Main Circuit Court ntawm high zaus switching fais fab mov Circuit Court
Main Circuit Court ntawm high zaus switching fais fab mov Circuit Court
Tag nrho cov txheej txheem ntawm kev tawm tswv yim thiab tso tawm los ntawm AC lub zog hluav taws xob muaj xws li:
1. Input filter: Nws muaj nuj nqi yog lim cov clutter uas twb muaj lawm nyob rau hauv daim phiaj fais fab, thiab tib lub sij hawm, nws kuj tiv thaiv cov clutter generated los ntawm lub tshuab no tsis pub rov qab mus rau pej xeem lub hwj chim daim phiaj.
2. Rectification thiab filtering: AC fais fab mov ntawm daim phiaj hluav taws xob yog ncaj qha rectified rau hauv ib tug smoother DC fais fab mov rau qib tom ntej ntawm kev hloov dua siab tshiab.
3. Inverter: Hloov lub rectified DC rau hauv high-frequency AC, uas yog ib feem ntawm high-frequency switching fais fab mov. Qhov ntau zaus, qhov me me ntawm qhov ntim thiab qhov hnyav rau cov zis hluav taws xob.
4. Tso zis rectification thiab filtering: muab kev ruaj khov thiab txhim khu kev qha DC fais fab mov raws li qhov xav tau ntawm kev thauj khoom.
Circuit Court modulation ntawm high zaus switching fais fab mov
1. pulseWidthModulation (abbreviated li pWM) muaj lub sijhawm hloov pauv tas mus li, thiab lub luag haujlwm lub voj voog hloov pauv los ntawm kev hloov pauv ntawm pulse dav.
Qhov thib ob, pulseFrequencyModulation (pFM) muaj qhov dav ntawm lub plawv dhia tas li, thiab lub voj voog ua haujlwm tau hloov pauv los ntawm kev hloov pauv zaus.
Thib peb, mix modulation
Hom uas nyob rau ntawm mem tes dav thiab qhov hloov zaus tsis tas yuav hloov tau nrog ib leeg yog sib xyaw ntawm ob hom saum toj no.
Lub hauv paus ntsiab lus ntawm switching tswj voltage stabilization
Qhov hloov K yog rov qhib thiab tawm ntawm lub sijhawm qee lub sijhawm. Thaum lub qhov hloov K tau qhib, cov khoom siv hluav taws xob nkag E yog muab rau lub load RL los ntawm kev hloov K thiab lub lim dej, thiab lub zog hluav taws xob E muab lub zog rau lub sijhawm tag nrho lub sijhawm hloov. Thaum lub qhov hloov K raug muab tua, cov khoom siv hluav taws xob nkag E cuam tshuam cov khoom siv hluav taws xob. Nws tuaj yeem pom tias cov khoom siv hluav taws xob nkag mus rau cov khoom thauj tsis sib xws. Txhawm rau ua kom cov khoom tau txais lub zog tas li, lub voj voog tsim los ntawm cov keyboards C2 thiab D muaj cov haujlwm no. Inductor L yog siv los khaws lub zog. Thaum lub tshuab hluav taws xob raug kaw, lub zog khaws cia hauv inductor L raug tso tawm mus rau lub load los ntawm diode D, kom lub load tuaj yeem tau txais lub zog tas mus li thiab ruaj khov. Vim tias diode D ua kom cov load tam sim no tsis tu ncua, nws yog hu ua freewheeling diode. Qhov nruab nrab voltage EAB ntawm AB tuaj yeem qhia los ntawm cov qauv hauv qab no.
EAB=TON/T*E
Qhov twg TON yog lub sijhawm thaum lub sijhawm hloov pauv txhua lub sijhawm, thiab T yog lub luag haujlwm ntawm kev hloov pauv (uas yog, cov lej ntawm lub sijhawm TON thiab lub sijhawm TOFF).
Los ntawm cov qauv, nws tuaj yeem pom tias qhov nruab nrab ntawm qhov hluav taws xob ntawm AB hloov nrog kev hloov pauv ntawm qhov hloov pauv ntawm lub sijhawm thiab lub voj voog ua haujlwm. Yog li ntawd, cov zis voltage V0 tuaj yeem khaws cia tsis tu ncua los ntawm kev hloov kho qhov piv ntawm TON rau T nrog kev hloov pauv ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob. Hloov qhov piv ntawm ON lub sij hawm TON thiab lub voj voog lub luag haujlwm, uas yog, hloov lub luag haujlwm lub voj voog ntawm mem tes, hu ua "TimeRatioControl" (ua luv li TRC).
