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Industries like Gas, HVAC (Heating, ventilation, and air conditioning) and oil, wastewater management and metals and mining industries use Harmonic filters for VFD. These filters deal with distortions and make the work easy by mitigating the harmonics to an endurable level. Go through this article for complete information about use of Harmonic filters for VFD.
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HARMONIC FILTERSFORVFD DevicethatMitigatestheHarmonicDistortion
Weknowthatexcessofsomethingisnotgood, well todaywearetalkingintermsofelectronics. You mustbeusingVFDs (inverters) inyourhomesand officestocontrolAcmotors' speed. Well, thisistoo technical; letusmakeiteasy. Supposea10Vinput signalisappliedtoanelectriccircuit, andthe outputsignalcanholdonly5Vvoltage. This variationinthevoltagewillresultinthesignal's voltagelossandultimatelyshowharmonic distortion. HARMONIC DISTORTION Harmonicdistortion, inelectricalterms, isthetwist orthedegradationofthemovement. Ifweneedto overcomethisdistortion, theeasiestwayistouse filterscalledHarmonicfilters.
HARMONICFILTERSFOR VARIABLE-FREQUENCY NowinthecaseofVFDs, weneedtomakesurethedrivesare workingcorrectly. Sotomakeiteasy, weusethesamemethod, i.e. Harmonicfiltersforvariable-frequencydrives. Ifweexplain thiswholeprocessinreallife, it'slikethis; supposeyouhaveto fill10mlinawaterbottle, buthowwillyoumeasureit? Soyou thinkofusingawaterbottlewithmeasuringlevelsonit. Nowthelevelsonthebottlewillhelpyoutofilltherequired amount. Liketheharmonicfilters, thesefilterswillallowthe motortoworkwiththeappropriateamountofcurrentflowand workefficiently.
Ifwewantourelectricalsystemtofunctioncorrectly, thentheeliminationofharmonicdistortionis required, andharmonicfiltersfitwellforthis elimination. See, thepowersystemscanaccommodateacertain levelofharmoniccurrents. Whenthisharmonic becomesthesignificantcomponentfortheoverall load, thatcanbeproblematiclike: WHYDOWENEED HARMONIC FILTERS? Overheatingoftheelectricalsystems Hardwaredamage Fireinthewiringandthegenerators Communicationerrorsinthesystem Significantdamagesandshortenedlifespanof systems
IndustrieslikeGas, HVAC (Heating, ventilation, andair conditioning) andoil, wastewatermanagementandmetals andminingindustriesuseHarmonicfiltersforVFD. These filtersdealwithdistortionsandmaketheworkeasyby mitigatingtheharmonicstoanendurablelevel. Harmonic filtersarebuiltwithanarrayofinductors, resistors, and capacitorscapableofdivertingtheundesiredharmonic currents. Thesefiltershavethecapacityeventoshiftthe harmonicsofspecificfrequenciesofthesystem. HarmonicfiltersforVFD
CONCLUSION Weneedourelectricalsystemstoworkcorrectlywithoutanyerrorandlag. Dealing withelectricalsisnotaneasytask.Therearerisksandtoensuresafety, if technologicaladvancementsareprovidingustherequiredtools, whydon'tweuse those? Harmonicfiltersforvariablefrequencydrivesareoneofthose. Youmust visitECS, wheretheyareprovidingMirusharmonicmitigation. Mirusharmonic mitigationmeetsIEEE519standardforbothvoltageandcurrentdistortion. Wecan applytheseeasilytotheinputofasingleVSDswithoutsacrificinganyenergy efficiency. Saveenergybyreducingupstreamharmoniclossesandfindmoreabout Mirusharmonicmitigation.
SOURCE: https://www.ecsintl.com/mirus-harmonic-mitigation/