Lo lus "harmonics" yog ib lo lus dav thiab siv nyob rau hauv ntau yam kev lag luam.Hmoov tsis zoo, qee qhov teeb meem hluav taws xob tsis raug liam rau kev sib raug zoo.Cov harmonics no yuav tsum tsis txhob totaub nrog xov tooj cua zaus cuam tshuam (RFI), uas tshwm sim ntawm ntau zaus ntau dua li harmonics.Cov kab hluav taws xob sib xyaw ua ke yog qhov tsawg, yog li lawv tsis cuam tshuam nrog wireless LAN teeb liab, xov tooj ntawm tes, FM lossis AM xov tooj cua, lossis ib qho khoom siv tshwj xeeb rau lub suab nrov nrov.
Harmonics yog tshwm sim los ntawm non-linear loads.Nonlinear loads tsis kos tam sim no sinusoidally los ntawm kev siv hluav taws xob.Piv txwv ntawm cov khoom uas tsis yog-linear muaj xws li VFDs, EC motors, LED teeb pom kev zoo, tshuab luam ntawv, khoos phis tawj, khoom siv hluav taws xob tsis cuam tshuam, TV, thiab feem ntau ntawm cov khoom siv hluav taws xob uas suav nrog cov khoom siv hluav taws xob.Qhov tseem ceeb tshaj plaws ntawm kev sib haum xeeb hauv lub tsev yog feem ntau tsis yog-linear, peb-theem fais fab, thiab lub zog ntau dua, qhov loj dua qhov kev sib haum xeeb hauv lub network yuav yog.Tshooj tom ntej yuav tshuaj xyuas cov hluav taws xob
Cov yam ntxwv ntawm VFD.Qhov no yog los qhia ib qho piv txwv ntawm ib qho tsis-linear load.Qhov nrov tshaj plaws VFD tsim ua haujlwm los ntawm kev siv peb-theem AC kab input voltage thiab kho qhov voltage los ntawm diodes.Qhov no hloov qhov hluav taws xob mus rau hauv qhov hluav taws xob zoo DC hla ib lub txhab nyiaj ntawm cov capacitors.Lub VFD ces hloov DC rov qab rau hauv AC waveform rau lub cev muaj zog thiaj li tswj tau qhov ceev, torque thiab kev taw qhia ntawm lub cev muaj zog.Cov tsis-linear tam sim no yog tsim los ntawm peb-theem AC-rau-DC rectification.Cov teeb meem tshwm sim los ntawm harmonic distortion High theem ntawm harmonic distortion nyob rau hauv ib qho chaw yuav tsim ntau yam teeb meem.Qee qhov teeb meem uas yuav ntsib yog:
• Kev ua tsis tiav ntxov thiab txo lub neej ntawm cov khoom siv feem ntau tshwm sim thaum muaj cua sov dhau, xws li: - Kev kub siab ntawm transformers, cables, Circuit Court breakers thiab fuses
- Overheating ntawm lub cev muaj zog uas tau siv ncaj qha hla txoj kab
• Ntshai mus ncig ua si ntawm breakers thiab fuses vim qhov ntxiv cua sov thiab kev sib haum xeeb loading
• Kev ua haujlwm tsis ruaj khov ntawm cov tshuab hluav taws xob thaub qab
• Kev ua haujlwm tsis ruaj khov ntawm cov khoom siv hluav taws xob rhiab heev uas yuav tsum muaj qhov ntshiab sinusoidal AC waveform
• Flickering teeb
Muaj ntau txoj hauv kev los txo cov kev sib haum xeeb thiab tsis muaj "ib qho loj haum rau tag nrho" kev daws teeb meem.Noker Electric yog tus kws tshaj lij kev lag luamactive harmonic limthiabstatic var generator.Yog muaj lus nug txog kev sib haum xeeb, thov hu rau Noker Electric, peb yuav muab kev daws teeb meem rau koj.
Post lub sij hawm: Aug-28-2023