Kev txheeb xyuas cov txheej txheem rau cov zis Waveforms ntawm Hloov Cov Khoom Siv Hluav Taws Xob
Raws li ib qho tseem ceeb ntawm cov khoom siv hluav taws xob, qhov zoo ntawm cov zis waveform ntawm lub zog hloov hluav taws xob cuam tshuam ncaj qha rau kev ua haujlwm thiab kev ruaj ntseg ntawm tag nrho cov kab ke. Yog li ntawd, nyob rau hauv - tsom xam qhov tob ntawm cov zis waveform ntawm kev hloov cov khoom siv fais fab yog qhov tseem ceeb tshwj xeeb. Tsab ntawv xov xwm no yuav muab cov ncauj lus kom ntxaws ntxaws ntawm cov zis waveform ntawm kev hloov hluav taws xob los ntawm ntau qhov kev xav, thiab tshawb xyuas nws cov kev cuam tshuam thiab kev txhim kho.
1, Cov yam ntxwv tseem ceeb ntawm cov zis waveform ntawm switching fais fab mov
Cov zis waveform ntawm lub zog hloov hluav taws xob feem ntau tshwm sim raws li cov xwm txheej tsis muaj zog lossis mem tes tsis. Cov yam ntxwv waveform no tso cai rau hloov cov khoom siv hluav taws xob los muab cov khoom tso tawm DC ruaj khov thaum tseem nrog qee cov ripples thiab suab nrov. Ripple yog hais txog lub superimposed AC tivthaiv nyob rau hauv cov zis waveform, thaum lub suab nrov yog lub siab - zaus cuam tshuam teeb liab tsim los ntawm cov khoom xws li hloov cov hlab.
2, Kev Tshawb Fawb Txog Kev Tshaj Tawm Waveform ntawm Kev Hloov Hluav Taws Xob
Waveform kev soj ntsuam
Ua ntej, peb tuaj yeem siv cov khoom siv xws li oscilloscopes ncaj qha saib cov zis tawm ntawm lub zog hloov pauv. Los ntawm kev soj ntsuam cov duab, amplitude, zaus, thiab lwm yam tsis zoo ntawm lub waveform, kev ua haujlwm thiab kev ua haujlwm ntawm lub hwj huam tuaj yeem txiav txim siab ua ntej.
(1) Waveform zoo: Qhov zoo tshaj plaws tso zis waveform ntawm lub zog hloov hluav taws xob yuav tsum yog DC waveform du, tab sis hauv kev xyaum, vim muaj ntau yam
yam, lub waveform tej zaum yuav muaj tej yam distortions thiab distortions. Piv txwv li, thaum lub zog hloov hluav taws xob ua haujlwm hauv DCM (kev ua haujlwm tsis tu ncua), cov ntawv tso zis tawm yuav tshwm sim raws li lub voj voos voos; Nyob rau hauv CCM (nruam conduction hom), cov zis waveform yog ze rau ib tug trapezoidal yoj.
(2) Waveform amplitude: Lub waveform amplitude qhia txog qhov loj ntawm qhov tso zis voltage. Thaum soj ntsuam waveforms, peb yuav tsum tau them sai sai rau qhov stability thiab ripple loj ntawm cov zis voltage. Feem ntau hais lus, qhov me me ntawm ripple, qhov ruaj khov ntawm cov zis voltage, thiab qhov zoo dua qhov kev ua haujlwm ntawm lub zog.
(3) Waveform zaus: Lub waveform zaus qhia txog kev khiav hauj lwm zaus ntawm lub raj hloov. Feem ntau hais lus, qhov siab dua qhov hloov zaus, qhov ntim me me thiab qhov hnyav ntawm lub zog hluav taws xob, tab sis qhov kev hloov pauv yuav nce ntxiv. Yog li ntawd, thaum xaiv qhov hloov zaus, nws yuav tsum ntsuas qhov xav tau tiag tiag.
spectrum tsom xam
Ntxiv nrog rau kev soj ntsuam ncaj qha rau lub waveform, peb kuj tuaj yeem siv cov khoom siv xws li lub spectrum analyzer los ua spectrum tsom xam ntawm cov zis waveform ntawm lub zog hloov hluav taws xob. Los ntawm kev tsom xam spectrum, peb tuaj yeem nkag siab tob txog ntau yam khoom siv zaus thiab lawv qhov kev faib tawm hauv cov zis waveform.
(1) Cov khoom siv tseem ceeb: Cov khoom siv tseem ceeb yog DC tivthaiv hauv qhov tso zis waveform, xav txog qhov nruab nrab tus nqi ntawm cov zis hluav taws xob. Hauv qhov xwm txheej zoo tagnrho, qhov amplitude ntawm lub hauv paus tivthaiv yuav tsum sib npaug rau cov nqi ntawm cov zis voltage.
(2) Harmonic tivthaiv: Harmonic tivthaiv yog AC tivthaiv nyob rau hauv cov zis waveform, feem ntau tshwm sim los ntawm nonlinear teebmeem generated los ntawm cov khoom xws li hloov cov hlab. Harmonic Cheebtsam tuaj yeem ua rau muaj kev hloov pauv ntawm cov zis hluav taws xob thiab muaj suab nrov. Yog li ntawd, thaum ntsuas kev ua tau zoo ntawm cov khoom siv hluav taws xob, kev saib xyuas yuav tsum tau them rau qhov loj thiab kev faib tawm ntawm cov khoom sib haum xeeb.
