Načelo rada svitka i integratora Rogowski
Jul 20, 2020
Ostavite poruku
OperatingprincipleofRogowskicoilandintegrator
WorkingprincipleofRogowskicoil
Rogowskicoilisanannularcoilwhichisuniformlywoundonanonferromagneticmaterial.Theoutputsignalisthedifferentialofcurrenttotime.Throughacircuitthatintegratestheoutputvoltagesignal, theinputcurrentcanbetrulyrestored.Thecoilhasthecharacteristicsofreal-timecurrentmeasurement, fastresponsespeedandnosaturation.ItissuitableforAC, especiallyhigh-frequencyandlargecurrentmeasurement.
Rogowskicoil, alsoknownascurrentmeasurementcoilanddifferentialcurrentsensor, ismainlyusedtomeasureACcurrent.TheworkingprincipleofRogowskicoilisthatthecoilskeletonsurroundstheconductorundertest.Themagneticfieldaroundtheconductorwillchangewiththechangeofcurrentintheconductor, andtheenameledwireontheskeletonwillinduceelectromotiveforce.Accordingtothemathematicalderivation, theEMFisdirectlyproportionaltothederivativeofthecurrentintheconductor, andtheproportionalcoefficientisrelatedtothenumberofturnsofthecoil, thecrosssectionoftheskeletonandthemagneticconductivity.ThecurrentintheconductorcanbereducedbyintegratingtheEMF.
Workingprincipleofintegrator
InordertoaccuratelyrestoretheoutputofinductionelectromotiveforceofRogowskicoiltothemeasuredACcurrentI, aninverseintegrationcircuitmustbeadded.BecausethevoltageinducedbyRogowskicoilisverysmall, inordertoamplifytheinducedvoltage, anamplifiercircuitmustbeaddedinfrontoftheintegrator.Integrationisaveryimportantlink.Thesignaltoberestoredisverysmall.Inordertofacilitatethemeasurement, thesignalshouldbeamplifiedandthenintegrated.Ontheonehand, therestoredsignalcanbeincreased.Ontheotherhand, theexistenceofcapacitancecanfilteroutunnecessaryinterference.TheintegratorcanrestorethemeasuredACcurrentbyamplifyingandintegratingtheinducedvoltageoftheRogowskicoil.
WorkingprincipleofRogowskicoil
Rogowskicoilisanannularcoilwhichisuniformlywoundonanonferromagneticmaterial.Theoutputsignalisthedifferentialofcurrenttotime.Throughacircuitthatintegratestheoutputvoltagesignal, theinputcurrentcanbetrulyrestored.Thecoilhasthecharacteristicsofreal-timecurrentmeasurement, fastresponsespeedandnosaturation.ItissuitableforAC, especiallyhigh-frequencyandlargecurrentmeasurement.
Rogowskicoil, alsoknownascurrentmeasurementcoilanddifferentialcurrentsensor, ismainlyusedtomeasureACcurrent.TheworkingprincipleofRogowskicoilisthatthecoilskeletonsurroundstheconductorundertest.Themagneticfieldaroundtheconductorwillchangewiththechangeofcurrentintheconductor, andtheenameledwireontheskeletonwillinduceelectromotiveforce.Accordingtothemathematicalderivation, theEMFisdirectlyproportionaltothederivativeofthecurrentintheconductor, andtheproportionalcoefficientisrelatedtothenumberofturnsofthecoil, thecrosssectionoftheskeletonandthemagneticconductivity.ThecurrentintheconductorcanbereducedbyintegratingtheEMF.
Workingprincipleofintegrator
InordertoaccuratelyrestoretheoutputofinductionelectromotiveforceofRogowskicoiltothemeasuredACcurrentI, aninverseintegrationcircuitmustbeadded.BecausethevoltageinducedbyRogowskicoilisverysmall, inordertoamplifytheinducedvoltage, anamplifiercircuitmustbeaddedinfrontoftheintegrator.Integrationisaveryimportantlink.Thesignaltoberestoredisverysmall.Inordertofacilitatethemeasurement, thesignalshouldbeamplifiedandthenintegrated.Ontheonehand, therestoredsignalcanbeincreased.Ontheotherhand, theexistenceofcapacitancecanfilteroutunnecessaryinterference.TheintegratorcanrestorethemeasuredACcurrentbyamplifyingandintegratingtheinducedvoltageoftheRogowskicoil.
Za više informacija kontaktirajte nas nasales@xfullstar.com