EP3948310A1 - Messanordnung zum erfassen eines gleichstroms - Google Patents
Messanordnung zum erfassen eines gleichstromsInfo
- Publication number
- EP3948310A1 EP3948310A1 EP20728950.5A EP20728950A EP3948310A1 EP 3948310 A1 EP3948310 A1 EP 3948310A1 EP 20728950 A EP20728950 A EP 20728950A EP 3948310 A1 EP3948310 A1 EP 3948310A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- magnetic field
- electrical
- direct current
- measuring arrangement
- field sensors
- 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.)
- Pending
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 196
- 230000035699 permeability Effects 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000003302 ferromagnetic material Substances 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005355 Hall effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- the external magnetic field (s) are not displaced, but homogenized, there are two superimposed magnetic fields at the location of the magnetic field sensor: (a) the magnetic field to be measured, which is caused by the electrical direct current flowing through the electrical line, and (b ) the external magnetic field (s) that act as interference fields. Since there are two unknown variables, namely two magnetic fields of different origin, at least two magnetic field sensors are required so that the magnetic field to be measured can be differentiated from the external magnetic fields and determined, e.g. can be calculated using an algorithm in a processing unit.
- disruptive external inhomogeneous magnetic fields for. B. in the form of arcs or otherwise distorted fields, are homogenized at the location of the magnetic field sensors.
- the interfering external magnetic field is not diverted or shielded from the measuring arrangement, but is instead passed through the measuring arrangement in this homogenized form.
- the filter elements have a ferromagnetic material with a permeability number pr> 1.
- the filter elements preferably have a ferromagnetic material which has a permeability number p r > 1000 at a magnetic field strength H of 1000 A / m.
- the filter elements are made of silicon iron or of electrical steel M 330-50 A or M 530-50 A according to DIN EN 10106: 2016-03.
- the position of the filter elements does not have to be symmetrical to the current measuring unit. II) The greater the lateral expansion of the filter elements, the less disturbing magnetic fields can penetrate "sideways" into the measuring arrangement. III) The thicker the filter elements, the lower their magnetic fields Saturation. In the area of magnetic saturation, the magnetic conductivity decreases sharply; therefore, magnetic saturation is undesirable in this application.
- the current measuring unit comprises a computing unit, for example a processor, which calculates the direct current flowing in the electrical line from the magnetic field signals of the magnetic field sensors.
- the computing unit and the current measuring unit and / or the electrical line are preferably arranged on the same printed circuit board.
- the magnetic field signals are available as Hall voltage U H.
- the homogenized external magnetic field delivers the same Hall voltage at every location of the magnetic field to be measured, ie a constant offset of the Hall voltages which the magnetic field to be measured causes.
- Fig. 1 shows a section through a arranged on a first upper surface 31 of a circuit board 3 rectilinear electrical line 5 in the form of a busbar of square cross-section, along the longitudinal axis, caused by a voltage difference on the electrical line 5, an electrical direct current flows .
- the technical current direction, d. H. from the electrical plus to the minus pole, is in the plane of the drawing, so that the direction of rotation of the field lines 6 of the magnetic field generated by the current flow is clockwise according to the corkscrew rule.
- FIG. 2 shows the case that the magnetic field 6 generated by the current flow is superimposed by an external, homogeneous magnetic field 7, which is, for example, the earth's magnetic field or the magnetic field of a permanent magnet or which is provided by another, not shown current flowing line is caused. Since the inhomogeneity of the external magnetic field 7 which is superimposed on the magnetic field 6 to be measured, ie the useful signal, is unknown, as is the case in practice, it is impossible to determine the strength of the magnetic field 6 to be measured alone . A correct indication of the strength of the electrical line 5 flowing electrical direct current is not possible, please include.
- FIG. 6 is a section through a further embodiment of a measuring arrangement according to the invention.
- a Lei terplatte 3 Internally in a Lei terplatte 3 is a straight electrical line 5 square cross-section is arranged, along the longitudinal axis, caused by a voltage difference applied to the electrical line 5, an electrical direct current flows.
- the technical direction of current, ie from the electrical plus to the minus pole, is in the plane of the drawing, so that the direction of rotation of the field lines 6 of the Flux generated magnetic field is clockwise according to the corkscrew rule.
- a current measurement module 2 is arranged on a surface 32 of the printed circuit board 3 and has four Hall sensors 1 a to 1 d arranged in a row across the electrical line 5 as magnetic field sensors. These Hall sensors la to ld record the Hall voltage U H occurring in the Hall sensor, which is proportional to the field strength of the magnetic field and thus proportional to the conductor current, and send the voltage values via a signal line 14 to a processing unit 12, where the strength is derived from the voltage values collected of the direct electric current flowing in the electric line 5 is calculated.
- the Hall sensors arranged at positions lb and lc are aligned such that they measure the magnetic field strength of the magnetic field 7 indicated with G only in a transverse direction indicated with.
- the Hall sensor arranged at a first position lb measures only the transverse component G b 1 of the magnetic field strength G b present at the first position lb, while the parallel component G b H does not contribute to the signal of the Hall sensor.
- the Hall sensor arranged at a second position lc measures only the transverse component G c 1 of the magnetic field strength G c present at the second position lc, which due to the course of the magnetic field 7 is identical to the magnetic field strength G c .
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19174895.3A EP3739345A1 (de) | 2019-05-16 | 2019-05-16 | Erfassen eines in einer elektrischen leitung fliessenden elektrischen stroms |
PCT/EP2020/062806 WO2020229326A1 (de) | 2019-05-16 | 2020-05-08 | Messanordnung zum erfassen eines gleichstroms |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3948310A1 true EP3948310A1 (de) | 2022-02-09 |
Family
ID=66597514
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19174895.3A Withdrawn EP3739345A1 (de) | 2019-05-16 | 2019-05-16 | Erfassen eines in einer elektrischen leitung fliessenden elektrischen stroms |
EP20728950.5A Pending EP3948310A1 (de) | 2019-05-16 | 2020-05-08 | Messanordnung zum erfassen eines gleichstroms |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19174895.3A Withdrawn EP3739345A1 (de) | 2019-05-16 | 2019-05-16 | Erfassen eines in einer elektrischen leitung fliessenden elektrischen stroms |
Country Status (5)
Country | Link |
---|---|
US (1) | US12013418B2 (de) |
EP (2) | EP3739345A1 (de) |
CN (1) | CN113994219A (de) |
DE (1) | DE112020002405A5 (de) |
WO (1) | WO2020229326A1 (de) |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000258464A (ja) * | 1999-03-09 | 2000-09-22 | Mitsubishi Materials Corp | 電流センサ |
DE20017512U1 (de) * | 2000-10-11 | 2001-02-08 | Honeywell Ag, 63067 Offenbach | Einrichtung zum Messen von Strom auf Leiterplatten |
US7164263B2 (en) * | 2004-01-16 | 2007-01-16 | Fieldmetrics, Inc. | Current sensor |
RS20060511A (en) * | 2006-09-06 | 2008-11-28 | Ametes Ag., | Sensor and procedure for measuring bus bar current with skin effect correction |
DE102007025505A1 (de) * | 2007-06-01 | 2008-12-04 | Epcos Ag | Anordnung zur Messung eines in einem elektrischen Leiter fließenden Stroms |
WO2009021076A1 (en) * | 2007-08-06 | 2009-02-12 | Yakymyshyn C | Slotted current transducer using magnetic field point sensors |
DE102009029209A1 (de) | 2009-09-04 | 2011-03-10 | Robert Bosch Gmbh | Stromsensor, Strommessmodul und Verfahren zur Strommessung |
JP2011164019A (ja) * | 2010-02-12 | 2011-08-25 | Alps Green Devices Co Ltd | 電流測定装置 |
US8400139B2 (en) * | 2010-03-26 | 2013-03-19 | Infineon Technologies Ag | Sensor package having a sensor chip |
DE102010043254A1 (de) | 2010-11-03 | 2012-05-03 | Siemens Aktiengesellschaft | Messsystem zur Überwachung mindestens einer Phase eines Systems |
US9063184B2 (en) * | 2011-02-09 | 2015-06-23 | International Business Machines Corporation | Non-contact current-sensing and voltage-sensing clamp |
DE102012012759A1 (de) * | 2012-06-27 | 2014-01-02 | Sensitec Gmbh | Anordnung zur Strommessung |
US9535098B2 (en) * | 2013-09-02 | 2017-01-03 | Senis Ag | Current transducer for measuring an electrical current |
JP2015194472A (ja) * | 2014-01-23 | 2015-11-05 | 株式会社デンソー | 電流検出システム |
DE102016210970A1 (de) * | 2016-06-20 | 2017-12-21 | Siemens Aktiengesellschaft | Vorrichtung und Verfahren zur Messung der Stromstärke eines einzelnen Leiters eines Mehrleitersystems |
EP3376238A1 (de) * | 2017-03-16 | 2018-09-19 | LEM Intellectual Property SA | Stromwandler mit magnetfeldgradientensensor |
-
2019
- 2019-05-16 EP EP19174895.3A patent/EP3739345A1/de not_active Withdrawn
-
2020
- 2020-05-08 CN CN202080044039.7A patent/CN113994219A/zh active Pending
- 2020-05-08 DE DE112020002405.9T patent/DE112020002405A5/de active Pending
- 2020-05-08 US US17/611,721 patent/US12013418B2/en active Active
- 2020-05-08 EP EP20728950.5A patent/EP3948310A1/de active Pending
- 2020-05-08 WO PCT/EP2020/062806 patent/WO2020229326A1/de active Search and Examination
Also Published As
Publication number | Publication date |
---|---|
CN113994219A (zh) | 2022-01-28 |
WO2020229326A1 (de) | 2020-11-19 |
EP3739345A1 (de) | 2020-11-18 |
US12013418B2 (en) | 2024-06-18 |
DE112020002405A5 (de) | 2022-01-27 |
US20230349955A1 (en) | 2023-11-02 |
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