DE102004042719A1 - Current sensor has measurement resistance made as narrower length or meander integrated in same material as conductor - Google Patents
Current sensor has measurement resistance made as narrower length or meander integrated in same material as conductor Download PDFInfo
- Publication number
- DE102004042719A1 DE102004042719A1 DE200410042719 DE102004042719A DE102004042719A1 DE 102004042719 A1 DE102004042719 A1 DE 102004042719A1 DE 200410042719 DE200410042719 DE 200410042719 DE 102004042719 A DE102004042719 A DE 102004042719A DE 102004042719 A1 DE102004042719 A1 DE 102004042719A1
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- DE
- Germany
- Prior art keywords
- conductor
- measuring resistor
- current sensor
- sensor according
- measuring
- 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.)
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/44—Modifications of instruments for temperature compensation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/003—Measuring mean values of current or voltage during a given time interval
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Description
Die Erfindung betrifft einen Stromsensor mit einem Messwiderstand gemäß dem Oberbegriff des Patentanspruchs 1.The The invention relates to a current sensor with a measuring resistor according to the preamble of claim 1
Derartige Messwiderstände von Stromsensoren zur Bestimmung der in einem Stromleiter fließenden Ströme (typischer Messbereich 1 mA bis 1A) bestehen üblicherweise aus einem speziellen, vom Material des Stromleiters verschiedenen Widerstandsmaterial, wobei der Wert des Messwiderstands insbesondere durch die Wahl des Widerstandsmaterials eingestellt wird. Hierdurch entstehen allerdings an den gelöteten oder geschweißten Verbindungsstellen vom Widerstandsmaterial zum Material des Stromleiters Thermospannungen, die zur Erfassung hinreichender genauer Messwerte des im Stromleiter fließenden Stroms kompensiert werden müssen. Nachteilig ist bedingt durch die Verbindungsstellen vom Widerstandsmaterial zum Material des Stromleiters somit der hohe Aufwand bei der Herstellung des Stromsensors und beim Messvorgang mit dem Stromsensor.such Sense resistors of current sensors for determining the currents flowing in a conductor (more typically Measuring range 1 mA to 1A) usually consist of a special, the material of the conductor different resistance material, wherein the value of the measuring resistance in particular by the choice of Resistor material is adjusted. However, this results at the soldered or welded Connections from the resistor material to the material of the conductor Thermo-voltages, which are used to acquire sufficient accurate measured values of the current flowing in the conductor Electricity must be compensated. The disadvantage is due to the connection points of the resistance material the material of the conductor thus the high cost in the production of the current sensor and during the measurement process with the current sensor.
Der Erfindung liegt die Aufgabe zugrunde, einen Stromsensor mit einem Messwiderstand gemäß dem Oberbegriff des Patentanspruchs 1 anzugeben, bei dem eine einfache Herstellung und eine einfache Messung ermöglicht wird.Of the Invention is based on the object, a current sensor with a Measuring resistor according to the preamble of the patent claim 1, in which a simple production and a simple measurement allows becomes.
Diese Aufgabe wird erfindungsgemäß durch das Kennzeichen des Patentanspruchs 1 gelöst.These The object is achieved by the Characteristics of claim 1 solved.
Vorteilhafte Ausgestaltungen der Erfindung sind Bestandteil der weiteren Patentansprüche.advantageous Embodiments of the invention are part of the further claims.
Beim vorgestellten Stromsensor ist der Messwiderstand (Shunt) erfindungsgemäß als mit dem Stromleiter direkt verbundenes (in unmittelbarem Kontakt befindliches) Strukturteil aus dem gleichen Material wie der Stromleiter ausgebildet, wobei der Messwiderstand im Stromleiter integriert oder direkt (unmittelbar) am Stromleiter angeordnet ist. Der Widerstandswert des Messwiderstands wird insbesondere durch die geometrische Form des Strukturteils festgelegt. Daneben wird der Widerstandswert des Messwiderstands auch durch den Temperaturkoeffizienten des Materials des Stromleiters und damit des Messwiderstands beeinflusst, so dass bei der Messung des Stromwerts auch die Temperatur bestimmt und der gemessene Stromwert entsprechend korrigiert wird; dies kann insbesondere mittel einer zur Ermittlung des Stromwerts vorgesehenen Auswerteeinheit (Auswerteelektronik) erfolgen. Als Material des Stromleiters und damit auch des Messwiderstands wird insbesondere Kupfer herangezogen.At the presented current sensor is the measuring resistor (shunt) according to the invention as with the Electricity conductor directly connected (in direct contact) Structural part made of the same material as the current conductor, where the measuring resistor is integrated in the conductor or directly (directly) is arranged on the conductor. The resistance value of the measuring resistor in particular by the geometric shape of the structural part established. Next to it is the resistance value of the measuring resistor also by the temperature coefficient of the material of the conductor and thus influences the measuring resistance, so that during the measurement the current value also determines the temperature and the measured current value is corrected accordingly; This can be done in particular by means of a Determination of the current value intended evaluation unit (evaluation electronics) respectively. As material of the conductor and thus also of the measuring resistor in particular copper is used.
Das als Messwiderstand vorgesehene Strukturteil kann als in einem bestimmten Abschnitt des Stromleiters ausgebildete Verjüngung im Querschnitt des Stromleiters realisiert sein, die aus dem Material des Stromleiters mittels Stanzen und/oder Pressen gefertigt werden kann. Der Wert des Messwiderstands wird durch die geometrische Form der Verjüngung (Länge, Breite, Höhe) eingestellt, wobei die Spannung des Messwiderstands an den Kanten der Verjüngung beim Übergang vom reduzierten Querschnitt des Messwiderstands zum Querschnitt des Stromleiters an bestimmten Messspannungsabgriffen abgenommen wird.The As a measuring resistor provided structural part can be considered in a specific Section of the conductor formed taper in the cross section of the conductor be realized, from the material of the conductor by means of punching and / or pressing can be made. The value of the measuring resistor is set by the geometric shape of the taper (length, width, height), the voltage of the measuring resistor at the edges of the taper at the transition from the reduced cross section of the measuring resistor to the cross section of the conductor removed at certain Meßspannungsabgriffen becomes.
Alternativ hierzu kann das als Messwiderstand vorgesehene Strukturteil auch durch als in einem bestimmten Abschnitt des Stromleiters ausgebildete Einschnitte im Stromleiter realisiert sein, die insbesondere eine mäanderförmige Struktur aufweisen können. Die Länge des als Messwiderstand wirksamen Bereichs wird entsprechend des Querschnitts des Stromleiters und des gewünschten Widerstandswerts vorgegeben. Die Messspannungsabgriffe und die zur Aufnahme der Auswerteeinheit (Aus werteelektronik) dienenden Befestigungspunkte können bsp. mittels Einpressstiften realisiert werden; vorzugsweise werden die Messspannungsabgriffe und die Befestigungspunkte direkt aus dem Material des Messwiderstands und damit des Stromleiters herausgearbeitet.alternative For this purpose, provided as a measuring resistor structural part also by being formed in a certain portion of the conductor Be made incisions in the conductor, in particular a meandering structure can have. The length of the effective as a measuring resistor range is corresponding to the Cross-section of the conductor and the desired resistance value specified. The measuring voltage taps and for receiving the evaluation unit (From electronic) serving attachment points can bsp. be realized by means of injection pins; Preferably, the Measuring voltage taps and the attachment points directly from the Material of the measuring resistor and thus the current conductor worked out.
Weiterhin kann das als Messwiderstand vorgesehene Strukturteil durch eine auf einen Trägerkörper (bsp. eine Leiterplatte) aufgebrachte, mit dem Stromleiter direkt über Kontaktflächen zu verbindende Widerstandsschicht realisiert werden, bsp. durch ein auf den Trägerkörper auflaminiertes Kupferblech. Die Kontaktflächen zwischen dem Messwiderstand und dem Stromleiter sind auf geeignete Art und Weise niederohmig realisiert, bsp. durch Kaltverschweißen. Der Wert des Messwiderstands wird durch den Querschnitt der Widerstandsschicht und der Position der vom Messwiderstand zum Trägerkörper geführten Spannungsabgriffe eingestellt. Hierbei ist eine Kalibrierung des Messwiderstands bei der Herstellung des Trägerkörpers (bsp. der Leiterplatte) möglich, da der Messwiderstand integrierter Bestandteil des mit dem Stromleiter verbundenen Trägerkörpers der Auswerteeinheit ist.Farther can provided as a measuring resistor structural part by a on a support body (ex. a printed circuit board), with the current conductor directly over contact surfaces connecting resistance layer can be realized, eg. through a laminated to the carrier body Copper sheet. The contact surfaces between the measuring resistor and the conductor are suitable Low-impedance way realized, eg. by cold welding. Of the Value of the measuring resistor is determined by the cross section of the resistance layer and the position of the guided by the measuring resistor to the carrier body voltage taps set. Here is a calibration of the measuring resistor during manufacture of the carrier body (ex. the printed circuit board), because the measuring resistor integrated part of the with the conductor connected carrier body of Evaluation unit is.
Vorteilhafterweise ist der vorgestellte Stromsensor auf einfache Weise und mit geringen Kosten herstellbar; da keine Thermopaare beim Übergang vom Stromleiter zum Messwiderstand gebildet werden, entstehen auch keine aufwendig zu kompensierenden Thermospannungen.advantageously, is the presented current sensor in a simple way and with low Cost to produce; because no thermocouples at the transition from the conductor to Measuring resistor are formed, no consuming too compensating thermoelectric voltages.
Im
Zusammenhang mit der Zeichnung soll die Erfindung näher erläutert werden.
Hierbei zeigen die
Gemäß der
Gemäß der
Bei
einem einzustellenden Widerstandswert R für den Messwiderstand
Die
Messspannungsabgriffe
Mittels
des Messwiderstands
Gemäß der
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410042719 DE102004042719A1 (en) | 2004-09-03 | 2004-09-03 | Current sensor has measurement resistance made as narrower length or meander integrated in same material as conductor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410042719 DE102004042719A1 (en) | 2004-09-03 | 2004-09-03 | Current sensor has measurement resistance made as narrower length or meander integrated in same material as conductor |
Publications (1)
Publication Number | Publication Date |
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DE102004042719A1 true DE102004042719A1 (en) | 2005-09-29 |
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Family Applications (1)
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DE200410042719 Withdrawn DE102004042719A1 (en) | 2004-09-03 | 2004-09-03 | Current sensor has measurement resistance made as narrower length or meander integrated in same material as conductor |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006087342A1 (en) * | 2005-02-16 | 2006-08-24 | Continental Teves Ag & Co. Ohg | Device for detecting electric currents |
EP2042879A1 (en) | 2007-09-28 | 2009-04-01 | MAGNETI MARELLI SISTEMI ELETTRONICI S.p.A. | Battery current sensor for a motor vehicle |
EP2068402A1 (en) | 2007-10-30 | 2009-06-10 | Magneti Marelli S.p.A. | A device for measuring the current of a battery on board of a motor-vehicle and a method for assembling the device |
CN102928657A (en) * | 2012-10-31 | 2013-02-13 | 华为技术有限公司 | Current measurement method and device |
DE102013106216A1 (en) * | 2013-06-14 | 2014-12-18 | Sma Solar Technology Ag | Measuring device for current measurement |
WO2016055277A1 (en) * | 2014-10-09 | 2016-04-14 | Conti Temic Microelectronic Gmbh | Device and method for measuring a current in a conductor track of a printed circuit board |
US9482696B2 (en) | 2012-10-31 | 2016-11-01 | Huawei Technologies Co., Ltd. | Method and device for measuring current |
WO2017089228A1 (en) * | 2015-11-27 | 2017-06-01 | Robert Bosch Gmbh | Current sensor and battery comprising such a current sensor |
WO2021185463A1 (en) * | 2020-03-20 | 2021-09-23 | Abb Schweiz Ag | High-power busbar with controllable resistance |
EP3879276A4 (en) * | 2019-01-10 | 2022-08-17 | Suncall Corporation | Shunt sensor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19501719A1 (en) * | 1995-01-20 | 1996-08-01 | Siemens Ag | Measuring shunt with auxiliary current branch and parallel measuring current branch |
DE19838974A1 (en) * | 1998-08-27 | 2000-03-02 | Bosch Gmbh Robert | Electrical circuit with a device for detecting a current variable |
DE10041879A1 (en) * | 2000-08-25 | 2002-03-14 | Hella Kg Hueck & Co | Load current measurement method in on-board power supply of vehicle, involves connecting fuse element parallel to load, where fuse element acts as shunt resistor |
DE10310503A1 (en) * | 2003-03-11 | 2004-09-23 | Robert Bosch Gmbh | Current measurement arrangement has a test current source of known value that permits the calibration of a measurement resistance prior to, or during, current measurement processes |
-
2004
- 2004-09-03 DE DE200410042719 patent/DE102004042719A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19501719A1 (en) * | 1995-01-20 | 1996-08-01 | Siemens Ag | Measuring shunt with auxiliary current branch and parallel measuring current branch |
DE19838974A1 (en) * | 1998-08-27 | 2000-03-02 | Bosch Gmbh Robert | Electrical circuit with a device for detecting a current variable |
DE10041879A1 (en) * | 2000-08-25 | 2002-03-14 | Hella Kg Hueck & Co | Load current measurement method in on-board power supply of vehicle, involves connecting fuse element parallel to load, where fuse element acts as shunt resistor |
DE10310503A1 (en) * | 2003-03-11 | 2004-09-23 | Robert Bosch Gmbh | Current measurement arrangement has a test current source of known value that permits the calibration of a measurement resistance prior to, or during, current measurement processes |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006087342A1 (en) * | 2005-02-16 | 2006-08-24 | Continental Teves Ag & Co. Ohg | Device for detecting electric currents |
EP2042879A1 (en) | 2007-09-28 | 2009-04-01 | MAGNETI MARELLI SISTEMI ELETTRONICI S.p.A. | Battery current sensor for a motor vehicle |
EP2068402A1 (en) | 2007-10-30 | 2009-06-10 | Magneti Marelli S.p.A. | A device for measuring the current of a battery on board of a motor-vehicle and a method for assembling the device |
CN102928657B (en) * | 2012-10-31 | 2015-07-22 | 华为技术有限公司 | Current measurement method and device |
US9482696B2 (en) | 2012-10-31 | 2016-11-01 | Huawei Technologies Co., Ltd. | Method and device for measuring current |
EP2752673A1 (en) * | 2012-10-31 | 2014-07-09 | Huawei Technologies Co., Ltd. | Method and device for measuring current |
EP2752673A4 (en) * | 2012-10-31 | 2014-07-30 | Huawei Tech Co Ltd | Method and device for measuring current |
WO2014067259A1 (en) * | 2012-10-31 | 2014-05-08 | 华为技术有限公司 | Method and device for measuring current |
CN102928657A (en) * | 2012-10-31 | 2013-02-13 | 华为技术有限公司 | Current measurement method and device |
DE102013106216A1 (en) * | 2013-06-14 | 2014-12-18 | Sma Solar Technology Ag | Measuring device for current measurement |
DE102013106216B4 (en) | 2013-06-14 | 2019-03-28 | Sma Solar Technology Ag | Measuring device for current measurement |
WO2016055277A1 (en) * | 2014-10-09 | 2016-04-14 | Conti Temic Microelectronic Gmbh | Device and method for measuring a current in a conductor track of a printed circuit board |
WO2017089228A1 (en) * | 2015-11-27 | 2017-06-01 | Robert Bosch Gmbh | Current sensor and battery comprising such a current sensor |
CN108700616A (en) * | 2015-11-27 | 2018-10-23 | 罗伯特·博世有限公司 | Current sensor and battery with this current sensor |
US11088399B2 (en) | 2015-11-27 | 2021-08-10 | Robert Bosch Gmbh | Current sensor and battery comprising such a current sensor |
CN108700616B (en) * | 2015-11-27 | 2021-09-17 | 罗伯特·博世有限公司 | Current sensor and battery having the same |
EP3879276A4 (en) * | 2019-01-10 | 2022-08-17 | Suncall Corporation | Shunt sensor |
WO2021185463A1 (en) * | 2020-03-20 | 2021-09-23 | Abb Schweiz Ag | High-power busbar with controllable resistance |
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OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8130 | Withdrawal |