High zaus fais fab mov Circuit Court modulation
Main Circuit Court ntawm high-frequency 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, suav nrog:
1. Input filter: Nws muaj nuj nqi yog lim tawm cov clutter uas twb muaj lawm nyob rau hauv lub hwj chim daim phiaj, thaum tseem hindering lub tswv yim ntawm cov generated clutter rau pej xeem lub hwj chim daim phiaj.
2. Rectification thiab filtering: ncaj qha rectifying AC fais fab mov ntawm daim phiaj fais fab mus rau smoother DC fais fab mov rau qib tom ntej ntawm kev hloov.
3. Inversion: Hloov lub zog DC rectified rau hauv high-frequency AC zog, uas yog ib feem ntawm lub high-frequency switching fais fab mov. Qhov ntau zaus, qhov sib piv me me ntawm ntim, qhov hnyav, thiab cov zis hluav taws xob.
4. Tso zis rectification thiab filtering: Muab ruaj khov thiab txhim khu kev qha DC fais fab mov raws li qhov yuav tsum tau ua.
High zaus switching fais fab mov Circuit Court modulation
1, Pulse Width Modulation (pWM) muaj lub voj voog hloov tas li, uas tau ua tiav los ntawm kev hloov lub mem tes dav los hloov lub voj voog ua haujlwm.
2, Pulse Frequency Modulation (pFM) muaj qhov ua haujlwm tas li pulse dav thiab hloov lub luag haujlwm lub voj voog los ntawm kev hloov pauv kev ua haujlwm zaus ntawm qhov hloov.
3, Hybrid modulation
Lub conduction mem tes dav thiab hloov zaus tsis tas yuav hloov los ntawm ib leeg, uas yog kev sib txuas ntawm ob txoj kev saum toj no.
Lub hauv paus ntsiab lus ntawm kev hloov tswj voltage stabilization
Hloov K rov qhib thiab tawm ntawm qee lub sijhawm. Thaum hloov K yog qhib, input fais fab E yog muab los thauj RL los ntawm kev hloov K thiab lim circuit. Thaum lub sijhawm hloov pauv tag nrho, lub zog E muab lub zog rau kev thauj khoom; Thaum hloov K raug rho tawm, lub zog tawm tswv yim E cuam tshuam cov khoom siv hluav taws xob. Nws tuaj yeem pom tau tias cov khoom siv hluav taws xob muab hluav taws xob muab lub zog rau kev thauj khoom tsis tu ncua. Txhawm rau kom cov khoom thauj kom tau txais cov khoom siv hluav taws xob tas mus li, Circuit Court 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 txiav tawm, lub zog khaws cia hauv inductor L raug tso tawm mus rau lub load los ntawm diode D, tso cai rau lub load kom tau txais lub zog tas mus li thiab ruaj khov. Txij li thaum diode D khaws cov load tam sim no tsis tu ncua, nws yog hu ua nruam diode. Qhov nruab nrab voltage EAB ntawm AB tuaj yeem qhia tau raws li hauv qab no: EAB=TON/T * E
Nyob rau hauv cov mis, TON sawv cev rau lub sij hawm txhua lub sij hawm lub switching yog qhib, thiab T sawv cev rau lub voj voog ua hauj lwm ntawm lub switching on / off (piv txwv li lub sum ntawm lub hloov nyob rau hauv lub sij hawm TON thiab off time TOFF).
Los ntawm qhov sib npaug, nws tuaj yeem pom tau tias kev hloov pauv hloov ntawm lub sijhawm thiab lub voj voog ua haujlwm kuj hloov qhov nruab nrab voltage ntawm AB. Yog li ntawd, cia li kho qhov piv ntawm TON thiab T nrog kev hloov pauv hauv kev thauj khoom thiab cov khoom siv hluav taws xob hluav taws xob tuaj yeem tswj tau qhov tso zis voltage V0 tsis hloov. Hloov lub sij hawm TON thiab lub luag hauj lwm voj voog piv, tseem hu ua hloov lub luag hauj lwm voj voog ntawm lub mem tes, yog ib txoj kev hu ua "Time Ratio Control" (TRC).
