NO963624L - Circuits for current measurement and their use - Google Patents

Circuits for current measurement and their use

Info

Publication number
NO963624L
NO963624L NO963624A NO963624A NO963624L NO 963624 L NO963624 L NO 963624L NO 963624 A NO963624 A NO 963624A NO 963624 A NO963624 A NO 963624A NO 963624 L NO963624 L NO 963624L
Authority
NO
Norway
Prior art keywords
conductor
current
supplied
voltage
well
Prior art date
Application number
NO963624A
Other languages
Norwegian (no)
Other versions
NO963624D0 (en
Inventor
Erling Nielsen
Original Assignee
Lk As
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 Lk As filed Critical Lk As
Priority to NO963624A priority Critical patent/NO963624L/en
Publication of NO963624D0 publication Critical patent/NO963624D0/en
Priority to PCT/DK1997/000355 priority patent/WO1998009176A1/en
Priority to AU41121/97A priority patent/AU4112197A/en
Publication of NO963624L publication Critical patent/NO963624L/en

Links

Classifications

    • 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
    • G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only

Landscapes

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

Abstract

Ved måling av strøm i en leder (6) tilkobles en differentialforsterkers (1) to innganger lederen i to punkter (7, 8), som har en passende avstand. På denne måte unngås tapsgivende elementer ved målingen, samt bruk av strømomsluttende elementer. Strømforsyningen til differentialforsterkeren uttas symmetrisk i forhold til lederens potentiale. I tillegg til strømmen måles lederens spenning, og så vel som strøm som spenning tilføres A/D omformer. De digitaliserte signaler tilføres en beregningsenhet (5), hvilken er innrettet til å beregne lederens øyeblikkseffekt, øyeblikkesenergi, kvadratet på lederens strøm, strømmens kurveform, samt frekvensinnhold. Ovennevnte måleoppstilling er velegnet til styring av releer, sikringsutkoblinger, overstrømsbestemmelser samt som forbruksmåler til motorstyringer, og forsterkerkarakteristikk-overvåkning.When measuring current in a conductor (6), a differential amplifier (1) connects two inputs of the conductor at two points (7, 8), which have a suitable distance. In this way loss-causing elements are avoided during the measurement, as well as the use of current-enclosing elements. The power supply to the differential amplifier is drawn symmetrically in relation to the conductor's potential. In addition to the current, the conductor voltage is measured, and both the current and the voltage are supplied to the A / D converter. The digitized signals are supplied to a calculation unit (5), which is adapted to calculate the conductor's instant power, instantaneous energy, the square of the conductor current, the waveform of the current, and frequency content. The above measurement set is suitable for control of relays, fuse switch-offs, overcurrent regulations as well as as consumption meter for motor controls, and amplifier characteristic monitoring.

NO963624A 1996-08-30 1996-08-30 Circuits for current measurement and their use NO963624L (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NO963624A NO963624L (en) 1996-08-30 1996-08-30 Circuits for current measurement and their use
PCT/DK1997/000355 WO1998009176A1 (en) 1996-08-30 1997-08-29 A circuit for current measurement and uses thereof
AU41121/97A AU4112197A (en) 1996-08-30 1997-08-29 A circuit for current measurement and uses thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO963624A NO963624L (en) 1996-08-30 1996-08-30 Circuits for current measurement and their use

Publications (2)

Publication Number Publication Date
NO963624D0 NO963624D0 (en) 1996-08-30
NO963624L true NO963624L (en) 1998-03-02

Family

ID=19899772

Family Applications (1)

Application Number Title Priority Date Filing Date
NO963624A NO963624L (en) 1996-08-30 1996-08-30 Circuits for current measurement and their use

Country Status (3)

Country Link
AU (1) AU4112197A (en)
NO (1) NO963624L (en)
WO (1) WO1998009176A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7629787B2 (en) 2007-01-03 2009-12-08 Qixiang Lu Current sensor having shunt resistor and clamper diode for motor control
DE102011083307A1 (en) * 2011-09-23 2013-03-28 Continental Automotive Gmbh Device for measuring a battery current

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186339A (en) * 1978-01-20 1980-01-29 Curtis Instruments, Inc. Method and apparatus for measuring current, especially useful in multi-ampere systems
US4584525A (en) * 1983-04-18 1986-04-22 General Electric Company Current-shunt system for known conductors
FR2697091B1 (en) * 1992-10-21 1994-12-30 Sagem Current measurement device by shunt.

Also Published As

Publication number Publication date
AU4112197A (en) 1998-03-19
NO963624D0 (en) 1996-08-30
WO1998009176A1 (en) 1998-03-05

Similar Documents

Publication Publication Date Title
TW357268B (en) Vector electricity meters and associated vector electricity metering methods
CA2353946A1 (en) Electrochemical noise technique for corrosion
GB2312049B (en) Battery gauge
CA2165714A1 (en) Impedance feedback monitor with query electrode for electrosurgical instrument
HK1048395A1 (en) Measuring residual current and power consumption
WO1995024014A3 (en) One-terminal data fault location system
CA2071033A1 (en) Method and apparatus for controlling the output voltage of an ac electrical system
WO2000003262A3 (en) Improvements relating to electrical power measurement
NO963624L (en) Circuits for current measurement and their use
CA2203748A1 (en) Device used for long term monitoring of magnetic fields
EA199900176A1 (en) MULTIPLICATION DIAGRAM FOR POWER MEASUREMENT DEVICE AND METHOD FOR MEASURING INSTANT POWER VALUE
ATE305614T1 (en) DEVICE FOR MEASURING MAINS VOLTAGE FOR RAIL VEHICLES
ATE236408T1 (en) MEASURING METHOD FOR CAPACITIVE MEASURING SYSTEM
WO1999032891A3 (en) Method for defining instantaneous value of current of pulse-controlled inductive load
CA2203747A1 (en) Method for long term monitoring of magnetic fields
ES2178954A1 (en) System for dynamic evaluation of the state of health and charge of a vehicle battery
ES2001241A6 (en) Constant-current control circuit for a stepped motor of single-pole type, particularly for use in motor vehicles
NZ502167A (en) System for measuring the alternating current equivalent series resistance of a conductor
JPS6488264A (en) In-circuit tester
JPH0235952B2 (en) KOSHOTENHYOTEIHOSHIKI
RU94008705A (en) Gear for uninterrupted control of electric conductance of a c power supply system
US3774111A (en) Peak horsepower meter
JP2575012Y2 (en) Memory coder with waveform analysis function
JPS5393072A (en) Earthing resistance measuring apparatus
UA19530A (en) Appliance for measurement of non-linear conductivity