Αρχή λειτουργίας του πηνίου και ολοκληρωτή Rogowski
Jul 20, 2020
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OperatingprinsipleofRogowskicoilandintegrator
WorkingprincipleofRogowskicoil
Rogowskicoilisanannularcoilwhisununlylywoundonanonferromagneticmaterial. Outputsignalisthedifferentialofcurrenttotime.Throughacircuitthatintegratestheoutputvoltagesignal, theinputcurrentcanbetrulyrestored.Thecoilhaschecurureraction -trauricraction -trauramureicraction
Rogowskicoil, alsoknownascurrentmeasurementcoilanddifferentialcurrentsensor, ismainlyusedtomeasureACcurrent.TheworkingprincipleofRogowskicoilisthatthecoilskeletonsurroundstheconductorundertest.Themagneticfieldaroundtheconductorwillchangewiththechangeofcurrentintheconductor, andtheenameledwireontheskeletonwillinduceelectromotiveforce.Accordingtothemathematicalderivation, theEMFisdirectlyproportionaltothederivativeofthecurrentintheconductor, andtheproportionalcoefficientisrelatedtothenumberofturnsofthecoil, thecrosssectionoftheskeletonandthemagneticconductivity.ThecurrentintheconductorcanbereducedbyintegratingtheEMF.
Εργαστήριο αρχής ολοκλήρωσης
InordertoaccuratelyrestoretheoutputofinductionelectromotiveforceofRogowskicoiltothemeasuredACcurrentI, aninverseintegrationcircuitmustbeadded.BecausethevoltageinducedbyRogowskicoilisverysmall, inordertoamplifytheinducedvoltage, anamplifiercircuitmustbeaddedinfrontoftheintegrator.Integrationisaveryimportantlink.Thesignaltoberestoredisverysmall.Inordertofacilitatethemeasurement, thesignalshouldbeamplifiedandthenintegrated.Ontheonehand, therestoredsignalcanbeincreased.Ontheotherhand, theexistenceofcapacitancecanfilteroutunnecessaryinterference.TheintegratorcanrestorethemeasuredACcurrentbyamplifyingandintegratingtheinducedvoltageoftheRogowskicoil.
WorkingprincipleofRogowskicoil
Rogowskicoilisanannularcoilwhisununlylywoundonanonferromagneticmaterial. Outputsignalisthedifferentialofcurrenttotime.Throughacircuitthatintegratestheoutputvoltagesignal, theinputcurrentcanbetrulyrestored.Thecoilhaschecurureraction -trauricraction -trauramureicraction
Rogowskicoil, alsoknownascurrentmeasurementcoilanddifferentialcurrentsensor, ismainlyusedtomeasureACcurrent.TheworkingprincipleofRogowskicoilisthatthecoilskeletonsurroundstheconductorundertest.Themagneticfieldaroundtheconductorwillchangewiththechangeofcurrentintheconductor, andtheenameledwireontheskeletonwillinduceelectromotiveforce.Accordingtothemathematicalderivation, theEMFisdirectlyproportionaltothederivativeofthecurrentintheconductor, andtheproportionalcoefficientisrelatedtothenumberofturnsofthecoil, thecrosssectionoftheskeletonandthemagneticconductivity.ThecurrentintheconductorcanbereducedbyintegratingtheEMF.
Εργαστήριο αρχής ολοκλήρωσης
InordertoaccuratelyrestoretheoutputofinductionelectromotiveforceofRogowskicoiltothemeasuredACcurrentI, aninverseintegrationcircuitmustbeadded.BecausethevoltageinducedbyRogowskicoilisverysmall, inordertoamplifytheinducedvoltage, anamplifiercircuitmustbeaddedinfrontoftheintegrator.Integrationisaveryimportantlink.Thesignaltoberestoredisverysmall.Inordertofacilitatethemeasurement, thesignalshouldbeamplifiedandthenintegrated.Ontheonehand, therestoredsignalcanbeincreased.Ontheotherhand, theexistenceofcapacitancecanfilteroutunnecessaryinterference.TheintegratorcanrestorethemeasuredACcurrentbyamplifyingandintegratingtheinducedvoltageoftheRogowskicoil.
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