NO963624L - Circuits for current measurement and their use - Google Patents
Circuits for current measurement and their useInfo
- 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
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.
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 |
AU41121/97A AU4112197A (en) | 1996-08-30 | 1997-08-29 | A circuit for current measurement and uses thereof |
PCT/DK1997/000355 WO1998009176A1 (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)
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)
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. |
-
1996
- 1996-08-30 NO NO963624A patent/NO963624L/en unknown
-
1997
- 1997-08-29 WO PCT/DK1997/000355 patent/WO1998009176A1/en active Application Filing
- 1997-08-29 AU AU41121/97A patent/AU4112197A/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
NO963624D0 (en) | 1996-08-30 |
AU4112197A (en) | 1998-03-19 |
WO1998009176A1 (en) | 1998-03-05 |
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