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WO2000013031A1 - Circuit electrique comprenant un dispositif de detection de l'intensite de courant - Google Patents

Circuit electrique comprenant un dispositif de detection de l'intensite de courant Download PDF

Info

Publication number
WO2000013031A1
WO2000013031A1 PCT/DE1999/001248 DE9901248W WO0013031A1 WO 2000013031 A1 WO2000013031 A1 WO 2000013031A1 DE 9901248 W DE9901248 W DE 9901248W WO 0013031 A1 WO0013031 A1 WO 0013031A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
circuit according
line connection
electrical
lead frame
Prior art date
Application number
PCT/DE1999/001248
Other languages
German (de)
English (en)
Inventor
Lothar Borho
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 WO2000013031A1 publication Critical patent/WO2000013031A1/fr

Links

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

Definitions

  • the invention is based on an electrical circuit in which individual electronic or electrical components are connected by at least one electrical line and with a device for detecting the current strength in the line.
  • Devices for detecting a current variable are known on the market, in which the voltage drop across the ohmic resistor is measured by means of a measuring resistor (shunt) in a current-carrying line and a current variable is determined therefrom.
  • the tapped voltage is usually fed to an electronic evaluation system.
  • the measuring resistors are consequently separate components of the electrical circuits.
  • the measuring resistor is plugged onto a printed circuit board as an SMD component.
  • Measuring resistors are also freely wired or bonded.
  • these measuring resistors represent additionally required components which take up space on a printed circuit board and also increase the material costs.
  • the device according to the invention with the characterizing features of the main claim has the advantage that a measuring resistor for detecting a current variable can be dispensed with, since an already existing line connection, in particular a lead frame connection, is used between two electrical components as a device for detecting a current variable.
  • This advantageously saves costs by dispensing with an electrical component and the associated space savings in an electronics housing and by simpler production.
  • the competitive advantage thus results from an inexpensive product price.
  • the printed circuit board that controls the control current of circuit breakers through the use of a lead frame in the load circuit. Since the high load current is conducted via the lead frame - instead of the conductor tracks of the printed circuit board as before - the cross-sectional area for the line can be reduced for smaller control currents. In the usual circuit board with several current-carrying circuit board layers, the number of these circuit board layers can therefore be reduced, for example from a four-layer to a two-layer circuit board. It is also advantageous that the circuit board size and thus the unit costs are reduced.
  • the lead frame has two connections for the electrical connection of the two electrical components, and preferably also two taps, between which a potential difference can be tapped via the measuring path of the lead frame and can be fed to an evaluation electronics.
  • Punched grids are line connections of a predetermined geometry punched out of a conductive sheet of a certain thickness for the power supply and discharge from and to the electrical components.
  • the connection ends provided for this purpose can be bent out of the plane of the sheet. For example, copper sheet or the like is used.
  • the two connections of the lead frame and taps for current measurement can be easily punched out of the sheet and are particularly easy to manufacture.
  • the geometrical shape of the lead frame depends on the one hand on the arrangement of the electrical / electronic components and the taps and on the other hand on the current strengths occurring in the load circuit and conducted in the lead frame.
  • FIG. 1 shows a schematic representation of the device according to the invention.
  • FIG. 1 shows a sketched electronic circuit 10, in which two arbitrary electrical or electronic components 12 are picked out and shown by way of example as consumers or switches.
  • the components 12 represent motor winding, capacitor, transistor, resistor, coil or the like.
  • One between the two components 12, for example by a battery Electrical potential difference U1 leads to a current I to be measured through the line connection of the lead frame 14, which is electrically connected to the components 12 via connections 16.
  • Two further taps 18 near the connections 16, or at a suitable other point, are provided in order to tap a voltage U between them and a voltage that operates practically without power
  • measuring resistance of the line connection between the taps 18 reproduces.
  • the measuring resistor is therefore no longer installed as a separate component, but the lead frame 14, that is to say the connection between two electrical components 12 themselves, is used as the measuring resistor.
  • the resistance R of the line connection must be determined with sufficient accuracy and compared with the magnitude of the currents I to be measured. For example, with a very small resistance R, large measuring currents I are required in order to obtain an evaluable measuring voltage U between the taps 18 at all.
  • the resistance R is preferably adjusted by extending the path of the line connection. When punching the lead frame or using a laser, cuts can subsequently be made in the line connection, which lead to a defined extension of the current path or to a cross-sectional narrowing and thus to an increase in resistance.
  • the measurement resistance R of the lead frame is determined and compared, for example, by means of an impressed test current I and in particular at a predetermined test temperature, provided that the lead frame material has a temperature-dependent resistance. If a material of the lead frame with a temperature-dependent resistance R is used, then correction values depending on the desired measurement accuracy and the desired temperature measurement range may also be necessary, which are advantageously stored in an EEPROM of a microcontroller of the control unit 10 integrated on the motor or by a circuit with analog and / or digital switching elements or components (eg ASIC) with which the measurement voltage U is corrected as a function of temperature.
  • the temperature in the lead frame area is advantageously measured by a temperature sensor.
  • the correction variables correct the influence of the temperature-dependent resistance R on the measuring voltage U, for example over a temperature range from -40 ° to + 125 ° C.
  • the undesired temperature drift of the resistance R of the lead frame can be prevented by using a lead frame material with a relatively temperature-independent ohmic resistance.
  • a lead frame material with a relatively temperature-independent ohmic resistance is suitable for this. Consequently, the subsequent correction of the values of the measurement voltage U obtained by the measurement using the correction variables is no longer absolutely necessary here.
  • the lead frame parts 14 are, for example, still extrusion-coated with plastic.
  • the individual line connections of the lead frame are thus spatially fixed.
  • the components 12 are connected to the bent connections 16 which protrude from the plastic.
  • lead frame 14, circuit board and components 12 are cast in or for protection against dust and other environmental influences enclosed in a housing, consisting of the plastic-coated lead frame and a cover.
  • the circuit 10 according to the invention is used, for example, in controls for adjusting drives for windows or sunroofs or for climate and air control in motor vehicles.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

L'invention concerne un circuit électrique comprenant un dispositif permettant de détecter une intensité de courant (I). On utilise pas de résistance de mesure séparée mais une liaison en grille estampée déjà présente comme ligne électrique (14) reliant deux composants (12) du circuit électrique (10) lui-même. On réduit avantageusement les coûts en renonçant à un composant séparé et en réalisant un gain de place dans un boîtier électronique ainsi que par une fabrication simple.
PCT/DE1999/001248 1998-08-27 1999-04-28 Circuit electrique comprenant un dispositif de detection de l'intensite de courant WO2000013031A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19838974.4 1998-08-27
DE1998138974 DE19838974A1 (de) 1998-08-27 1998-08-27 Elektrische Schaltung mit einer Vorrichtung zur Erfassung einer Stromgröße

Publications (1)

Publication Number Publication Date
WO2000013031A1 true WO2000013031A1 (fr) 2000-03-09

Family

ID=7878898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/001248 WO2000013031A1 (fr) 1998-08-27 1999-04-28 Circuit electrique comprenant un dispositif de detection de l'intensite de courant

Country Status (2)

Country Link
DE (1) DE19838974A1 (fr)
WO (1) WO2000013031A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106981680A (zh) * 2015-12-23 2017-07-25 罗伯特·博世有限公司 用于测量电位差的导电测量层

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10000500B4 (de) * 2000-01-08 2004-09-02 Robert Bosch Gmbh Vorrichtung zur Messung eines in einem Elektronikmodul fließenden Stroms
DE10013345B4 (de) * 2000-03-17 2004-08-26 Sauer-Danfoss Holding Aps Einrichtung zum Messen eines durch eine Leiterbahn fließenden elektrischen Stroms und deren Anwendung
DE10041879B4 (de) * 2000-08-25 2006-08-10 Hella Kgaa Hueck & Co. Verfahren und Vorrichtung zur Strommessung
US6861834B2 (en) 2000-10-26 2005-03-01 Broadcom Corporation System and method for measuring the power consumed by a circuit on a printed circuit board
US6714026B2 (en) 2001-06-28 2004-03-30 Broadcom Corporation System and method for measuring the thickness or temperature of a circuit in a printed circuit board
US7002360B2 (en) 2001-06-28 2006-02-21 Broadcom Corporation System and method for measuring the thickness or temperature of a circuit in a printed circuit board
DE10203813A1 (de) 2002-01-31 2003-08-21 Diehl Ako Stiftung Gmbh & Co Schaltungsanordnung zur Messung und Begrenzung von Strömen
DE102004039601B3 (de) * 2004-08-13 2006-07-13 Intedis Gmbh & Co. Kg Schaltungsanordnung zum Schutz eines Leiterelements gegen Überstrom
DE102004042719A1 (de) * 2004-09-03 2005-09-29 Audi Ag Stromsensor mit einem Messwiderstand
DE102006039097A1 (de) * 2006-02-20 2007-08-23 Conti Temic Microelectronic Gmbh Strommess-Einrichtung
DE102006058879A1 (de) * 2006-12-13 2008-06-26 Siemens Ag Messvorrichtung zur Messung eines elektrischen Stromes
DE102007036837A1 (de) * 2007-08-02 2009-02-05 Siemens Ag Strommessverfahren in Niederspannungsleistungsschaltern mittels eines speziellen Messmoduls
DE102011003699A1 (de) * 2011-02-07 2012-08-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Stromstärkemessung einer Kraftfahrzeugbatterie
DE102014220480A1 (de) * 2014-10-09 2016-04-14 Conti Temic Microelectronic Gmbh Vorrichtung und Verfahren zur Strommessung in einer Leiterbahn einer Leiterplatte

Citations (5)

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Publication number Priority date Publication date Assignee Title
DE3405442C1 (de) * 1983-09-05 1985-01-31 Aktiengesellschaft für industrielle Elektronik AGIE Losone bei Locarno, Losone, Locarno Meßwiderstand
JPS63277978A (ja) * 1987-03-19 1988-11-15 Ryowa Denshi Kk 高周波電流測定方法
US5300917A (en) * 1993-01-15 1994-04-05 Maue H Winston Junction box having integrally formed shunt
US5461307A (en) * 1994-03-03 1995-10-24 General Electric Company Electro-optical current sensing system and method for sensing and avoiding thermally induced measurement error therein
WO1996018109A2 (fr) * 1994-12-09 1996-06-13 National Semiconductor Corporation Resistance integree permettant de detecter des parametres electriques

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DE2939594A1 (de) * 1979-09-29 1981-04-09 Robert Bosch Gmbh, 7000 Stuttgart Elektrischer messwiderstand fuer hohe stroeme
DD245494A1 (de) * 1986-01-31 1987-05-06 Buchwitz Otto Starkstrom Schaltungsanordnung zur messung des gesamtspannungsabfalles an stromschienenverbindungen mit mehrfachverschienung
GB2224853A (en) * 1988-11-12 1990-05-16 David Mawdsley Measuring current
DE4130978C2 (de) * 1991-09-18 1994-03-31 Daimler Benz Ag Verfahren zum Prüfen von elektrischen, abgesicherten Verbrauchern in einem Fahrzeug-Bordnetz
US5386188A (en) * 1993-01-15 1995-01-31 Keithley Instruments, Inc. In-circuit current measurement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405442C1 (de) * 1983-09-05 1985-01-31 Aktiengesellschaft für industrielle Elektronik AGIE Losone bei Locarno, Losone, Locarno Meßwiderstand
JPS63277978A (ja) * 1987-03-19 1988-11-15 Ryowa Denshi Kk 高周波電流測定方法
US5300917A (en) * 1993-01-15 1994-04-05 Maue H Winston Junction box having integrally formed shunt
US5461307A (en) * 1994-03-03 1995-10-24 General Electric Company Electro-optical current sensing system and method for sensing and avoiding thermally induced measurement error therein
WO1996018109A2 (fr) * 1994-12-09 1996-06-13 National Semiconductor Corporation Resistance integree permettant de detecter des parametres electriques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 96 (P - 839) 7 March 1989 (1989-03-07) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106981680A (zh) * 2015-12-23 2017-07-25 罗伯特·博世有限公司 用于测量电位差的导电测量层

Also Published As

Publication number Publication date
DE19838974A1 (de) 2000-03-02

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