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WO2019034390A1 - Ensemble de mesure et procédé servant à détecter de manière magnétique un courant électrique, ainsi que véhicule comprenant un ensemble de mesure de ce type - Google Patents

Ensemble de mesure et procédé servant à détecter de manière magnétique un courant électrique, ainsi que véhicule comprenant un ensemble de mesure de ce type Download PDF

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Publication number
WO2019034390A1
WO2019034390A1 PCT/EP2018/070381 EP2018070381W WO2019034390A1 WO 2019034390 A1 WO2019034390 A1 WO 2019034390A1 EP 2018070381 W EP2018070381 W EP 2018070381W WO 2019034390 A1 WO2019034390 A1 WO 2019034390A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic field
conductor
sensor
measuring
measuring point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2018/070381
Other languages
German (de)
English (en)
Inventor
Werner Schiemann
Cyrille Brando
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2019034390A1 publication Critical patent/WO2019034390A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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

Definitions

  • Measuring arrangement and method for magnetically sensing an electric current and a vehicle with such a measuring arrangement Measuring arrangement and method for magnetically sensing an electric current and a vehicle with such a measuring arrangement
  • the present invention relates to a measuring arrangement and a method for magnetically sensing an electric current of an electrical conductor in the presence of a disturbing magnetic field. Furthermore, the invention comprises a
  • One of the possible alternatives for measuring currents are magnetic probes, which are increasingly being used more recently, usually Hall or fluxgate probes. These can be used directly or in a compensation arrangement.
  • a flux concentrator a magnetically highly conductive material, is used to image the conductor magnetic field generated by the electrical conductor as well as possible.
  • disturbing magnetic fields are kept away from the measuring range by the flux concentrator, so that the conductor magnetic field can be determined directly by a measurement by means of probes.
  • ASIC-based measuring arrangements are used, which dispense with such a flux concentrator in whole.
  • the metrological problem that the conductor magnetic field generated by the electrical conductor can be superimposed by a disturbance magnetic field.
  • Determination error or measurement error In particular, the earth's magnetic field comes into consideration as an interference magnetic field. For example, but also interference magnetic fields of other electrical conductors into consideration, which are located in the local environment of the electrical conductor to be measured.
  • Measuring point is located at a large distance, in which the conductor magnetic field has fallen to almost zero, so that only disturbance magnetic field is measured at this measuring point. At the other measuring point, the maximum field on the electrical conductor is measured. If one now forms the difference between the two measurement results, the contribution of the disturbance magnetic field is eliminated and one obtains the amount of the pure conductor magnetic field from which the electrical current can then be determined.
  • a disadvantage of this arrangement is that the interference magnetic field can change over such large distances and the difference formation does not correctly eliminate the interference magnetic field.
  • a conductor loop is formed in which, in addition to the current to be determined of the electrical conductor, an electrical conductor is guided with the same current in the opposite direction. Then, in each case the resulting magnetic field is determined via both conductors in the region of the maximum field strength, whereby the respectively generated conductor magnetic fields have a different sign due to the opposite current direction. Also in this case, then the disturbance magnetic field can be eliminated by subtraction.
  • a serious disadvantage is in this
  • a measuring arrangement for magnetically sensing an electric current of an electrical conductor in the presence of a
  • the measuring arrangement comprises a circuit board which extends in an x-y plane. Furthermore, the measuring arrangement comprises an electrical conductor which is integrated in the printed circuit board and extends in ay direction, wherein a current flows through the electrical conductor, which generates a conductor magnetic field around the electrical conductor. Furthermore, the measuring arrangement comprises a first sensor, which is designed to measure a z-component of a resulting magnetic field, which results from superposition of the conductor magnetic field with the interference magnetic field, in a first measuring point located within the conductor magnetic field. Furthermore, the measuring arrangement comprises a second sensor, which is designed to measure a z-component of the resulting magnetic field in a second measuring point located within the generated conductor magnetic field, which is spatially separated from the first measuring point.
  • the conductor magnetic field is the field generated by the electrical conductor.
  • the resulting magnetic field which at the
  • Measuring points corresponds to the superposition of the conductor magnetic field with the interference magnetic field. This distinction will be made in the following
  • a measuring point is not strictly to be understood as a point in space, but rather as a spatially localized measuring range around a point. Small deviations from the measuring points are thus encompassed by the invention.
  • the conductor magnetic field measurement generated by the electrical current has a different value at the second measuring point than that from the first measuring point.
  • the measuring arrangement according to the invention has the advantage that the
  • Measuring device over the prior art without conductor loop manages, as is measured directly on only one conductor at two measuring points, and thus also for modern applications with high
  • the measuring points are within the conductor magnetic field and not outside, so that both measuring points are positioned sufficiently close to each other, so that even spatially varying perturbation magnetic fields can be eliminated correctly, see Introduction.
  • the first sensor is positioned such that the z component of the conductor magnetic field in the first measuring point is minimal.
  • minimizing means that the z component of the conductor magnetic field disappears there.
  • the fact that the z-component of the conductor magnetic field is minimal or disappears is also not to be interpreted strictly, but it also includes that due to
  • Positioning inaccuracies may also be certain deviations from the zero value, which in the range of the typical tolerances of a
  • Measuring arrangement lie. This results in the advantage that the generated conductor magnetic field in the first measuring point has no z-component, so that only the interference magnetic field is measured in this area. Thus, the contribution of the disturbance magnetic field is known.
  • the second sensor can also be positioned such that the second measuring point is positioned between the first measuring point of the first sensor and a point in which the z-component of the conductor magnetic field is oriented largely parallel to the z-direction.
  • the second one is positioned between the first measuring point of the first sensor and a point in which the z-component of the conductor magnetic field is oriented largely parallel to the z-direction.
  • Positioning point of minimum conductor field strength positioned.
  • the sensors move closer together spatially, which means that even spatially more strongly changing interference magnetic fields can be correctly eliminated.
  • sensors with a lower maximum flux density can be used.
  • the electrical conductor may also comprise a through-hole extending in the direction of the z-direction and the electrical conductor in two
  • Interference magnetic field can be measured directly.
  • the first sensor may be positioned such that the first measuring point is located above an edge region of the electrical conductor with respect to a z-direction, and the second sensor is positioned such that the second measuring point with respect to a z-direction above a different with respect to the first measuring point
  • Edge region of the electrical conductor is located.
  • the measuring points are positioned on opposite edge regions of the electrical conductor. This results in maximum strengths of the measured variables, since in the areas of the conductor magnetic fields are maximum with different
  • the measuring arrangement may comprise an evaluation unit which is designed to determine the electrical current flowing through the electrical conductor by means of a difference between the z component of the resulting magnetic field measured by the first sensor and the z component of the resulting magnetic field measured by the second sensor. As a result, the disturbance magnetic field is calculated and determined by means of the resulting value of the electric current.
  • an evaluation unit which is designed to determine the electrical current flowing through the electrical conductor by means of a difference between the z component of the resulting magnetic field measured by the first sensor and the z component of the resulting magnetic field measured by the second sensor.
  • the first sensor and the second sensor can be integrated on one chip. This is the preferred realization of such a measuring arrangement.
  • the evaluation unit can also be integrated on the chip. It also uses ASIC-based applications.
  • a vehicle is proposed, which has a measuring arrangement for magnetically sensing an electric current of an electric motor Conductor in the presence of interference magnetic fields.
  • the vehicle is a hybrid vehicle or an electrically powered vehicle.
  • the measurement arrangements are particularly useful.
  • Disturbance magnetic field basically includes the following steps. First, a circuit board is provided which extends in an x-y plane. Further, an electrical conductor is provided which is integrated in the circuit board and extends in a y-direction, wherein a current flows through the electrical conductor, which generates a conductor magnetic field around the electrical conductor. In a further step, a z-component of a resulting magnetic field is measured by means of a first sensor in a first measuring point located within the conductor magnetic field. In a further step, a z-component of a resulting magnetic field is measured by means of a second sensor in a second measuring point located within the conductor magnetic field, which is spatially separated from the first measuring point. In a further step, the first sensor is positioned such that the z component of the conductor magnetic field is minimal in the first measuring point.
  • FIG. 2 shows a measuring arrangement for magnetically sensing an electrical current of an electrical conductor in the presence of a disturbing magnetic field according to a second embodiment
  • FIG. 3 shows a measuring arrangement for magnetically sensing an electrical current of an electrical conductor in the presence of a disturbing magnetic field according to a third embodiment
  • FIG. 4 shows a measuring arrangement for magnetically sensing an electrical current of an electrical conductor in the presence of a disturbing magnetic field according to a fourth embodiment, FIG.
  • Figure 5 is a schematic representation of an exemplary measuring arrangement for magnetically sensing an electrical current of an electrical conductor in the presence of a disturbance magnetic field as a cross section.
  • FIG. 1 is a measuring arrangement 1 for the magnetic sensing of an electric current of an electrical conductor 20 in the presence of a
  • Störmagnetfeldes shown according to a first embodiment.
  • the electrical conductor 20 is hereby exemplified as a cylinder with a round
  • the conductor magnetic field 24 is sketched by way of example as a circular closed field line, wherein, depending on the geometry of the electrical conductor, differently shaped closed field lines are also encompassed by the invention.
  • the field referred to as the resulting magnetic field corresponds to the field generated by conductor magnetic field 24 and a disturbance magnetic field by superposition.
  • the resulting magnetic field ie the superimposed field
  • the measuring points 32, 42 are not strictly to be regarded as points, but also include a spatially localized measuring range around the respective measuring point 32, 42 around.
  • the disappearance of the z-component at the first measuring point 32 is likewise not to be understood strictly, but rather also includes that due to positioning inaccuracies small deviations from the zero value are also included.
  • the measurement arrangement 1 has the advantage that the generated conductor magnetic field 24 has no z component at the first measurement point 32, so that only the interference magnetic field is measured there. In addition, the lie
  • the measuring arrangement may further comprise an evaluation unit 50.
  • This evaluation unit 50 can be designed to determine the electric current from the z components of the resulting magnetic field measured by the sensors 30, 40.
  • this evaluation unit 50 can be advantageously designed to be measured by means of a difference between the z component of the resulting magnetic field measured by the first sensor 30 and the z component of the resulting z component measured by the second sensor 40
  • Suitable sensors 30, 40 are, for example, Hall probes or gate flux probes, the invention not being restricted thereto.
  • FIG. 2 shows a measuring arrangement 1 for magnetically sensing an electric current of an electrical conductor in the presence of a
  • the second sensor 40 is positioned such that the second measuring point 42 is oriented between the first measuring point 32 of the first sensor 30 and a point in which the z component of the conductor magnetic field 24 is oriented largely parallel to the z direction. is positioned.
  • the second measuring point 42 and thus also the second sensor 40 are moved closer to the first measuring point 32 or first sensor with respect to a measuring point at which a maximum field strength in the z-direction can be measured, see in this respect comparatively FIG.
  • sensors 30, 40 can be used with a lower maximum flux density.
  • the first sensor 30 may also be positioned such that the first measurement point 32 is located centrally above the through-hole 25 with respect to a z-direction 23. Even in this area, the conductor magnetic field 24 is minimal, so that the disturbance magnetic field can be detected.
  • the first sensor 30 may be positioned such that the conductor magnetic field 24 is oriented largely parallel to the z-direction 23 in the first measuring point 32
  • the second sensor 40 may be positioned such that the conductor magnetic field 24 in the second measuring point 42 largely parallel to z Direction 23 is oriented, wherein the conductor magnetic field in the second
  • Sign difference receives a corresponding double conductor magnetic field, so that it can be converted directly to the electric current from the evaluation unit 50.
  • Sign difference receives a corresponding double conductor magnetic field, so that it can be converted directly to the electric current from the evaluation unit 50.
  • Measuring arrangement 1 for the magnetic sensing of an electrical current of an electrical conductor 20 in the presence of a disturbance magnetic field shown as a cross section.
  • the measuring arrangement 1 shows the printed circuit board 10 as a cross section with an integrated electrical conductor 20.
  • the electrical conductor 20 on a first outer side 12 of the printed circuit board 10, which a second
  • the first sensor 30 and the second Sensor 40 are exemplary of the first outer side 12 of the circuit board 10 facing. However, the invention is not limited thereto.
  • the electrical conductor 20 can also be integrated on the second outer side 14 of the printed circuit board 10 or can also be integrated between the first outer side 12 and the second outer side 14, for example centrally.
  • the electrical conductor 20 is designed as an area, for example, that is, the cross section of the electrical conductor 20 corresponds to a rectangle. But other cross sections such as round cross sections or vertical cross sections are encompassed by the invention.
  • Measuring points 32, 42 and two sensors 30, 40 limited. For example, three or more measuring points or three or more sensors may be used. Then, an evaluation unit 50 can determine the electric current by means of more complex formula relationships. As a result, for example, a simplified elimination of the disturbance magnetic field
  • the invention also describes a vehicle 100 which comprises a measuring arrangement 1 for magnetically sensing an electrical current of an electrical conductor 20 in the presence of interference magnetic fields.
  • the vehicle 100 is a hybrid vehicle or an electrically powered vehicle.
  • a plurality of current-carrying electrical conductors 20 is needed, is such
  • Measuring arrangement 1 particularly useful.

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

Abstract

L'invention concerne un ensemble de mesure servant à détecter de manière magnétique un courant électrique, lequel comprend une carte de circuits imprimés (10) et un conducteur (20) électrique qui est intégré dans la carte de circuits imprimés (10) et s'étend dans une direction y (22). Par ailleurs, l'ensemble de mesure (1) comprend un premier capteur (30), qui est réalisé pour mesurer, sur un premier point de mesure (32) se trouvant à l'intérieur du champ magnétique de conducteur (24), une composante z d'un champ magnétique en résultant, lequel résulte d'une superposition du champ magnétique de conducteur (24) et du champ magnétique parasite. Par ailleurs, l'ensemble de mesure (1) comprend un deuxième capteur (40) qui est réalisé pour mesurer, sur un deuxième point de mesure (42) se trouvant à l'intérieur du champ magnétique de conducteur généré, lequel est séparé spatialement du premier point de mesure (32), une composante z du champ magnétique en résultant. L'invention concerne en outre un procédé servant à détecter de manière magnétique un courant électrique.
PCT/EP2018/070381 2017-08-14 2018-07-27 Ensemble de mesure et procédé servant à détecter de manière magnétique un courant électrique, ainsi que véhicule comprenant un ensemble de mesure de ce type Ceased WO2019034390A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017214142.5A DE102017214142A1 (de) 2017-08-14 2017-08-14 Messanordnung und Verfahren zum magnetischen Sensieren eines elektrischen Stroms sowie ein Fahrzeug mit einer solchen Messanordnung
DE102017214142.5 2017-08-14

Publications (1)

Publication Number Publication Date
WO2019034390A1 true WO2019034390A1 (fr) 2019-02-21

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Application Number Title Priority Date Filing Date
PCT/EP2018/070381 Ceased WO2019034390A1 (fr) 2017-08-14 2018-07-27 Ensemble de mesure et procédé servant à détecter de manière magnétique un courant électrique, ainsi que véhicule comprenant un ensemble de mesure de ce type

Country Status (2)

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DE (1) DE102017214142A1 (fr)
WO (1) WO2019034390A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102023124782B3 (de) 2023-09-13 2025-03-06 AD-TEC GmbH Stromsensoranordnung und Fahrzeugbatterie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043171A1 (de) * 1999-09-07 2001-04-12 Yazaki Corp Stromdetektor und elektronischer Anschlusskasten unter Verwendung desselben
WO2002056032A2 (fr) * 2001-01-09 2002-07-18 Robert Bosch Gmbh Dispositif, amperemetre et vehicule motorise
US20090021249A1 (en) * 2007-07-19 2009-01-22 Sachin Kumar Core-less current sensor
EP2437072A2 (fr) * 2010-10-01 2012-04-04 Melexis Technologies NV Capteur de courant
WO2015133621A1 (fr) * 2014-03-07 2015-09-11 日立金属株式会社 Détecteur d'intensité de courant
DE202016100116U1 (de) * 2015-01-15 2016-03-03 Infineon Technologies Ag Stromsensor-Positionierungsfehlerkorrektur unter Anwendung von Hall-Hilfselementen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012029439A1 (fr) * 2010-08-31 2012-03-08 アルプス・グリーンデバイス株式会社 Détecteur de courant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043171A1 (de) * 1999-09-07 2001-04-12 Yazaki Corp Stromdetektor und elektronischer Anschlusskasten unter Verwendung desselben
WO2002056032A2 (fr) * 2001-01-09 2002-07-18 Robert Bosch Gmbh Dispositif, amperemetre et vehicule motorise
US20090021249A1 (en) * 2007-07-19 2009-01-22 Sachin Kumar Core-less current sensor
EP2437072A2 (fr) * 2010-10-01 2012-04-04 Melexis Technologies NV Capteur de courant
WO2015133621A1 (fr) * 2014-03-07 2015-09-11 日立金属株式会社 Détecteur d'intensité de courant
DE202016100116U1 (de) * 2015-01-15 2016-03-03 Infineon Technologies Ag Stromsensor-Positionierungsfehlerkorrektur unter Anwendung von Hall-Hilfselementen

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