranged in a juxtaposed manner to form at least one row extending along an X axis orthogonal to the Y axis and interconnected by the terminals.16. Integrated circuit Hall sensor system according to claim 15 , wherein said switch box connected to the Hall cell is a four phase switch box.17. Integrated circuit Hall sensor system according to claim 15 , wherein each row of elementary blocks is terminated by a second stage of said amplifier claim 15 , forming a front-end channel.18. Integrated circuit Hall sensor system according to claim 17 , wherein each channel comprises a logic circuit connected through connections (A claim 17 , B claim 17 , C claim 17 , D) of the elementary blocks configured to deliver logic signals to a four phase current switch box of each elementary block connected to the Hall cell to perform four-phase spinning current on each Hall cell.19. Integrated circuit Hall sensor system according to claim 17 , wherein each channel comprises a demodulator based on a switched-capacitor circuit.20. Integrated circuit Hall ...

TOROIDAL FLUXGATE CURRENT TRANSDUCER

Toroidal fluxgate current transducer comprising a ring shaped fluxgate sensing unit () comprising a ring-shaped support (), a saturable magnetic core () mounted on the support (), an excitation coil () wound around the support and saturable core and a magnetic shell () mounted around the excitation coil, ring-shaped support and saturable core. The support is ringed-shape and comprises terminals () fixed to the support, a first pair of said terminals connected to ends of the excitation coil, and a second pair of said terminals connected to ends of a secondary coil of the current transducer. 115-. (canceled)16. Toroidal fluxgate current transducer comprising a ring shaped fluxgate sensing unit comprising a secondary coil made of a conducting wire , a ring-shaped dielectric support , a saturable magnetic core mounted on the support , an excitation coil made of a conducting wire wound around the support and saturable core , and a magnetic shell mounted around the excitation coil , ring-shaped support and saturable core , wherein the support comprises terminals fixed to the support , a first pair of said terminals connected to ends of the excitation coil , and a second pair of said terminals connected to ends of the secondary coil of the current transducer.17. Transducer according to claim 16 , further comprising a circuit board connected to said terminals of the sensing unit.18. Transducer according to claim 16 , wherein the sensing unit further comprises dielectric housing shells mounted around the excitation coil and saturable core and forming a support around which the secondary coil is wound.19. Transducer according to claim 18 , wherein the dielectric housing shells comprise a plurality of spaced apart radial fins.20. Transducer according to claim 18 , wherein the dielectric shell comprises protuberances engaging in complementary orifices in a circuit board of the transducer.21. Transducer according to claim 16 , wherein the ring-shaped dielectric support of the ...

CLOSED-LOOP CURRENT TRANSDUCER WITH SWITCHED MODE AMPLIFIER

A closed-loop current transducer for measuring a current (Ip) flowing in a primary conductor (), the transducer powered by series connected voltage supplies (V_H, V_L) and comprising a magnetic field detector (WS), a signal processing circuit including an amplifier circuit ( ) connected to the magnetic field detector, and a compensation winding (WS) connected to the amplifier circuit and configured to generate an opposing magnetic field seeking to cancel a magnetic field generated by the current flowing in the primary conductor. The amplifier circuit comprises a first switched mode power stage configured to drive the magnetic field generator, and a second switched mode power stage () configured to balance the currents of the voltage supplies. 122. A closed-loop current transducer system for measuring a current (Ip) flowing in a primary conductor , the system powered by series connected voltage supplies (V_H , V_L) and comprising a magnetic field detector , a signal processing circuit including an amplifier circuit connected to the magnetic field detector , and a compensation coil connected to the amplifier circuit and configured to generate an opposing magnetic field seeking to cancel a magnetic field generated by the current flowing in the primary conductor , characterised in that the amplifier circuit comprises a first switched mode power stage fed by the voltage supplies (V_H , V_L) and configured to drive the compensation coil and supply an output current (Is) for a measurement resistor (Rm) connected to a first reference voltage (Vref) , where the voltage across the measurement resistor provides an image of the current flowing in the primary conductor , and at least a second independently regulated switched mode power stage fed by the voltage supplies (V_H , V_L) with an output connected to a second reference voltage (Vref) through an inductor (L) and configured to output a balancing current (Ibal) , whereby the first and second reference voltages may be the ...

Magnetic field sensor arrangement and current transducer therewith

Magnetic field sensor arrangement for positioning in a gap formed between end faces ( 12 ) of a magnetic core ( 4 ), comprising a magnetic field detector ( 5 ), a housing ( 10 ), and a grounding device ( 8 ), the magnetic field sensor and grounding device being mounted to the housing. The grounding device comprises at least one contact ( 20 ) elastically supported and configured for electrical contact with the magnetic core. The elastically supported contact is mounted adjacent a sensing portion of the magnetic field sensor and configured for insertion in the magnetic circuit core gap such that the contact elastically biases against the end face of the magnetic core.

CURRENT TRANSDUCER

Electrical current transducer for measuring an electric current in a primary conductor, including a housing (), a magnetic core () surrounding a central aperture () through which the primary conductor extends, and a magnetic field sensing device () comprising connection terminals (). The housing comprises a magnetic core receiving cavity () in which the magnetic core is lodged and a connecting interface portion () in which the magnetic field sensing is lodged, the connecting interface projecting outwardly from the magnetic core receiving cavity and comprising latching elements complementary to latching elements of a separate connector interface element () selectively mountable to the connecting interface portion. The connector interface element comprises a connector shroud () forming with the connection terminals a pluggable connector interface for pluggable connection to an external pluggable connector, the current transducer adapted for mounting on an external circuit board without connector shroud. 117-. (canceled)18. An electrical current transducer for measuring an electric current in a primary conductor , including a housing , a magnetic core surrounding a central aperture through which the primary conductor extends , and a magnetic field sensing device comprising connection terminals , the housing comprising a magnetic core receiving cavity in which the magnetic core is lodged and a connecting interface portion in which the magnetic field sensing is lodged , the connecting interface projecting outwardly from the magnetic core receiving cavity and comprising latching elements complementary to latching elements of a separate connector interface element selectively mountable to the connecting interface portion , the connector interface element comprising a connector shroud forming with the connection terminals a pluggable connector interface for pluggable connection to an external pluggable connector , the current transducer adaptable without connector shroud ...

ELECTRICAL CURRENT TRANSDUCER

A current transducer including a housing comprising an outer casing, a magnetic circuit core configured to encircle at least one primary conductor, and a magnetic field detector positioned in a magnetic circuit gap of the magnetic circuit core. The housing further includes an inner support part comprising a main body portion and a magnetic core support portion. The magnetic circuit core is in the form of a thin strip of amorphous material supported on the main body portion and magnetic core support portion, the magnetic circuit gap being formed between overlapping ends of the strip. 115-. (canceled)16. A current transducer including a housing comprising an outer casing , a magnetic circuit core configured to encircle at least one primary conductor , and a magnetic field detector positioned in a magnetic circuit gap of the magnetic circuit core , wherein the housing further includes an inner support part comprising a main body portion and a magnetic core support portion and the magnetic circuit core is in the form of at least one strip of amorphous material with a magnetic reluctance smaller than the reluctance of the airgap and having a thickness less than 0.1 mm supported on the main body portion and magnetic core support portion , the magnetic circuit gap being formed between overlapping ends of the strip.17. The transducer according to claim 16 , wherein the main body portion and the magnetic core support portion are connected via hinge portions configured to allow the magnetic core support portion to wrap around the main body portion.18. The transducer according to claim 17 , wherein the hinge portions are flexible webs integrally formed with the main body portion and magnetic core support portion.19. The transducer according to claim 16 , including a primary circuit unit comprising a first circuit board lodged in the main body portion of the inner support part and at least one conductive trace on the circuit board constituting a portion of the at least one ...

MAGNETIC FIELD SENSOR ON INTEGRATED CIRCUIT

A magnetic field sensor comprises a signal conditioning IC and a magnetic field sensor IC, the magnetic field sensor IC being mounted on and connected to the signal conditioning IC. The magnetic field sensor IC comprises a semi-conductor substrate with a sensor active layer disposed an outer facing side of the magnetic field sensor opposite the signal conditioning IC. The sensor active layer is connected to conductive vias that extend through the semi-conductor substrate from said outer facing side to an underside facing the signal conditioning IC, an underside of the conductive via being electrically interconnected to a connection pad on the signal conditioning IC via a chip-on-chip interconnection comprising a conductive bead connection and a solder connection. 113.-. (canceled)14. A magnetic field sensor comprising a signal conditioning IC and a magnetic field sensor IC , the magnetic field sensor IC mounted on and connected to the signal conditioning IC , the magnetic field sensor IC comprising a semi-conductor substrate with a sensor active layer disposed an outer facing side of the magnetic field sensor opposite the signal conditioning IC , the sensor active layer connected to conductive vias that extend through the semi-conductor substrate from said outer facing side to an underside facing the signal conditioning IC , an underside of the conductive via being electrically interconnected to a connection pad on the signal conditioning IC via a chip-on-chip interconnection.15. Magnetic field sensor according to claim 14 , wherein the chip-on-chip interconnection comprises a bead connection.16. Magnetic field sensor according to claim 14 , wherein the chip-on-chip interconnection comprises a solder connection.17. Magnetic field sensor according to claim 14 , wherein the sensor active layer comprises a Hall effect sensor element or other form of magneto-resistive sensor element sensitive to a magnetic field.18. Magnetic field sensor according to claim 14 , wherein ...

Current transducer with magnetic field detector module

An electrical current transducer including a magnetic core and a magnetic field detector module, the magnetic core and magnetic field detector module each forming a single unit separably mountable around a primary conductor and to a circuit board, the magnetic core having a general U shape including an end branch and lateral branches extending the end branch to respective free ends, the magnetic field detector module being positioned between the lateral branches and extending across a whole width of a gap formed between the lateral branches. The magnetic field detector module includes at least one magnetic field sensing cell, a pair of magnetic concentrators arranged in mirror opposition forming a magnetic field gap therebetween in which the at least one sensing cell is positioned, and an insulating body supporting the magnetic concentrators and at least one sensing cell.

ELECTRICAL CURRENT TRANSDUCER WITH ELECTROSTATIC SHIELD

Electrical current transducer to measure the current flowing in a primary conductor, the transducer including an outer casing, a magnetic core comprising a magnetic circuit gap, a magnetic field detector comprising a sensing portion positioned in the magnetic circuit gap, an insulating core housing, a secondary coil formed from a wire wound around a coil support portion of the insulating core housing, and an electrostatic shield. The electrostatic shield is positioned between secondary coil and a radially inner wall portion of the outer casing, the radially inner wall portion defining a passage configured to receive said primary conductor therethrough. The electrostatic shield comprises a skirt portion formed by a plurality of flexible strips extending axially from an edge of the shield, the flexible strips configured to elastically bias against a base wall portion of the outer casing. 1. Electrical current transducer to measure the current flowing in a primary conductor , the transducer including an outer casing , a magnetic core comprising a magnetic circuit gap , a magnetic field detector comprising a sensing portion positioned in the magnetic circuit gap , an insulating core housing , a secondary coil formed from a wire wound around a coil support portion of the insulating core housing , and an electrostatic shield positioned between secondary coil and a radially inner wall portion of the outer casing , the radially inner wall portion defining a passage configured to receive the primary conductor therethrough , wherein the electrostatic shield comprises a skirt portion formed by a plurality of flexible strips extending axially from an edge of the shield , the flexible strips configured to elastically bias against a base wall portion of the outer casing.2. Current transducer according to claim 1 , wherein the strips are separated by slits claim 1 , and wherein juxtaposed strips and slits are substantially evenly distributed around a circumference of the shield.3. ...

ELECTRICAL CURRENT TRANSDUCER

Electrical current transducer including a magnetic core comprising a magnetic circuit gap, a magnetic field detector comprising a sensing portion positioned in the magnetic circuit gap, an insulating support body comprising a coil support portion and a coil terminal connection portion, and a secondary coil formed from a wire wound around the coil support portion. The coil support portion has a generally U-shaped cross-sectional profile comprising a base wall, a radially inner wall extending from the base wall and a radially outer wall extending from the base wall, the radially inner and outer walls having a height configured such that open end edges thereof extend slightly beyond an axial thickness of the magnetic core including any manufacturing tolerances such that the open end edges are folded inwards around corners of the magnetic core by the coil wound around the magnetic core housing. 1. Electrical current transducer including a magnetic core comprising a magnetic circuit gap , a magnetic field detector comprising a sensing portion positioned in the magnetic circuit gap , an insulating support body comprising a coil support portion and a coil terminal connection portion , and a secondary coil formed from a wire wound around the coil support portion , wherein the coil support portion has a generally U-shaped cross-sectional profile comprising a base wall , a radially inner wall extending from the base wall and a radially outer wall extending from the base wall , the radially inner and outer walls having a height configured such that open end edges thereof extend slightly beyond an axial thickness of the magnetic core including any manufacturing tolerances such that the open end edges are folded inwards around corners of the magnetic core by the coil wound around the magnetic core housing.2. Current transducer according to claim 1 , wherein the coil support portion comprises core latching elements in the form of latching shoulders configured to allow the core to ...

ROGOWSKI CURRENT TRANSDUCER

A current transducer including a Rogowski cable extending between a free end and a signal output connection end, a signal output cable connected to the signal output connection end of the Rogowski cable, and a connector comprising an electrically conductive magnetic core having a first cable end lodging cavity receiving the signal output connection end of the Rogowski cable therein, and a second cable end lodging cavity receiving the free end of the Rogowski cable therein, the Rogowski cable comprising an outer shielding layer connected to a conductor of the signal output cable configured for a ground connection. The current transducer further comprises a conductive grounding connection establishing an electrical contact between the magnetic core and the shielding conductor of the Rogowski cable. 114.-. (canceled)15. A current transducer including a Rogowski cable extending between a free end and a signal output connection end , a signal output cable connected to the signal output connection end of the Rogowski cable , and a connector comprising an electrically conductive magnetic core having a first cable end lodging cavity receiving the signal output connection end of the Rogowski cable therein , and a second cable end lodging cavity receiving the free end of the Rogowski cable therein , the Rogowski cable comprising an outer shielding layer connected to a conductor of the signal output cable configured for a ground connection , wherein the current transducer further comprises a conductive grounding connection establishing an electrical contact between the magnetic core and the shielding conductor of the Rogowski cable.16. The current transducer according to claim 15 , wherein the magnetic core is made of a ferrite material.17. The current transducer according to claim 15 , wherein the Rogowski cable comprises an inner conductor surrounded by an outer conductor wound around a dielectric layer to form a Rogowski coil claim 15 , the Rogowski coil further comprising ...

ELECTRICAL CURRENT SENSOR WITH GROUNDED MAGNETIC CORE

An electrical current transducer comprising a housing, at least one magnetic core comprising an air gap and defining a central passage configured to receive a primary conductor carrying a primary current to be measured through the central passage, a magnetic field detector positioned at least partially in the air gap, and a grounding element. A lateral surface of the magnetic core is positioned against the grounding element without direct fixed attachment between the magnetic core and the grounding element, and the grounding element overlaps the magnetic core to an extent configured to ensure that a capacitive coupling (C3) between the magnetic core and the grounding element is greater than a capacitive coupling (C2) between the magnetic core and the magnetic field detector.

CURRENT TRANSDUCER WITH FLUXGATE DETECTOR

Electrical current transducer () of a closed-loop type for measuring a primary current (I) flowing in a primary conductor (), comprising a fluxgate measuring head () and an electronic circuit () including a microprocessor () for digital signal processing. The measuring head includes a secondary coil () and a fluxgate detector () comprising an excitation coil and a magnetic material core. The electronic circuit comprises an excitation coil drive circuit () configured to generate an alternating excitation voltage to supply the excitation coil with an alternating excitation current (I), the secondary coil () connected in a feedback loop () of the electronic circuit to the excitation coil drive circuit (), the electronic circuit further comprising a ripple compensation circuit () configured to compensate for a ripple signal generated by the alternating excitation voltage. 114-. (canceled)1516. Electrical current transducer of a closed-loop type for measuring a primary current (IP) flowing in a primary conductor , comprising a fluxgate measuring head and an electronic circuit () including a microprocessor for digital signal processing , the measuring head including a secondary coil , a fluxgate detector comprising an excitation coil and a magnetic material core , and optionally a magnetic shield surrounding the fluxgate detector , the electronic circuit comprising an excitation coil drive circuit configured to generate an alternating excitation voltage to supply the excitation coil with an alternating excitation current (I) , the secondary coil connected in a feedback loop of the electronic circuit to the excitation coil drive circuit , wherein the electronic circuit further comprises a ripple compensation circuit configured to compensate for a ripple signal generated by the alternating excitation voltage by injecting a ripple compensation signal into a coil of the measuring head.161. Current transducer according to claim , wherein the measuring head comprises a ...

CLIP-ON CURRENT TRANSDUCER OR CURRENT TRANSFORMER

Electrical current transducer for mounting around an electrical primary conductor carrying a current to be measured, comprising a primary conductor receiving aperture (), a housing (), a magnetic core () mounted in the housing, and a secondary coil () wound around a branch of the magnetic core. The housing comprises a major portion () and a minor portion (), the major portion being separable from the minor portion and configured to be mounted and locked around the primary conductor, the housing major and minor portions joinable together at joining faces (). The magnetic core comprises a major portion () mountable in a core receiving cavity () of the housing major portion (), and a minor portion () mountable in a core receiving cavity () of the housing minor portion (). The housing further comprises an electrical component support body () comprising a coil support portion () around which the secondary coil is mounted, the secondary coil and coil support portion being received in a first branch receiving portion () of the core receiving cavity of the housing major portion (), the coil support portion comprising a core receiving cavity () comprising a first branch receiving portion () receiving a first branch () of the magnetic core major portion () therein, a longitudinal axis (A) of the magnetic core first branch () being in a transverse direction to the general direction of the joining faces (). 113-. (canceled)14. Electrical current transducer for mounting around an electrical primary conductor carrying a current to be measured , comprising a primary conductor receiving aperture , a housing , a magnetic core mounted in the housing , and a secondary coil wound around a branch of the magnetic core , the housing comprising a major portion and a minor portion , the major portion being separable from the minor portion and configured to be mounted and locked around the primary conductor , wherein the housing in a closed position has a primary conductor aperture extending ...

Electrical current transducer

A closed-loop current transducer comprising a magnetic circuit core made of a material with a low magnetic reluctance to conduct magnetic flux and concentrate a magnetic field, a magnetic field detector positioned in a magnetic circuit gap of the magnetic circuit core, and a compensation coil assembly comprising a compensation coil and a compensation coil support comprising a coil support bobbin, the compensation coil being wound around the coil support bobbin. The magnetic circuit comprises a first longitudinal branch, a second longitudinal branch, and first and second end branches interconnecting the first and second longitudinal branches such that the branches surround a central opening configured to receive one or more primary conductors therethrough, the magnetic circuit being formed of first and second parts assembled together from opposed ends of the compensation coil support.

CURRENT TRANSDUCER WITH INTEGRATED PRIMARY CONDUCTOR

Electrical current transducer including a housing (), a magnetic core () comprising a central passage () and a magnetic circuit gap (), a magnetic field detector () positioned in the magnetic circuit gap, and a leadframe conductor arrangement () comprising a primary conductor () for carrying the current to be measured and magnetic field detector conductors () for connecting the magnetic field detector to an external circuit. The primary conductor comprises a central portion () extending through the central passage of the magnetic core, lateral extension arms () extending from opposite ends of the central portion, and connection ends () for connection to an external conductor. The magnetic field detector conductors comprise a plurality of conductors, each conductor comprising a sensing cell connection pad () substantially aligned with the central portion of the primary conductor and a connection end () for connection to the external circuit, the housing comprising a base () surrounding portions of the leadframe conductor arrangement and forming a magnetic field sensor receiving cavity (), a bottom surface of the magnetic field sensor receiving cavity presenting an essentially planar mounting surface exposing said sensing cell connection pads for electrical connection to the sensing cell, the sensing cell bonded on the mounting surface overlapping conductors of the magnetic field detector conductors and offset from the primary conductor central portion. The housing base further comprises a primary conductor overmold portion () that surrounds the central portion of the primary conductor providing a dielectric insulating layer between the magnetic core and the primary conductor. 113-. (canceled)14. An electrical current transducer including a housing , a magnetic core comprising a central passage and a magnetic circuit gap , a magnetic field detector comprising a sensing cell positioned in the magnetic circuit gap , and a sheet metal leadframe conductor arrangement ...

Current transducer with integrated primary conductor bar

An electrical current transducer is disclosed including a primary conductor bar for carrying the current to be measured, a magnetic core comprising a magnetic circuit gap, a magnetic field sensor having a circuit board and a magnetic field detector positioned in the magnetic circuit gap, and an insulating housing surrounding the magnetic core and magnetic field sensor. The primary conductor bar has connection terminal ends extending outside of the housing configured for connection to an external primary conductor. The primary conductor bar further includes a core passage section having a reduced width in comparison to the connection terminal ends extending outside of the housing thereby providing an indent within which the magnetic field detector is positioned such that a central passage of the magnetic core has a width less than the width of the primary conductor connection ends. The insulating housing comprises a main housing portion overmolded around the core passage section of the primary conductor bar, the main housing portion comprising a magnetic field sensor receiving slot configured to allow slideable insertion of the magnetic field sensor into the primary conductor bar indent for positioning in the magnetic circuit gap.

CURRENT TRANSDUCER WITH INTEGRATED PRIMARY CONDUCTOR BAR

An electrical current transducer is disclosed which includes a primary conductor bar for carrying the current to be measured, a magnetic core having a magnetic circuit gap, a magnetic field sensor having a magnetic field detector positioned in the magnetic circuit gap, and an insulating housing surrounding the magnetic core and magnetic field sensor. The primary conductor bar has connection terminal ends extending outside of the housing configured for connection to an external primary conductor. The primary conductor bar has a core passage section comprising a fuse portion configured for interruption of the primary conductor if a predefined electrical current is exceeded. The core passage section has a reduced width (W) in comparison to the connection terminal ends extending outside of the housing thereby providing indents within which at least a portion of the magnetic core is positioned such that a central passage of the magnetic core has a width (W) less than the width (W) of the primary conductor connection ends. 132. Electrical current transducer including a primary conductor bar for carrying the current to be measured , a magnetic core comprising a magnetic circuit gap , a magnetic field sensor comprising a magnetic field detector positioned in the magnetic circuit gap , and an insulating housing surrounding the magnetic core and magnetic field sensor , the primary conductor bar comprising connection terminal ends extending outside of the housing configured for connection to an external primary conductor , wherein the primary conductor bar comprises a core passage section comprising a fuse portion configured for interruption of the primary conductor if a predefined electrical current is exceeded , the core passage section having a reduced width (WI) in comparison to the connection terminal ends extending outside of the housing thereby providing indents within which at least a portion of the magnetic core is positioned such that a central passage of the ...

Toroidal fluxgate current transducer

Closed loop current transducer includes a fluxgate sensing unit, a compensation coil wound around the fluxgate sensing unit, and a transducer housing mounted around the compensation coil, the fluxgate sensing unit comprising a fluxgate housing, a ring-shaped fluxgate magnetic field detector mounted in the fluxgate housing, and a magnetic shield mounted in the fluxgate housing, the magnetic shield surrounding the fluxgate magnetic field detector. The fluxgate housing includes first and second central parts, each central part comprising a radially inner side wall, a radially outer side wall and a base wall joining the inner side wall to the outer side wall, a sensor housing portion being formed on one side of the base wall and receiving the fluxgate magnetic field detector therein.

ELECTRICAL CURRENT TRANSDUCER

Fluxgate based current transducer for measuring a primary current flowing in a primary conductor, comprising a fluxgate magnetic field detector and a measuring circuit. The fluxgate magnetic field detector includes an excitation coil driven by an oscillating excitation current (I) supplied by the measuring circuit. The measuring circuit is configured to provide a first and a second measurement output of the oscillating excitation current. The transducer further comprises a signal output processing unit for comparing in real-time the first and second measurements outputs, wherein the signal output processing unit is configured to send an error signal output if the difference between said first and second measurements outputs exceeds a tolerance value. 113-. (canceled)14. Fluxgate based current transducer for measuring a primary current comprising a fluxgate magnetic field detector , a measuring circuit , and a signal output processing unit , the fluxgate magnetic field detector including an excitation coil driven by an oscillating excitation current (I) supplied by the measuring circuit , wherein the measuring circuit is configured to provide at least two different measurement signals of the primary current (I) , including a first measurement signal obtained through a first measurement signal path and a second measurement signal obtained through a second measurement signal path , the first and second measurement signal paths connected to the signal processing unit configured to compare in real time the first and second measurement signals and to output an error signal if the difference between said first and second measurement signals exceeds a predefined tolerance value.15. The transducer according to claim 14 , wherein the measuring circuit includes a first measurement circuit portion configured to generate claim 14 , at a first measurement signal output of the first measurement circuit portion claim 14 , the first measurement signal in the form of a pulse width ...

Continuously calibrated magnetic field sensor

A magnetic field sensor comprises a reference magnetic field generator (8), a magnetic field sensing cell (6) including Hall effect sensing elements (12), and a signal processing circuit (4) connected to the output (11) of the magnetic field sensing cell and comprising one or more feedback lines (27, 28) for correcting error fluctuations in the transfer characteristic of the magnetic field sensor. The reference magnetic field generator is adapted to generate a frequency modulated reference magnetic field. The signal processing circuit further includes a modulator connected to the magnetic field sensing cell, adapted to modulate the output signal thereof at a frequency different from the modulation frequency of the reference magnetic field generator.

Continuosly Calibrated Magnetic Field Sensor

A magnetic field sensor comprises a reference magnetic field generator ( 8 ), a magnetic field sensing cell ( 6 ) including Hall effect sensing elements ( 12 ), and a signal processing circuit ( 4 ) connected to the output ( 11 ) of the magnetic field sensing cell and comprising one or more feedback lines ( 27, 28 ) for correcting error fluctuations in the transfer characteristic of the magnetic field sensor. The reference magnetic field generator is adapted to generate a frequency modulated reference magnetic field. The signal processing circuit further includes a modulator connected to the magnetic field sensing cell, adapted to modulate the output signal thereof at a frequency different from the modulation frequency of the reference magnetic field generator.

连续校准的磁场传感器

一种磁场传感器，包括：基准磁场发生器(8)；包含霍尔效应敏感元件(12)的磁场敏感单元(6)；和与磁场敏感单元输出(11)连接并且包括用于校正磁场传感器传输特性中误差波动的一个或更多个反馈线路(27、28)的信号处理电路(4)。基准磁场发生器适用于产生频率调制的基准磁场。信号处理电路进一步包括与磁场敏感单元连接的、适用于以与基准磁场发生器调制频率不同的频率来调制其输出信号的调制器。

Continuously calibrated magnetic field sensor

A magnetic field sensor comprises a reference magnetic field generator ( 8 ), a magnetic field sensing cell ( 6 ) including Hall effect sensing elements ( 12 ), and a signal processing circuit ( 4 ) connected to the output ( 11 ) of the magnetic field sensing cell and comprising one or more feedback lines ( 27, 28 ) for correcting error fluctuations in the transfer characteristic of the magnetic field sensor. The reference magnetic field generator is adapted to generate a frequency modulated reference magnetic field. The signal processing circuit further includes a modulator connected to the magnetic field sensing cell, adapted to modulate the output signal thereof at a frequency different from the modulation frequency of the reference magnetic field generator.

连续校准的磁场传感器

一种磁场传感器，包括：基准磁场发生器(8)；包含霍尔效应敏感元件(12)的磁场敏感单元(6)；和与磁场敏感单元输出(11)连接并且包括用于校正磁场传感器传输特性中误差波动的一个或更多个反馈线路(27、28)的信号处理电路(4)。基准磁场发生器适用于产生频率调制的基准磁场。信号处理电路进一步包括与磁场敏感单元连接的、适用于以与基准磁场发生器调制频率不同的频率来调制其输出信号的调制器。

自主校准的磁场传感器

本公开涉及自主校准的磁场传感器。一种磁场传感器，包括磁场感测电路（2），该磁场感测电路包括基准磁场发生器（8）和磁场感测单元（6），并且所述磁场传感器还包括信号处理电路（4），该信号处理电路连接到所述磁场感测单元的输出端并且包括用于校正所述磁场传感器的传输特性中的误差波动的增益校正反馈电路（30，28，47）。所述传感器进一步包括基准电流发生器（3）。所述基准电流发生器配置为生成基准电流I ref ，所述基准电流发生器连接到配置为生成基准磁场B ref 的所述磁场感测电路（2），并且所述基准电流发生器连接到配置为提供基准信号（y ref ）的增益校正反馈电路，所述解调器电路的输出信号可以与所述基准信号比较。

Current transducer with magnetic field gradient sensor

电流换能器包括初级导体的区段(2)和安装在初级导体附近的磁场梯度传感器(4)，磁场梯度传感器(4)被配置为测量横向于在初级导体中流动的初级电流(I P )的流动方向(Z)的梯度测量方向(Y)上的磁场梯度。电流换能器还包括安装成与初级导体的第一外侧相邻的第一侧向磁垫片(6a)，以及安装成与初级导体的第二外侧相邻的第二侧向磁垫片(6b)，第一磁垫片和第二磁垫片的主要内表面(10)面向磁场梯度传感器并且基本上平行于初级电流的流动方向(Z)延伸。

Device with wide passband for measuring electric current intensity in a conductor

The current to be measured (I) passes in a conductor ( 1 ) enclosed with a Rogowski coil ( 4 ) and in the proximity thereof are arranged several magnetic field detectors ( 3 ). The sum of the signals from these detectors, formed in the device ( 2 ), and the signal supplied by the Rogowski coil are applied to a signal processor ( 7 ). The processor ( 7 ) comprises, for example, a first order delay device connected to the Rogowski coil output and means for amplifying/reducing the signals followed by adding means, the delay time constant and the amplifying/reducing factors being selected so that the device output ( 8 ) signal is proportional to the intensity of the current to be measured in a very wide frequency range, i.e. from 0 to more than 10 MHz.

Current converter with magnetic field gradient sensor

【課題】正確で、信頼性があり、測定範囲が広い、導体を流れる電流を測定するための電流変換器を提供すること。 【解決手段】一次導体のセクションと、一次導体を流れる一次電流の流れの方向（Ｚ）を横切る勾配測定方向（Ｙ）における磁場勾配を測定するように構成された、一次導体の近傍に取り付けられた磁場勾配センサと、を含む、電流変換器。電流変換器は、一次導体の第１の外側面に隣接して取り付けられた第１の横方向磁気シム（６ａ）と、一次導体の第２の外側面に隣接して取り付けられた第２の横方向磁気シム（６ｂ）と、磁場勾配センサに面し、一次電流の流れの方向（Ｚ）に本質的に平行に延びる、第１および第２の磁気シムの主内部表面と、をさらに含む。 【選択図】図５ｂ

ELECTRIC CURRENT SENSOR DEVICE

Le présent dispositif capteur comporte un circuit magnétique 1 couplé avec un conducteur primaire 3 et avec au moins une bobine de mesure 4 alimentée par un courant de mesure, de façon à compenser le champ magnétique créé par le courant primaire. Le circuit magnétique présente au moins un entrefer 2 avec une sonde de Hall 5 pour détecter la compensation des champs. Selon l'invention, une pièce d'armature 6 est disposée au voisinage de l'entrefer, à l'intérieur de la bobine de mesure, de façon à former un shunt magnétique. Ceci permet d'améliorer considérablement la précision de la mesure, et notamment la fidélité de la reproduction des composantes à fréquence élevée du courant primaire. L'invention s'applique à la mesure et à la production d'une image de courants à forte intensité. The present sensor device comprises a magnetic circuit 1 coupled with a primary conductor 3 and with at least one measuring coil 4 supplied with a measuring current, so as to compensate for the magnetic field created by the primary current. The magnetic circuit has at least one air gap 2 with a Hall probe 5 to detect the compensation of the fields. According to the invention, an armature part 6 is placed in the vicinity of the air gap, inside the measuring coil, so as to form a magnetic shunt. This makes it possible to considerably improve the precision of the measurement, and in particular the fidelity of the reproduction of the high frequency components of the primary current. The invention applies to the measurement and the production of an image of high intensity currents.

ELECTRIC CURRENT SENSOR DEVICE

ELECTRIC CURRENT SENSOR DEVICE

ELECTRIC CURRENT SENSOR

ELECTRICAL CURRENT SENSOR

Le présent dispositif comporte un circuit magnétique 1 couplé avec un conducteur primaire 12 qui comprend plusieurs portions de conducteur en forme de U. Ces portions de conducteur sont connectées, par exemple, à un circuit imprimé comportant des éléments conducteurs 19, 20 disposés de façon à réaliser un enroulement primaire ayant un nombre de spires choisi. L'invention s'applique notamment aux capteurs de courant fabriqués en série, de façon essentiellement automatique, et permet une simplification importante de la fabrication ainsi qu'une flexibilité appréciable dans la distribution et l'utilisation de ces capteurs. The present device comprises a magnetic circuit 1 coupled with a primary conductor 12 which comprises several U-shaped conductor portions. These conductor portions are connected, for example, to a printed circuit comprising conductive elements 19, 20 arranged so as to making a primary winding having a selected number of turns. The invention applies in particular to current sensors produced in series, essentially automatically, and allows a significant simplification of the manufacture as well as an appreciable flexibility in the distribution and use of these sensors.

Remote monitoring system

The invention relates to an electroacoustic detector using sound for location and reconnaissance by evaluating the spectrum of any sound source originating from a fixed point or from a moving object. The device comprises four main components: stereophonic headphones 1, an artificial microphone head 2, an amplifier 3 with its filters and an electronic direction finder 4. The system may be installed in a fixed station or on board a vehicle and may be locally or remotely operated.

Device for detecting current

一种电流检测装置，包括：至少一个与主导体耦合并具有至少一个空气隙的磁路；至少一个与该磁路耦合的测量线圈；置于该空气隙内的磁场探测器装置，一个控制电路和一个相应的电流源；放在该空气隙附近的测量线圈内的扼架，它在形成该空气隙的两个磁路部件之间构成磁分路器。

Current transducer with magnetic field detector module

An electrical current transducer (2) comprising a magnetic core (6) and a magnetic field detector module (8), the magnetic core and magnetic field detector module each forming a single unit separably mountable around a primary conductor (4) and to a circuit board (10), the magnetic core having a general U shape comprising an end branch (14a) and lateral branches (14b) extending the end branch to respective free ends (14c), the magnetic field detector module being positioned between the lateral branches and extending across a whole width of a gap formed between the lateral branches. The magnetic field detector module comprises at least one magnetic field sensing cell (16), a pair of magnetic concentrators (22) arranged in mirror opposition forming a magnetic field gap (26) therebetween in which the at least one sensing cell is positioned, and an insulating body (20) supporting the magnetic concentrators and at least one sensing cell.

Current sensor

闭环电流传感器，包括磁路、磁场传感器、及补偿电路，该补偿电路配置成产生磁场，该磁场与由待被测量的、在一个或更多个初级导体(10)中流动的电流产生的磁场相反，该一个或更多个初级导体(10)延伸穿过磁路的中央开口(38)。磁路包括由组装在一起的至少两个芯部分(28a、28b)制成的磁芯(4)，以形成大体闭合的磁路，其中，磁路的第二支路(32)包括由至少部分地围绕空腔部分(44)的一个或更多个侧部壁部分(46a、46b、46a′、46b′)接合的内部壁部分(40a、40b)和外部壁部分(42a、42b)，该空腔部分(44)在其中接纳磁场传感器(8)，侧部和外部壁部分从内部壁部分的一个或两个侧部边缘延伸。

Current transducer

Current measuring device

A current measuring device includes first and second current transformers, having each a magnetic core, a primary conductor or winding and a secondary winding coupled with the magnetic core, the primary windings or conductors being connected to carry the current to be measured. The secondary windings of the first and second transformers have an equal number of turns and are connected in series with each other, and arranged so that the currents induced in the secondary windings by the current to be measured flow in the same direction. A current generator has an output connected to the secondary winding of the first current transformer for feeding to the same a current comprising a magnetizing current component capable of driving the corresponding core, alternately, in opposite states of saturation. A device is provided for controlling the generator by the magnetizing current component, and measuring device are provided for measuring the current flowing in the secondary winding of the second current transformer, which is proportional to the current to be measured.

Arrangement for measuring a current flowing through a conductor by means of magnetic field compensation

THREE PHASE CURRENT SENSOR

Fluxgate electrical current transducer

Fluxgate based current transducer for measuring a primary current flowing in a primary conductor, comprising a fluxgate magnetic field detector and a measuring circuit. The fluxgate magnetic field detector includes an excitation coil driven by an oscillating excitation current (I fluxgate ) supplied by the measuring circuit. The measuring circuit is configured to provide a first and a second measurement output of the oscillating excitation current. The transducer further comprises a signal output processing unit for comparing in real-time the first and second measurements outputs, wherein the signal output processing unit is configured to send an error signal output if the difference between said first and second measurements outputs exceeds a tolerance value.

Rogowski coil

Open-loop electric current sensor and a power supply circuit provided with such sensors

An open-loop current sensor comprising a magnetic circuit having an air gap, a magnetic field detector disposed in the air gap, and a primary conductor having one or more turns surrounding the magnetic circuit, the current to be measured flowing in the primary conductor, the sensor being characterised in that the turns of the primary conductor are disposed close to the air gap, on each side of the air gap.

Current transducer

Electric current pick-up shoe

本发明涉及一种补偿在磁路(1)中由相应初级电流和在一个次级线圈中循环的补偿电流产生的磁通的电流检测靴。所述次级线圈(5)在其表面处包括一层形成连接到一个固定电位(13)上的保护绕组的螺旋(12),从而实际消除在初级电流导体(4)与次级线圈(5)绕组(6)之间的漏电容的影响。

Electrical current transducer with magnetic field gradient sensor

Current transducer comprising a section of a primary conductor (2) and a magnetic field gradient sensor (4) mounted in proximity to the primary conductor configured to measure a magnetic field gradient in a gradient measurement direction (Y) transverse to a direction of flow (Z) o f a primary current (I P ) flowing in the primary conductor. The current transducer further comprises a first lateral magnetic shim (6a) mounted adjacent a first outer side of the primary conductor, and a second lateral magnetic shim (6b) mounted adjacent a second outer side of the primary conductor, a major internal surface (10) of the first and second magnetic shims facing the magnetic field gradient sensor and extending essentially parallel to the direction of flow (Z) of the primary current.

Current transducer with integrated primary conductor bar

Electrical current transducer including a primary conductor bar (4) for carrying the current to be measured, a magnetic core (6) comprising a magnetic circuit gap (22), a magnetic field sensor (8) comprising a magnetic field detector positioned in the magnetic circuit gap, and an insulating housing (10) surrounding the magnetic core and magnetic field sensor. The primary conductor bar comprises connection terminal ends (12a, 12b) extending outside of the housing configured for connection to an external primary conductor. The primary conductor bar comprises a core passage section (16) comprising a fuse portion (20) configured for interruption of the primary conductor if a predefined electrical current is exceeded. The core passage section has a reduced width (W1) in comparison to the connection terminal ends (12a, 12b) extending outside of the housing thereby providing indents (17a, 17b) within which at least a portion of the magnetic core is positioned such that a central passage (18) of the magnetic core has a width (W3) less than the width (W2) of the primary conductor connection ends (12a, 12b).

Magnetic field sensor and electrical current sensor thereof

一种磁场传感器包括一个磁场传感单元(10)和一个磁场屏蔽(9)，该磁场屏蔽包括由一个空气隙(20)隔开的至少两个部件(12a、12b)，并且围绕放置在该磁场屏蔽的一个空腔(11)中的磁场传感单元。

Electric current sensor

An electric current sensor comprises a housing (2), a magnetic circuit (4) comprising a magnetic core, and a magnetic field detector (5) with a detection cell (25), positioned in an air gap (18) between ends (19, 20) of said core. The core (17) is made of a non-laminated magnetic material, and the magnetic circuit has a strap (21) made of non-magnetic material welded to the core at each side of the air gap. The magnetic field detector has a support plate (26) on which the detection cell is mounted. The plate has a recess (30), opposite the detection cell, which houses one end of the magnetic circuit.

Closed-loop current transducer with switched mode amplifier

A closed-loop current transducer for measuring a current (Ip) flowing in a primary conductor (5), the transducer powered by series connected voltage supplies (V_H, V_L) and comprising a magnetic field detector (WS2), a signal processing circuit including an amplifier circuit (1,2) connected to the magnetic field detector, and a compensation winding (WS1) connected to the amplifier circuit and configured to generate an opposing magnetic field seeking to cancel a magnetic field generated by the current flowing in the primary conductor. The amplifier circuit comprises a first switched mode power stage (1) configured to drive the magnetic field generator, and a second switched mode power stage (2) configured to balance the currents of the voltage supplies.

Current sensor with magnetic core with air gaps

Current transducer

Current transducer

Current transducer

Current transducer including a housing (2) comprising a coil support (4), a magnetic core (5) extending between a first end (20a) and a second end (20b) forming a magnetic circuit gap therebetween, and a coil (6) comprising a plurality of windings formed around the coil support (4). The coil support (4) comprises a core receiving channel (13) within which the magnetic core is inserted, the coil support comprising a radially inner support portion (10) and a radially outer support portion (12) between which the core receiving channel (13) is disposed. The radially inner support portion (10) is slidably movable with respect to the radially outer support portion (12).

Current transducer

Electrical current transducer

A closed-loop current transducer comprising a magnetic circuit (4), a magnetic field detector (8), and a compensation coil assembly (6) configured to generate a magnetic field opposing a magnetic field created by an electrical current to be measured flowing in one or more primary conductors (2) extending through a central opening of the magnetic circuit. The magnetic circuit comprises a first branch (12), a second branch (14), and first and second end branches (16a, 16b), interconnecting the first and second branches such that the branches surround a central passage through which the one or more primary conductors may extend, the second branch forming a receptacle (22) that defines a cavity (28) extending in an axial direction A for receiving a sensing portion of the magnetic field detector, the second branch comprising two second branch portions (14a, 14b) separated by an interface resulting from the bringing together of opposed ends (31a, 31 b) of a single piece magnetic circuit.

Electric current sensor having housing with rails to insert support board

An electric current sensor having a housing, magnetic circuit with a magnetic core, and a magnetic field detector with a detection cell, positioned in an air gap between ends of the core. The core is made of a non-laminated magnetic material, and the magnetic circuit has a strap made of non-magnetic material welded to the core at each side of the air gap. The magnetic field detector has a support plate on which the detection cell is mounted. The plate has a recess, opposition the detection cell, which houses one end of the magnetic circuit.

Electrical current transducer

Current transducer with coil former

Current transducer including a housing comprising a coil support, a magnetic core extending between a first end and a second end, and a coil comprising a plurality of windings formed around the coil support. The coil support comprises a core receiving channel within which the magnetic core is inserted, the coil support comprising a radially inner support portion and a radially outer support portion between which the core receiving channel is disposed. The radially inner support portion is slidably movable with respect to the radially outer support portion.

ELECTRIC CURRENT SENSOR DEVICE

Current transducer

Hall sensor system

本公开涉及霍尔传感器系统。集成电路霍尔传感器系统包含多个基块(EB)，每个基块都包括霍尔单元(4)、差分差值放大器(DDA)的输入级的差分对(8)，和端子(12a、12b)，其中端子(12a、12b)横向置于与Y轴平行的每个基块的相反外侧上，并且多个基块以并列方式布置以便形成垂直于Y轴沿着X轴延伸的至少一排(6a、6b)，并且通过端子互相连接。

Thin film fluxgate sensor

A fluxgate magnetic field sensor including an excitation current conductor ( 4 ) and a layer of saturable magnetic material cladding ( 6 ) having a plurality of feed-through channels ( 16 ) extending between opposed faces of the cladding layer, the excitation current conductor weaving through a plurality of said feed-through channels.

Battery current sensor

一种电池电流传感器，包括电池极柱连接夹钳部分（2）和电流感测部分（16），其中电池极柱连接夹钳部分包括配置成围绕电池（5）的接线柱（3）夹紧的管状夹紧主体，而电流感测部分包括磁性电路（16）和磁场传感器（18）。磁性电路包括包围管状夹紧主体（6）的磁芯。

Winding device for forming an electrical coil on a magnetic air gap circuit

Electrical current transducer

DC current measuring circuit with voltage isolation between current path and measuring circuit

The circuit has a current converter (1) with a primary winding (3) carrying the measurement current on its core (2), a secondary winding (4) carrying a compensation current and an indicator winding (5). A voltage is induced in the indicator winding when the measurement current changes. The indicator winding is connected to the input of an amplifier (7) whose output is connected to the secondary winding and a load resistor (9). The amplifier input is connected via a first changeover device (6) to the indicator winding so that the amplifier's offset voltage can be alternately connected to the indicator winding directly or inverted. The amplifier output is connected via a second changeover device (8) to the secondary winding so that the direction of the compensation current in the winding can be changed. The changeover devices are connected to a clock generator which generates a timing signal (T) for their synchronous operation. <IMAGE>

Current sensor

Kelvin connector including temperature sensor

The electrical measuring apparatus ( 17 ) and temperature sensing apparatus minimises the number of connections required for each contact ( 30, 31 ) of a battery ( 18 ). The present invention measures the core temperature of the battery ( 18 ) which is useful in monitoring the health of the battery ( 18 ). The apparatus comprises first connection means to connect to the first contact ( 30 ) of the battery ( 18 ) and second connection means to connect to the second contact ( 31 ) of the battery ( 18 ). The apparatus includes a thermistor ( 36 ) which connects in series with one lead ( 32 ) of the connecting means. Accordingly, the apparatus does not require the temperature sensor ( 36 ) to be independently connected to the battery ( 18 ).

Isolation transformer

Current transducer with fluxgate detector

Clip-on current transducer or current transformer

一种用于围绕承载待测电流的电气初级导体安装的电流变换器，包括初级导体接收孔(16)、壳体(4)、安装在壳体中的磁芯(6)，以及围绕磁芯的支部缠绕的二级线圈(10)。壳体包括主要部分(4a)和次要部分(4b)，主要部分可以与次要部分分离，并且配置为围绕初级导体安装并锁定，壳体的主要部分和次要部分可以在接合面(32a、36a)耦接到一起。磁芯包括可安装在壳体主要部分(4a)的芯接收腔(20)中的主要部分(6a)，以及可安装在壳体次要部分(4b)的芯接收腔(22)中的次要部分(6b)。壳体还包括：包括线圈支撑部分(28)的电气元件支撑体(4c)，二级线圈围绕线圈支撑部分(28)安装；被接收在壳体主要部分(4a)的芯接收腔的第一支部接收部分(20a)中的二级线圈和线圈支撑部分，其中线圈支撑部分包括芯接收腔(26)，芯接收腔(26)包括第一支部接收部分(26a)，在第一支部接收部分(26a)中接收磁芯主要部分(6a)的第一支部(7a)，磁芯第一支部(7a)的纵轴(A)在相对于接合面(32a、36a)的横向方向。

Current transducer

High bandwidth open-loop current sensor

Open-loop electrical current sensor ( 1 ) for measuring the electrical current flowing in a primary conductor, comprising a magnetic circuit ( 3 ) with an air-gap ( 4 ), and a magnetic field sensing device ( 5 ) positioned at least partially in said air-gap. The magnetic field sensing device comprises a circuit board ( 7 ), a first magnetic field detector ( 8 ) mounted on the circuit board, and a second magnetic field detector ( 11 ). The second magnetic field detector comprises a conductive coil formed on the circuit board, the output signals of the first magnetic field detector and the second magnetic field detector being adapted for connection to a signal processing circuit ( 6 ) generating an output signal representative of the primary electrical current.

Current sensor having a magnetic core with airgap and power supply circuit provided with such sensors

Electrical current transducer

A current transducer including a housing comprising an outer casing, a magnetic circuit core configured to encircle at least one primary conductor, and a magnetic field detector positioned in a magnetic circuit gap of the magnetic circuit core. The housing further includes an inner support part comprising a main body portion and a magnetic core support portion. The magnetic circuit core is in the form of a thin strip of amorphous material supported on the main body portion and magnetic core support portion, the magnetic circuit gap being formed between overlapping ends of the strip.

Magnetic field sensor arrangement and current transducer therewith

Magnetic field sensor arrangement for positioning in a gap formed between end faces (12) of a magnetic core (4), comprising a magnetic field detector (5), a housing (10), and a grounding device (8), the magnetic field sensor and grounding device being mounted to the housing. The grounding device comprises at least one contact (20) elastically supported and configured for electrical contact with the magnetic core. The elastically supported contact is mounted adjacent a sensing portion of the magnetic field sensor and configured for insertion in the magnetic circuit core gap such that the contact elastically biases against the end face of the magnetic core.

Electric current sensing device

Electrical current transducer

Current sensor with laminated magnetic core

ELECTRIC CURRENT SENSOR DEVICE

LE PRESENT DISPOSITIF COMPORTE UN CIRCUIT MAGNETIQUE 22 COUPLE AVEC UN CONDUCTEUR PRIMAIRE 1 ET AVEC UNE BOBINE DE MESURE 2 CONNECTEE A UNE SOURCE DE COURANT PAR L'INTERMEDIAIRE D'UN CIRCUIT DE COMMANDE CORRESPONDANT. LE CIRCUIT MAGNETIQUE PRESENTE UN ENTREFER 23 DANS LEQUEL EST DISPOSE UN DISPOSITIF DETECTEUR DE CHAMP MAGNETIQUE 3 CONNECTE ELECTRIQUEMENT A L'ENTREE DUDIT CIRCUIT DE COMMANDE POUR L'ASSERVISSEMENT D'UN COURANT DE COMPENSATION DU CHAMP MAGNETIQUE, FOURNI A LADITE BOBINE DE MESURE. LE DISPOSITIF COMPORTE UN CIRCUIT IMPRIME AGENCE POUR MINIMISER L'INTERACTION ENTRE LE CIRCUIT DU COURANT DE MESURE ET L'ENTREE DU CIRCUIT DE COMMANDE, POUR REDUIRE L'INTERACTION ENTRE LE CONDUCTEUR PRIMAIRE ET LA BOBINE DE MESURE PAR RAYONNEMENT ELECTRO-MAGNETIQUE ET POUR AMELIORER LA DISSIPATION DE CHALEUR DU CIRCUIT IMPRIME. L'INVENTION S'APPLIQUE A LA MESURE D'UN COURANT PRIMAIRE D'INTENSITE RELATIVEMENT ELEVEE ET PERMET DE REDUIRE L'ENCOMBREMENT TOUT EN AMELIORANT LES PERFORMANCES DES DISPOSITIFS CONNUS. THIS DEVICE INCLUDES A MAGNETIC CIRCUIT 22 COUPLED WITH A PRIMARY CONDUCTOR 1 AND WITH A MEASURING COIL 2 CONNECTED TO A CURRENT SOURCE THROUGH A CORRESPONDING CONTROL CIRCUIT. THE MAGNETIC CIRCUIT PRESENTS AN GAP 23 IN WHICH IS AVAILABLE A MAGNETIC FIELD DETECTOR DEVICE 3 ELECTRICALLY CONNECTED TO THE INPUT OF THE SAID CONTROL CIRCUIT FOR THE ENTRY OF A COMPENSATION CURRENT OF THE MAGNETIC FIELD, PROVIDED TO THE SAID MEASURING COIL. THE DEVICE INCLUDES A PRINTED CIRCUIT AGENCY TO MINIMIZE THE INTERACTION BETWEEN THE MEASURING CURRENT CIRCUIT AND THE CONTROL CIRCUIT INPUT, TO REDUCE THE INTERACTION BETWEEN THE PRIMARY CONDUCTOR AND THE MEASURING COIL BY ELECTRO-MAGNETIC RADIATION AND TO IMPROVE HEAT DISSIPATION FROM THE PRINTED CIRCUIT. THE INVENTION IS APPLIED TO THE MEASUREMENT OF A PRIMARY CURRENT OF RELATIVELY HIGH INTENSITY AND ALLOWS THE OVERALL DIMENSIONS TO BE REDUCED WHILE IMPROVING THE PERFORMANCE OF KNOWN ...

Fluxgate current transducer

Fluxgate current transducer including a fluxgate device comprising a saturable soft magnetic core and an excitation coil, and a processing circuit comprising a control circuit and a voltage generator connected to the control circuit for generating an alternating current in the excitation coil, the voltage generator generating a voltage oscillating between a maximum positive voltage (+U) and a maximum negative voltage (−U) configured to alternatingly saturate the soft magnetic core. The signal processing circuit comprises an overload circuit portion connected to the control circuit, configured to generate overload currents through the excitation coil over time windows (Tn) after detection of the excitation coil current reaching positive and negative threshold currents (+S 3 , −S 3 ) representative of saturation of the magnetic core, during at least one of a plurality of alternating voltage periods (P).

ELECTRIC CURRENT SENSOR DEVICE

Le présent dispositif capteur comporte un circuit magnétique 1 couplé avec un conducteur primaire 4 et avec au moins une bobine de mesure 5 alimentée par un courant de mesure, de façon à compenser le champ magnétique créé par le courant primaire. Le circuit magnétique présente au moins un entrefer 2 avec une sonde de Hall 7 pour détecter la compensation des champs. Selon l'invention, un blindage magnétique 9 est prévu au voisinage de l'entrefer, à l'intérieur de la bobine de mesure pour éviter l'influence de champs magnétiques extérieurs. Ce blindage est particulièrement efficace et, au lieu d'affecter la mesure, permet même d'augmenter la précision dans une bande passante s'étendant de 0 à plus de 100 kHz. L'invention s'applique à la mesure et à la création d'une image de courants de forte intensité. The present sensor device comprises a magnetic circuit 1 coupled with a primary conductor 4 and with at least one measuring coil 5 supplied with a measuring current, so as to compensate for the magnetic field created by the primary current. The magnetic circuit has at least one air gap 2 with a Hall probe 7 to detect the compensation of the fields. According to the invention, a magnetic shielding 9 is provided in the vicinity of the air gap, inside the measuring coil to avoid the influence of external magnetic fields. This shielding is particularly effective and, instead of affecting the measurement, even makes it possible to increase the precision in a bandwidth extending from 0 to more than 100 kHz. The invention applies to the measurement and creation of an image of high intensity currents.

Electrical current transducer with wound magnetic core

Kelvin connector including temperature sensor

电测量装置(17)和温度检测装置使蓄电池(18)的每个接头(30，31)所需的连接数最少。本发明测量蓄电池(18)的核心温度，这在监测蓄电池(18)的正常工作时是有用的。该装置包括连接到蓄电池(18)的第一接头(30)的第一连接装置和连接到蓄电池(18)的第二接头(31)的第二连接装置。该装置包括与连接装置的一根引线(32)串联连接的热敏电阻(36)。因此，该装置不需要将温度传感器(36)独立地连接到蓄电池(18)。

Current transducer with fluxgate detector

Electrical current transducer (2) of a closed-loop type for measuring a primary current (IP) flowing in a primary conductor (1), comprising a fluxgate measuring head (7) and an electronic circuit (16) including a microprocessor (18) for digital signal processing. The measuring head includes a secondary coil (6) and a fluxgate detector (4) comprising an excitation coil and a magnetic material core. The electronic circuit comprises an excitation coil drive circuit (14) configured to generate an alternating excitation voltage to supply the excitation coil with an alternating excitation current (Ifx), the secondary coil (6) connected in a feedback loop (12) of the electronic circuit to the excitation coil drive circuit (14), the electronic circuit further comprising a ripple compensation circuit (26, 28) configured to compensate for a ripple signal generated by the alternating excitation voltage.

ELECTRIC CURRENT SENSOR WITH HIGH BANDWIDTH

Current measurement system

A current measurement system comprising a multi-phase open loop current transducer for measuring phase currents (I1, I2, I3) flowing in a plurality n of primary conductors of a multi-phase electrical system. The transducer comprises a housing, a magnetic core including first and second core parts and a plurality n+1 of magnetic field detectors mounted in the housing between the first and second core parts in which portions of the primary conductors traversing the current transducer housing are positioned. The system further comprises a non-volatile memory in which information on at least one coupling matrix (K), pre-defined in a calibration procedure, is stored.

Current measurement system

A current measurement system comprising a multi-phase open loop current transducer for measuring phase currents ( l 1 , I 2 , I 3 ) flowing in a plurality n of primary conductors of a multiphase electrical system. The transducer comprises a housing (2), a magnetic core (3) including first and second core parts (3a, 3b) and a plurality n+1 of magnetic field detectors (4) mounted in the housing (2) between the first and second core parts in which portions of the primary conductors traversing the current transducer housing are positioned. The system further comprises a non-volatile memory in which information on at least one coupling matrix ( K ), pre-defined in a calibration procedure, is stored, said at least one coupling matrix linking the phase currents ( l 1 , I 2 , I 3 ) flowing in the primary currents to magnetic induction fields ( B 1 , B 2 , B 3 , B 4 ) detected by said magnetic field detectors, and a computation unit configured to compute the values of said n phase currents from the outputs of said n+1 magnetic field detectors using the coupling matrix. The computation unit is further configured to estimate n phase currents in a degraded mode using n+1 degraded mode coupling matrices that allows detection of faults in the magnetic field detectors, leakage currents, or overcurrents.

Current sensor

一种电流传感器包含具有气隙的磁路、位于所述气隙中的磁场传感器、以及围绕着所述磁路的一个分支的次级线圈。所述磁路包含至少两个被组装在一起的部件(18、20)，每个部件的一个分支部分(45、46)在轴向(A)上被可插入地容纳在所述次级线圈的中心空腔中。气隙(30)被安置在重叠的每个磁场电路部件的分支部分之间。

Current transducer with magnetic core on primary conductor

An open loop electrical current transducer (2) comprising a primary conductor bar (4, 104, 104´) for carrying a current to be measured, a magnetic core (6) having a U shape formed by an end branch (6a) and lateral branches (6b) upstanding therefrom to free ends, a magnetic circuit gap (5) formed between inner surfaces (18b) of the lateral branches (6b) at the free ends of the lateral branches, a magnetic field detector (8) positioned in the magnetic circuit gap (5), and a housing surrounding the magnetic core (6) and a section of the primary conductor bar extending through the magnetic core (6) and beyond the magnetic core either side thereof. The primary conductor bar comprises a central portion (14, 114, 114´) having a width (Wc) equal to the width of a magnetic field gap (Wg) such that the central portion is clamped between said lateral branches in an interference force fit.

Orthogonal Fluxgate Magnetic Field Sensor

Orthogonal fluxgate sensor for measuring an external magnetic field Hext, comprising a conductor for carrying an excitation current lexc, a ferromagnetic material adapted to saturate in the presence of a magnetic field generated by the excitation current, and at least one pick-up coil adapted to detect variations in the magnetic field in the vicinity of the magnetic material. The excitation conductor comprises a substantially linear elongated portion of conductive, non-magnetic material, forming an excitation rod ( 6 ). The magnetic material surrounds the excitation rod in the form of a cladding ( 8 ).

Electrical current transducer

Fluxgate based current transducer (2) for measuring a primary current flowing in a primary conductor, comprising a fluxgate magnetic field detector (4) and a measuring circuit (6). The fluxgate magnetic field detector (4) includes an excitation coil (14) driven by an oscillating excitation current ( I fluxgate ) supplied by the measuring circuit (6). The measuring circuit (6) is configured to provide a first and a second measurement output of the oscillating excitation current. The transducer (2) further comprises a signal output processing unit (7) for comparing in real-time the first and second measurements outputs, wherein the signal output processing unit (7) is configured to send an error signal output if the difference between said first and second measurements outputs exceeds a tolerance value.

Electronic power switch drive module

An electronic power switch drive module for a power semiconductor unit, comprising a gate drive and a current transducer mounted on one or more circuit boards, the gate drive comprising at least one circuit portion for controlling at least one transistor of a power semiconductor module of said power semiconductor unit, the current transducer configured to be coupled to an output of the power semiconductor module for measuring an output current of the power semiconductor module, said at least one circuit portion connected to an output potential of the output current to be measured. The current transducer comprises at least one magnetic field sensor, the current transducer being connected to said at least one circuit portion of the gate drive at said output potential in a non-isolated manner.

電流センサを組み込んだ電流供給装置

(57)【要約】 【課題】 小スペースで且つ非常に安価に製造でき、 電流センサと共に合体されて用いられる電流供給装置を 提供すること。 【解決手段】 ある負荷に対して直流、サイン波電流又 はパルス電流を供給するための電流供給装置である。負 荷と直列接続されると共に少なくとも一つの空隙１３， １４を有する磁気回路１１，１２と接続される導体部分 ６’，６’’と、空隙内１３，１４に配置されると共に 前記電流供給装置によって供給される電流を表示する出 力信号を発生するための測定回路１６に接続された磁界 検出素子１５とを有する。電流センサーを自己誘導手段 へ合体させることで、電流供給装置において別体の磁気 回路を使わなくても済むようになる。