Load testing thiab switching power supply txoj cai
Ua ntej, lub ntsiab Circuit Court los ntawm AC zog daim phiaj tswv yim, DC tso zis ntawm tag nrho cov txheej txheem, xws li: 1, input lim: nws lub luag hauj lwm yog lim lub xub ntiag ntawm daim phiaj clutter, tab sis kuj impede lub clutter generated los ntawm lub tshuab tawm tswv yim rau pej xeem. daim phiaj. 2, rectification thiab filtering: daim phiaj AC fais fab mov yog ncaj qha rectified rau DC smoother rau kev hloov dua siab tshiab. 3, inverter: rectified DC rau hauv high-frequency AC, uas yog ib feem ntawm lub high-frequency Switching fais fab mov yog lub hauv paus, qhov ntau dua qhov zaus, ntim, qhov hnyav thiab cov zis fais fab piv ntawm lub tsev kawm ntawv 4, cov zis rectifier thiab kev lim dej: raws li qhov xav tau ntawm cov khoom thauj, muab lub zog ruaj khov thiab txhim khu kev qha DC fais fab mov.
Thib ob, kev tswj xyuas Circuit Court, ntawm ib sab, piv txwv los ntawm cov zis, tom qab sib piv nrog cov txheej txheem teeb tsa, thiab tom qab ntawd mus tswj lub inverter, hloov nws zaus lossis mem tes dav, kom ua tiav cov zis ruaj khov, ntawm qhov tod tes, raws li cov ntaub ntawv muab los ntawm kev ntsuas Circuit Court, txheeb xyuas los ntawm kev tiv thaiv Circuit Court, muab kev tswj xyuas Circuit Court ntawm lub tshuab kom ua tiav ntau yam kev tiv thaiv.
Thib peb, qhov ntsuas hluav taws xob ntxiv rau kev muab kev tiv thaiv hluav taws xob tau khiav hauv ntau qhov tsis sib xws, tab sis kuj muab ntau yam ntaub ntawv ntsuas ntsuas.
Plaub, lub koom haum pab fais fab mov los muab tag nrho cov kev xav tau sib txawv ntawm ib lub zog hluav taws xob. Switching tswj voltage regulator txoj cai hloov K mus rau ib tug tej lub sij hawm luv luv ntawm thiab tawm, nyob rau hauv lub hloov K on, lub input fais fab mov E los ntawm kev hloov K thiab filtering Circuit Court muab rau lub load RL, nyob rau hauv tag nrho cov hloov ntawm lub sij hawm, lub hwj chim. muab E rau lub load los muab lub zog; Thaum qhov hloov K tawm, cov khoom siv hluav taws xob nkag E yuav cuam tshuam kev muab lub zog. Nws tuaj yeem pom, cov khoom siv hluav taws xob nkag mus rau kev thauj khoom los muab lub zog sib cuam tshuam, txhawm rau txhawm rau txhawm rau txhawm rau kom tau txais cov khoom siv hluav taws xob tas mus li, kev hloov hluav taws xob tswj hluav taws xob yuav tsum muaj cov khoom siv hluav taws xob khaws cia, ib feem ntawm lub zog yuav yog. khaws cia thaum lub hloov pauv tau qhib, thaum lub hloov pauv raug txiav, mus rau qhov tso tawm. Nyob rau hauv daim duab, lub Circuit Court muaj xws li inductor L, capacitor C2 thiab diode D muaj cov haujlwm no. Inductor L yog siv los khaws lub zog, thiab thaum hloov pauv, lub zog khaws cia hauv inductor L raug tso tawm mus rau lub load los ntawm diode D, kom lub load tau txais lub zog tas mus li thiab ruaj khov, vim tias diode D ua rau cov load tam sim no tas mus li, yog li ntawd. nws yog hu ua continuity diode. Qhov nruab nrab tus nqi ntawm qhov hluav taws xob ntawm AB EAB tuaj yeem hais qhia hauv cov qauv hauv qab no: qhov twg TON yog qhov hloov pauv ntawm txhua lub sijhawm, T yog qhov hloov mus rau thiab tawm ntawm lub voj voog ua haujlwm (piv txwv li, qhov hloov ntawm lub sijhawm TON thiab tawm sijhawm TOFF thiab cov sum ntawm lub sijhawm). Raws li tuaj yeem pom los ntawm cov qauv, hloov qhov hloov ntawm lub sijhawm thiab qhov sib piv ntawm lub voj voog ua haujlwm, qhov nruab nrab tus nqi ntawm qhov voltage ntawm AB kuj hloov, yog li ntawd, nrog rau cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob hloov pauv hloov kho qhov piv ntawm TON thiab T yuav muaj peev xwm ua kom qhov tso zis voltage V0 kom zoo ib yam. Hloov lub sij hawm TON thiab qhov kev faib ua feem ntawm lub voj voog khiav hauj lwm kuj yog los hloov lub luag hauj lwm lub voj voog ntawm cov mem tes, txoj kev no hu ua "time ratio control" (TimeRatioControl, abbreviated li TRC).
