Lub suab nrov nrov cuam tshuam kev cuam tshuam kev ntsuas rau PWM hloov hluav taws xob tswj hluav taws xob
1. Nthuav lub sijhawm ua haujlwm tam sim ntawm lub hwj chim hloov raj
2. Txo transformer to inductance
3. Tsim nyog xaiv qhov hloov ceev ntawm lub transistor switching thiab lub freewheeling diode
4. Siv P-hom LC sib npaug lim
5. Siv cov khoom siv hluav taws xob ntau zaus
6. Txo cov zis xaim ntev
Kev cuam tshuam ntawm Lub Hwj Chim Hloov Hloov Hloov Rau Lub Sijhawm ntawm Spike Disturbance
Lub sijhawm tig thiab tig tawm ntawm lub transistor yog inversely proportional rau nws cutoff zaus. Qhov luv luv lub sij hawm tig-on thiab tig-off, qhov ceev ntawm switching ceev. Lub sijhawm ntawm kev sib txuas ua ke nyob ntawm qhov hloov ceev ntawm cov cuab yeej siv rau KQ thiab KD. Sib piv cov khoom siv hloov pauv nrog qhov sib txawv ntawm qhov sib txawv, qhov ceev ntawm cov khoom siv hloov pauv sai dua thiab lub sijhawm luv dua ntawm kev coj ua tib lub sijhawm, qhov dav dav thiab qhov loj dua qhov amplitude ntawm qhov kev cuam tshuam ntawm kev cuam tshuam.
Txo qhov hluav taws xob qhov hluav taws xob tshwm sim los ntawm Transformer Leakage Inductance Qhov ntau dua qhov xau inductance ntawm transformer, qhov siab dua qhov hluav taws xob thiab RFI ntau dua. Tshwj xeeb tshaj yog tom qab lub transformer yog shielded, lub leakage inductance yog correspondingly loj vim tsis zoo coupling. Feem ntau hais lus, cov xau inductance ntawm lub qhov txhab hloov pauv nrog toroidal core yog me dua li ntawm hom E. Tsis tas li ntawd, cov txheej txheem winding kuj tseem ceeb heev. Ib txoj kev zoo winding yog thawj cua ib nrab ntawm tag nrho cov lem ntawm lub hauv paus, ces cua tag nrho cov lem ntawm theem nrab, thiab thaum kawg cua qhov seem ib nrab ntawm cov thawj, uas yog, lub thib ob kauj yog nyob rau hauv thawj kauj. nruab nrab. Nyob rau hauv txoj kev no, lub hauv paus kauj tseem zoo ua ke, kom lub transformer muaj tsawg to inductance.
Kev cuam tshuam thiab Kev Tiv Thaiv ntawm Kev Hloov Hloov Waveform ntawm Lub Hwj Huam Tube ntawm Kev cuam tshuam Spike Lub squareness ntawm kev hloov waveform Usr(t) cuam tshuam rau kev cuam tshuam loj heev. Lub harmonic amplitudes ntawm cov duab plaub tsis txo qis ntawm tus nqi ntawm 20dB xyoo caum nrog nce zaus, thiab rau cov nthwv dej trapezoid nws yog 40dB xyoo caum. Nco ntsoov hloov qhov steepness ntawm cov duab plaub thiab qhov bluntness ntawm ob lub ces kaum tuaj yeem cuam tshuam cov khoom siv ntau zaus thiab txo qis kev cuam tshuam. Yog li ntawd, qhov hloov pauv ceev ntawm lub transistor hloov thiab lub freewheeling diode yuav tsum raug xaiv kom tsim nyog.
Nyob rau hauv daim phiaj hluav taws xob input, lub suab nrov txwv txoj hauv kev hloov hluav taws xob tswj hluav taws xob hloov mus rau thiab tawm sai sai, lub Didt loj heev, thiab qhov hluav taws xob hloov pauv loj yog tsim los ntawm cov xau inductance ntawm lub zog hluav taws xob, kom cov tswv yim. voltage qhov chaw muaj lub sij hawm luv luv. Kev poob tam sim ntawd ntawm daim phiaj hluav taws xob yuav ua rau lub cev tsis zoo ntawm daim phiaj hluav taws xob thiab ua rau muaj kev cuam tshuam. Kev cuam tshuam hauv cov khoom siv hluav taws xob tuaj yeem cuam tshuam rau kev hloov hluav taws xob tswj hluav taws xob. Lub lim tawm tswv yim muaj qee qhov kev cais tawm, feem ntau yog siv P-hom LC sib npaug lim, uas tuaj yeem ua rau 20dB rau kev cuam tshuam kev cuam tshuam thiab 6dB rau kev cuam tshuam ncov.
Kev cuam tshuam ntawm kev cuam tshuam ncov los ntawm kev hloov hluav taws xob tswj hluav taws xob xaim Thaum hloov hluav taws xob tswj hluav taws xob ua haujlwm, nws radiates cuam tshuam rau hauv qhov chaw. Radiated suab nrov yog inversely proportional rau qhov deb ntawm qhov hluav taws xob qhov chaw. Feem ntau, cov xaim tuaj yeem ua kom deb ntawm 5 cm. Yog tias tus qauv tsis tso cai, nws yuav tsum tau thaiv. Lub zog electromagnetic teb yog generated nyob ib ncig ntawm lub hwj chim input kab. Yuav kom txo tau cov electromagnetic coupling ntawm input kab thiab cov zis kab, ob yuav tsum tau muab cia tseg.
