WO2012046547A1 - Capteur de courant - Google Patents

Capteur de courant Download PDF

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Publication number
WO2012046547A1
WO2012046547A1 PCT/JP2011/070884 JP2011070884W WO2012046547A1 WO 2012046547 A1 WO2012046547 A1 WO 2012046547A1 JP 2011070884 W JP2011070884 W JP 2011070884W WO 2012046547 A1 WO2012046547 A1 WO 2012046547A1
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WO
WIPO (PCT)
Prior art keywords
current
sensor
magnetic sensor
conductive path
magnetic
Prior art date
Application number
PCT/JP2011/070884
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English (en)
Japanese (ja)
Inventor
真司 三ツ谷
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アルプス・グリーンデバイス株式会社
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Publication of WO2012046547A1 publication Critical patent/WO2012046547A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/207—Constructional details independent of the type of device used
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G01R15/205—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using magneto-resistance devices, e.g. field plates

Definitions

  • the present invention relates to a current sensor that measures the magnitude of a current, and more particularly, to a current sensor that can reduce noise from disturbance magnetism.
  • the current line is the Z axis
  • the one axis orthogonal to the current line is the X axis
  • the one axis orthogonal to the Z axis and the X axis is the Y axis, and is adjacent to the Y axis direction with the X axis in between.
  • a pair of magnetic sensors is arranged.
  • the pair of magnetic sensors are arranged so that the magnetic field detection direction is directed in the X-axis direction and the output signals of each other are in reverse phase.
  • disturbance magnetism is not equally applied to a pair of magnetic sensors, for example, when spherical disturbance magnetism is applied only to one of the pair of magnetic sensors.
  • spherical disturbance magnetism is applied only to one of the pair of magnetic sensors.
  • the magnitude of noise in the output signal output from each magnetic sensor is different, it is difficult to completely remove noise due to disturbance magnetism even if a pair of magnetic sensors are operated differentially.
  • disturbance magnetism can be reduced by providing a shield shield that shields disturbance magnetism around the pair of magnetic sensors.
  • the present invention has been made in view of such points, and an object of the present invention is to provide a current sensor that can suppress magnetic saturation of a shielding material even when the current to be measured is large and can improve the measurement accuracy of the current to be measured.
  • the current sensor of the present invention includes a first conductive path for passing a current to be measured in one direction, a second conductive path for passing the current to be measured in a direction opposite to the first conductive path, A conductive member having at least one magnetic field; at least one magnetic sensor that outputs an output signal by an induced magnetic field from the current to be measured that flows through the conductive member; and disturbance magnetism with respect to the magnetic sensor provided to cover the magnetic sensor And a shielding material for shielding.
  • the induced magnetic field due to the measured current flowing through the first conductive path of the conductive member cancels out the induced magnetic field due to the measured current flowing through the second conductive path. Even when the measurement current is large, the magnetic saturation of the shielding material can be suppressed. For this reason, disturbance magnetism can be shielded by the shielding material, and the measurement accuracy of the current to be measured can be improved.
  • the current sensor of the present invention includes a first conductive path for passing a measured current in one direction, a second conductive path for passing the measured current in a direction opposite to the first conductive path, A first magnetic sensor and a second magnetic sensor that output opposite phase output signals by the induced magnetic field from the current to be measured flowing through the conductive member, and the first magnetic sensor.
  • a differential unit that differentially calculates an output signal of the sensor and an output signal of the second magnetic sensor, and the first magnetic sensor provided so as to cover the first magnetic sensor and the second magnetic sensor And a shielding material for shielding disturbance magnetism with respect to the second magnetic sensor.
  • the induced magnetic field due to the measured current flowing through the first conductive path of the conductive member cancels out the induced magnetic field due to the measured current flowing through the second conductive path. Even when the measurement current is large, the magnetic saturation of the shielding material can be suppressed. For this reason, disturbance magnetism can be shielded by the shielding material, and the measurement accuracy of the current to be measured can be improved.
  • the first magnetic sensor and the second magnetic sensor output output signals having opposite phases to each other, the output signal can be increased by differential calculation.
  • the first magnetic sensor and the second magnetic sensor have the same sensitivity axis direction. According to this configuration, noise in the output signals of the first magnetic sensor and the second magnetic sensor can be canceled out, and the measurement accuracy can be improved.
  • the first magnetic sensor and the second magnetic sensor are disposed on one surface side of the conductive member, and the first magnetic sensor is the first magnetic sensor of the conductive member.
  • An output signal is output by an induced magnetic field from the current to be measured flowing through the conductive path, and the second magnetic sensor is induced from the current to be measured flowing through the second conductive path of the conductive member.
  • the output signal is preferably output by a magnetic field.
  • the first magnetic sensor and the second magnetic sensor are disposed to face each other across the first conductive path or the second conductive path of the current line.
  • the output signal may be output by an induced magnetic field from a current to be measured flowing through the conductive path or the second conductive path.
  • the conductive member is preferably U-shaped in plan view.
  • the present invention it is possible to provide a current sensor that can suppress the magnetic saturation of the shielding material even when the current to be measured is large and can improve the measurement accuracy of the current to be measured.
  • FIG. 1 is a perspective view of a current sensor according to a first embodiment of the present invention.
  • (A) is a schematic plan view showing the current sensor according to the first embodiment of the present invention, and
  • (b) is a cross-sectional view taken along line AA in (a).
  • It is a block diagram which shows the current sensor which concerns on the 1st Embodiment of this invention. It is explanatory drawing of the induction magnetic field in the shielding shield of the current sensor which concerns on the 1st Embodiment of this invention.
  • (A) is a figure which shows the measurement result of the magnetic flux density of the shielding shield of the current sensor which concerns on the 1st Embodiment of this invention
  • (b) is the magnetic flux density of the shielding shield of the current sensor which concerns on a comparative example. It is a figure which shows the measurement result.
  • (A) is a schematic plan view of a current sensor according to a second embodiment of the present invention, and (b) is a cross-sectional view taken along line BB in (a).
  • (A) is a plane schematic diagram which shows the other example of the current sensor which concerns on the 2nd Embodiment of this invention
  • (b) is CC sectional view taken on the line of (a).
  • FIG. 1 is a perspective view of a current sensor 1 according to a first embodiment of the present invention.
  • a current sensor 1 according to the present embodiment includes a substantially rectangular parallelepiped shielding shield (magnetic shield) 11, and a conductive member 12 partially housed in a housing space inside the shielding shield 11. Is provided.
  • a first magnetic sensor 14a and a second magnetic sensor 14b are disposed on the upper surface of the conductive member 12 in the shielding shield 11 via a substrate 13, and the first magnetic sensor 14a and the second magnetic sensor 14b are used. The current to be measured flowing through the conductive member 12 is measured.
  • the shielding shield 11 is made of a material having high magnetic permeability such as silicon steel and permalloy, and is configured to shield external magnetism into the shielding shield 11.
  • the shielding shield 11 does not necessarily have a rectangular parallelepiped shape as long as it has a shape that shields disturbance magnetism into the shielding shield 11.
  • the shielding shield 11 is a shape which can shield the disturbance magnetism to the 1st magnetic sensor 14a and the 2nd magnetic sensor 14b, the 1st magnetic sensor 14a and the 2nd magnetic sensor 14b will be sealed completely. It may not be a structure, and may have a shape having an opening in part.
  • the conductive member 12 has a U-shaped flat plate shape in plan view, a pair of first conductive paths 12a and second conductive paths 12b extending in parallel with one direction, and the pair.
  • the first conductive path 12a and the third conductive path 12c connecting the one end sides of the second conductive path 12b.
  • One end side of the pair of first conductive path 12a and second conductive path 12b and the conductive path 12c of the conductive member 12 are stored in a storage space inside the shield shield 11, and the other end side is exposed to the outside of the shield shield 11. ing.
  • the conductive member 12 is electrically connected to an external current line through which the current to be measured flows, at the other end of the pair of first conductive path 12a and second conductive path 12b exposed to the outside of the shield shield 11.
  • Mounting holes 15a and 15b are provided respectively.
  • the first magnetic sensor 14a, the second magnetic sensor 14b, and the control unit 21 are provided on the upper surface of the conductive member 12 in the storage space of the shielding shield 11 via the substrate 13.
  • the first magnetic sensor 14 a and the second magnetic sensor 14 b detect an induced magnetic field from the current to be measured flowing through the conductive member 12 and output it as an output signal.
  • FIG. 2 (a) is a schematic plan view showing a current sensor according to an embodiment of the present invention
  • FIG. 2 (b) is a cross-sectional view taken along line AA in FIG. 2 (a).
  • the shielding shield 11 is omitted in FIGS. 2 (a) and 2 (b).
  • the first magnetic sensor 14 a is disposed at a position corresponding to the first conductive path 12 a of the conductive member 12 and the first conductive path of the conductive member 12.
  • An output signal is output by the induced magnetic field from the current to be measured flowing through 12a.
  • the second magnetic sensor 14b is disposed at a position corresponding to the second conductive path 12b of the conductive member 12, and is output by an induced magnetic field from a current to be measured flowing through the second conductive path 12b of the conductive member 12.
  • Output a signal is provided.
  • the sensitivity axis direction D1 of the first magnetic sensor 14a and the second magnetic sensor 14b is directed in the same direction. As used herein, the same direction includes the same direction having some errors within the range where the effects of the present invention are exhibited.
  • the current sensor 1 is configured such that the current path R1 of the current to be measured is in the order of the second conductive path 12b, the third conductive path 12c, and the second conductive path 12a of the conductive member 12,
  • the flow direction of the current to be measured flowing through the first conductive path 12a is opposite to the flow direction of the current to be measured flowing through the second conductive path 12b.
  • a current to be measured flowing through the pair of first conductive paths 12a and the second conductive paths 12b causes the pair of first conductive paths 12a and the second conductive paths 12b to be reversely rotated around each other. Since the induction magnetic fields Ha and Hb are generated, output signals having opposite phases are output from the first magnetic sensor 14a and the second magnetic sensor 14b.
  • the output signal due to the induction magnetic field formed by the current to be measured flowing through the conductive member 12 is added in reverse phase, and the detection sensitivity is increased.
  • noise due to other disturbance magnetism can be removed in phase.
  • substrate 13 is arrange
  • FIG. 3 is a block diagram showing a current sensor according to the embodiment of the present invention.
  • the first magnetic sensor 14a and the second magnetic sensor 14b are magnetic balance sensors, respectively, and feedback coils 141a and 141b arranged so as to be able to generate a magnetic field in a direction that cancels the magnetic field generated by the current to be measured. It is composed of two magnetoresistive effect elements as detection elements and bridge circuits 142a and 142b composed of two fixed resistance elements.
  • the control unit 21 amplifies the differential output of the bridge circuit 142a of the first magnetic sensor 14a and controls the feedback current of the feedback coil 141a and the differential / current amplifier 211 and the feedback current of the first magnetic sensor 14a.
  • a differential / current amplifier 213 that amplifies the differential output of the bridge circuit 142b of the second magnetic sensor 14b and controls the feedback current of the feedback coil 141b; It includes an I / V amplifier 214 that converts the feedback current of the sensor 14b into a voltage, and a differential amplifier 222 that amplifies the differential output of the I / V amplifiers 212 and 214.
  • the feedback coils 141a and 141b are arranged in the vicinity of the magnetoresistive effect elements of the bridge circuits 142a and 142b, and generate a canceling magnetic field that cancels the induced magnetic field generated by the current to be measured.
  • the magnetoresistive effect elements of the bridge circuits 142a and 142b include a GMR (Giant Magneto Resistance) element and a TMR (Tunnel Magneto Resistance) element.
  • the magnetoresistive element changes its resistance value by applying an induced magnetic field from a current to be measured.
  • the bridge circuits 142a and 142b have two outputs that generate a voltage difference according to the induced magnetic field generated by the current to be measured.
  • the two outputs of the bridge circuits 142a and 142b are amplified by the differential / current amplifiers 211 and 213, and the amplified outputs are supplied to the feedback coils 141a and 141b as currents (feedback currents).
  • This feedback current corresponds to a voltage difference according to the induced magnetic field.
  • a canceling magnetic field that cancels the induced magnetic field is generated in the feedback coils 141a and 141b.
  • the currents flowing through the feedback coils 141a and 141b when the induction magnetic field and the canceling magnetic field cancel each other are converted into voltages by the I / V amplifiers 212 and 214, and this voltage becomes the sensor output.
  • the power supply voltage is set to a value close to the reference voltage for I / V conversion + (maximum value within the rated value of feedback coil resistance ⁇ feedback coil current at full scale), thereby providing feedback.
  • the current is automatically limited, and the effect of protecting the magnetoresistive effect element and the feedback coil can be obtained.
  • the differential of the two outputs of the bridge circuits 142a and 142b is amplified and used as a feedback current. However, only the midpoint potential is output from the bridge circuit and based on the potential difference from a predetermined reference potential. It may be a feedback current.
  • the differential amplifier 222 processes the differential values of the output signals of the I / V amplifiers 212 and 214 as sensor outputs. By performing such processing, the influence of an external magnetic field such as geomagnetism on the output signals of the first magnetic sensor 14a and the second magnetic sensor 14b is canceled, and the current can be measured with higher accuracy.
  • FIG. 4 is an explanatory diagram of the induction magnetic field inside the shielding shield 11.
  • the flowing direction of the current to be measured flowing through the first conductive path 12a of the conductive member 12, and the side current flowing through the second conductive path 12b The direction of flow is the opposite direction.
  • the induction magnetic field Ha formed around the first conductive path 12a of the conductive member 12 and the induction magnetic field Hb formed around the second conductive path 12b are in opposite directions.
  • the induced magnetic field Ha and the induced magnetic field Hb are offset. The thus, since the intensity
  • Output signals from the first magnetic sensor 14 a and the second magnetic sensor 14 b are input to the differential amplifier 222 and subjected to differential calculation in the differential amplifier 222.
  • the output components based on the induced magnetic field of the current to be measured are added to each other because they are in opposite phases.
  • noise components based on the disturbance magnetism Hc are removed from the output signals of the first magnetic sensor 14a and the second magnetic sensor 14b because they are in phase with each other. For this reason, it is possible to reduce noise on the sensor output after the differential calculation, and to suppress a decrease in measurement accuracy.
  • FIG. 5A is a diagram illustrating a measurement result of the magnetic flux density of the shielding shield 11 of the current sensor 1 according to the present embodiment
  • FIG. 5B is a shielding shield 110 of the current sensor 100 according to the comparative example. It is a figure which shows the measurement result of magnetic flux density.
  • FIG. 5A shows a change in the magnetic flux density of the shield shield 11 when the current to be measured is passed through the current sensor 1 according to the present embodiment. Further, in FIG. 5B, the shield shield 110 when the current to be measured is passed only to one conductive member 120a of the current sensor 100 having the pair of conductive members 120a and 120b arranged in parallel. The change of the magnetic flux density is shown.
  • the induced magnetic field Ha from the current to be measured flowing through the first conductive path 12a of the conductive member 12 and the second conductive The induced magnetic field Hb from the current to be measured flowing through the path 12b is canceled out. Therefore, an increase in magnetic flux density of the shield shield 11 can be suppressed, and magnetic saturation of the shield shield 11 can be suppressed.
  • FIG. 5B in the current sensor 100 according to the comparative example, since the current to be measured flows only through the first conductive member 120a, an induced magnetic field is generated only from the first conductive member 120a. Arise.
  • the magnetic flux density of the shielding shield 110 is increased and magnetic saturation occurs.
  • the magnetic saturation of the shielding shield 11 is suppressed, disturbance magnetism can be shielded by the shielding shield 11 even when the current to be measured is large. .
  • the first conductive path 12a and the first conductive path 12a of the conductive member 12 having the pair of the first conductive path 12a and the second conductive path 12b.
  • an induced magnetic field from the current to be measured flowing through the first conductive path 12a and a target current flowing through the second conductive path 12b are obtained.
  • the induced magnetic field from the measurement current cancels out.
  • the raise of the magnetic flux density of the shielding shield 11 is suppressed, and magnetic saturation can be suppressed. Therefore, disturbance magnetism can be shielded by the shielding shield 11, and noise can be reduced even in an environment where non-uniform disturbance magnetism is applied.
  • the first magnetic sensor 14 a and the second magnetic sensor 14 b are not limited to the arrangement configuration described above, and are opposite in phase to each other by the induced magnetic field from the current to be measured flowing through the conductive member 12. Any arrangement that outputs an output signal may be used.
  • the term “reverse phase” as used herein includes a range that is shifted in phase so that a sufficient sensor output can be obtained after differential calculation.
  • the plan view It is not limited to the structure arrange
  • the reverse direction includes the reverse direction having some errors within the range where the effects of the present invention are exhibited.
  • the shape of the conductive member 12 through which the current to be measured flows is not necessarily limited to a rectangular cross section, and a circular cross section may be used. Furthermore, the conductive member 12 only needs to have at least a pair of the first conductive path 12a and the second conductive path 12b, and does not necessarily need to have a U shape in plan view. Further, as the conductive member 12, a bus bar made of an elongated rod-shaped metal member may be used.
  • FIG. 6A is a schematic plan view of the current sensor 2 according to the present embodiment
  • FIG. 6B is a cross-sectional view taken along line BB in FIG. 6A
  • the current sensor 2 according to the second embodiment of the present invention includes a rectangular frame-shaped shielding shield 31 having a rectangular opening 31a in plan view. And a rectangular substrate 32 disposed in the opening 31 a of the shielding shield 31.
  • the current sensor 2 includes a conductive member 33 that is arranged so that a flow direction of a current to be measured is substantially orthogonal to the main surface of the substrate 32, a first magnetic sensor 34 a that is arranged on the substrate 32, and a first sensor. And a second magnetic sensor 34b.
  • the shield shield 31 has a predetermined thickness in a height direction orthogonal to the main surface of the substrate 32, and shields disturbance magnetism from the side surfaces with respect to the first magnetic sensor 34a and the second magnetic sensor 34b. Be placed.
  • the conductive member 33 has a U shape in a side view, and a pair of first and second conductive paths 33 a and 33 b extending in the height direction of the shielding shield 31, and one end side of the substrate 32. And a third conductive path 33c that extends from the first end toward the other end side and connects one end side of the first conductive path 33a and the second conductive path 33b.
  • one end side of the pair of first conductive path 33 a and second conductive path 33 b connected by the third conductive path 33 c is arranged on the upper surface side of the substrate 32, and the other end side penetrates the substrate 32. Are disposed so as to protrude from the lower surface of the substrate 32.
  • the first magnetic sensor 34a and the second magnetic sensor 34b are disposed to face each other across the first conductive path 33a in the direction orthogonal to the extending direction of the third conductive path 33c in plan view. Further, the sensitivity axis direction D2 of the first magnetic sensor 34a and the second magnetic sensor 34b is directed in the same direction. That is, in the current sensor 2, the current to be measured flowing through the conductive member 33 passes from the other end side of the first conductive path 33 a on the lower surface side of the substrate 32 through the third conductive path 33 c on the upper surface side of the substrate 32.
  • the second conductive path 33b on the lower surface side of the substrate 32 is configured to flow to the other end side.
  • the induced magnetic field Ha from the measured current flowing through the first conductive path 33a of the conductive member 33 and the induced magnetic field Hb from the measured current flowing through the second conductive path 33b are offset. Therefore, the magnetic saturation of the shielding shield 31 can be reduced. Further, since the first magnetic sensor 34a and the second magnetic sensor 34b both obtain an output signal by induction magnetism from the current to be measured flowing through the first conductive path 33a, the current to be detected can be detected with higher accuracy. Can be measured.
  • FIGS. 7A and 7B show another configuration example of the current sensor 2.
  • FIG. 7B shows a cross-sectional view taken along the line CC of FIG. 7A.
  • the first magnetic sensor 34a and the second magnetic sensor 34b are arranged in parallel with one surface side of the conductive member 33 in the extending direction of the third conductive path 33c in plan view.
  • the first magnetic sensor 34a is disposed in the vicinity of the first conductive path 33a
  • the second magnetic sensor 34b is disposed in the vicinity of the second conductive path 33b.
  • the current sensor 2 shown in FIGS. 7A and 7B is provided through the substrate 32 and outputs the output signals of the first magnetic sensor 34a and the second magnetic sensor 34b to the outside.
  • a pin 35 is provided.
  • the sensor output pin 35 is electrically connected to the first magnetic sensor 34 a and the second magnetic sensor 34 b by a wiring pattern (not shown) provided on the substrate 32, and the first output via this wiring pattern.
  • the output signals of the magnetic sensor 34a and the second magnetic sensor 34b are output to the outside.
  • the sensor output pin 35 is provided such that the upper end protrudes upward from the upper surface of the substrate 32 and the lower end protrudes downward from the lower surface of the substrate 32.
  • the lower end of the sensor output pin 35 is arranged to be slightly shorter than the lower end of the first conductive path 33a and the lower end of the second conductive path 33b of the conductive member 33 in a side view.
  • the first conductive path 33a, the second conductive path 33b, and the sensor output pin 35 of the conductive member 33 are respectively provided from the lower surface of the substrate 32. Since it protrudes downward, it can be mounted directly on the circuit board.
  • the flow direction of the current to be measured is arranged so as to be substantially orthogonal to the main surface of the substrate 32, and the pair of first conductive elements
  • the induced magnetic field from the current to be measured flowing through the first conductive path 33a and the second conductive path 33b This cancels out the induced magnetic field from the current to be measured.
  • the raise of the magnetic flux density in the shielding shield 31 is suppressed, and magnetic saturation can be suppressed.
  • disturbance magnetism can be shielded by the shielding shield 31, and noise can be reduced even in an environment where non-uniform disturbance magnetism is applied. Further, even when the rectangular frame-shaped shielding shield 31 is used, disturbance magnetism can be shielded.
  • a magnetic balance type sensor is used as the first magnetic sensor and the second magnetic sensor.
  • the present invention is not limited to this configuration. Any magnetic sensor may be used as long as it outputs output signals having phases opposite to each other by an induced magnetic field from a current to be measured passing through the conductive member.
  • a magnetic proportional sensor may be used. By using a magnetic proportional sensor, it is possible to reduce power consumption as compared with a configuration using a magnetic balance sensor.
  • the present invention is not limited to the above embodiment, and can be implemented with various modifications.
  • the connection relationship, size, and the like of each element in the above embodiment can be changed as appropriate.
  • a magnetoresistive effect element is used for the magnetic balance type current sensor.
  • a Hall element or other magnetic detection element is used for the magnetic balance type current sensor. Also good.
  • the present invention can be implemented with appropriate modifications without departing from the scope of the present invention.
  • the present invention can be applied to a current sensor that detects the magnitude of a current for driving a motor of an electric vehicle or a hybrid car.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Abstract

La présente invention concerne un capteur de courant dans lequel la saturation magnétique d'un matériau de blindage peut être supprimée, même si un courant à mesurer est important, et dans lequel la précision de mesure du courant à mesurer est améliorée. Un capteur de courant (1) de la présente invention est caractérisé en ce qu'il est doté d'un élément conducteur (12) qui comprend un premier trajet conducteur (12a) dans lequel circule dans une direction un courant à mesurer, et un second trajet conducteur (12b) dans lequel circule le courant à mesurer dans la direction inverse à la direction du courant dans le premier trajet conducteur (12a) ; de capteurs magnétiques (14a, 14b) qui émettent des signaux de sortie au moyen du champ d'induction à partir du courant à mesurer qui circule dans l'élément conducteur (12) ; et d'un blindage protecteur (11) qui est conçu pour recouvrir les capteurs magnétiques (14a, 14b) et qui protège les capteurs magnétiques (14a, 14b) d'un magnétisme perturbateur.
PCT/JP2011/070884 2010-10-08 2011-09-13 Capteur de courant WO2012046547A1 (fr)

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JP2010228463 2010-10-08
JP2010-228463 2010-10-08

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014202737A (ja) * 2013-04-03 2014-10-27 甲神電機株式会社 電流センサ
WO2015075623A1 (fr) * 2013-11-19 2015-05-28 Danfoss Silicon Power Gmbh Module de puissance comprenant une mesure de courant intégrée
WO2017089048A1 (fr) * 2015-11-23 2017-06-01 Zf Friedrichshafen Ag Dispositif pour la mesure de courant haute et moyenne tension
CN107430156A (zh) * 2015-03-18 2017-12-01 丰田自动车株式会社 电流传感器
CN111936872A (zh) * 2018-03-20 2020-11-13 株式会社电装 电流传感器
WO2023056828A1 (fr) * 2021-10-08 2023-04-13 江苏多维科技有限公司 Capteur de courant

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JPH0534374A (ja) * 1991-08-02 1993-02-09 Fujitsu Ltd 電流センサを使用した電流検出方法
JP2006112813A (ja) * 2004-10-12 2006-04-27 Canon Electronics Inc 電流センサ及びそれを用いた電流検知ユニット
JP2008268219A (ja) * 2007-04-23 2008-11-06 Magic Technologies Inc 磁気センサおよびその製造方法、並びに電流検出方法および電流検出装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0534374A (ja) * 1991-08-02 1993-02-09 Fujitsu Ltd 電流センサを使用した電流検出方法
JP2006112813A (ja) * 2004-10-12 2006-04-27 Canon Electronics Inc 電流センサ及びそれを用いた電流検知ユニット
JP2008268219A (ja) * 2007-04-23 2008-11-06 Magic Technologies Inc 磁気センサおよびその製造方法、並びに電流検出方法および電流検出装置

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014202737A (ja) * 2013-04-03 2014-10-27 甲神電機株式会社 電流センサ
WO2015075623A1 (fr) * 2013-11-19 2015-05-28 Danfoss Silicon Power Gmbh Module de puissance comprenant une mesure de courant intégrée
CN107430156A (zh) * 2015-03-18 2017-12-01 丰田自动车株式会社 电流传感器
EP3273255A4 (fr) * 2015-03-18 2018-05-02 Toyota Jidosha Kabushiki Kaisha Capteur de courant électrique
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WO2017089048A1 (fr) * 2015-11-23 2017-06-01 Zf Friedrichshafen Ag Dispositif pour la mesure de courant haute et moyenne tension
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WO2023056828A1 (fr) * 2021-10-08 2023-04-13 江苏多维科技有限公司 Capteur de courant

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