"Switch control voltage regulation txoj cai
Qhov hloov K yog rov qhib thiab tawm ntawm lub sijhawm qee lub sijhawm. Thaum lub hloov K yog qhib, lub input fais fab mov E yog muab rau lub load RL los ntawm lub hloov K thiab lub lim circuit, thiab lub hwj chim mov E muab lub zog rau lub load thaum lub sij hawm tag nrho hloov-on lub sij hawm; 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 tau tias cov khoom siv hluav taws xob muab hluav taws xob muab lub zog rau kev thauj khoom tsis tu ncua. Txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm Thaum lub qhov hluav taws xob qhib, ib feem ntawm lub zog yog khaws cia. Thaum disconnected, tso rau load.
Lub Circuit Court tsim ntawm inductor L, capacitor C2 thiab diode D muaj cov haujlwm no. Lub 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 qhov chaw thauj khoom los ntawm diode D, kom lub load tuaj yeem tau txais lub zog tas li thiab ruaj khov. Vim tias lub diode D ua rau cov load tam sim no tsis tu ncua, nws yog hu ua freewheeling. diode. Qhov nruab nrab voltage EAB ntawm AB tuaj yeem qhia tau tias:
EAB=TON/T*E
Nyob rau hauv cov mis, TON yog lub sij hawm thaum lub hloov mus rau txhua lub sij hawm, thiab T yog lub luag hauj lwm voj voog ntawm lub switching on thiab off (piv txwv li, lub sum ntawm lub hloov ntawm lub sij hawm TON thiab lub sij hawm tawm TOFF).
Nws tuaj yeem pom los ntawm cov qauv uas qhov nruab nrab tus nqi ntawm qhov voltage ntawm AB kuj hloov pauv los ntawm kev hloov pauv ntawm qhov hloov ntawm lub sijhawm thiab lub voj voog ua haujlwm. Yog li ntawd, nrog rau kev hloov ntawm lub load thiab lub input fais fab mov voltage, qhov piv ntawm TON thiab T yuav raug kho tau los ua kom cov zis voltage V0 nyob twj ywm tib yam. Hloov lub sij hawm TON thiab lub luag hauj lwm voj voog piv yog hloov lub luag hauj lwm voj voog ntawm lub mem tes. Txoj kev no hu ua ""time ratio control" (Time Ratio Control, abbreviated li TRC).
Raws li txoj cai tswj hwm TRC, muaj peb txoj hauv kev:
1. Pulse Width Modulation (Pulse Width Modulation, abbreviated as PWM)
Lub sijhawm hloov pauv tsis tu ncua, thiab lub voj voog ua haujlwm tau hloov pauv los ntawm kev hloov cov mem tes dav.
2. Pulse Frequency Modulation (Pulse Frequency Modulation, abbreviated as PFM)
Lub tig-on mem tes dav yog tas mus li, thiab lub luag hauj lwm lub voj voog yog hloov los ntawm kev hloov pauv zaus.
3. Kev sib xyaw ua ke
Qhov dav ntawm cov mem tes thiab qhov hloov zaus tsis tas yuav raug kho, thiab tuaj yeem hloov pauv ib leeg. Nws yog kev sib xyaw ntawm ob txoj hauv kev saum toj no. "
