Main Circuit Court ntawm high-frequency switching power supply unit
High-frequency switching power supply circuit, ntawm ib sab, coj mus kuaj los ntawm cov zis, los ntawm kev sib piv nrog cov txheej txheem teeb tsa, thiab tom qab ntawd mus tswj lub inverter, hloov nws zaus los yog mem tes dav, kom ua tiav cov khoom ruaj khov, ntawm qhov tod tes, raws li cov ntaub ntawv muab los ntawm kev xeem Circuit Court, los ntawm kev tiv thaiv Circuit Court los txheeb xyuas, thiab muab kev tswj xyuas Circuit Court ntawm tag nrho lub tshuab kom ua tiav ntau yam kev tiv thaiv.
High-frequency switching fais fab mov Circuit Court lub ntsiab Circuit Court
Los ntawm AC grid input, DC tso zis ntawm tag nrho cov txheej txheem, suav nrog:
1, input lim: nws lub luag hauj lwm yog lim lub xub ntiag ntawm lub hwj chim daim phiaj clutter, tab sis kuj impede lub tshuab generated clutter tawm tswv yim rau pej xeem lub hwj chim daim phiaj.
2, rectification thiab filtering: daim phiaj AC fais fab mov ncaj qha rectified rau hauv lub zog DC smoother rau qib tom ntej ntawm kev hloov dua siab tshiab.
3, inverter: rectified DC rau hauv high-frequency alternating tam sim no, uas yog ib feem ntawm lub high-frequency switching fais fab mov, qhov ntau dua qhov zaus, ntim, hnyav thiab tso zis zog piv yog me me.
4, tso zis rectification thiab filtering: raws li lub load xav tau, muab ib tug ruaj khov thiab txhim khu kev qha DC fais fab mov.
High zaus switching fais fab mov Circuit Court modulation
Ua ntej, pulseWidthModulation (pulseWidthModulation, abbreviated li pWM) hloov lub sij hawm yog tas li, los ntawm kev hloov lub mem tes dav los hloov lub luag hauj lwm voj voog.
Qhov thib ob, lub pulse zaus modulation (pulseFrequencyModulation, abbreviated li pFM) conduction mem tes dav yog tas li, los ntawm kev hloov pauv zaus hloov lub voj voog ua haujlwm.
Hybrid modulation
On-pulse dav thiab hloov zaus tsis tas, txhua tus tuaj yeem hloov txoj kev, nws yog qhov sib xyaw ntawm ob txoj kev saum toj no.
Switching tswj voltage regulator txoj cai
Hloov K mus rau ib lub sij hawm luv luv rov qhib thiab tawm, hauv qhov hloov K ntawm, cov khoom siv hluav taws xob nkag E los ntawm kev hloov K thiab lim Circuit Court los muab cov load RL, nyob rau hauv tag nrho cov hloov ntawm lub sij hawm, fais fab mov E mus rau lub load. 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 tias cov khoom siv hluav taws xob nkag mus rau cov khoom thauj los muab lub zog sib cuam tshuam, txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau kom tau txais lub zog txuas ntxiv, hloov C2 thiab D Circuit Court, muaj txoj haujlwm no. Lub inductor L yog siv los khaws lub zog thiab thaum hloov pauv, lub zog khaws cia hauv inductor L raug tso tawm mus rau qhov chaw thauj khoom los ntawm diode D, kom lub load tau muab nrog lub zog tas li thiab ruaj khov, vim tias lub diode D ua rau cov khoom thauj khoom. load tam sim no nruam, yog li nws yog hu ua continuity diode. Qhov nruab nrab tus nqi ntawm qhov hluav taws xob EAB ntawm AB tuaj yeem qhia los ntawm kab zauv hauv qab no
EAB=TON/T*E
Qhov twg TON rau txhua qhov hloov ntawm lub sijhawm, T rau qhov hloov mus rau thiab tawm lub voj voog ua haujlwm (piv txwv li, hloov lub sijhawm TON thiab lub sijhawm tawm TOFF sum).
Raws li tuaj yeem pom los ntawm cov qauv, hloov qhov hloov ntawm lub sijhawm thiab qhov sib piv ntawm lub voj voog khiav haujlwm, qhov nruab nrab tus nqi ntawm qhov voltage ntawm AB kuj hloov, yog li ntawd, nrog rau cov load thiab cov input fais fab mov voltage hloov kho qhov piv ntawm TON thiab T yuav muaj peev xwm ua kom cov 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 yog hu ua "time ratio control" (TimeRatioControl, abbreviated li TRC).
