Igama elithi "harmonics" yigama elibanzi futhi lisetshenziswa ezimbonini eziningi ezahlukene.Ngeshwa, izinkinga ezithile zikagesi zisolwa ngokungalungile kuma-harmonics.Lawa ma-harmonics akufanele adideke nokuphazanyiswa kwefrikhwensi yomsakazo (RFI), okwenzeka kumafrikhwensi aphezulu kakhulu kunama-harmonics.Ama-harmonic welayini yamandla amaza aphansi, ngakho awaphazamisi amasiginali we-LAN engenantambo, omakhalekhukhwini, imisakazo ye-FM noma ye-AM, nanoma iyiphi into esetshenziswayo ezwela kakhulu umsindo wamaza aphezulu.
I-Harmonics ibangelwa imithwalo engeyona imigqa.Imithwalo engaqondile ayidonsi i-sinusoid yamanje kusuka kuhlelo lokusebenza.Izibonelo zemithwalo engalayini zifaka ama-VFD, amamotho e-EC, izibani ze-LED, amakhophi, amakhompyutha, izinsiza zikagesi ezingaphazamiseki, amathelevishini, kanye neningi lezinto zikagesi ezihlanganisa ugesi.Izimbangela ezibaluleke kakhulu ze-harmonics esakhiweni ngokuvamile azikho umugqa, amandla ezigaba ezintathu, futhi uma amandla engeziwe ekhona, ama-harmonic currents kunethiwekhi azoba mkhulu.Isigaba esilandelayo sibuyekeza ugesi
izici ze-VFD.Lokhu okokukhombisa isibonelo somthwalo ongewona umugqa.Idizayini edume kakhulu ye-VFD isebenza ngokuthatha ulayini wokufaka wezigaba ezintathu we-AC bese ulungisa i-voltage ngama-diode.Lokhu kuguqula i-voltage ibe i-voltage ye-DC ebushelelezi ebhange lama-capacitor.I-VFD bese iguqula i-DC ibuyele ku-AC waveform ukuze ilawule isivinini, i-torque kanye nendlela yemoto.I-non-linear current idalwe ukulungiswa kwezigaba ezintathu kwe-AC-to-DC.Izinkinga ezibangelwa ukuphazamiseka kwe-harmonic Amazinga aphezulu okuhlanekezela kwe-harmonic endaweni angadala izinkinga eziningi.Ezinye zezinkinga okungase kuhlangatshezwane nazo yilezi:
• Ukwehluleka ngaphambi kwesikhathi kanye nokuncipha kwesikhathi sokuphila kwamadivayisi ngokuvamile kwenzeka lapho ukushisa kuba khona, okufana nalokhu: – Ukushisa ngokweqile kwama-transformer, izintambo, ama-circuit breaker nama-fuse
- Ukushisa ngokweqile kwama-motor anikwe amandla ngqo kuwo wonke umugqa
• Uhambo oluphazamisayo lwezinqamuli namafuse ngenxa yokushisa okwengeziwe nokulayisha okuvumelanayo
• Ukusebenza okungazinzile kwamajeneretha asekelayo
• Ukusebenza okungazinzile kwezinto zikagesi ezizwelayo ezidinga i-waveform ye-AC ye-sinusoidal
• Amalambu alokozayo
Kunezindlela eziningi zokunciphisa ama-harmonics futhi asikho "usayizi owodwa olingana nawo wonke" isisombululo.I-Noker Electric ingumnikezeli ochwepheshe weisihlungi se-harmonic esisebenzayofuthii-static var generator.Uma kukhona umbuzo mayelana ne-harmonic, sicela uthinte i-Noker Electric, sizokunikeza isixazululo.
Isikhathi sokuthumela: Aug-28-2023